./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 19:52:21,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:52:21,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:52:21,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:52:21,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:52:21,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:52:21,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:52:21,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:52:21,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:52:21,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:52:21,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:52:21,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:52:21,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:52:21,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:52:21,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:52:21,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:52:21,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:52:21,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:52:21,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:52:21,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:52:21,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:52:21,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:52:21,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:52:21,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:52:21,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:52:21,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:52:21,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:52:21,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:52:21,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:52:21,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:52:21,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:52:21,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:52:21,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:52:21,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:52:21,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:52:21,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:52:21,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:52:21,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:52:21,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:52:21,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:52:21,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:52:21,069 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 19:52:21,090 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:52:21,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:52:21,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:52:21,091 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:52:21,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:52:21,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:52:21,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:52:21,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:52:21,093 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:52:21,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:52:21,093 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:52:21,094 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:52:21,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:52:21,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:52:21,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:52:21,094 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:52:21,095 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:52:21,095 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:52:21,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:52:21,095 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:52:21,095 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:52:21,095 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:52:21,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:52:21,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:52:21,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:52:21,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:52:21,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:52:21,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:52:21,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:52:21,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:52:21,097 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:52:21,097 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:52:21,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:52:21,097 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:52:21,097 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_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c [2022-12-13 19:52:21,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:52:21,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:52:21,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:52:21,280 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:52:21,281 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:52:21,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-12-13 19:52:23,817 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:52:23,974 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:52:23,974 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-12-13 19:52:23,980 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/data/c007b4dd3/1b40116b7a5d455bb02033868b98ea5e/FLAGd7dc52127 [2022-12-13 19:52:24,388 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/data/c007b4dd3/1b40116b7a5d455bb02033868b98ea5e [2022-12-13 19:52:24,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:52:24,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:52:24,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:52:24,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:52:24,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:52:24,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:52:24" (1/1) ... [2022-12-13 19:52:24,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@751bd69e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:24, skipping insertion in model container [2022-12-13 19:52:24,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:52:24" (1/1) ... [2022-12-13 19:52:24,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:52:24,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:52:24,542 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:24,543 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:24,546 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:24,547 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:24,549 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:24,550 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:24,557 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_88b6966f-b1d5-490a-a3b7-6530f3b417e3/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2022-12-13 19:52:24,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:52:24,576 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-13 19:52:24,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@45972069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:24, skipping insertion in model container [2022-12-13 19:52:24,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:52:24,577 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 19:52:24,578 INFO L158 Benchmark]: Toolchain (without parser) took 181.83ms. Allocated memory is still 138.4MB. Free memory was 104.7MB in the beginning and 94.7MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 19:52:24,578 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 138.4MB. Free memory is still 81.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:52:24,579 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.50ms. Allocated memory is still 138.4MB. Free memory was 104.5MB in the beginning and 94.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 19:52:24,580 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 138.4MB. Free memory is still 81.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 178.50ms. Allocated memory is still 138.4MB. Free memory was 104.5MB in the beginning and 94.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 19:52:25,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:52:25,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:52:25,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:52:25,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:52:25,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:52:25,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:52:25,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:52:25,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:52:25,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:52:25,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:52:25,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:52:25,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:52:25,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:52:25,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:52:25,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:52:25,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:52:25,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:52:25,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:52:25,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:52:25,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:52:25,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:52:25,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:52:25,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:52:25,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:52:25,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:52:25,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:52:25,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:52:25,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:52:25,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:52:25,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:52:25,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:52:25,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:52:25,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:52:25,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:52:25,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:52:25,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:52:25,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:52:25,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:52:25,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:52:25,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:52:25,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 19:52:25,881 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:52:25,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:52:25,881 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:52:25,882 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:52:25,882 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:52:25,883 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:52:25,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:52:25,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:52:25,883 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:52:25,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:52:25,884 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:52:25,884 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:52:25,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:52:25,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:52:25,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:52:25,885 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:52:25,885 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:52:25,885 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:52:25,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:52:25,886 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:52:25,886 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 19:52:25,886 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 19:52:25,886 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:52:25,886 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:52:25,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:52:25,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:52:25,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:52:25,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:52:25,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:52:25,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:52:25,888 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 19:52:25,888 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 19:52:25,888 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:52:25,888 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:52:25,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:52:25,888 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 19:52:25,889 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:52:25,889 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_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c [2022-12-13 19:52:26,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:52:26,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:52:26,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:52:26,127 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:52:26,128 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:52:26,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-12-13 19:52:28,744 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:52:28,893 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:52:28,894 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-12-13 19:52:28,900 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/data/40506ae54/96c1c4ddfe8f425fb188fb5e397feede/FLAGd85f1a311 [2022-12-13 19:52:28,912 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/data/40506ae54/96c1c4ddfe8f425fb188fb5e397feede [2022-12-13 19:52:28,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:52:28,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:52:28,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:52:28,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:52:28,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:52:28,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:52:28" (1/1) ... [2022-12-13 19:52:28,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22c8270b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:28, skipping insertion in model container [2022-12-13 19:52:28,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:52:28" (1/1) ... [2022-12-13 19:52:28,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:52:28,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:52:29,060 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:29,061 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:29,064 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:29,065 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:29,066 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:29,067 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:29,073 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_88b6966f-b1d5-490a-a3b7-6530f3b417e3/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2022-12-13 19:52:29,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:52:29,090 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 19:52:29,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:52:29,096 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:29,097 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:29,098 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:29,099 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:29,100 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:29,101 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:29,104 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_88b6966f-b1d5-490a-a3b7-6530f3b417e3/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2022-12-13 19:52:29,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:52:29,111 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:52:29,122 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:29,123 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:29,124 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:29,124 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:29,125 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:52:29,126 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:52:29,129 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_88b6966f-b1d5-490a-a3b7-6530f3b417e3/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2022-12-13 19:52:29,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:52:29,144 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:52:29,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:29 WrapperNode [2022-12-13 19:52:29,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:52:29,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:52:29,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:52:29,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:52:29,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:29" (1/1) ... [2022-12-13 19:52:29,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:29" (1/1) ... [2022-12-13 19:52:29,175 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 99 [2022-12-13 19:52:29,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:52:29,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:52:29,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:52:29,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:52:29,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:29" (1/1) ... [2022-12-13 19:52:29,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:29" (1/1) ... [2022-12-13 19:52:29,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:29" (1/1) ... [2022-12-13 19:52:29,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:29" (1/1) ... [2022-12-13 19:52:29,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:29" (1/1) ... [2022-12-13 19:52:29,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:29" (1/1) ... [2022-12-13 19:52:29,197 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:29" (1/1) ... [2022-12-13 19:52:29,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:29" (1/1) ... [2022-12-13 19:52:29,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:52:29,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:52:29,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:52:29,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:52:29,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:29" (1/1) ... [2022-12-13 19:52:29,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:52:29,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:29,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:52:29,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:52:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:52:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 19:52:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:52:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 19:52:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 19:52:29,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 19:52:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 19:52:29,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 19:52:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 19:52:29,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 19:52:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 19:52:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 19:52:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 19:52:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:52:29,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:52:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:52:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 19:52:29,264 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 19:52:29,364 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:52:29,365 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:52:29,771 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:52:29,841 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:52:29,841 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 19:52:29,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:52:29 BoogieIcfgContainer [2022-12-13 19:52:29,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:52:29,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:52:29,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:52:29,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:52:29,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:52:28" (1/3) ... [2022-12-13 19:52:29,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fcb9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:52:29, skipping insertion in model container [2022-12-13 19:52:29,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:52:29" (2/3) ... [2022-12-13 19:52:29,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fcb9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:52:29, skipping insertion in model container [2022-12-13 19:52:29,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:52:29" (3/3) ... [2022-12-13 19:52:29,852 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2022-12-13 19:52:29,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:52:29,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-13 19:52:29,871 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:52:29,941 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 19:52:29,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 181 transitions, 386 flow [2022-12-13 19:52:30,037 INFO L130 PetriNetUnfolder]: 12/178 cut-off events. [2022-12-13 19:52:30,037 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:52:30,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 178 events. 