./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 15:29:02,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:29:02,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:29:02,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:29:02,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:29:02,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:29:02,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:29:02,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:29:02,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:29:02,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:29:02,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:29:02,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:29:02,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:29:02,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:29:02,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:29:02,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:29:02,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:29:02,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:29:02,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:29:02,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:29:02,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:29:02,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:29:02,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:29:02,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:29:02,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:29:02,210 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:29:02,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:29:02,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:29:02,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:29:02,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:29:02,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:29:02,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:29:02,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:29:02,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:29:02,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:29:02,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:29:02,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:29:02,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:29:02,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:29:02,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:29:02,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:29:02,217 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 15:29:02,232 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:29:02,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:29:02,232 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:29:02,232 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:29:02,232 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:29:02,233 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:29:02,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:29:02,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:29:02,233 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:29:02,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:29:02,234 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:29:02,234 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 15:29:02,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:29:02,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:29:02,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:29:02,234 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 15:29:02,234 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 15:29:02,235 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 15:29:02,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:29:02,235 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 15:29:02,235 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:29:02,235 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:29:02,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:29:02,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:29:02,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:29:02,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:29:02,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:29:02,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:29:02,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:29:02,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:29:02,237 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:29:02,237 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:29:02,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:29:02,237 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:29:02,237 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_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca [2022-12-13 15:29:02,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:29:02,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:29:02,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:29:02,443 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:29:02,444 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:29:02,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-12-13 15:29:05,045 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:29:05,181 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:29:05,181 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-12-13 15:29:05,186 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/data/7a884935e/bfebeae82f0a47ed921829e96d0cb656/FLAG71666492a [2022-12-13 15:29:05,197 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/data/7a884935e/bfebeae82f0a47ed921829e96d0cb656 [2022-12-13 15:29:05,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:29:05,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:29:05,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:29:05,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:29:05,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:29:05,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:29:05" (1/1) ... [2022-12-13 15:29:05,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51649e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:05, skipping insertion in model container [2022-12-13 15:29:05,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:29:05" (1/1) ... [2022-12-13 15:29:05,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:29:05,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:29:05,344 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:05,345 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:05,345 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:05,345 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:05,347 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:05,347 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:05,350 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:05,350 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:05,351 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:05,351 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:05,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:05,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:05,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:05,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:05,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:05,356 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:05,361 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_2bdb3631-5b0b-4dbe-998d-cb571e932321/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-12-13 15:29:05,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:29:05,377 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-13 15:29:05,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@53475326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:05, skipping insertion in model container [2022-12-13 15:29:05,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:29:05,377 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 15:29:05,379 INFO L158 Benchmark]: Toolchain (without parser) took 178.15ms. Allocated memory is still 123.7MB. Free memory was 88.9MB in the beginning and 78.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 15:29:05,379 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 123.7MB. Free memory is still 95.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 15:29:05,380 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.48ms. Allocated memory is still 123.7MB. Free memory was 88.9MB in the beginning and 78.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 15:29:05,380 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 123.7MB. Free memory is still 95.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 176.48ms. Allocated memory is still 123.7MB. Free memory was 88.9MB in the beginning and 78.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 129]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 15:29:06,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:29:06,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:29:06,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:29:06,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:29:06,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:29:06,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:29:06,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:29:06,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:29:06,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:29:06,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:29:06,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:29:06,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:29:06,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:29:06,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:29:06,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:29:06,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:29:06,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:29:06,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:29:06,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:29:06,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:29:06,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:29:06,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:29:06,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:29:06,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:29:06,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:29:06,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:29:06,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:29:06,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:29:06,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:29:06,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:29:06,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:29:06,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:29:06,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:29:06,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:29:06,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:29:06,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:29:06,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:29:06,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:29:06,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:29:06,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:29:06,845 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 15:29:06,870 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:29:06,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:29:06,871 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:29:06,871 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:29:06,872 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:29:06,872 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:29:06,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:29:06,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:29:06,873 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:29:06,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:29:06,873 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:29:06,873 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 15:29:06,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:29:06,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:29:06,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:29:06,874 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 15:29:06,874 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 15:29:06,874 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 15:29:06,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:29:06,874 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 15:29:06,875 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 15:29:06,875 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 15:29:06,875 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:29:06,875 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:29:06,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:29:06,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:29:06,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:29:06,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:29:06,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:29:06,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:29:06,876 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 15:29:06,876 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 15:29:06,876 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:29:06,877 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:29:06,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:29:06,877 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 15:29:06,877 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:29:06,877 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_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca [2022-12-13 15:29:07,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:29:07,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:29:07,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:29:07,138 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:29:07,138 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:29:07,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-12-13 15:29:09,637 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:29:09,805 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:29:09,805 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-12-13 15:29:09,810 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/data/10e12c7db/bac28b165a7948d89a6fca4fab1e1c07/FLAG95ecf75fb [2022-12-13 15:29:09,822 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/data/10e12c7db/bac28b165a7948d89a6fca4fab1e1c07 [2022-12-13 15:29:09,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:29:09,825 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:29:09,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:29:09,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:29:09,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:29:09,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:29:09" (1/1) ... [2022-12-13 15:29:09,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@316eb3ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:09, skipping insertion in model container [2022-12-13 15:29:09,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:29:09" (1/1) ... [2022-12-13 15:29:09,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:29:09,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:29:10,002 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,003 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,003 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,004 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,005 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,006 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,009 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,009 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,009 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,010 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,010 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,011 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,012 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,014 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,021 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_2bdb3631-5b0b-4dbe-998d-cb571e932321/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-12-13 15:29:10,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:29:10,037 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 15:29:10,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:29:10,043 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,044 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,044 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,045 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,045 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,046 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,047 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,047 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,047 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,048 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,048 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,049 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,050 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,051 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,051 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,055 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_2bdb3631-5b0b-4dbe-998d-cb571e932321/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-12-13 15:29:10,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:29:10,061 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:29:10,070 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,071 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,071 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,071 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,072 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,072 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,073 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,073 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,073 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,073 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,074 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,074 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,075 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,076 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,076 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:29:10,077 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:29:10,079 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_2bdb3631-5b0b-4dbe-998d-cb571e932321/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-12-13 15:29:10,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:29:10,093 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:29:10,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:10 WrapperNode [2022-12-13 15:29:10,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:29:10,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:29:10,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:29:10,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:29:10,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:10" (1/1) ... [2022-12-13 15:29:10,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:10" (1/1) ... [2022-12-13 15:29:10,123 INFO L138 Inliner]: procedures = 28, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 135 [2022-12-13 15:29:10,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:29:10,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:29:10,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:29:10,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:29:10,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:10" (1/1) ... [2022-12-13 15:29:10,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:10" (1/1) ... [2022-12-13 15:29:10,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:10" (1/1) ... [2022-12-13 15:29:10,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:10" (1/1) ... [2022-12-13 15:29:10,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:10" (1/1) ... [2022-12-13 15:29:10,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:10" (1/1) ... [2022-12-13 15:29:10,145 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:10" (1/1) ... [2022-12-13 15:29:10,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:10" (1/1) ... [2022-12-13 15:29:10,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:29:10,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:29:10,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:29:10,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:29:10,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:10" (1/1) ... [2022-12-13 15:29:10,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:29:10,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:29:10,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:29:10,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:29:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:29:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 15:29:10,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:29:10,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 15:29:10,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 15:29:10,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 15:29:10,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 15:29:10,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 15:29:10,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 15:29:10,215 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 15:29:10,215 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 15:29:10,215 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 15:29:10,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 15:29:10,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 15:29:10,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 15:29:10,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:29:10,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:29:10,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:29:10,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 15:29:10,217 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 15:29:10,312 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:29:10,314 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:29:10,810 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:29:10,898 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:29:10,898 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 15:29:10,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:29:10 BoogieIcfgContainer [2022-12-13 15:29:10,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:29:10,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:29:10,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:29:10,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:29:10,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:29:09" (1/3) ... [2022-12-13 15:29:10,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a705f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:29:10, skipping insertion in model container [2022-12-13 15:29:10,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:29:10" (2/3) ... [2022-12-13 15:29:10,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a705f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:29:10, skipping insertion in model container [2022-12-13 15:29:10,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:29:10" (3/3) ... [2022-12-13 15:29:10,906 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2022-12-13 15:29:10,920 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:29:10,920 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-12-13 15:29:10,920 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:29:10,975 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 15:29:11,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 210 transitions, 452 flow [2022-12-13 15:29:11,053 INFO L130 PetriNetUnfolder]: 12/206 cut-off events. [2022-12-13 15:29:11,053 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 15:29:11,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 206 events. 12/206 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-12-13 15:29:11,057 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 210 transitions, 452 flow [2022-12-13 15:29:11,062 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 201 transitions, 426 flow [2022-12-13 15:29:11,064 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:29:11,072 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 201 transitions, 426 flow [2022-12-13 15:29:11,074 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 201 transitions, 426 flow [2022-12-13 15:29:11,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 201 transitions, 426 flow [2022-12-13 15:29:11,103 INFO L130 PetriNetUnfolder]: 12/201 cut-off events. [2022-12-13 15:29:11,103 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 15:29:11,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 201 events. 12/201 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 285 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-12-13 15:29:11,106 INFO L119 LiptonReduction]: Number of co-enabled transitions 4948 [2022-12-13 15:29:38,526 INFO L134 LiptonReduction]: Checked pairs total: 8066 [2022-12-13 15:29:38,526 INFO L136 LiptonReduction]: Total number of compositions: 199 [2022-12-13 15:29:38,539 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:29:38,545 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;@788f18be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:29:38,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2022-12-13 15:29:38,548 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 15:29:38,548 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:29:38,548 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:29:38,549 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:29:38,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:29:38,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:29:38,553 INFO L85 PathProgramCache]: Analyzing trace with hash 27413, now seen corresponding path program 1 times [2022-12-13 15:29:38,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:29:38,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109073035] [2022-12-13 15:29:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:29:38,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:38,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:29:38,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:29:38,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 15:29:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:29:38,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:29:38,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:29:38,802 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 15:29:38,803 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 15:29:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:29:38,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:29:38,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:29:38,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109073035] [2022-12-13 15:29:38,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109073035] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:29:38,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:29:38,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:29:38,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167966402] [2022-12-13 15:29:38,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:29:38,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:29:38,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:29:38,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:29:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:29:38,998 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 409 [2022-12-13 15:29:39,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:39,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:29:39,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 409 [2022-12-13 15:29:39,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:29:40,303 INFO L130 PetriNetUnfolder]: 9120/11751 cut-off events. [2022-12-13 15:29:40,303 INFO L131 PetriNetUnfolder]: For 137/137 co-relation queries the response was YES. [2022-12-13 15:29:40,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24001 conditions, 11751 events. 9120/11751 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 55809 event pairs, 6418 based on Foata normal form. 0/5116 useless extension candidates. Maximal degree in co-relation 21662. Up to 11725 conditions per place. [2022-12-13 15:29:40,381 INFO L137 encePairwiseOnDemand]: 398/409 looper letters, 52 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2022-12-13 15:29:40,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 246 flow [2022-12-13 15:29:40,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:29:40,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:29:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2022-12-13 15:29:40,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4718826405867971 [2022-12-13 15:29:40,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2022-12-13 15:29:40,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2022-12-13 15:29:40,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:29:40,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2022-12-13 15:29:40,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:40,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:40,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:40,406 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 160 flow. Second operand 3 states and 579 transitions. [2022-12-13 15:29:40,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 246 flow [2022-12-13 15:29:40,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 58 transitions, 230 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 15:29:40,427 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 126 flow [2022-12-13 15:29:40,428 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=59, 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=126, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2022-12-13 15:29:40,430 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -16 predicate places. [2022-12-13 15:29:40,431 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 126 flow [2022-12-13 15:29:40,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:40,431 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:29:40,431 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:29:40,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:29:40,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:40,633 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:29:40,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:29:40,634 INFO L85 PathProgramCache]: Analyzing trace with hash 27414, now seen corresponding path program 1 times [2022-12-13 15:29:40,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:29:40,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376313278] [2022-12-13 15:29:40,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:29:40,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:40,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:29:40,640 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:29:40,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 15:29:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:29:40,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 15:29:40,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:29:40,990 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:29:40,990 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:29:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:29:41,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:29:41,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:29:41,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376313278] [2022-12-13 15:29:41,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376313278] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:29:41,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:29:41,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:29:41,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915741964] [2022-12-13 15:29:41,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:29:41,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:29:41,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:29:41,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:29:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:29:41,241 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 409 [2022-12-13 15:29:41,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:41,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:29:41,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 409 [2022-12-13 15:29:41,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:29:43,134 INFO L130 PetriNetUnfolder]: 18239/23500 cut-off events. [2022-12-13 15:29:43,134 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:29:43,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47398 conditions, 23500 events. 18239/23500 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1388. Compared 121850 event pairs, 12836 based on Foata normal form. 0/10303 useless extension candidates. Maximal degree in co-relation 47392. Up to 11726 conditions per place. [2022-12-13 15:29:43,226 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 102 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2022-12-13 15:29:43,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 444 flow [2022-12-13 15:29:43,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:29:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:29:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2022-12-13 15:29:43,229 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5134474327628362 [2022-12-13 15:29:43,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2022-12-13 15:29:43,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2022-12-13 15:29:43,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:29:43,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2022-12-13 15:29:43,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:43,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:43,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:43,233 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 126 flow. Second operand 3 states and 630 transitions. [2022-12-13 15:29:43,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 444 flow [2022-12-13 15:29:43,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 109 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:29:43,234 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 137 flow [2022-12-13 15:29:43,234 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2022-12-13 15:29:43,235 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2022-12-13 15:29:43,235 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 137 flow [2022-12-13 15:29:43,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:43,235 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:29:43,236 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:29:43,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 15:29:43,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:43,436 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:29:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:29:43,437 INFO L85 PathProgramCache]: Analyzing trace with hash 27501, now seen corresponding path program 1 times [2022-12-13 15:29:43,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:29:43,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028563151] [2022-12-13 15:29:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:29:43,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:43,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:29:43,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:29:43,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 15:29:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:29:43,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:29:43,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:29:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:29:43,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:29:43,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:29:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028563151] [2022-12-13 15:29:43,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028563151] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:29:43,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:29:43,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:29:43,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454724702] [2022-12-13 15:29:43,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:29:43,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:29:43,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:29:43,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:29:43,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:29:43,550 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 409 [2022-12-13 15:29:43,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:43,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:29:43,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 409 [2022-12-13 15:29:43,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:29:44,510 INFO L130 PetriNetUnfolder]: 9120/11752 cut-off events. [2022-12-13 15:29:44,510 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:29:44,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23711 conditions, 11752 events. 