12/178 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2022-12-13 19:52:30,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 181 transitions, 386 flow [2022-12-13 19:52:30,048 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 173 transitions, 364 flow [2022-12-13 19:52:30,052 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:52:30,062 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 173 transitions, 364 flow [2022-12-13 19:52:30,065 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 173 transitions, 364 flow [2022-12-13 19:52:30,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 173 transitions, 364 flow [2022-12-13 19:52:30,106 INFO L130 PetriNetUnfolder]: 12/173 cut-off events. [2022-12-13 19:52:30,106 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:52:30,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 173 events. 12/173 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2022-12-13 19:52:30,109 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-12-13 19:52:53,270 INFO L134 LiptonReduction]: Checked pairs total: 3566 [2022-12-13 19:52:53,271 INFO L136 LiptonReduction]: Total number of compositions: 180 [2022-12-13 19:52:53,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:52:53,288 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;@288ef4c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:52:53,288 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-12-13 19:52:53,290 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 19:52:53,290 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:52:53,290 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:53,290 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:52:53,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:52:53,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:53,294 INFO L85 PathProgramCache]: Analyzing trace with hash 23328, now seen corresponding path program 1 times [2022-12-13 19:52:53,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:52:53,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467243140] [2022-12-13 19:52:53,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:53,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:52:53,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:52:53,305 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:52:53,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 19:52:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:53,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:52:53,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:53,559 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:52:53,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:52:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:53,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:52:53,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:52:53,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467243140] [2022-12-13 19:52:53,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467243140] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:53,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:52:53,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:52:53,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745300455] [2022-12-13 19:52:53,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:53,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:52:53,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:52:53,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:52:53,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:52:53,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 361 [2022-12-13 19:52:53,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:53,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:53,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 361 [2022-12-13 19:52:53,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:54,645 INFO L130 PetriNetUnfolder]: 5423/6918 cut-off events. [2022-12-13 19:52:54,645 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2022-12-13 19:52:54,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13966 conditions, 6918 events. 5423/6918 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 31090 event pairs, 2585 based on Foata normal form. 0/1944 useless extension candidates. Maximal degree in co-relation 5996. Up to 3433 conditions per place. [2022-12-13 19:52:54,694 INFO L137 encePairwiseOnDemand]: 351/361 looper letters, 78 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-12-13 19:52:54,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 362 flow [2022-12-13 19:52:54,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:52:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:52:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2022-12-13 19:52:54,709 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5032317636195752 [2022-12-13 19:52:54,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2022-12-13 19:52:54,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2022-12-13 19:52:54,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:54,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2022-12-13 19:52:54,718 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 19:52:54,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:54,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:54,727 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 120 flow. Second operand 3 states and 545 transitions. [2022-12-13 19:52:54,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 362 flow [2022-12-13 19:52:54,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 338 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 19:52:54,738 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2022-12-13 19:52:54,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2022-12-13 19:52:54,743 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2022-12-13 19:52:54,744 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2022-12-13 19:52:54,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:54,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:54,744 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:52:54,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:52:54,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:52:54,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:52:54,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:54,946 INFO L85 PathProgramCache]: Analyzing trace with hash 23485, now seen corresponding path program 1 times [2022-12-13 19:52:54,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:52:54,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944434063] [2022-12-13 19:52:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:54,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:52:54,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:52:54,969 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:52:54,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 19:52:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:55,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:52:55,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:55,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:52:55,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:52:55,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944434063] [2022-12-13 19:52:55,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944434063] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:55,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:52:55,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:52:55,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941785546] [2022-12-13 19:52:55,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:55,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:52:55,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:52:55,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:52:55,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:52:55,110 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 361 [2022-12-13 19:52:55,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:55,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:55,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 361 [2022-12-13 19:52:55,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:55,603 INFO L130 PetriNetUnfolder]: 2717/3467 cut-off events. [2022-12-13 19:52:55,604 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 19:52:55,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6944 conditions, 3467 events. 2717/3467 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 14218 event pairs, 1294 based on Foata normal form. 0/975 useless extension candidates. Maximal degree in co-relation 6931. Up to 3436 conditions per place. [2022-12-13 19:52:55,633 INFO L137 encePairwiseOnDemand]: 356/361 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2022-12-13 19:52:55,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 194 flow [2022-12-13 19:52:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:52:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:52:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2022-12-13 19:52:55,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46352723915050786 [2022-12-13 19:52:55,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2022-12-13 19:52:55,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2022-12-13 19:52:55,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:55,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2022-12-13 19:52:55,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:55,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:55,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:55,643 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 502 transitions. [2022-12-13 19:52:55,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 194 flow [2022-12-13 19:52:55,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:52:55,645 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 116 flow [2022-12-13 19:52:55,645 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2022-12-13 19:52:55,646 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2022-12-13 19:52:55,646 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 116 flow [2022-12-13 19:52:55,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:55,646 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:55,647 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:52:55,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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 19:52:55,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:52:55,848 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:52:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:55,849 INFO L85 PathProgramCache]: Analyzing trace with hash 23327, now seen corresponding path program 1 times [2022-12-13 19:52:55,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:52:55,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619929884] [2022-12-13 19:52:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:55,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:52:55,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:52:55,850 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:52:55,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 19:52:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:55,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:52:55,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:55,964 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 19:52:55,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 19:52:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:55,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:52:55,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:52:55,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619929884] [2022-12-13 19:52:55,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619929884] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:55,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:52:55,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:52:55,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104935366] [2022-12-13 19:52:55,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:55,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:52:55,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:52:55,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:52:55,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:52:56,059 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 361 [2022-12-13 19:52:56,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:56,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:56,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 361 [2022-12-13 19:52:56,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:56,512 INFO L130 PetriNetUnfolder]: 2717/3465 cut-off events. [2022-12-13 19:52:56,513 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 19:52:56,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6946 conditions, 3465 events. 2717/3465 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 14061 event pairs, 1294 based on Foata normal form. 2/976 useless extension candidates. Maximal degree in co-relation 6932. Up to 3435 conditions per place. [2022-12-13 19:52:56,537 INFO L137 encePairwiseOnDemand]: 359/361 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-12-13 19:52:56,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 196 flow [2022-12-13 19:52:56,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:52:56,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:52:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2022-12-13 19:52:56,539 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4533702677746999 [2022-12-13 19:52:56,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2022-12-13 19:52:56,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2022-12-13 19:52:56,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:56,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2022-12-13 19:52:56,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:56,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:56,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:56,545 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 116 flow. Second operand 3 states and 491 transitions. [2022-12-13 19:52:56,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 196 flow [2022-12-13 19:52:56,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 19:52:56,547 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 110 flow [2022-12-13 19:52:56,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2022-12-13 19:52:56,548 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2022-12-13 19:52:56,548 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 110 flow [2022-12-13 19:52:56,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:56,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:56,549 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:52:56,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 19:52:56,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:52:56,750 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:52:56,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:56,750 INFO L85 PathProgramCache]: Analyzing trace with hash 727555, now seen corresponding path program 1 times [2022-12-13 19:52:56,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:52:56,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858156305] [2022-12-13 19:52:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:56,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:52:56,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:52:56,752 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:52:56,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 19:52:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:56,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:52:56,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:56,901 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:52:56,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:52:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:56,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:57,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:52:57,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858156305] [2022-12-13 19:52:57,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858156305] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:57,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:52:57,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 19:52:57,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024391547] [2022-12-13 19:52:57,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:57,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:52:57,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:52:57,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:52:57,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:52:57,811 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 361 [2022-12-13 19:52:57,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 110 flow. Second operand has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:57,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:57,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 361 [2022-12-13 19:52:57,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:58,916 INFO L130 PetriNetUnfolder]: 5429/6925 cut-off events. [2022-12-13 19:52:58,916 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 19:52:58,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13876 conditions, 6925 events. 5429/6925 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 31439 event pairs, 2585 based on Foata normal form. 0/1951 useless extension candidates. Maximal degree in co-relation 13867. Up to 3432 conditions per place. [2022-12-13 19:52:58,946 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 76 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2022-12-13 19:52:58,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 90 transitions, 406 flow [2022-12-13 19:52:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:52:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:52:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 960 transitions. [2022-12-13 19:52:58,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44321329639889195 [2022-12-13 19:52:58,949 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 960 transitions. [2022-12-13 19:52:58,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 960 transitions. [2022-12-13 19:52:58,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:58,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 960 transitions. [2022-12-13 19:52:58,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:58,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:58,963 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:58,963 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 110 flow. Second operand 6 states and 960 transitions. [2022-12-13 19:52:58,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 90 transitions, 406 flow [2022-12-13 19:52:58,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 90 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:52:58,966 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 207 flow [2022-12-13 19:52:58,967 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2022-12-13 19:52:58,968 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2022-12-13 19:52:58,968 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 207 flow [2022-12-13 19:52:58,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:58,969 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:58,969 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:52:58,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 19:52:59,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:52:59,170 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:52:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:59,170 INFO L85 PathProgramCache]: Analyzing trace with hash 727712, now seen corresponding path program 1 times [2022-12-13 19:52:59,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:52:59,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656059897] [2022-12-13 19:52:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:59,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:52:59,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:52:59,171 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:52:59,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 19:52:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:59,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 19:52:59,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:59,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:52:59,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:52:59,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:52:59,339 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-12-13 19:52:59,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2022-12-13 19:52:59,359 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 19:52:59,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 19:52:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:59,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:59,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:52:59,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656059897] [2022-12-13 19:52:59,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656059897] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:59,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:52:59,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 19:52:59,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378344853] [2022-12-13 19:52:59,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:59,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:52:59,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:52:59,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:52:59,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:53:01,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:53:02,279 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 361 [2022-12-13 19:53:02,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 207 flow. Second operand has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:02,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:53:02,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 361 [2022-12-13 19:53:02,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:53:03,607 INFO L130 PetriNetUnfolder]: 4851/6222 cut-off events. [2022-12-13 19:53:03,607 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 19:53:03,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12501 conditions, 6222 events. 4851/6222 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 28212 event pairs, 2310 based on Foata normal form. 0/1802 useless extension candidates. Maximal degree in co-relation 12487. Up to 3423 conditions per place. [2022-12-13 19:53:03,638 INFO L137 encePairwiseOnDemand]: 354/361 looper letters, 72 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2022-12-13 19:53:03,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 445 flow [2022-12-13 19:53:03,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:53:03,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 19:53:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1074 transitions. [2022-12-13 19:53:03,643 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4250098931539375 [2022-12-13 19:53:03,643 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1074 transitions. [2022-12-13 19:53:03,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1074 transitions. [2022-12-13 19:53:03,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:53:03,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1074 transitions. [2022-12-13 19:53:03,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.42857142857142) internal successors, (1074), 7 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:03,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:03,651 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:03,651 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 207 flow. Second operand 7 states and 1074 transitions. [2022-12-13 19:53:03,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 445 flow [2022-12-13 19:53:03,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 425 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 19:53:03,653 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 197 flow [2022-12-13 19:53:03,654 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=197, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2022-12-13 19:53:03,654 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2022-12-13 19:53:03,654 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 197 flow [2022-12-13 19:53:03,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:03,654 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:53:03,655 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:53:03,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 19:53:03,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:03,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:53:03,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:03,855 INFO L85 PathProgramCache]: Analyzing trace with hash 727711, now seen corresponding path program 1 times [2022-12-13 19:53:03,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:53:03,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540574244] [2022-12-13 19:53:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:03,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:53:03,857 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:53:03,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 19:53:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:03,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 19:53:03,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:03,975 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-12-13 19:53:03,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-12-13 19:53:04,029 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 19:53:04,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:53:04,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:53:04,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540574244] [2022-12-13 19:53:04,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540574244] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:53:04,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:53:04,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:53:04,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418917185] [2022-12-13 19:53:04,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:53:04,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:53:04,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:53:04,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:53:04,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:53:04,218 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 361 [2022-12-13 19:53:04,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:04,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:53:04,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 361 [2022-12-13 19:53:04,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:53:04,688 INFO L130 PetriNetUnfolder]: 3710/4828 cut-off events. [2022-12-13 19:53:04,688 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2022-12-13 19:53:04,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9806 conditions, 4828 events. 3710/4828 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 21926 event pairs, 1763 based on Foata normal form. 0/1601 useless extension candidates. Maximal degree in co-relation 9790. Up to 4768 conditions per place. [2022-12-13 19:53:04,700 INFO L137 encePairwiseOnDemand]: 358/361 looper letters, 43 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2022-12-13 19:53:04,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 47 transitions, 259 flow [2022-12-13 19:53:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:53:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:53:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2022-12-13 19:53:04,702 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45244690674053556 [2022-12-13 19:53:04,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2022-12-13 19:53:04,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2022-12-13 19:53:04,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:53:04,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2022-12-13 19:53:04,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:04,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:04,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:04,705 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 197 flow. Second operand 3 states and 490 transitions. [2022-12-13 19:53:04,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 47 transitions, 259 flow [2022-12-13 19:53:04,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 47 transitions, 233 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-12-13 19:53:04,706 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 147 flow [2022-12-13 19:53:04,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2022-12-13 19:53:04,707 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2022-12-13 19:53:04,707 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 147 flow [2022-12-13 19:53:04,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:04,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:53:04,707 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:53:04,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 19:53:04,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:04,908 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:53:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:04,908 INFO L85 PathProgramCache]: Analyzing trace with hash 699346053, now seen corresponding path program 1 times [2022-12-13 19:53:04,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:53:04,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265573968] [2022-12-13 19:53:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:04,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:04,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:53:04,910 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:53:04,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 19:53:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:04,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 19:53:04,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:05,050 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 19:53:05,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-12-13 19:53:05,137 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 19:53:05,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:53:05,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:53:05,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265573968] [2022-12-13 19:53:05,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265573968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:53:05,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:53:05,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:53:05,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980915391] [2022-12-13 19:53:05,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:53:05,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:53:05,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:53:05,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:53:05,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:53:05,281 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 361 [2022-12-13 19:53:05,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:05,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:53:05,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 361 [2022-12-13 19:53:05,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:53:05,731 INFO L130 PetriNetUnfolder]: 3536/4594 cut-off events. [2022-12-13 19:53:05,732 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2022-12-13 19:53:05,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9325 conditions, 4594 events. 3536/4594 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 20601 event pairs, 1677 based on Foata normal form. 0/1559 useless extension candidates. Maximal degree in co-relation 9310. Up to 4534 conditions per place. [2022-12-13 19:53:05,746 INFO L137 encePairwiseOnDemand]: 358/361 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-12-13 19:53:05,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 45 transitions, 227 flow [2022-12-13 19:53:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:53:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:53:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2022-12-13 19:53:05,749 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45060018467220686 [2022-12-13 19:53:05,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2022-12-13 19:53:05,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2022-12-13 19:53:05,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:53:05,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2022-12-13 19:53:05,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:05,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:05,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:05,752 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 147 flow. Second operand 3 states and 488 transitions. [2022-12-13 19:53:05,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 45 transitions, 227 flow [2022-12-13 19:53:05,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 45 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:53:05,754 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 144 flow [2022-12-13 19:53:05,754 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2022-12-13 19:53:05,755 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2022-12-13 19:53:05,755 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 144 flow [2022-12-13 19:53:05,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:05,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:53:05,755 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:53:05,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 19:53:05,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:05,957 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:53:05,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:05,958 INFO L85 PathProgramCache]: Analyzing trace with hash 699346054, now seen corresponding path program 1 times [2022-12-13 19:53:05,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:53:05,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035938345] [2022-12-13 19:53:05,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:05,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:05,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:53:05,962 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:53:05,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 19:53:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:06,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 19:53:06,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:06,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:53:06,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:53:06,179 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-13 19:53:06,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-12-13 19:53:06,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 19:53:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:06,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:53:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:06,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:53:06,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035938345] [2022-12-13 19:53:06,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035938345] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:53:06,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:53:06,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 19:53:06,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6554720] [2022-12-13 19:53:06,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:53:06,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:53:06,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:53:06,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:53:06,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:53:07,494 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 361 [2022-12-13 19:53:07,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 144 flow. Second operand has 8 states, 8 states have (on average 142.25) internal successors, (1138), 8 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:07,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:53:07,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 361 [2022-12-13 19:53:07,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:53:08,261 INFO L130 PetriNetUnfolder]: 3352/4350 cut-off events. [2022-12-13 19:53:08,261 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2022-12-13 19:53:08,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8837 conditions, 4350 events. 