9120/11752 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 55956 event pairs, 6418 based on Foata normal form. 1/5119 useless extension candidates. Maximal degree in co-relation 23703. Up to 11726 conditions per place. [2022-12-13 15:29:44,550 INFO L137 encePairwiseOnDemand]: 404/409 looper letters, 52 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2022-12-13 15:29:44,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 59 transitions, 245 flow [2022-12-13 15:29:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:29:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:29:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2022-12-13 15:29:44,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4767726161369193 [2022-12-13 15:29:44,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2022-12-13 15:29:44,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2022-12-13 15:29:44,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:29:44,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2022-12-13 15:29:44,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:44,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:44,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:44,556 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 137 flow. Second operand 3 states and 585 transitions. [2022-12-13 15:29:44,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 59 transitions, 245 flow [2022-12-13 15:29:44,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 241 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 15:29:44,558 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 145 flow [2022-12-13 15:29:44,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2022-12-13 15:29:44,558 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2022-12-13 15:29:44,559 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 145 flow [2022-12-13 15:29:44,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:44,559 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:29:44,559 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:29:44,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 15:29:44,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:44,760 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:29:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:29:44,761 INFO L85 PathProgramCache]: Analyzing trace with hash 852386, now seen corresponding path program 1 times [2022-12-13 15:29:44,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:29:44,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831695648] [2022-12-13 15:29:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:29:44,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:44,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:29:44,762 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:29:44,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 15:29:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:29:44,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 15:29:44,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:29:44,997 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:29:44,998 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:29:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:29:45,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:29:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:29:45,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:29:45,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831695648] [2022-12-13 15:29:45,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831695648] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:29:45,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:29:45,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 15:29:45,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649295861] [2022-12-13 15:29:45,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:29:45,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:29:45,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:29:45,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:29:45,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:29:46,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 409 [2022-12-13 15:29:46,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 145 flow. Second operand has 6 states, 6 states have (on average 168.0) internal successors, (1008), 6 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:46,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:29:46,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 409 [2022-12-13 15:29:46,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:29:48,218 INFO L130 PetriNetUnfolder]: 18245/23509 cut-off events. [2022-12-13 15:29:48,218 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:29:48,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47439 conditions, 23509 events. 18245/23509 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1388. Compared 121786 event pairs, 12836 based on Foata normal form. 0/10310 useless extension candidates. Maximal degree in co-relation 47429. Up to 11729 conditions per place. [2022-12-13 15:29:48,310 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 102 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2022-12-13 15:29:48,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 118 transitions, 521 flow [2022-12-13 15:29:48,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:29:48,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:29:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1118 transitions. [2022-12-13 15:29:48,341 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45558272208638956 [2022-12-13 15:29:48,341 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1118 transitions. [2022-12-13 15:29:48,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1118 transitions. [2022-12-13 15:29:48,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:29:48,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1118 transitions. [2022-12-13 15:29:48,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.33333333333334) internal successors, (1118), 6 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:48,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:48,346 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:48,346 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 145 flow. Second operand 6 states and 1118 transitions. [2022-12-13 15:29:48,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 118 transitions, 521 flow [2022-12-13 15:29:48,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 118 transitions, 517 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:29:48,348 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 239 flow [2022-12-13 15:29:48,348 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=239, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2022-12-13 15:29:48,348 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -5 predicate places. [2022-12-13 15:29:48,348 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 239 flow [2022-12-13 15:29:48,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 168.0) internal successors, (1008), 6 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:48,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:29:48,349 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:29:48,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 15:29:48,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:48,550 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:29:48,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:29:48,550 INFO L85 PathProgramCache]: Analyzing trace with hash 852473, now seen corresponding path program 1 times [2022-12-13 15:29:48,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:29:48,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316243479] [2022-12-13 15:29:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:29:48,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:48,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:29:48,552 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:29:48,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 15:29:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:29:48,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 15:29:48,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:29:48,709 INFO L321 Elim1Store]: treesize reduction 210, result has 13.6 percent of original size [2022-12-13 15:29:48,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 73 [2022-12-13 15:29:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:29:48,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:29:48,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:29:48,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316243479] [2022-12-13 15:29:48,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316243479] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:29:48,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:29:48,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:29:48,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402339787] [2022-12-13 15:29:48,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:29:48,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:29:48,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:29:48,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:29:48,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:29:48,971 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 409 [2022-12-13 15:29:48,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 239 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:48,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:29:48,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 409 [2022-12-13 15:29:48,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:29:50,375 INFO L130 PetriNetUnfolder]: 15291/19833 cut-off events. [2022-12-13 15:29:50,376 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 15:29:50,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40113 conditions, 19833 events. 15291/19833 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1222. Compared 102024 event pairs, 10700 based on Foata normal form. 0/8871 useless extension candidates. Maximal degree in co-relation 40099. Up to 19781 conditions per place. [2022-12-13 15:29:50,447 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 58 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2022-12-13 15:29:50,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 64 transitions, 331 flow [2022-12-13 15:29:50,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:29:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:29:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2022-12-13 15:29:50,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46373268133659334 [2022-12-13 15:29:50,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2022-12-13 15:29:50,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2022-12-13 15:29:50,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:29:50,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2022-12-13 15:29:50,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:50,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:50,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:50,456 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 239 flow. Second operand 3 states and 569 transitions. [2022-12-13 15:29:50,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 64 transitions, 331 flow [2022-12-13 15:29:50,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 64 transitions, 313 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-13 15:29:50,458 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 197 flow [2022-12-13 15:29:50,458 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2022-12-13 15:29:50,459 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -6 predicate places. [2022-12-13 15:29:50,459 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 197 flow [2022-12-13 15:29:50,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:50,460 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:29:50,460 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:29:50,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-13 15:29:50,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:50,661 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:29:50,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:29:50,662 INFO L85 PathProgramCache]: Analyzing trace with hash 852471, now seen corresponding path program 1 times [2022-12-13 15:29:50,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:29:50,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394100707] [2022-12-13 15:29:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:29:50,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:50,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:29:50,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:29:50,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 15:29:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:29:50,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 15:29:50,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:29:50,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:29:50,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:29:50,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:29:50,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:29:50,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:29:50,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:29:50,908 INFO L321 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2022-12-13 15:29:50,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2022-12-13 15:29:50,937 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-12-13 15:29:50,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-12-13 15:29:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:29:51,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:29:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:29:51,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:29:51,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394100707] [2022-12-13 15:29:51,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394100707] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:29:51,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:29:51,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 15:29:51,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512267204] [2022-12-13 15:29:51,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:29:51,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:29:51,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:29:51,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:29:51,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:29:52,017 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 15:29:52,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:52,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:29:52,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 15:29:52,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:29:54,138 INFO L130 PetriNetUnfolder]: 13813/17994 cut-off events. [2022-12-13 15:29:54,138 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 15:29:54,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36420 conditions, 17994 events. 13813/17994 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 1102. Compared 92310 event pairs, 9632 based on Foata normal form. 0/8259 useless extension candidates. Maximal degree in co-relation 36405. Up to 9887 conditions per place. [2022-12-13 15:29:54,202 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 94 selfloop transitions, 9 changer transitions 0/108 dead transitions. [2022-12-13 15:29:54,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 108 transitions, 495 flow [2022-12-13 15:29:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:29:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:29:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1248 transitions. [2022-12-13 15:29:54,205 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43590639189661196 [2022-12-13 15:29:54,205 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1248 transitions. [2022-12-13 15:29:54,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1248 transitions. [2022-12-13 15:29:54,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:29:54,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1248 transitions. [2022-12-13 15:29:54,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.28571428571428) internal successors, (1248), 7 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:54,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:54,214 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:54,214 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 197 flow. Second operand 7 states and 1248 transitions. [2022-12-13 15:29:54,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 108 transitions, 495 flow [2022-12-13 15:29:54,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 108 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:29:54,217 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 204 flow [2022-12-13 15:29:54,217 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=204, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2022-12-13 15:29:54,218 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2022-12-13 15:29:54,218 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 204 flow [2022-12-13 15:29:54,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:54,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:29:54,218 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:29:54,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 15:29:54,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:54,420 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:29:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:29:54,422 INFO L85 PathProgramCache]: Analyzing trace with hash 819245532, now seen corresponding path program 1 times [2022-12-13 15:29:54,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:29:54,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626391584] [2022-12-13 15:29:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:29:54,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:54,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:29:54,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:29:54,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 15:29:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:29:54,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:29:54,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:29:54,602 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 15:29:54,603 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 15:29:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:29:54,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:29:54,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:29:54,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626391584] [2022-12-13 15:29:54,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626391584] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:29:54,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:29:54,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:29:54,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876798015] [2022-12-13 15:29:54,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:29:54,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:29:54,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:29:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:29:54,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:29:54,743 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 409 [2022-12-13 15:29:54,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:54,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:29:54,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 409 [2022-12-13 15:29:54,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:29:55,548 INFO L130 PetriNetUnfolder]: 7711/10172 cut-off events. [2022-12-13 15:29:55,548 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-12-13 15:29:55,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20817 conditions, 10172 events. 