3352/4350 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 19206 event pairs, 1588 based on Foata normal form. 0/1516 useless extension candidates. Maximal degree in co-relation 8821. Up to 2492 conditions per place. [2022-12-13 19:53:08,273 INFO L137 encePairwiseOnDemand]: 357/361 looper letters, 66 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2022-12-13 19:53:08,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 348 flow [2022-12-13 19:53:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:53:08,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:53:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 774 transitions. [2022-12-13 19:53:08,277 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42880886426592796 [2022-12-13 19:53:08,277 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 774 transitions. [2022-12-13 19:53:08,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 774 transitions. [2022-12-13 19:53:08,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:53:08,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 774 transitions. [2022-12-13 19:53:08,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.8) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:08,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:08,285 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:08,285 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 144 flow. Second operand 5 states and 774 transitions. [2022-12-13 19:53:08,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 348 flow [2022-12-13 19:53:08,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:53:08,287 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 145 flow [2022-12-13 19:53:08,288 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2022-12-13 19:53:08,288 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2022-12-13 19:53:08,288 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 145 flow [2022-12-13 19:53:08,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.25) internal successors, (1138), 8 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:08,289 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:53:08,289 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 19:53:08,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 19:53:08,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:08,491 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:53:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:08,492 INFO L85 PathProgramCache]: Analyzing trace with hash 204110816, now seen corresponding path program 2 times [2022-12-13 19:53:08,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:53:08,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210756896] [2022-12-13 19:53:08,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:53:08,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:08,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:53:08,496 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:53:08,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 19:53:08,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:53:08,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:53:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 19:53:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:08,737 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:53:08,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:53:08,860 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 19:53:08,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:53:09,494 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 19:53:09,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:53:09,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210756896] [2022-12-13 19:53:09,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210756896] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:53:09,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:53:09,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 19:53:09,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843745572] [2022-12-13 19:53:09,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:53:09,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:53:09,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:53:09,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:53:09,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:53:13,283 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 361 [2022-12-13 19:53:13,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 145 flow. Second operand has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:13,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:53:13,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 361 [2022-12-13 19:53:13,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:53:19,175 INFO L130 PetriNetUnfolder]: 17051/21966 cut-off events. [2022-12-13 19:53:19,175 INFO L131 PetriNetUnfolder]: For 653/653 co-relation queries the response was YES. [2022-12-13 19:53:19,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44808 conditions, 21966 events. 17051/21966 cut-off events. For 653/653 co-relation queries the response was YES. Maximal size of possible extension queue 1091. Compared 112944 event pairs, 8098 based on Foata normal form. 6/7673 useless extension candidates. Maximal degree in co-relation 44791. Up to 2488 conditions per place. [2022-12-13 19:53:19,251 INFO L137 encePairwiseOnDemand]: 356/361 looper letters, 277 selfloop transitions, 13 changer transitions 0/293 dead transitions. [2022-12-13 19:53:19,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 293 transitions, 1365 flow [2022-12-13 19:53:19,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 19:53:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 19:53:19,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2048 transitions. [2022-12-13 19:53:19,257 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4727608494921514 [2022-12-13 19:53:19,257 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2048 transitions. [2022-12-13 19:53:19,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2048 transitions. [2022-12-13 19:53:19,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:53:19,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2048 transitions. [2022-12-13 19:53:19,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 170.66666666666666) internal successors, (2048), 12 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:19,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 361.0) internal successors, (4693), 13 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:19,267 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 361.0) internal successors, (4693), 13 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:19,267 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 145 flow. Second operand 12 states and 2048 transitions. [2022-12-13 19:53:19,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 293 transitions, 1365 flow [2022-12-13 19:53:19,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 293 transitions, 1360 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 19:53:19,273 INFO L231 Difference]: Finished difference. Result has 71 places, 51 transitions, 250 flow [2022-12-13 19:53:19,273 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=250, PETRI_PLACES=71, PETRI_TRANSITIONS=51} [2022-12-13 19:53:19,273 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2022-12-13 19:53:19,273 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 51 transitions, 250 flow [2022-12-13 19:53:19,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:19,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:53:19,274 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:53:19,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 19:53:19,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:19,475 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:53:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:19,475 INFO L85 PathProgramCache]: Analyzing trace with hash 204886170, now seen corresponding path program 1 times [2022-12-13 19:53:19,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:53:19,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417027978] [2022-12-13 19:53:19,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:19,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:19,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:53:19,477 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:53:19,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 19:53:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:19,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:53:19,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:19,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:53:19,816 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 19:53:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:19,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:53:19,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417027978] [2022-12-13 19:53:19,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417027978] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:53:19,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:53:19,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:53:19,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445743285] [2022-12-13 19:53:19,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:53:19,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:53:19,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:53:19,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:53:19,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:53:21,659 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 361 [2022-12-13 19:53:21,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 51 transitions, 250 flow. Second operand has 10 states, 10 states have (on average 144.2) internal successors, (1442), 10 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:21,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:53:21,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 361 [2022-12-13 19:53:21,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:53:25,048 INFO L130 PetriNetUnfolder]: 25558/33665 cut-off events. [2022-12-13 19:53:25,049 INFO L131 PetriNetUnfolder]: For 1428/1428 co-relation queries the response was YES. [2022-12-13 19:53:25,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69048 conditions, 33665 events. 25558/33665 cut-off events. For 1428/1428 co-relation queries the response was YES. Maximal size of possible extension queue 1635. Compared 192810 event pairs, 6653 based on Foata normal form. 0/12915 useless extension candidates. Maximal degree in co-relation 69024. Up to 17952 conditions per place. [2022-12-13 19:53:25,230 INFO L137 encePairwiseOnDemand]: 354/361 looper letters, 118 selfloop transitions, 14 changer transitions 0/134 dead transitions. [2022-12-13 19:53:25,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 134 transitions, 704 flow [2022-12-13 19:53:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:53:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 19:53:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1409 transitions. [2022-12-13 19:53:25,234 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4336718990458603 [2022-12-13 19:53:25,234 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1409 transitions. [2022-12-13 19:53:25,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1409 transitions. [2022-12-13 19:53:25,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:53:25,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1409 transitions. [2022-12-13 19:53:25,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 156.55555555555554) internal successors, (1409), 9 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:25,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:25,239 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:25,240 INFO L175 Difference]: Start difference. First operand has 71 places, 51 transitions, 250 flow. Second operand 9 states and 1409 transitions. [2022-12-13 19:53:25,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 134 transitions, 704 flow [2022-12-13 19:53:25,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 134 transitions, 679 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-12-13 19:53:25,264 INFO L231 Difference]: Finished difference. Result has 77 places, 55 transitions, 279 flow [2022-12-13 19:53:25,264 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=279, PETRI_PLACES=77, PETRI_TRANSITIONS=55} [2022-12-13 19:53:25,265 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2022-12-13 19:53:25,265 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 55 transitions, 279 flow [2022-12-13 19:53:25,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 144.2) internal successors, (1442), 10 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:25,265 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:53:25,265 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:53:25,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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 19:53:25,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:25,467 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:53:25,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:25,468 INFO L85 PathProgramCache]: Analyzing trace with hash 204886169, now seen corresponding path program 1 times [2022-12-13 19:53:25,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:53:25,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781804306] [2022-12-13 19:53:25,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:25,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:25,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:53:25,473 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:53:25,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 19:53:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:25,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 19:53:25,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:25,672 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 19:53:25,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 19:53:25,692 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 19:53:25,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:53:25,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:53:25,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781804306] [2022-12-13 19:53:25,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781804306] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:53:25,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:53:25,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:53:25,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268705258] [2022-12-13 19:53:25,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:53:25,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:53:25,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:53:25,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:53:25,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:53:25,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 361 [2022-12-13 19:53:25,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 55 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:25,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:53:25,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 361 [2022-12-13 19:53:25,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:53:26,963 INFO L130 PetriNetUnfolder]: 10287/14113 cut-off events. [2022-12-13 19:53:26,963 INFO L131 PetriNetUnfolder]: For 3009/3525 co-relation queries the response was YES. [2022-12-13 19:53:26,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32046 conditions, 14113 events. 10287/14113 cut-off events. For 3009/3525 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 80168 event pairs, 5578 based on Foata normal form. 516/7924 useless extension candidates. Maximal degree in co-relation 32019. Up to 13875 conditions per place. [2022-12-13 19:53:27,014 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 40 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2022-12-13 19:53:27,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 52 transitions, 369 flow [2022-12-13 19:53:27,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:53:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:53:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 614 transitions. [2022-12-13 19:53:27,016 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.425207756232687 [2022-12-13 19:53:27,016 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 614 transitions. [2022-12-13 19:53:27,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 614 transitions. [2022-12-13 19:53:27,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:53:27,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 614 transitions. [2022-12-13 19:53:27,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:27,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 361.0) internal successors, (1805), 5 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:27,019 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 361.0) internal successors, (1805), 5 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:27,019 INFO L175 Difference]: Start difference. First operand has 77 places, 55 transitions, 279 flow. Second operand 4 states and 614 transitions. [2022-12-13 19:53:27,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 52 transitions, 369 flow [2022-12-13 19:53:27,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 52 transitions, 352 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-12-13 19:53:27,024 INFO L231 Difference]: Finished difference. Result has 73 places, 52 transitions, 272 flow [2022-12-13 19:53:27,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=73, PETRI_TRANSITIONS=52} [2022-12-13 19:53:27,024 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2022-12-13 19:53:27,025 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 52 transitions, 272 flow [2022-12-13 19:53:27,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:27,025 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:53:27,025 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 19:53:27,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 19:53:27,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:27,226 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:53:27,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:27,227 INFO L85 PathProgramCache]: Analyzing trace with hash 204110973, now seen corresponding path program 2 times [2022-12-13 19:53:27,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:53:27,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037431660] [2022-12-13 19:53:27,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:53:27,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:27,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:53:27,232 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:53:27,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 19:53:27,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:53:27,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:53:27,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 19:53:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:27,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:53:27,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:53:27,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:53:27,380 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-12-13 19:53:27,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2022-12-13 19:53:27,400 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 19:53:27,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 19:53:27,493 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 19:53:27,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:53:27,493 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:53:27,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037431660] [2022-12-13 19:53:27,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037431660] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:53:27,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:53:27,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:53:27,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689079715] [2022-12-13 19:53:27,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:53:27,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:53:27,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:53:27,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:53:27,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:53:29,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:53:31,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:53:31,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 361 [2022-12-13 19:53:31,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 52 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:31,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:53:31,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 361 [2022-12-13 19:53:31,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:53:33,517 INFO L130 PetriNetUnfolder]: 10286/14106 cut-off events. [2022-12-13 19:53:33,517 INFO L131 PetriNetUnfolder]: For 3032/3548 co-relation queries the response was YES. [2022-12-13 19:53:33,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32005 conditions, 14106 events. 10286/14106 cut-off events. For 3032/3548 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 80001 event pairs, 5578 based on Foata normal form. 516/7924 useless extension candidates. Maximal degree in co-relation 31979. Up to 13881 conditions per place. [2022-12-13 19:53:33,598 INFO L137 encePairwiseOnDemand]: 359/361 looper letters, 45 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2022-12-13 19:53:33,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 50 transitions, 338 flow [2022-12-13 19:53:33,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:53:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:53:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2022-12-13 19:53:33,601 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44136657433056325 [2022-12-13 19:53:33,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2022-12-13 19:53:33,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2022-12-13 19:53:33,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:53:33,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2022-12-13 19:53:33,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:33,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:33,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:33,645 INFO L175 Difference]: Start difference. First operand has 73 places, 52 transitions, 272 flow. Second operand 3 states and 478 transitions. [2022-12-13 19:53:33,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 50 transitions, 338 flow [2022-12-13 19:53:33,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 50 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:53:33,651 INFO L231 Difference]: Finished difference. Result has 71 places, 50 transitions, 241 flow [2022-12-13 19:53:33,651 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=71, PETRI_TRANSITIONS=50} [2022-12-13 19:53:33,652 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2022-12-13 19:53:33,652 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 50 transitions, 241 flow [2022-12-13 19:53:33,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:33,652 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:53:33,652 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:53:33,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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)] Ended with exit code 0 [2022-12-13 19:53:33,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:33,853 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:53:33,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:33,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2056507010, now seen corresponding path program 1 times [2022-12-13 19:53:33,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:53:33,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142081115] [2022-12-13 19:53:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:33,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:33,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:53:33,858 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:53:33,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 19:53:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:33,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 19:53:33,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:34,068 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:53:34,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:53:34,191 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 19:53:34,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:53:34,522 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 19:53:34,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:53:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142081115] [2022-12-13 19:53:34,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142081115] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:53:34,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:53:34,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:53:34,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562494188] [2022-12-13 19:53:34,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:53:34,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:53:34,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:53:34,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:53:34,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:53:36,613 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 361 [2022-12-13 19:53:36,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 50 transitions, 241 flow. Second operand has 10 states, 10 states have (on average 144.4) internal successors, (1444), 10 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:36,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:53:36,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 361 [2022-12-13 19:53:36,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:53:39,618 INFO L130 PetriNetUnfolder]: 19815/25938 cut-off events. [2022-12-13 19:53:39,618 INFO L131 PetriNetUnfolder]: For 4196/4196 co-relation queries the response was YES. [2022-12-13 19:53:39,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60714 conditions, 25938 events. 19815/25938 cut-off events. For 4196/4196 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 147184 event pairs, 2627 based on Foata normal form. 578/15215 useless extension candidates. Maximal degree in co-relation 60688. Up to 7601 conditions per place. [2022-12-13 19:53:39,721 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 103 selfloop transitions, 15 changer transitions 0/120 dead transitions. [2022-12-13 19:53:39,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 120 transitions, 648 flow [2022-12-13 19:53:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:53:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:53:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1250 transitions. [2022-12-13 19:53:39,725 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4328254847645429 [2022-12-13 19:53:39,725 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1250 transitions. [2022-12-13 19:53:39,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1250 transitions. [2022-12-13 19:53:39,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:53:39,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1250 transitions. [2022-12-13 19:53:39,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 156.25) internal successors, (1250), 8 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:39,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 361.0) internal successors, (3249), 9 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:39,732 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 361.0) internal successors, (3249), 9 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:39,732 INFO L175 Difference]: Start difference. First operand has 71 places, 50 transitions, 241 flow. Second operand 8 states and 1250 transitions. [2022-12-13 19:53:39,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 120 transitions, 648 flow [2022-12-13 19:53:39,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 120 transitions, 643 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 19:53:39,745 INFO L231 Difference]: Finished difference. Result has 82 places, 55 transitions, 325 flow [2022-12-13 19:53:39,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=325, PETRI_PLACES=82, PETRI_TRANSITIONS=55} [2022-12-13 19:53:39,746 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2022-12-13 19:53:39,746 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 55 transitions, 325 flow [2022-12-13 19:53:39,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 144.4) internal successors, (1444), 10 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:39,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:53:39,748 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:53:39,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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 19:53:39,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:39,949 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:53:39,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:39,950 INFO L85 PathProgramCache]: Analyzing trace with hash 2056674494, now seen corresponding path program 1 times [2022-12-13 19:53:39,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:53:39,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208847582] [2022-12-13 19:53:39,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:39,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:39,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:53:39,956 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:53:39,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 19:53:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:53:40,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:40,179 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 19:53:40,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2022-12-13 19:53:40,203 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 19:53:40,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:53:40,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:53:40,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208847582] [2022-12-13 19:53:40,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208847582] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:53:40,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:53:40,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:53:40,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418443933] [2022-12-13 19:53:40,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:53:40,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:53:40,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:53:40,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:53:40,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:53:40,296 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 361 [2022-12-13 19:53:40,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 55 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:40,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:53:40,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 361 [2022-12-13 19:53:40,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:53:42,354 INFO L130 PetriNetUnfolder]: 16096/21290 cut-off events. [2022-12-13 19:53:42,355 INFO L131 PetriNetUnfolder]: For 35299/37219 co-relation queries the response was YES. [2022-12-13 19:53:42,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60646 conditions, 21290 events. 16096/21290 cut-off events. For 35299/37219 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 115894 event pairs, 8468 based on Foata normal form. 1920/14602 useless extension candidates. Maximal degree in co-relation 60614. Up to 21047 conditions per place. [2022-12-13 19:53:42,471 INFO L137 encePairwiseOnDemand]: 358/361 looper letters, 48 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-12-13 19:53:42,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 53 transitions, 419 flow [2022-12-13 19:53:42,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:53:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:53:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2022-12-13 19:53:42,473 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43490304709141275 [2022-12-13 19:53:42,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2022-12-13 19:53:42,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2022-12-13 19:53:42,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:53:42,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2022-12-13 19:53:42,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:42,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:42,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:42,475 INFO L175 Difference]: Start difference. First operand has 82 places, 55 transitions, 325 flow. Second operand 3 states and 471 transitions. [2022-12-13 19:53:42,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 53 transitions, 419 flow [2022-12-13 19:53:42,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 53 transitions, 394 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-12-13 19:53:42,500 INFO L231 Difference]: Finished difference. Result has 79 places, 53 transitions, 298 flow [2022-12-13 19:53:42,500 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=79, PETRI_TRANSITIONS=53} [2022-12-13 19:53:42,501 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2022-12-13 19:53:42,501 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 53 transitions, 298 flow [2022-12-13 19:53:42,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:42,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:53:42,501 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:53:42,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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)] Forceful destruction successful, exit code 0 [2022-12-13 19:53:42,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:42,702 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:53:42,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:42,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2056674496, now seen corresponding path program 1 times [2022-12-13 19:53:42,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:53:42,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568541710] [2022-12-13 19:53:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:42,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:42,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:53:42,708 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:53:42,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 19:53:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:42,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:53:42,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:42,945 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:53:42,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:53:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:43,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:53:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:43,380 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:53:43,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568541710] [2022-12-13 19:53:43,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568541710] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:53:43,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:53:43,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 19:53:43,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007153731] [2022-12-13 19:53:43,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:53:43,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:53:43,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:53:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:53:43,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:53:44,295 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 361 [2022-12-13 19:53:44,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 53 transitions, 298 flow. Second operand has 8 states, 8 states have (on average 142.75) internal successors, (1142), 8 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:44,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:53:44,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 361 [2022-12-13 19:53:44,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:53:46,309 INFO L130 PetriNetUnfolder]: 15214/20048 cut-off events. [2022-12-13 19:53:46,309 INFO L131 PetriNetUnfolder]: For 25530/27338 co-relation queries the response was YES. [2022-12-13 19:53:46,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53693 conditions, 20048 events. 15214/20048 cut-off events. For 25530/27338 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 106891 event pairs, 7964 based on Foata normal form. 1808/14006 useless extension candidates. Maximal degree in co-relation 53661. Up to 18180 conditions per place. [2022-12-13 19:53:46,432 INFO L137 encePairwiseOnDemand]: 357/361 looper letters, 70 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2022-12-13 19:53:46,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 77 transitions, 538 flow [2022-12-13 19:53:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:53:46,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:53:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 759 transitions. [2022-12-13 19:53:46,435 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42049861495844876 [2022-12-13 19:53:46,435 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 759 transitions. [2022-12-13 19:53:46,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 759 transitions. [2022-12-13 19:53:46,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:53:46,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 759 transitions. [2022-12-13 19:53:46,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.8) internal successors, (759), 5 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:46,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:46,438 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:46,438 INFO L175 Difference]: Start difference. First operand has 79 places, 53 transitions, 298 flow. Second operand 5 states and 759 transitions. [2022-12-13 19:53:46,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 77 transitions, 538 flow [2022-12-13 19:53:46,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 537 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:53:46,460 INFO L231 Difference]: Finished difference. Result has 80 places, 51 transitions, 299 flow [2022-12-13 19:53:46,460 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=80, PETRI_TRANSITIONS=51} [2022-12-13 19:53:46,460 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2022-12-13 19:53:46,461 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 51 transitions, 299 flow [2022-12-13 19:53:46,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.75) internal successors, (1142), 8 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:46,461 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:53:46,461 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:53:46,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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)] Ended with exit code 0 [2022-12-13 19:53:46,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:46,662 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:53:46,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:46,663 INFO L85 PathProgramCache]: Analyzing trace with hash -667605200, now seen corresponding path program 1 times [2022-12-13 19:53:46,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:53:46,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972367957] [2022-12-13 19:53:46,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:46,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:46,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:53:46,668 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:53:46,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 19:53:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:46,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:53:46,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:46,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:53:47,009 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 19:53:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:47,084 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:53:47,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972367957] [2022-12-13 19:53:47,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972367957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:53:47,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:53:47,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:53:47,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576204932] [2022-12-13 19:53:47,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:53:47,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:53:47,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:53:47,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:53:47,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:53:49,125 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 361 [2022-12-13 19:53:49,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 51 transitions, 299 flow. Second operand has 10 states, 10 states have (on average 144.6) internal successors, (1446), 10 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:49,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:53:49,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 361 [2022-12-13 19:53:49,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:53:52,122 INFO L130 PetriNetUnfolder]: 20957/28211 cut-off events. [2022-12-13 19:53:52,122 INFO L131 PetriNetUnfolder]: For 42071/44963 co-relation queries the response was YES. [2022-12-13 19:53:52,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77604 conditions, 28211 events. 