7711/10172 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 48606 event pairs, 5274 based on Foata normal form. 0/5565 useless extension candidates. Maximal degree in co-relation 20800. Up to 10127 conditions per place. [2022-12-13 15:29:55,580 INFO L137 encePairwiseOnDemand]: 401/409 looper letters, 49 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2022-12-13 15:29:55,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 57 transitions, 302 flow [2022-12-13 15:29:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:29:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:29:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 713 transitions. [2022-12-13 15:29:55,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4358190709046455 [2022-12-13 15:29:55,582 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 713 transitions. [2022-12-13 15:29:55,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 713 transitions. [2022-12-13 15:29:55,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:29:55,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 713 transitions. [2022-12-13 15:29:55,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.25) internal successors, (713), 4 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:55,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:55,585 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:55,585 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 204 flow. Second operand 4 states and 713 transitions. [2022-12-13 15:29:55,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 57 transitions, 302 flow [2022-12-13 15:29:55,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 57 transitions, 276 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-12-13 15:29:55,586 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 178 flow [2022-12-13 15:29:55,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2022-12-13 15:29:55,586 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -8 predicate places. [2022-12-13 15:29:55,586 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 178 flow [2022-12-13 15:29:55,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:55,587 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:29:55,587 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:29:55,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 15:29:55,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:55,789 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:29:55,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:29:55,790 INFO L85 PathProgramCache]: Analyzing trace with hash 819245533, now seen corresponding path program 1 times [2022-12-13 15:29:55,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:29:55,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058609145] [2022-12-13 15:29:55,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:29:55,791 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:55,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:29:55,794 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:29:55,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 15:29:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:29:55,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:29:55,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:29:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:29:55,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:29:55,966 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 [2022-12-13 15:29:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:29:56,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:29:56,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058609145] [2022-12-13 15:29:56,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058609145] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:29:56,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:29:56,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 15:29:56,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492820648] [2022-12-13 15:29:56,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:29:56,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:29:56,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:29:56,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:29:56,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:29:56,852 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 409 [2022-12-13 15:29:56,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 178 flow. Second operand has 8 states, 8 states have (on average 167.25) internal successors, (1338), 8 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:56,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:29:56,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 409 [2022-12-13 15:29:56,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:29:57,991 INFO L130 PetriNetUnfolder]: 7711/10164 cut-off events. [2022-12-13 15:29:57,991 INFO L131 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2022-12-13 15:29:58,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20801 conditions, 10164 events. 7711/10164 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48364 event pairs, 5274 based on Foata normal form. 0/5612 useless extension candidates. Maximal degree in co-relation 20785. Up to 5565 conditions per place. [2022-12-13 15:29:58,020 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 89 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2022-12-13 15:29:58,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 470 flow [2022-12-13 15:29:58,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:29:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:29:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1259 transitions. [2022-12-13 15:29:58,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4397485155431366 [2022-12-13 15:29:58,023 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1259 transitions. [2022-12-13 15:29:58,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1259 transitions. [2022-12-13 15:29:58,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:29:58,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1259 transitions. [2022-12-13 15:29:58,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 179.85714285714286) internal successors, (1259), 7 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:58,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:58,027 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:58,027 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 178 flow. Second operand 7 states and 1259 transitions. [2022-12-13 15:29:58,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 470 flow [2022-12-13 15:29:58,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 463 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:29:58,029 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 193 flow [2022-12-13 15:29:58,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=193, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2022-12-13 15:29:58,029 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -6 predicate places. [2022-12-13 15:29:58,030 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 193 flow [2022-12-13 15:29:58,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 167.25) internal successors, (1338), 8 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:58,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:29:58,030 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:29:58,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 15:29:58,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:58,231 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:29:58,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:29:58,231 INFO L85 PathProgramCache]: Analyzing trace with hash 819245761, now seen corresponding path program 1 times [2022-12-13 15:29:58,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:29:58,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5556805] [2022-12-13 15:29:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:29:58,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:58,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:29:58,232 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:29:58,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 15:29:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:29:58,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 15:29:58,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:29:58,371 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-12-13 15:29:58,372 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 7 case distinctions, treesize of input 49 treesize of output 66 [2022-12-13 15:29:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:29:58,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:29:58,459 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:29:58,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5556805] [2022-12-13 15:29:58,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5556805] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:29:58,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:29:58,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:29:58,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394263865] [2022-12-13 15:29:58,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:29:58,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:29:58,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:29:58,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:29:58,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:29:58,640 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 409 [2022-12-13 15:29:58,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:58,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:29:58,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 409 [2022-12-13 15:29:58,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:29:59,423 INFO L130 PetriNetUnfolder]: 7461/9824 cut-off events. [2022-12-13 15:29:59,423 INFO L131 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2022-12-13 15:29:59,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20128 conditions, 9824 events. 7461/9824 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 46519 event pairs, 5102 based on Foata normal form. 0/5423 useless extension candidates. Maximal degree in co-relation 20112. Up to 9794 conditions per place. [2022-12-13 15:29:59,460 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 52 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2022-12-13 15:29:59,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 54 transitions, 295 flow [2022-12-13 15:29:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:29:59,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:29:59,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2022-12-13 15:29:59,462 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45965770171149145 [2022-12-13 15:29:59,462 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2022-12-13 15:29:59,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2022-12-13 15:29:59,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:29:59,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2022-12-13 15:29:59,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:59,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:59,464 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:59,464 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 193 flow. Second operand 3 states and 564 transitions. [2022-12-13 15:29:59,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 54 transitions, 295 flow [2022-12-13 15:29:59,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 54 transitions, 278 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-12-13 15:29:59,466 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 174 flow [2022-12-13 15:29:59,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2022-12-13 15:29:59,466 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -10 predicate places. [2022-12-13 15:29:59,466 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 174 flow [2022-12-13 15:29:59,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:29:59,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:29:59,467 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:29:59,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 15:29:59,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:59,668 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:29:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:29:59,669 INFO L85 PathProgramCache]: Analyzing trace with hash 819245762, now seen corresponding path program 1 times [2022-12-13 15:29:59,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:29:59,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910077974] [2022-12-13 15:29:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:29:59,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:29:59,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:29:59,674 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:29:59,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 15:29:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:29:59,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 15:29:59,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:29:59,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:29:59,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:29:59,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:29:59,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:29:59,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:29:59,930 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-12-13 15:29:59,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-12-13 15:29:59,958 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 15:29:59,958 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 31 treesize of output 27 [2022-12-13 15:30:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:30:00,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:30:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:30:00,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:30:00,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910077974] [2022-12-13 15:30:00,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910077974] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:30:00,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:30:00,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 15:30:00,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114077322] [2022-12-13 15:30:00,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:30:00,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:30:00,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:30:00,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:30:00,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:30:01,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 15:30:01,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 174 flow. Second operand has 8 states, 8 states have (on average 164.25) internal successors, (1314), 8 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) [2022-12-13 15:30:01,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:30:01,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 15:30:01,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:30:02,819 INFO L130 PetriNetUnfolder]: 7211/9484 cut-off events. [2022-12-13 15:30:02,819 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2022-12-13 15:30:02,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19440 conditions, 9484 events. 7211/9484 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 44708 event pairs, 4930 based on Foata normal form. 0/5344 useless extension candidates. Maximal degree in co-relation 19425. Up to 5230 conditions per place. [2022-12-13 15:30:02,854 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 86 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2022-12-13 15:30:02,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 90 transitions, 432 flow [2022-12-13 15:30:02,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:30:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:30:02,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 904 transitions. [2022-12-13 15:30:02,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44205378973105136 [2022-12-13 15:30:02,857 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 904 transitions. [2022-12-13 15:30:02,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 904 transitions. [2022-12-13 15:30:02,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:30:02,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 904 transitions. [2022-12-13 15:30:02,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.8) internal successors, (904), 5 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:02,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:02,861 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:02,861 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 174 flow. Second operand 5 states and 904 transitions. [2022-12-13 15:30:02,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 90 transitions, 432 flow [2022-12-13 15:30:02,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 90 transitions, 431 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:30:02,863 INFO L231 Difference]: Finished difference. Result has 68 places, 52 transitions, 175 flow [2022-12-13 15:30:02,863 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=68, PETRI_TRANSITIONS=52} [2022-12-13 15:30:02,863 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2022-12-13 15:30:02,863 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 52 transitions, 175 flow [2022-12-13 15:30:02,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 164.25) internal successors, (1314), 8 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) [2022-12-13 15:30:02,864 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:30:02,864 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 15:30:02,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-13 15:30:03,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:30:03,066 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:30:03,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:30:03,067 INFO L85 PathProgramCache]: Analyzing trace with hash -373838314, now seen corresponding path program 2 times [2022-12-13 15:30:03,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:30:03,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763936651] [2022-12-13 15:30:03,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:30:03,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:30:03,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:30:03,071 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:30:03,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 15:30:03,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:30:03,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:30:03,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:30:03,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:30:03,384 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:30:03,384 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:30:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:30:03,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:30:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:30:04,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:30:04,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763936651] [2022-12-13 15:30:04,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763936651] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:30:04,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:30:04,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 15:30:04,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317353190] [2022-12-13 15:30:04,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:30:04,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:30:04,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:30:04,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:30:04,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:30:07,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 409 [2022-12-13 15:30:07,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 52 transitions, 175 flow. Second operand has 12 states, 12 states have (on average 168.0) internal successors, (2016), 12 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:07,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:30:07,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 409 [2022-12-13 15:30:07,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:30:15,602 INFO L130 PetriNetUnfolder]: 35239/46154 cut-off events. [2022-12-13 15:30:15,602 INFO L131 PetriNetUnfolder]: For 813/813 co-relation queries the response was YES. [2022-12-13 15:30:15,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95055 conditions, 46154 events. 35239/46154 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 1814. Compared 257346 event pairs, 24180 based on Foata normal form. 6/26460 useless extension candidates. Maximal degree in co-relation 95039. Up to 5226 conditions per place. [2022-12-13 15:30:15,811 INFO L137 encePairwiseOnDemand]: 404/409 looper letters, 367 selfloop transitions, 13 changer transitions 0/381 dead transitions. [2022-12-13 15:30:15,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 381 transitions, 1779 flow [2022-12-13 15:30:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:30:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:30:15,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2390 transitions. [2022-12-13 15:30:15,819 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.486960065199674 [2022-12-13 15:30:15,819 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2390 transitions. [2022-12-13 15:30:15,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2390 transitions. [2022-12-13 15:30:15,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:30:15,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2390 transitions. [2022-12-13 15:30:15,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 199.16666666666666) internal successors, (2390), 12 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:15,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 409.0) internal successors, (5317), 13 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:15,834 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 409.0) internal successors, (5317), 13 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:15,834 INFO L175 Difference]: Start difference. First operand has 68 places, 52 transitions, 175 flow. Second operand 12 states and 2390 transitions. [2022-12-13 15:30:15,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 381 transitions, 1779 flow [2022-12-13 15:30:15,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 381 transitions, 1774 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 15:30:15,844 INFO L231 Difference]: Finished difference. Result has 83 places, 60 transitions, 286 flow [2022-12-13 15:30:15,844 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=286, PETRI_PLACES=83, PETRI_TRANSITIONS=60} [2022-12-13 15:30:15,845 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 6 predicate places. [2022-12-13 15:30:15,845 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 60 transitions, 286 flow [2022-12-13 15:30:15,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 168.0) internal successors, (2016), 12 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:15,846 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:30:15,846 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 15:30:15,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 15:30:16,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:30:16,047 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:30:16,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:30:16,048 INFO L85 PathProgramCache]: Analyzing trace with hash -373838229, now seen corresponding path program 2 times [2022-12-13 15:30:16,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:30:16,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369879368] [2022-12-13 15:30:16,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:30:16,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:30:16,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:30:16,053 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:30:16,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 15:30:16,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 15:30:16,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:30:16,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 15:30:16,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:30:16,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:30:16,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:30:16,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:30:16,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:30:16,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:30:16,294 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-12-13 15:30:16,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-12-13 15:30:16,335 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-12-13 15:30:16,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 317 treesize of output 310 [2022-12-13 15:30:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 15:30:16,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:30:16,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:30:16,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369879368] [2022-12-13 15:30:16,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369879368] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:30:16,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:30:16,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:30:16,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338063157] [2022-12-13 15:30:16,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:30:16,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:30:16,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:30:16,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:30:16,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:30:16,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 409 [2022-12-13 15:30:16,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 60 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:16,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:30:16,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 409 [2022-12-13 15:30:16,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:30:19,535 INFO L130 PetriNetUnfolder]: 28838/38147 cut-off events. [2022-12-13 15:30:19,535 INFO L131 PetriNetUnfolder]: For 1042/1042 co-relation queries the response was YES. [2022-12-13 15:30:19,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77450 conditions, 38147 events. 28838/38147 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 1547. Compared 214332 event pairs, 19620 based on Foata normal form. 1600/22494 useless extension candidates. Maximal degree in co-relation 77427. Up to 38012 conditions per place. [2022-12-13 15:30:19,732 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 55 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2022-12-13 15:30:19,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 57 transitions, 370 flow [2022-12-13 15:30:19,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:30:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:30:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2022-12-13 15:30:19,734 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4612876935615322 [2022-12-13 15:30:19,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2022-12-13 15:30:19,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2022-12-13 15:30:19,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:30:19,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2022-12-13 15:30:19,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:19,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:19,738 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:19,738 INFO L175 Difference]: Start difference. First operand has 83 places, 60 transitions, 286 flow. Second operand 3 states and 566 transitions. [2022-12-13 15:30:19,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 57 transitions, 370 flow [2022-12-13 15:30:19,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 57 transitions, 343 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-12-13 15:30:19,740 INFO L231 Difference]: Finished difference. Result has 77 places, 57 transitions, 233 flow [2022-12-13 15:30:19,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=233, PETRI_PLACES=77, PETRI_TRANSITIONS=57} [2022-12-13 15:30:19,740 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2022-12-13 15:30:19,740 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 57 transitions, 233 flow [2022-12-13 15:30:19,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:19,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:30:19,741 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:30:19,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-12-13 15:30:19,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:30:19,942 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:30:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:30:19,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1315966046, now seen corresponding path program 1 times [2022-12-13 15:30:19,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:30:19,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45932454] [2022-12-13 15:30:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:30:19,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:30:19,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:30:19,947 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:30:19,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 15:30:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:30:20,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:30:20,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:30:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:30:20,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:30:20,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:30:20,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45932454] [2022-12-13 15:30:20,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45932454] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:30:20,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:30:20,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:30:20,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455109851] [2022-12-13 15:30:20,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:30:20,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:30:20,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:30:20,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:30:20,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:30:20,403 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 409 [2022-12-13 15:30:20,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 57 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 171.16666666666666) internal successors, (1027), 6 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:20,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:30:20,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 409 [2022-12-13 15:30:20,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:30:24,827 INFO L130 PetriNetUnfolder]: 43769/57605 cut-off events. [2022-12-13 15:30:24,827 INFO L131 PetriNetUnfolder]: For 370/370 co-relation queries the response was YES. [2022-12-13 15:30:25,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116959 conditions, 57605 events. 43769/57605 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 2263. Compared 336649 event pairs, 10125 based on Foata normal form. 0/31901 useless extension candidates. Maximal degree in co-relation 116936. Up to 39168 conditions per place. [2022-12-13 15:30:25,142 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 101 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2022-12-13 15:30:25,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 108 transitions, 559 flow [2022-12-13 15:30:25,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:30:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:30:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 944 transitions. [2022-12-13 15:30:25,145 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46161369193154034 [2022-12-13 15:30:25,145 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 944 transitions. [2022-12-13 15:30:25,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 944 transitions. [2022-12-13 15:30:25,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:30:25,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 944 transitions. [2022-12-13 15:30:25,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 188.8) internal successors, (944), 5 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:25,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:25,148 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:25,148 INFO L175 Difference]: Start difference. First operand has 77 places, 57 transitions, 233 flow. Second operand 5 states and 944 transitions. [2022-12-13 15:30:25,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 108 transitions, 559 flow [2022-12-13 15:30:25,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 108 transitions, 558 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:30:25,151 INFO L231 Difference]: Finished difference. Result has 82 places, 61 transitions, 268 flow [2022-12-13 15:30:25,151 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=82, PETRI_TRANSITIONS=61} [2022-12-13 15:30:25,151 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 5 predicate places. [2022-12-13 15:30:25,151 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 61 transitions, 268 flow [2022-12-13 15:30:25,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.16666666666666) internal successors, (1027), 6 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:25,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:30:25,152 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:30:25,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 15:30:25,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:30:25,353 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:30:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:30:25,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1316180232, now seen corresponding path program 1 times [2022-12-13 15:30:25,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:30:25,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757760555] [2022-12-13 15:30:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:30:25,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:30:25,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:30:25,358 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:30:25,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 15:30:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:30:25,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 15:30:25,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:30:25,529 INFO L321 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2022-12-13 15:30:25,530 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 5 case distinctions, treesize of input 36 treesize of output 55 [2022-12-13 15:30:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:30:25,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:30:25,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:30:25,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757760555] [2022-12-13 15:30:25,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757760555] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:30:25,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:30:25,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:30:25,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613249135] [2022-12-13 15:30:25,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:30:25,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:30:25,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:30:25,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:30:25,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:30:25,643 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 409 [2022-12-13 15:30:25,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 61 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:25,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:30:25,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 409 [2022-12-13 15:30:25,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:30:30,200 INFO L130 PetriNetUnfolder]: 41645/55022 cut-off events. [2022-12-13 15:30:30,200 INFO L131 PetriNetUnfolder]: For 16057/16057 co-relation queries the response was YES. [2022-12-13 15:30:30,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130183 conditions, 55022 events. 41645/55022 cut-off events. For 16057/16057 co-relation queries the response was YES. Maximal size of possible extension queue 2217. Compared 321972 event pairs, 27450 based on Foata normal form. 0/38732 useless extension candidates. Maximal degree in co-relation 130157. Up to 54860 conditions per place. [2022-12-13 15:30:30,544 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 57 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2022-12-13 15:30:30,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 59 transitions, 380 flow [2022-12-13 15:30:30,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:30:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:30:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2022-12-13 15:30:30,546 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4474327628361858 [2022-12-13 15:30:30,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2022-12-13 15:30:30,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2022-12-13 15:30:30,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:30:30,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2022-12-13 15:30:30,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:30,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:30,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:30,548 INFO L175 Difference]: Start difference. First operand has 82 places, 61 transitions, 268 flow. Second operand 3 states and 549 transitions. [2022-12-13 15:30:30,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 59 transitions, 380 flow [2022-12-13 15:30:30,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 59 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:30:30,558 INFO L231 Difference]: Finished difference. Result has 80 places, 59 transitions, 260 flow [2022-12-13 15:30:30,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2022-12-13 15:30:30,558 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-12-13 15:30:30,559 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 260 flow [2022-12-13 15:30:30,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:30,559 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:30:30,559 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:30:30,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 15:30:30,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:30:30,760 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:30:30,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:30:30,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1316180231, now seen corresponding path program 1 times [2022-12-13 15:30:30,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:30:30,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648256248] [2022-12-13 15:30:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:30:30,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:30:30,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:30:30,765 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:30:30,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 15:30:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:30:30,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 15:30:30,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:30:30,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:30:30,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:30:30,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:30:31,012 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-12-13 15:30:31,012 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-12-13 15:30:31,028 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 18 treesize of output 16 [2022-12-13 15:30:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:30:31,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:30:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:30:31,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:30:31,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648256248] [2022-12-13 15:30:31,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648256248] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:30:31,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:30:31,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 15:30:31,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116441854] [2022-12-13 15:30:31,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:30:31,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:30:31,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:30:31,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:30:31,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:30:32,718 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 15:30:32,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 260 flow. Second operand has 8 states, 8 states have (on average 164.75) internal successors, (1318), 8 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:32,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:30:32,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 15:30:32,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:30:37,933 INFO L130 PetriNetUnfolder]: 40727/53645 cut-off events. [2022-12-13 15:30:37,933 INFO L131 PetriNetUnfolder]: For 12655/12655 co-relation queries the response was YES. [2022-12-13 15:30:38,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124928 conditions, 53645 events. 