20957/28211 cut-off events. For 42071/44963 co-relation queries the response was YES. Maximal size of possible extension queue 1357. Compared 165031 event pairs, 8375 based on Foata normal form. 2892/21909 useless extension candidates. Maximal degree in co-relation 77571. Up to 16945 conditions per place. [2022-12-13 19:53:52,284 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 110 selfloop transitions, 12 changer transitions 0/125 dead transitions. [2022-12-13 19:53:52,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 125 transitions, 835 flow [2022-12-13 19:53:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:53:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 19:53:52,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1376 transitions. [2022-12-13 19:53:52,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42351492767005233 [2022-12-13 19:53:52,287 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1376 transitions. [2022-12-13 19:53:52,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1376 transitions. [2022-12-13 19:53:52,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:53:52,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1376 transitions. [2022-12-13 19:53:52,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.88888888888889) internal successors, (1376), 9 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:52,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:52,293 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:52,293 INFO L175 Difference]: Start difference. First operand has 80 places, 51 transitions, 299 flow. Second operand 9 states and 1376 transitions. [2022-12-13 19:53:52,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 125 transitions, 835 flow [2022-12-13 19:53:52,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 830 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 19:53:52,324 INFO L231 Difference]: Finished difference. Result has 87 places, 54 transitions, 336 flow [2022-12-13 19:53:52,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=336, PETRI_PLACES=87, PETRI_TRANSITIONS=54} [2022-12-13 19:53:52,325 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2022-12-13 19:53:52,325 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 54 transitions, 336 flow [2022-12-13 19:53:52,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 144.6) internal successors, (1446), 10 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:52,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:53:52,325 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:53:52,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 19:53:52,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:52,526 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:53:52,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:52,527 INFO L85 PathProgramCache]: Analyzing trace with hash 779077708, now seen corresponding path program 1 times [2022-12-13 19:53:52,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:53:52,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317951697] [2022-12-13 19:53:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:52,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:53:52,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:53:52,531 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:53:52,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 19:53:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:52,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 19:53:52,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:52,746 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:53:52,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:53:52,929 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 19:53:52,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:53:53,304 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 19:53:53,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:53:53,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317951697] [2022-12-13 19:53:53,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317951697] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:53:53,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:53:53,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:53:53,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490075526] [2022-12-13 19:53:53,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:53:53,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:53:53,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:53:53,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:53:53,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:53:56,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 361 [2022-12-13 19:53:56,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 54 transitions, 336 flow. Second operand has 10 states, 10 states have (on average 142.8) internal successors, (1428), 10 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:56,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:53:56,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 361 [2022-12-13 19:53:56,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:54:02,489 INFO L130 PetriNetUnfolder]: 40481/53695 cut-off events. [2022-12-13 19:54:02,489 INFO L131 PetriNetUnfolder]: For 84620/89952 co-relation queries the response was YES. [2022-12-13 19:54:02,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160791 conditions, 53695 events. 40481/53695 cut-off events. For 84620/89952 co-relation queries the response was YES. Maximal size of possible extension queue 2301. Compared 332843 event pairs, 6095 based on Foata normal form. 5332/46703 useless extension candidates. Maximal degree in co-relation 160756. Up to 13881 conditions per place. [2022-12-13 19:54:02,832 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 150 selfloop transitions, 15 changer transitions 0/168 dead transitions. [2022-12-13 19:54:02,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 168 transitions, 1172 flow [2022-12-13 19:54:02,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:54:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 19:54:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1379 transitions. [2022-12-13 19:54:02,836 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4244382887042167 [2022-12-13 19:54:02,836 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1379 transitions. [2022-12-13 19:54:02,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1379 transitions. [2022-12-13 19:54:02,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:54:02,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1379 transitions. [2022-12-13 19:54:02,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 153.22222222222223) internal successors, (1379), 9 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:02,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:02,841 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:02,841 INFO L175 Difference]: Start difference. First operand has 87 places, 54 transitions, 336 flow. Second operand 9 states and 1379 transitions. [2022-12-13 19:54:02,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 168 transitions, 1172 flow [2022-12-13 19:54:02,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 168 transitions, 1161 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 19:54:02,898 INFO L231 Difference]: Finished difference. Result has 95 places, 59 transitions, 407 flow [2022-12-13 19:54:02,898 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=407, PETRI_PLACES=95, PETRI_TRANSITIONS=59} [2022-12-13 19:54:02,898 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2022-12-13 19:54:02,898 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 59 transitions, 407 flow [2022-12-13 19:54:02,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.8) internal successors, (1428), 10 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:02,899 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:54:02,899 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:02,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 19:54:03,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:54:03,100 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:54:03,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:03,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1989839514, now seen corresponding path program 2 times [2022-12-13 19:54:03,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:54:03,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655681575] [2022-12-13 19:54:03,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:54:03,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:54:03,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:54:03,107 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:54:03,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 19:54:03,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:54:03,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:54:03,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 19:54:03,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:03,372 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:54:03,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:54:03,654 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 19:54:03,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:04,669 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 19:54:04,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:54:04,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655681575] [2022-12-13 19:54:04,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655681575] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:04,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:54:04,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 19:54:04,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625993728] [2022-12-13 19:54:04,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:04,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 19:54:04,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:54:04,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 19:54:04,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:54:13,539 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 361 [2022-12-13 19:54:13,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 59 transitions, 407 flow. Second operand has 18 states, 18 states have (on average 138.11111111111111) internal successors, (2486), 18 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:13,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:54:13,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 361 [2022-12-13 19:54:13,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:54:30,861 INFO L130 PetriNetUnfolder]: 41529/55577 cut-off events. [2022-12-13 19:54:30,861 INFO L131 PetriNetUnfolder]: For 137019/140733 co-relation queries the response was YES. [2022-12-13 19:54:31,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191122 conditions, 55577 events. 41529/55577 cut-off events. For 137019/140733 co-relation queries the response was YES. Maximal size of possible extension queue 2497. Compared 349685 event pairs, 13696 based on Foata normal form. 4100/47920 useless extension candidates. Maximal degree in co-relation 191083. Up to 23458 conditions per place. [2022-12-13 19:54:31,229 INFO L137 encePairwiseOnDemand]: 353/361 looper letters, 308 selfloop transitions, 24 changer transitions 0/335 dead transitions. [2022-12-13 19:54:31,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 335 transitions, 2493 flow [2022-12-13 19:54:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 19:54:31,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 19:54:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2840 transitions. [2022-12-13 19:54:31,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4140545268989649 [2022-12-13 19:54:31,236 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2840 transitions. [2022-12-13 19:54:31,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2840 transitions. [2022-12-13 19:54:31,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:54:31,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2840 transitions. [2022-12-13 19:54:31,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 149.47368421052633) internal successors, (2840), 19 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:31,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 361.0) internal successors, (7220), 20 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:31,246 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 361.0) internal successors, (7220), 20 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:31,246 INFO L175 Difference]: Start difference. First operand has 95 places, 59 transitions, 407 flow. Second operand 19 states and 2840 transitions. [2022-12-13 19:54:31,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 335 transitions, 2493 flow [2022-12-13 19:54:31,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 335 transitions, 2274 flow, removed 98 selfloop flow, removed 3 redundant places. [2022-12-13 19:54:31,520 INFO L231 Difference]: Finished difference. Result has 117 places, 71 transitions, 550 flow [2022-12-13 19:54:31,520 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=550, PETRI_PLACES=117, PETRI_TRANSITIONS=71} [2022-12-13 19:54:31,521 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 60 predicate places. [2022-12-13 19:54:31,521 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 71 transitions, 550 flow [2022-12-13 19:54:31,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 138.11111111111111) internal successors, (2486), 18 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:31,521 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:54:31,521 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:31,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 19:54:31,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:54:31,722 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:54:31,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:31,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1613047394, now seen corresponding path program 1 times [2022-12-13 19:54:31,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:54:31,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327708033] [2022-12-13 19:54:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:31,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:54:31,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:54:31,728 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:54:31,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 19:54:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:31,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 19:54:31,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:31,911 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:54:31,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:54:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:32,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:33,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:54:33,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327708033] [2022-12-13 19:54:33,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327708033] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:33,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:54:33,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:54:33,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331497387] [2022-12-13 19:54:33,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:33,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:54:33,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:54:33,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:54:33,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:54:38,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 361 [2022-12-13 19:54:38,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 71 transitions, 550 flow. Second operand has 10 states, 10 states have (on average 138.0) internal successors, (1380), 10 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:38,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:54:38,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 361 [2022-12-13 19:54:38,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:54:47,858 INFO L130 PetriNetUnfolder]: 37931/52665 cut-off events. [2022-12-13 19:54:47,858 INFO L131 PetriNetUnfolder]: For 194240/203426 co-relation queries the response was YES. [2022-12-13 19:54:48,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198184 conditions, 52665 events. 37931/52665 cut-off events. For 194240/203426 co-relation queries the response was YES. Maximal size of possible extension queue 1949. Compared 334754 event pairs, 24943 based on Foata normal form. 9186/55452 useless extension candidates. Maximal degree in co-relation 198138. Up to 30421 conditions per place. [2022-12-13 19:54:48,260 INFO L137 encePairwiseOnDemand]: 353/361 looper letters, 151 selfloop transitions, 15 changer transitions 0/171 dead transitions. [2022-12-13 19:54:48,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 171 transitions, 1400 flow [2022-12-13 19:54:48,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 19:54:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 19:54:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1604 transitions. [2022-12-13 19:54:48,265 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40392848149080834 [2022-12-13 19:54:48,265 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1604 transitions. [2022-12-13 19:54:48,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1604 transitions. [2022-12-13 19:54:48,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:54:48,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1604 transitions. [2022-12-13 19:54:48,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 145.8181818181818) internal successors, (1604), 11 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:48,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 361.0) internal successors, (4332), 12 states have internal predecessors, (4332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:48,270 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 361.0) internal successors, (4332), 12 states have internal predecessors, (4332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:48,270 INFO L175 Difference]: Start difference. First operand has 117 places, 71 transitions, 550 flow. Second operand 11 states and 1604 transitions. [2022-12-13 19:54:48,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 171 transitions, 1400 flow [2022-12-13 19:54:48,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 171 transitions, 1317 flow, removed 29 selfloop flow, removed 8 redundant places. [2022-12-13 19:54:48,558 INFO L231 Difference]: Finished difference. Result has 121 places, 75 transitions, 549 flow [2022-12-13 19:54:48,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=549, PETRI_PLACES=121, PETRI_TRANSITIONS=75} [2022-12-13 19:54:48,559 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 64 predicate places. [2022-12-13 19:54:48,559 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 75 transitions, 549 flow [2022-12-13 19:54:48,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.0) internal successors, (1380), 10 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:48,559 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:54:48,559 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:48,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 19:54:48,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:54:48,760 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:54:48,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:48,761 INFO L85 PathProgramCache]: Analyzing trace with hash 723564119, now seen corresponding path program 1 times [2022-12-13 19:54:48,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:54:48,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229935488] [2022-12-13 19:54:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:48,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:54:48,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:54:48,766 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:54:48,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 19:54:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:48,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:54:48,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:54:48,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:54:48,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:54:48,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229935488] [2022-12-13 19:54:48,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229935488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:54:48,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:54:48,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:54:48,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643987100] [2022-12-13 19:54:48,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:48,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:54:48,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:54:48,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:54:48,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:54:49,091 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 361 [2022-12-13 19:54:49,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 75 transitions, 549 flow. Second operand has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:49,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:54:49,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 361 [2022-12-13 19:54:49,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:54:53,394 INFO L130 PetriNetUnfolder]: 23433/32220 cut-off events. [2022-12-13 19:54:53,394 INFO L131 PetriNetUnfolder]: For 103611/109288 co-relation queries the response was YES. [2022-12-13 19:54:53,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129657 conditions, 32220 events. 