40727/53645 cut-off events. For 12655/12655 co-relation queries the response was YES. Maximal size of possible extension queue 2181. Compared 311458 event pairs, 26784 based on Foata normal form. 0/39161 useless extension candidates. Maximal degree in co-relation 124901. Up to 47540 conditions per place. [2022-12-13 15:30:38,275 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 91 selfloop transitions, 3 changer transitions 0/95 dead transitions. [2022-12-13 15:30:38,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 95 transitions, 548 flow [2022-12-13 15:30:38,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:30:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:30:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 894 transitions. [2022-12-13 15:30:38,278 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4371638141809291 [2022-12-13 15:30:38,278 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 894 transitions. [2022-12-13 15:30:38,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 894 transitions. [2022-12-13 15:30:38,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:30:38,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 894 transitions. [2022-12-13 15:30:38,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 178.8) internal successors, (894), 5 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:38,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:38,281 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:38,281 INFO L175 Difference]: Start difference. First operand has 80 places, 59 transitions, 260 flow. Second operand 5 states and 894 transitions. [2022-12-13 15:30:38,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 95 transitions, 548 flow [2022-12-13 15:30:38,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 95 transitions, 547 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:30:38,291 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 261 flow [2022-12-13 15:30:38,291 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2022-12-13 15:30:38,291 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2022-12-13 15:30:38,291 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 261 flow [2022-12-13 15:30:38,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 164.75) internal successors, (1318), 8 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:38,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:30:38,292 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:30:38,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-12-13 15:30:38,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:30:38,493 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:30:38,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:30:38,494 INFO L85 PathProgramCache]: Analyzing trace with hash 2140245210, now seen corresponding path program 1 times [2022-12-13 15:30:38,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:30:38,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066292355] [2022-12-13 15:30:38,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:30:38,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:30:38,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:30:38,498 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:30:38,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 15:30:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:30:38,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:30:38,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:30:38,745 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:30:38,745 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:30:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:30:38,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:30:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:30:39,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:30:39,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066292355] [2022-12-13 15:30:39,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066292355] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:30:39,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:30:39,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 15:30:39,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925832883] [2022-12-13 15:30:39,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:30:39,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:30:39,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:30:39,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:30:39,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:30:42,219 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 15:30:42,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 57 transitions, 261 flow. Second operand has 10 states, 10 states have (on average 164.6) internal successors, (1646), 10 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:42,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:30:42,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 15:30:42,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:30:50,140 INFO L130 PetriNetUnfolder]: 60131/77693 cut-off events. [2022-12-13 15:30:50,140 INFO L131 PetriNetUnfolder]: For 15355/15355 co-relation queries the response was YES. [2022-12-13 15:30:50,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181667 conditions, 77693 events. 60131/77693 cut-off events. For 15355/15355 co-relation queries the response was YES. Maximal size of possible extension queue 2933. Compared 462492 event pairs, 11511 based on Foata normal form. 1548/58928 useless extension candidates. Maximal degree in co-relation 181639. Up to 26965 conditions per place. [2022-12-13 15:30:50,655 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 131 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2022-12-13 15:30:50,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 145 transitions, 763 flow [2022-12-13 15:30:50,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:30:50,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:30:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1435 transitions. [2022-12-13 15:30:50,659 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43856968215158926 [2022-12-13 15:30:50,659 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1435 transitions. [2022-12-13 15:30:50,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1435 transitions. [2022-12-13 15:30:50,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:30:50,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1435 transitions. [2022-12-13 15:30:50,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.375) internal successors, (1435), 8 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:50,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:50,664 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:50,664 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 261 flow. Second operand 8 states and 1435 transitions. [2022-12-13 15:30:50,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 145 transitions, 763 flow [2022-12-13 15:30:50,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 145 transitions, 756 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 15:30:50,677 INFO L231 Difference]: Finished difference. Result has 90 places, 62 transitions, 329 flow [2022-12-13 15:30:50,677 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=329, PETRI_PLACES=90, PETRI_TRANSITIONS=62} [2022-12-13 15:30:50,677 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 13 predicate places. [2022-12-13 15:30:50,678 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 62 transitions, 329 flow [2022-12-13 15:30:50,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 164.6) internal successors, (1646), 10 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:50,678 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:30:50,678 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:30:50,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 15:30:50,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:30:50,879 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:30:50,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:30:50,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2128644883, now seen corresponding path program 1 times [2022-12-13 15:30:50,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:30:50,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850036539] [2022-12-13 15:30:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:30:50,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:30:50,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:30:50,884 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:30:50,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 15:30:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:30:51,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:30:51,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:30:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:30:51,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:30:51,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:30:51,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850036539] [2022-12-13 15:30:51,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850036539] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:30:51,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:30:51,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:30:51,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693313268] [2022-12-13 15:30:51,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:30:51,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:30:51,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:30:51,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:30:51,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:30:51,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 409 [2022-12-13 15:30:51,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 62 transitions, 329 flow. Second operand has 6 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:30:51,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:30:51,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 409 [2022-12-13 15:30:51,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:31:01,271 INFO L130 PetriNetUnfolder]: 85223/109949 cut-off events. [2022-12-13 15:31:01,271 INFO L131 PetriNetUnfolder]: For 98890/98998 co-relation queries the response was YES. [2022-12-13 15:31:01,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305242 conditions, 109949 events. 85223/109949 cut-off events. For 98890/98998 co-relation queries the response was YES. Maximal size of possible extension queue 4037. Compared 678990 event pairs, 14913 based on Foata normal form. 18/83255 useless extension candidates. Maximal degree in co-relation 305209. Up to 77868 conditions per place. [2022-12-13 15:31:02,214 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 101 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2022-12-13 15:31:02,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 108 transitions, 702 flow [2022-12-13 15:31:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:31:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:31:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 932 transitions. [2022-12-13 15:31:02,217 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4557457212713936 [2022-12-13 15:31:02,217 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 932 transitions. [2022-12-13 15:31:02,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 932 transitions. [2022-12-13 15:31:02,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:31:02,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 932 transitions. [2022-12-13 15:31:02,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 186.4) internal successors, (932), 5 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:02,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:02,221 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:02,221 INFO L175 Difference]: Start difference. First operand has 90 places, 62 transitions, 329 flow. Second operand 5 states and 932 transitions. [2022-12-13 15:31:02,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 108 transitions, 702 flow [2022-12-13 15:31:02,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 108 transitions, 675 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-12-13 15:31:02,698 INFO L231 Difference]: Finished difference. Result has 92 places, 63 transitions, 332 flow [2022-12-13 15:31:02,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=92, PETRI_TRANSITIONS=63} [2022-12-13 15:31:02,698 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2022-12-13 15:31:02,698 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 63 transitions, 332 flow [2022-12-13 15:31:02,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:02,698 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:31:02,699 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:31:02,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-12-13 15:31:02,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:31:02,900 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:31:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:31:02,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2128836240, now seen corresponding path program 1 times [2022-12-13 15:31:02,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:31:02,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807446796] [2022-12-13 15:31:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:31:02,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:31:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:31:02,905 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:31:02,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 15:31:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:31:03,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 15:31:03,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:31:03,124 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-12-13 15:31:03,124 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 4 case distinctions, treesize of input 18 treesize of output 36 [2022-12-13 15:31:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:31:03,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:31:03,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:31:03,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807446796] [2022-12-13 15:31:03,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807446796] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:31:03,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:31:03,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:31:03,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651255148] [2022-12-13 15:31:03,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:31:03,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:31:03,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:31:03,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:31:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:31:03,215 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 409 [2022-12-13 15:31:03,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 63 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:03,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:31:03,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 409 [2022-12-13 15:31:03,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:31:12,248 INFO L130 PetriNetUnfolder]: 74684/96800 cut-off events. [2022-12-13 15:31:12,249 INFO L131 PetriNetUnfolder]: For 106739/106739 co-relation queries the response was YES. [2022-12-13 15:31:12,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274373 conditions, 96800 events. 74684/96800 cut-off events. For 106739/106739 co-relation queries the response was YES. Maximal size of possible extension queue 3550. Compared 572863 event pairs, 49302 based on Foata normal form. 0/80384 useless extension candidates. Maximal degree in co-relation 274339. Up to 96611 conditions per place. [2022-12-13 15:31:13,089 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 59 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2022-12-13 15:31:13,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 61 transitions, 448 flow [2022-12-13 15:31:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:31:13,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:31:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2022-12-13 15:31:13,091 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4441727791361043 [2022-12-13 15:31:13,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2022-12-13 15:31:13,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2022-12-13 15:31:13,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:31:13,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2022-12-13 15:31:13,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:13,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:13,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:13,094 INFO L175 Difference]: Start difference. First operand has 92 places, 63 transitions, 332 flow. Second operand 3 states and 545 transitions. [2022-12-13 15:31:13,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 61 transitions, 448 flow [2022-12-13 15:31:13,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 61 transitions, 438 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 15:31:13,201 INFO L231 Difference]: Finished difference. Result has 89 places, 61 transitions, 320 flow [2022-12-13 15:31:13,201 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=89, PETRI_TRANSITIONS=61} [2022-12-13 15:31:13,201 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 12 predicate places. [2022-12-13 15:31:13,201 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 61 transitions, 320 flow [2022-12-13 15:31:13,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:13,202 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:31:13,202 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:31:13,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 15:31:13,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:31:13,403 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:31:13,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:31:13,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2128836242, now seen corresponding path program 1 times [2022-12-13 15:31:13,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:31:13,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035402006] [2022-12-13 15:31:13,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:31:13,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:31:13,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:31:13,409 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:31:13,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 15:31:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:31:13,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 15:31:13,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:31:13,669 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:31:13,669 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:31:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:31:13,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:31:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:31:14,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:31:14,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035402006] [2022-12-13 15:31:14,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035402006] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:31:14,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:31:14,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 15:31:14,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312875087] [2022-12-13 15:31:14,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:31:14,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:31:14,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:31:14,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:31:14,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:31:14,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 15:31:14,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 61 transitions, 320 flow. Second operand has 8 states, 8 states have (on average 165.25) internal successors, (1322), 8 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:14,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:31:14,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 15:31:14,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:31:23,282 INFO L130 PetriNetUnfolder]: 65873/85379 cut-off events. [2022-12-13 15:31:23,282 INFO L131 PetriNetUnfolder]: For 84095/84095 co-relation queries the response was YES. [2022-12-13 15:31:23,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238841 conditions, 85379 events. 65873/85379 cut-off events. For 84095/84095 co-relation queries the response was YES. Maximal size of possible extension queue 3059. Compared 495769 event pairs, 43587 based on Foata normal form. 0/73942 useless extension candidates. Maximal degree in co-relation 238807. Up to 75796 conditions per place. [2022-12-13 15:31:23,996 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 95 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2022-12-13 15:31:23,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 99 transitions, 664 flow [2022-12-13 15:31:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:31:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:31:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 886 transitions. [2022-12-13 15:31:23,999 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4332518337408313 [2022-12-13 15:31:23,999 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 886 transitions. [2022-12-13 15:31:23,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 886 transitions. [2022-12-13 15:31:24,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:31:24,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 886 transitions. [2022-12-13 15:31:24,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:24,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:24,003 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:24,003 INFO L175 Difference]: Start difference. First operand has 89 places, 61 transitions, 320 flow. Second operand 5 states and 886 transitions. [2022-12-13 15:31:24,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 99 transitions, 664 flow [2022-12-13 15:31:24,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 99 transitions, 663 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:31:24,133 INFO L231 Difference]: Finished difference. Result has 90 places, 59 transitions, 321 flow [2022-12-13 15:31:24,133 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=90, PETRI_TRANSITIONS=59} [2022-12-13 15:31:24,133 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 13 predicate places. [2022-12-13 15:31:24,133 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 59 transitions, 321 flow [2022-12-13 15:31:24,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 165.25) internal successors, (1322), 8 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:24,134 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:31:24,134 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:31:24,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 15:31:24,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:31:24,335 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:31:24,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:31:24,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1563485495, now seen corresponding path program 1 times [2022-12-13 15:31:24,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:31:24,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037672567] [2022-12-13 15:31:24,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:31:24,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:31:24,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:31:24,340 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:31:24,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 15:31:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:31:24,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:31:24,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:31:24,607 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:31:24,607 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:31:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:31:24,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:31:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:31:25,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:31:25,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037672567] [2022-12-13 15:31:25,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037672567] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:31:25,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:31:25,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 15:31:25,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532510370] [2022-12-13 15:31:25,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:31:25,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:31:25,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:31:25,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:31:25,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:31:27,471 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 15:31:27,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 59 transitions, 321 flow. Second operand has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:27,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:31:27,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 15:31:27,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:31:40,072 INFO L130 PetriNetUnfolder]: 98849/126239 cut-off events. [2022-12-13 15:31:40,072 INFO L131 PetriNetUnfolder]: For 123812/123812 co-relation queries the response was YES. [2022-12-13 15:31:40,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351686 conditions, 126239 events. 98849/126239 cut-off events. For 123812/123812 co-relation queries the response was YES. Maximal size of possible extension queue 4131. Compared 762670 event pairs, 23391 based on Foata normal form. 2628/113522 useless extension candidates. Maximal degree in co-relation 351651. Up to 47638 conditions per place. [2022-12-13 15:31:41,275 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 145 selfloop transitions, 13 changer transitions 0/159 dead transitions. [2022-12-13 15:31:41,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 159 transitions, 1050 flow [2022-12-13 15:31:41,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:31:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:31:41,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1419 transitions. [2022-12-13 15:31:41,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.433679706601467 [2022-12-13 15:31:41,280 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1419 transitions. [2022-12-13 15:31:41,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1419 transitions. [2022-12-13 15:31:41,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:31:41,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1419 transitions. [2022-12-13 15:31:41,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 177.375) internal successors, (1419), 8 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:41,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:41,287 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:41,288 INFO L175 Difference]: Start difference. First operand has 90 places, 59 transitions, 321 flow. Second operand 8 states and 1419 transitions. [2022-12-13 15:31:41,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 159 transitions, 1050 flow [2022-12-13 15:31:41,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 159 transitions, 1043 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 15:31:41,443 INFO L231 Difference]: Finished difference. Result has 99 places, 64 transitions, 389 flow [2022-12-13 15:31:41,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=389, PETRI_PLACES=99, PETRI_TRANSITIONS=64} [2022-12-13 15:31:41,444 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 22 predicate places. [2022-12-13 15:31:41,444 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 64 transitions, 389 flow [2022-12-13 15:31:41,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:41,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:31:41,444 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:31:41,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 15:31:41,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:31:41,646 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:31:41,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:31:41,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1569408589, now seen corresponding path program 1 times [2022-12-13 15:31:41,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:31:41,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600000698] [2022-12-13 15:31:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:31:41,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:31:41,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:31:41,651 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:31:41,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 15:31:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:31:41,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:31:41,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:31:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:31:42,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:31:42,225 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 [2022-12-13 15:31:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:31:42,284 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:31:42,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600000698] [2022-12-13 15:31:42,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600000698] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:31:42,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:31:42,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 15:31:42,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697218553] [2022-12-13 15:31:42,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:31:42,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:31:42,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:31:42,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:31:42,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:31:44,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 15:31:44,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 64 transitions, 389 flow. Second operand has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:31:44,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:31:44,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 15:31:44,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:32:02,001 INFO L130 PetriNetUnfolder]: 127811/167828 cut-off events. [2022-12-13 15:32:02,001 INFO L131 PetriNetUnfolder]: For 340117/340117 co-relation queries the response was YES. [2022-12-13 15:32:03,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563515 conditions, 167828 events. 127811/167828 cut-off events. For 340117/340117 co-relation queries the response was YES. Maximal size of possible extension queue 3449. Compared 994822 event pairs, 63045 based on Foata normal form. 0/161564 useless extension candidates. Maximal degree in co-relation 563475. Up to 101297 conditions per place. [2022-12-13 15:32:03,699 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 172 selfloop transitions, 14 changer transitions 0/186 dead transitions. [2022-12-13 15:32:03,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 186 transitions, 1349 flow [2022-12-13 15:32:03,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:32:03,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:32:03,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1586 transitions. [2022-12-13 15:32:03,703 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4308611790274382 [2022-12-13 15:32:03,703 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1586 transitions. [2022-12-13 15:32:03,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1586 transitions. [2022-12-13 15:32:03,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:32:03,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1586 transitions. [2022-12-13 15:32:03,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.22222222222223) internal successors, (1586), 9 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) [2022-12-13 15:32:03,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 409.0) internal successors, (4090), 10 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:03,709 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 409.0) internal successors, (4090), 10 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:03,709 INFO L175 Difference]: Start difference. First operand has 99 places, 64 transitions, 389 flow. Second operand 9 states and 1586 transitions. [2022-12-13 15:32:03,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 186 transitions, 1349 flow [2022-12-13 15:32:04,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 186 transitions, 1302 flow, removed 16 selfloop flow, removed 3 redundant places. [2022-12-13 15:32:04,399 INFO L231 Difference]: Finished difference. Result has 106 places, 68 transitions, 428 flow [2022-12-13 15:32:04,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=428, PETRI_PLACES=106, PETRI_TRANSITIONS=68} [2022-12-13 15:32:04,400 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 29 predicate places. [2022-12-13 15:32:04,400 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 68 transitions, 428 flow [2022-12-13 15:32:04,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:04,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:32:04,400 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:32:04,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-12-13 15:32:04,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:32:04,601 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:32:04,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:32:04,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1407029954, now seen corresponding path program 1 times [2022-12-13 15:32:04,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:32:04,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059968621] [2022-12-13 15:32:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:32:04,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:32:04,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:32:04,606 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:32:04,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 15:32:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:32:04,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:32:04,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:32:04,844 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:32:04,844 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:32:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:32:04,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:32:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:32:05,331 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:32:05,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059968621] [2022-12-13 15:32:05,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059968621] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:32:05,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:32:05,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 15:32:05,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152206243] [2022-12-13 15:32:05,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:32:05,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:32:05,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:32:05,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:32:05,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:32:07,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 15:32:07,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 68 transitions, 428 flow. Second operand has 10 states, 10 states have (on average 165.2) internal successors, (1652), 10 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:07,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:32:07,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 15:32:07,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:32:37,550 INFO L130 PetriNetUnfolder]: 201899/260708 cut-off events. [2022-12-13 15:32:37,551 INFO L131 PetriNetUnfolder]: For 534691/534691 co-relation queries the response was YES. [2022-12-13 15:32:39,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922809 conditions, 260708 events. 201899/260708 cut-off events. For 534691/534691 co-relation queries the response was YES. Maximal size of possible extension queue 4900. Compared 1542080 event pairs, 46503 based on Foata normal form. 25056/285764 useless extension candidates. Maximal degree in co-relation 922767. Up to 86887 conditions per place. [2022-12-13 15:32:40,436 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 183 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2022-12-13 15:32:40,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 200 transitions, 1496 flow [2022-12-13 15:32:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:32:40,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:32:40,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1426 transitions. [2022-12-13 15:32:40,441 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4358190709046455 [2022-12-13 15:32:40,441 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1426 transitions. [2022-12-13 15:32:40,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1426 transitions. [2022-12-13 15:32:40,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:32:40,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1426 transitions. [2022-12-13 15:32:40,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.25) internal successors, (1426), 8 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:40,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:40,446 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:40,446 INFO L175 Difference]: Start difference. First operand has 106 places, 68 transitions, 428 flow. Second operand 8 states and 1426 transitions. [2022-12-13 15:32:40,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 200 transitions, 1496 flow [2022-12-13 15:32:41,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 200 transitions, 1477 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-12-13 15:32:41,776 INFO L231 Difference]: Finished difference. Result has 114 places, 73 transitions, 512 flow [2022-12-13 15:32:41,776 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=512, PETRI_PLACES=114, PETRI_TRANSITIONS=73} [2022-12-13 15:32:41,776 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 37 predicate places. [2022-12-13 15:32:41,777 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 73 transitions, 512 flow [2022-12-13 15:32:41,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.2) internal successors, (1652), 10 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:41,777 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:32:41,777 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:32:41,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-13 15:32:41,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:32:41,978 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:32:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:32:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1258965854, now seen corresponding path program 2 times [2022-12-13 15:32:41,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:32:41,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697095125] [2022-12-13 15:32:41,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:32:41,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:32:41,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:32:41,981 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:32:41,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 15:32:42,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:32:42,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:32:42,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 15:32:42,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:32:42,233 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:32:42,234 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:32:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:32:42,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:32:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:32:43,570 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:32:43,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697095125] [2022-12-13 15:32:43,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697095125] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:32:43,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:32:43,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 15:32:43,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451685939] [2022-12-13 15:32:43,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:32:43,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:32:43,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:32:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:32:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:32:56,146 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 409 [2022-12-13 15:32:56,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 73 transitions, 512 flow. Second operand has 18 states, 18 states have (on average 157.22222222222223) internal successors, (2830), 18 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:32:56,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:32:56,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 409 [2022-12-13 15:32:56,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:33:37,181 INFO L130 PetriNetUnfolder]: 183763/238130 cut-off events. [2022-12-13 15:33:37,181 INFO L131 PetriNetUnfolder]: For 831633/857008 co-relation queries the response was YES. [2022-12-13 15:33:39,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978905 conditions, 238130 events. 