23433/32220 cut-off events. For 103611/109288 co-relation queries the response was YES. Maximal size of possible extension queue 1471. Compared 199777 event pairs, 15542 based on Foata normal form. 8111/37078 useless extension candidates. Maximal degree in co-relation 129610. Up to 32145 conditions per place. [2022-12-13 19:54:53,640 INFO L137 encePairwiseOnDemand]: 359/361 looper letters, 65 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2022-12-13 19:54:53,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 74 transitions, 677 flow [2022-12-13 19:54:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:54:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:54:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2022-12-13 19:54:53,642 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43674976915974145 [2022-12-13 19:54:53,642 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2022-12-13 19:54:53,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2022-12-13 19:54:53,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:54:53,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2022-12-13 19:54:53,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:53,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:53,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:53,644 INFO L175 Difference]: Start difference. First operand has 121 places, 75 transitions, 549 flow. Second operand 3 states and 473 transitions. [2022-12-13 19:54:53,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 74 transitions, 677 flow [2022-12-13 19:54:54,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 74 transitions, 656 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-12-13 19:54:54,065 INFO L231 Difference]: Finished difference. Result has 116 places, 74 transitions, 526 flow [2022-12-13 19:54:54,065 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=526, PETRI_PLACES=116, PETRI_TRANSITIONS=74} [2022-12-13 19:54:54,065 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2022-12-13 19:54:54,065 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 74 transitions, 526 flow [2022-12-13 19:54:54,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:54,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:54:54,065 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:54,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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 19:54:54,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:54:54,267 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:54:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:54,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1535142488, now seen corresponding path program 1 times [2022-12-13 19:54:54,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:54:54,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119715895] [2022-12-13 19:54:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:54,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:54:54,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:54:54,272 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:54:54,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 19:54:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:54,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 19:54:54,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:54,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:54,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:54:54,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119715895] [2022-12-13 19:54:54,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119715895] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:54,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:54:54,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 19:54:54,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780620706] [2022-12-13 19:54:54,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:54,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:54:54,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:54:54,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:54:54,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:54:56,018 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 361 [2022-12-13 19:54:56,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 74 transitions, 526 flow. Second operand has 12 states, 12 states have (on average 144.83333333333334) internal successors, (1738), 12 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:56,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:54:56,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 361 [2022-12-13 19:54:56,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:55:01,287 INFO L130 PetriNetUnfolder]: 21755/30859 cut-off events. [2022-12-13 19:55:01,287 INFO L131 PetriNetUnfolder]: For 113607/119158 co-relation queries the response was YES. [2022-12-13 19:55:01,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123848 conditions, 30859 events. 21755/30859 cut-off events. For 113607/119158 co-relation queries the response was YES. Maximal size of possible extension queue 1131. Compared 191750 event pairs, 11742 based on Foata normal form. 5639/34854 useless extension candidates. Maximal degree in co-relation 123802. Up to 22588 conditions per place. [2022-12-13 19:55:01,514 INFO L137 encePairwiseOnDemand]: 353/361 looper letters, 143 selfloop transitions, 12 changer transitions 0/160 dead transitions. [2022-12-13 19:55:01,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 160 transitions, 1322 flow [2022-12-13 19:55:01,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 19:55:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 19:55:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1512 transitions. [2022-12-13 19:55:01,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4188365650969529 [2022-12-13 19:55:01,518 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1512 transitions. [2022-12-13 19:55:01,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1512 transitions. [2022-12-13 19:55:01,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:55:01,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1512 transitions. [2022-12-13 19:55:01,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 151.2) internal successors, (1512), 10 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:01,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 361.0) internal successors, (3971), 11 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:01,522 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 361.0) internal successors, (3971), 11 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:01,522 INFO L175 Difference]: Start difference. First operand has 116 places, 74 transitions, 526 flow. Second operand 10 states and 1512 transitions. [2022-12-13 19:55:01,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 160 transitions, 1322 flow [2022-12-13 19:55:01,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1321 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:55:01,858 INFO L231 Difference]: Finished difference. Result has 126 places, 75 transitions, 565 flow [2022-12-13 19:55:01,858 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=565, PETRI_PLACES=126, PETRI_TRANSITIONS=75} [2022-12-13 19:55:01,859 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 69 predicate places. [2022-12-13 19:55:01,859 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 75 transitions, 565 flow [2022-12-13 19:55:01,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 144.83333333333334) internal successors, (1738), 12 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:01,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:55:01,859 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-12-13 19:55:01,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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)] Ended with exit code 0 [2022-12-13 19:55:02,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:55:02,060 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:55:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:55:02,061 INFO L85 PathProgramCache]: Analyzing trace with hash -419355393, now seen corresponding path program 3 times [2022-12-13 19:55:02,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:55:02,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097023405] [2022-12-13 19:55:02,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:55:02,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:55:02,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:55:02,065 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:55:02,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 19:55:02,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 19:55:02,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:55:02,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 19:55:02,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:55:02,380 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:55:02,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:55:02,704 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 19:55:02,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:55:02,821 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 19:55:02,839 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 19:55:02,841 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 19:55:04,579 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 19:55:04,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:55:04,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097023405] [2022-12-13 19:55:04,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097023405] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:55:04,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:55:04,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-12-13 19:55:04,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026374653] [2022-12-13 19:55:04,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:55:04,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 19:55:04,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:55:04,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 19:55:04,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:55:22,354 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 361 [2022-12-13 19:55:22,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 75 transitions, 565 flow. Second operand has 21 states, 21 states have (on average 142.14285714285714) internal successors, (2985), 21 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:22,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:55:22,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 361 [2022-12-13 19:55:22,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:55:39,241 INFO L130 PetriNetUnfolder]: 31551/44054 cut-off events. [2022-12-13 19:55:39,241 INFO L131 PetriNetUnfolder]: For 151740/155787 co-relation queries the response was YES. [2022-12-13 19:55:39,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192055 conditions, 44054 events. 31551/44054 cut-off events. For 151740/155787 co-relation queries the response was YES. Maximal size of possible extension queue 1943. Compared 293639 event pairs, 10235 based on Foata normal form. 4393/44549 useless extension candidates. Maximal degree in co-relation 192006. Up to 19839 conditions per place. [2022-12-13 19:55:39,584 INFO L137 encePairwiseOnDemand]: 352/361 looper letters, 395 selfloop transitions, 46 changer transitions 0/446 dead transitions. [2022-12-13 19:55:39,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 446 transitions, 3425 flow [2022-12-13 19:55:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 19:55:39,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 19:55:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3683 transitions. [2022-12-13 19:55:39,591 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42509233610341646 [2022-12-13 19:55:39,591 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3683 transitions. [2022-12-13 19:55:39,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3683 transitions. [2022-12-13 19:55:39,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:55:39,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3683 transitions. [2022-12-13 19:55:39,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 153.45833333333334) internal successors, (3683), 24 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:39,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 361.0) internal successors, (9025), 25 states have internal predecessors, (9025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:39,601 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 361.0) internal successors, (9025), 25 states have internal predecessors, (9025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:39,601 INFO L175 Difference]: Start difference. First operand has 126 places, 75 transitions, 565 flow. Second operand 24 states and 3683 transitions. [2022-12-13 19:55:39,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 446 transitions, 3425 flow [2022-12-13 19:55:40,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 446 transitions, 3401 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 19:55:40,222 INFO L231 Difference]: Finished difference. Result has 154 places, 103 transitions, 968 flow [2022-12-13 19:55:40,223 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=968, PETRI_PLACES=154, PETRI_TRANSITIONS=103} [2022-12-13 19:55:40,223 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 97 predicate places. [2022-12-13 19:55:40,223 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 103 transitions, 968 flow [2022-12-13 19:55:40,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 142.14285714285714) internal successors, (2985), 21 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:40,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:55:40,223 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:55:40,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-13 19:55:40,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:55:40,424 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:55:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:55:40,425 INFO L85 PathProgramCache]: Analyzing trace with hash -496857552, now seen corresponding path program 2 times [2022-12-13 19:55:40,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:55:40,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729579559] [2022-12-13 19:55:40,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:55:40,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:55:40,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:55:40,429 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:55:40,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 19:55:40,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:55:40,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:55:40,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 19:55:40,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:55:40,638 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:55:40,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:55:40,997 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 19:55:40,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:55:42,186 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 19:55:42,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:55:42,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729579559] [2022-12-13 19:55:42,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729579559] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:55:42,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:55:42,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 19:55:42,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101517152] [2022-12-13 19:55:42,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:55:42,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 19:55:42,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:55:42,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 19:55:42,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:55:51,694 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 361 [2022-12-13 19:55:51,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 103 transitions, 968 flow. Second operand has 18 states, 18 states have (on average 136.33333333333334) internal successors, (2454), 18 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 19:55:51,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:55:51,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 361 [2022-12-13 19:55:51,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:10,935 INFO L130 PetriNetUnfolder]: 32894/45952 cut-off events. [2022-12-13 19:56:10,935 INFO L131 PetriNetUnfolder]: For 269635/275170 co-relation queries the response was YES. [2022-12-13 19:56:11,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224138 conditions, 45952 events. 32894/45952 cut-off events. For 269635/275170 co-relation queries the response was YES. Maximal size of possible extension queue 2076. Compared 310382 event pairs, 9926 based on Foata normal form. 5771/51294 useless extension candidates. Maximal degree in co-relation 224079. Up to 17990 conditions per place. [2022-12-13 19:56:11,369 INFO L137 encePairwiseOnDemand]: 353/361 looper letters, 401 selfloop transitions, 29 changer transitions 0/438 dead transitions. [2022-12-13 19:56:11,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 438 transitions, 4559 flow [2022-12-13 19:56:11,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 19:56:11,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 19:56:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2785 transitions. [2022-12-13 19:56:11,375 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4060358652864849 [2022-12-13 19:56:11,375 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2785 transitions. [2022-12-13 19:56:11,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2785 transitions. [2022-12-13 19:56:11,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:11,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2785 transitions. [2022-12-13 19:56:11,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 146.57894736842104) internal successors, (2785), 19 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:11,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 361.0) internal successors, (7220), 20 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:11,382 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 361.0) internal successors, (7220), 20 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:11,382 INFO L175 Difference]: Start difference. First operand has 154 places, 103 transitions, 968 flow. Second operand 19 states and 2785 transitions. [2022-12-13 19:56:11,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 438 transitions, 4559 flow [2022-12-13 19:56:11,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 438 transitions, 4395 flow, removed 72 selfloop flow, removed 7 redundant places. [2022-12-13 19:56:11,917 INFO L231 Difference]: Finished difference. Result has 171 places, 111 transitions, 1070 flow [2022-12-13 19:56:11,917 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1070, PETRI_PLACES=171, PETRI_TRANSITIONS=111} [2022-12-13 19:56:11,918 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 114 predicate places. [2022-12-13 19:56:11,918 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 111 transitions, 1070 flow [2022-12-13 19:56:11,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 136.33333333333334) internal successors, (2454), 18 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 19:56:11,918 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:11,918 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:11,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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)] Forceful destruction successful, exit code 0 [2022-12-13 19:56:12,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:56:12,119 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:56:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:12,120 INFO L85 PathProgramCache]: Analyzing trace with hash -439698731, now seen corresponding path program 2 times [2022-12-13 19:56:12,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:56:12,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509754996] [2022-12-13 19:56:12,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:56:12,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:56:12,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:56:12,124 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:56:12,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 19:56:12,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:56:12,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:56:12,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 19:56:12,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:56:12,375 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:56:12,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:56:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:12,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:56:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:14,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:56:14,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509754996] [2022-12-13 19:56:14,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509754996] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:56:14,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:56:14,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 19:56:14,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891176275] [2022-12-13 19:56:14,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:56:14,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 19:56:14,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:56:14,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 19:56:14,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:56:25,219 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 361 [2022-12-13 19:56:25,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 111 transitions, 1070 flow. Second operand has 14 states, 14 states have (on average 136.71428571428572) internal successors, (1914), 14 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:25,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:25,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 361 [2022-12-13 19:56:25,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:41,797 INFO L130 PetriNetUnfolder]: 37249/52864 cut-off events. [2022-12-13 19:56:41,797 INFO L131 PetriNetUnfolder]: For 346578/355269 co-relation queries the response was YES. [2022-12-13 19:56:42,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265521 conditions, 52864 events. 37249/52864 cut-off events. For 346578/355269 co-relation queries the response was YES. Maximal size of possible extension queue 1956. Compared 357811 event pairs, 14073 based on Foata normal form. 10315/63156 useless extension candidates. Maximal degree in co-relation 265456. Up to 14724 conditions per place. [2022-12-13 19:56:42,317 INFO L137 encePairwiseOnDemand]: 353/361 looper letters, 414 selfloop transitions, 27 changer transitions 0/449 dead transitions. [2022-12-13 19:56:42,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 449 transitions, 4817 flow [2022-12-13 19:56:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 19:56:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 19:56:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2753 transitions. [2022-12-13 19:56:42,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4013704621664966 [2022-12-13 19:56:42,323 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2753 transitions. [2022-12-13 19:56:42,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2753 transitions. [2022-12-13 19:56:42,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:42,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2753 transitions. [2022-12-13 19:56:42,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 144.89473684210526) internal successors, (2753), 19 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:42,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 361.0) internal successors, (7220), 20 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:42,330 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 361.0) internal successors, (7220), 20 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:42,330 INFO L175 Difference]: Start difference. First operand has 171 places, 111 transitions, 1070 flow. Second operand 19 states and 2753 transitions. [2022-12-13 19:56:42,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 449 transitions, 4817 flow [2022-12-13 19:56:43,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 449 transitions, 4591 flow, removed 106 selfloop flow, removed 5 redundant places. [2022-12-13 19:56:43,261 INFO L231 Difference]: Finished difference. Result has 189 places, 121 transitions, 1191 flow [2022-12-13 19:56:43,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1191, PETRI_PLACES=189, PETRI_TRANSITIONS=121} [2022-12-13 19:56:43,261 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 132 predicate places. [2022-12-13 19:56:43,261 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 121 transitions, 1191 flow [2022-12-13 19:56:43,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 136.71428571428572) internal successors, (1914), 14 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:43,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:43,262 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 19:56:43,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-13 19:56:43,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:56:43,463 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:56:43,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:43,463 INFO L85 PathProgramCache]: Analyzing trace with hash -465848064, now seen corresponding path program 3 times [2022-12-13 19:56:43,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:56:43,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460038344] [2022-12-13 19:56:43,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:56:43,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:56:43,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:56:43,468 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:56:43,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-13 19:56:43,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 19:56:43,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:56:43,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 19:56:43,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:56:43,766 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:56:43,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:56:44,180 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 19:56:44,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:56:46,955 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 19:56:46,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:56:46,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460038344] [2022-12-13 19:56:46,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460038344] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:56:46,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:56:46,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 19:56:46,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694544254] [2022-12-13 19:56:46,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:56:46,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 19:56:46,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:56:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 19:56:46,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 19:57:04,302 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 361 [2022-12-13 19:57:04,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 121 transitions, 1191 flow. Second operand has 24 states, 24 states have (on average 147.0) internal successors, (3528), 24 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:04,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:57:04,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 361 [2022-12-13 19:57:04,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:57:38,608 INFO L130 PetriNetUnfolder]: 70299/97275 cut-off events. [2022-12-13 19:57:38,608 INFO L131 PetriNetUnfolder]: For 850111/869505 co-relation queries the response was YES. [2022-12-13 19:57:39,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545667 conditions, 97275 events. 70299/97275 cut-off events. For 850111/869505 co-relation queries the response was YES. Maximal size of possible extension queue 2722. Compared 653655 event pairs, 47425 based on Foata normal form. 19373/116475 useless extension candidates. Maximal degree in co-relation 545596. Up to 28629 conditions per place. [2022-12-13 19:57:39,807 INFO L137 encePairwiseOnDemand]: 357/361 looper letters, 733 selfloop transitions, 24 changer transitions 0/770 dead transitions. [2022-12-13 19:57:39,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 770 transitions, 7656 flow [2022-12-13 19:57:39,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 19:57:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 19:57:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3998 transitions. [2022-12-13 19:57:39,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.461449676823638 [2022-12-13 19:57:39,813 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3998 transitions. [2022-12-13 19:57:39,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3998 transitions. [2022-12-13 19:57:39,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:57:39,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3998 transitions. [2022-12-13 19:57:39,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 166.58333333333334) internal successors, (3998), 24 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:39,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 361.0) internal successors, (9025), 25 states have internal predecessors, (9025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:39,823 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 361.0) internal successors, (9025), 25 states have internal predecessors, (9025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:39,823 INFO L175 Difference]: Start difference. First operand has 189 places, 121 transitions, 1191 flow. Second operand 24 states and 3998 transitions. [2022-12-13 19:57:39,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 770 transitions, 7656 flow [2022-12-13 19:57:45,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 770 transitions, 7596 flow, removed 18 selfloop flow, removed 9 redundant places. [2022-12-13 19:57:45,961 INFO L231 Difference]: Finished difference. Result has 216 places, 134 transitions, 1342 flow [2022-12-13 19:57:45,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1342, PETRI_PLACES=216, PETRI_TRANSITIONS=134} [2022-12-13 19:57:45,961 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 159 predicate places. [2022-12-13 19:57:45,961 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 134 transitions, 1342 flow [2022-12-13 19:57:45,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 147.0) internal successors, (3528), 24 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:45,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:57:45,962 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:57:45,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 19:57:46,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:57:46,163 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:57:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:57:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2109729503, now seen corresponding path program 2 times [2022-12-13 19:57:46,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:57:46,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786129826] [2022-12-13 19:57:46,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:57:46,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:57:46,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:57:46,168 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:57:46,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-13 19:57:46,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:57:46,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:57:46,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 19:57:46,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:57:46,520 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:57:46,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:57:46,685 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 19:57:46,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:57:46,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:57:46,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786129826] [2022-12-13 19:57:46,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786129826] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:57:46,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:57:46,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:57:46,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48138679] [2022-12-13 19:57:46,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:57:46,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:57:46,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:57:46,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:57:46,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:57:47,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 361 [2022-12-13 19:57:47,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 134 transitions, 1342 flow. Second operand has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:47,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:57:47,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 361 [2022-12-13 19:57:47,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:58:04,223 INFO L130 PetriNetUnfolder]: 73161/102964 cut-off events. [2022-12-13 19:58:04,223 INFO L131 PetriNetUnfolder]: For 833972/851992 co-relation queries the response was YES. [2022-12-13 19:58:05,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555194 conditions, 102964 events. 73161/102964 cut-off events. For 833972/851992 co-relation queries the response was YES. Maximal size of possible extension queue 2241. Compared 690742 event pairs, 44685 based on Foata normal form. 26800/129660 useless extension candidates. Maximal degree in co-relation 555110. Up to 85727 conditions per place. [2022-12-13 19:58:05,609 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 169 selfloop transitions, 21 changer transitions 0/198 dead transitions. [2022-12-13 19:58:05,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 198 transitions, 2321 flow [2022-12-13 19:58:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:58:05,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:58:05,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 745 transitions. [2022-12-13 19:58:05,612 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41274238227146814 [2022-12-13 19:58:05,612 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 745 transitions. [2022-12-13 19:58:05,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 745 transitions. [2022-12-13 19:58:05,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:58:05,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 745 transitions. [2022-12-13 19:58:05,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:58:05,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:58:05,615 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:58:05,615 INFO L175 Difference]: Start difference. First operand has 216 places, 134 transitions, 1342 flow. Second operand 5 states and 745 transitions. [2022-12-13 19:58:05,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 198 transitions, 2321 flow [2022-12-13 19:58:13,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 198 transitions, 2265 flow, removed 17 selfloop flow, removed 10 redundant places. [2022-12-13 19:58:13,218 INFO L231 Difference]: Finished difference. Result has 210 places, 134 transitions, 1350 flow [2022-12-13 19:58:13,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1350, PETRI_PLACES=210, PETRI_TRANSITIONS=134} [2022-12-13 19:58:13,219 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 153 predicate places. [2022-12-13 19:58:13,219 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 134 transitions, 1350 flow [2022-12-13 19:58:13,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:58:13,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:58:13,219 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-12-13 19:58:13,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-13 19:58:13,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:58:13,420 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:58:13,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:58:13,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1493157405, now seen corresponding path program 4 times [2022-12-13 19:58:13,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:58:13,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94924338] [2022-12-13 19:58:13,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:58:13,424 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 19:58:13,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:58:13,427 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:58:13,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-13 19:58:13,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:58:13,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:58:13,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 19:58:13,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:58:13,791 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:58:13,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:58:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:58:14,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:58:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:58:16,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:58:16,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94924338] [2022-12-13 19:58:16,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94924338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:58:16,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:58:16,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 19:58:16,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104513177] [2022-12-13 19:58:16,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:58:16,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 19:58:16,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:58:16,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 19:58:16,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-12-13 19:58:33,858 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 361 [2022-12-13 19:58:33,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 134 transitions, 1350 flow. Second operand has 24 states, 