183763/238130 cut-off events. For 831633/857008 co-relation queries the response was YES. Maximal size of possible extension queue 5097. Compared 1436278 event pairs, 70261 based on Foata normal form. 26881/265003 useless extension candidates. Maximal degree in co-relation 978858. Up to 105814 conditions per place. [2022-12-13 15:33:40,489 INFO L137 encePairwiseOnDemand]: 401/409 looper letters, 475 selfloop transitions, 24 changer transitions 0/501 dead transitions. [2022-12-13 15:33:40,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 501 transitions, 4006 flow [2022-12-13 15:33:40,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 15:33:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 15:33:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3275 transitions. [2022-12-13 15:33:40,499 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4214386822802728 [2022-12-13 15:33:40,499 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3275 transitions. [2022-12-13 15:33:40,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3275 transitions. [2022-12-13 15:33:40,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:33:40,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3275 transitions. [2022-12-13 15:33:40,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 172.3684210526316) internal successors, (3275), 19 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:40,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 409.0) internal successors, (8180), 20 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:40,514 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 409.0) internal successors, (8180), 20 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:40,514 INFO L175 Difference]: Start difference. First operand has 114 places, 73 transitions, 512 flow. Second operand 19 states and 3275 transitions. [2022-12-13 15:33:40,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 501 transitions, 4006 flow [2022-12-13 15:33:44,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 501 transitions, 3784 flow, removed 98 selfloop flow, removed 3 redundant places. [2022-12-13 15:33:44,376 INFO L231 Difference]: Finished difference. Result has 134 places, 87 transitions, 654 flow [2022-12-13 15:33:44,377 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=654, PETRI_PLACES=134, PETRI_TRANSITIONS=87} [2022-12-13 15:33:44,377 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 57 predicate places. [2022-12-13 15:33:44,377 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 87 transitions, 654 flow [2022-12-13 15:33:44,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 157.22222222222223) internal successors, (2830), 18 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:33:44,377 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:33:44,377 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 15:33:44,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-13 15:33:44,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:33:44,578 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:33:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:33:44,579 INFO L85 PathProgramCache]: Analyzing trace with hash 545178262, now seen corresponding path program 3 times [2022-12-13 15:33:44,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:33:44,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569843249] [2022-12-13 15:33:44,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:33:44,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:33:44,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:33:44,583 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:33:44,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 15:33:44,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 15:33:44,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:33:44,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 15:33:44,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:33:44,956 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:33:44,957 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:33:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:45,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:33:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:33:47,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:33:47,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569843249] [2022-12-13 15:33:47,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569843249] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:33:47,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:33:47,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 15:33:47,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695319828] [2022-12-13 15:33:47,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:33:47,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:33:47,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:33:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:33:47,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:34:08,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 409 [2022-12-13 15:34:08,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 87 transitions, 654 flow. Second operand has 24 states, 24 states have (on average 168.0) internal successors, (4032), 24 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:34:08,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:34:08,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 409 [2022-12-13 15:34:08,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:35:45,005 INFO L130 PetriNetUnfolder]: 425599/550178 cut-off events. [2022-12-13 15:35:45,005 INFO L131 PetriNetUnfolder]: For 1979038/2037113 co-relation queries the response was YES. [2022-12-13 15:35:49,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2290384 conditions, 550178 events. 425599/550178 cut-off events. For 1979038/2037113 co-relation queries the response was YES. Maximal size of possible extension queue 7268. Compared 3370909 event pairs, 304837 based on Foata normal form. 58087/608242 useless extension candidates. Maximal degree in co-relation 2290332. Up to 96633 conditions per place. [2022-12-13 15:35:52,136 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 1093 selfloop transitions, 24 changer transitions 0/1119 dead transitions. [2022-12-13 15:35:52,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 1119 transitions, 8901 flow [2022-12-13 15:35:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 15:35:52,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 15:35:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4696 transitions. [2022-12-13 15:35:52,143 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47840260798696005 [2022-12-13 15:35:52,143 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4696 transitions. [2022-12-13 15:35:52,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4696 transitions. [2022-12-13 15:35:52,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:35:52,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4696 transitions. [2022-12-13 15:35:52,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 195.66666666666666) internal successors, (4696), 24 states have internal predecessors, (4696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:52,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 409.0) internal successors, (10225), 25 states have internal predecessors, (10225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:52,155 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 409.0) internal successors, (10225), 25 states have internal predecessors, (10225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:35:52,155 INFO L175 Difference]: Start difference. First operand has 134 places, 87 transitions, 654 flow. Second operand 24 states and 4696 transitions. [2022-12-13 15:35:52,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 1119 transitions, 8901 flow [2022-12-13 15:36:07,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 1119 transitions, 8818 flow, removed 24 selfloop flow, removed 6 redundant places. [2022-12-13 15:36:07,415 INFO L231 Difference]: Finished difference. Result has 164 places, 100 transitions, 800 flow [2022-12-13 15:36:07,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=800, PETRI_PLACES=164, PETRI_TRANSITIONS=100} [2022-12-13 15:36:07,416 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 87 predicate places. [2022-12-13 15:36:07,416 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 100 transitions, 800 flow [2022-12-13 15:36:07,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 168.0) internal successors, (4032), 24 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:07,416 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:36:07,416 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 15:36:07,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-12-13 15:36:07,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:36:07,617 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:36:07,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:36:07,618 INFO L85 PathProgramCache]: Analyzing trace with hash -451279514, now seen corresponding path program 3 times [2022-12-13 15:36:07,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:36:07,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500242130] [2022-12-13 15:36:07,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:36:07,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:36:07,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:36:07,623 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:36:07,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-13 15:36:07,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 15:36:07,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:36:07,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 15:36:07,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:36:07,978 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:36:07,978 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:36:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:08,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:36:08,352 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 8 treesize of output 6 [2022-12-13 15:36:08,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-13 15:36:08,382 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 15:36:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:36:09,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:36:09,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500242130] [2022-12-13 15:36:09,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500242130] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:36:09,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:36:09,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-12-13 15:36:09,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103834374] [2022-12-13 15:36:09,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:36:09,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:36:09,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:36:09,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:36:09,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:36:26,593 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 409 [2022-12-13 15:36:26,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 100 transitions, 800 flow. Second operand has 21 states, 21 states have (on average 161.23809523809524) internal successors, (3386), 21 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:36:26,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:36:26,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 409 [2022-12-13 15:36:26,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:37:58,514 INFO L130 PetriNetUnfolder]: 432953/560652 cut-off events. [2022-12-13 15:37:58,514 INFO L131 PetriNetUnfolder]: For 2011563/2071226 co-relation queries the response was YES. [2022-12-13 15:38:05,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2317842 conditions, 560652 events. 432953/560652 cut-off events. For 2011563/2071226 co-relation queries the response was YES. Maximal size of possible extension queue 7381. Compared 3498543 event pairs, 233253 based on Foata normal form. 61169/621817 useless extension candidates. Maximal degree in co-relation 2317778. Up to 404383 conditions per place. [2022-12-13 15:38:08,061 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 595 selfloop transitions, 31 changer transitions 0/628 dead transitions. [2022-12-13 15:38:08,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 628 transitions, 4870 flow [2022-12-13 15:38:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 15:38:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 15:38:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3907 transitions. [2022-12-13 15:38:08,068 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43420760168926426 [2022-12-13 15:38:08,068 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3907 transitions. [2022-12-13 15:38:08,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3907 transitions. [2022-12-13 15:38:08,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:38:08,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3907 transitions. [2022-12-13 15:38:08,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 177.5909090909091) internal successors, (3907), 22 states have internal predecessors, (3907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:08,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 409.0) internal successors, (9407), 23 states have internal predecessors, (9407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:08,078 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 409.0) internal successors, (9407), 23 states have internal predecessors, (9407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:08,078 INFO L175 Difference]: Start difference. First operand has 164 places, 100 transitions, 800 flow. Second operand 22 states and 3907 transitions. [2022-12-13 15:38:08,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 628 transitions, 4870 flow [2022-12-13 15:38:52,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 628 transitions, 4822 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-12-13 15:38:52,486 INFO L231 Difference]: Finished difference. Result has 183 places, 113 transitions, 987 flow [2022-12-13 15:38:52,486 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=987, PETRI_PLACES=183, PETRI_TRANSITIONS=113} [2022-12-13 15:38:52,487 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 106 predicate places. [2022-12-13 15:38:52,487 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 113 transitions, 987 flow [2022-12-13 15:38:52,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 161.23809523809524) internal successors, (3386), 21 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:38:52,487 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:38:52,487 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:38:52,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 15:38:52,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:38:52,689 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 15:38:52,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:38:52,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1120406509, now seen corresponding path program 2 times [2022-12-13 15:38:52,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:38:52,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105260822] [2022-12-13 15:38:52,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:38:52,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:38:52,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:38:52,695 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 15:38:52,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bdb3631-5b0b-4dbe-998d-cb571e932321/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-13 15:38:52,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:38:52,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:38:52,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 15:38:52,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:38:52,996 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:38:52,996 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:38:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:38:53,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:38:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:38:54,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:38:54,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105260822] [2022-12-13 15:38:54,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105260822] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:38:54,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:38:54,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 15:38:54,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56547007] [2022-12-13 15:38:54,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:38:54,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:38:54,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:38:54,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:38:54,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:39:04,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 409 [2022-12-13 15:39:04,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 113 transitions, 987 flow. Second operand has 18 states, 18 states have (on average 157.44444444444446) internal successors, (2834), 18 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:39:04,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:39:04,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 409 [2022-12-13 15:39:04,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand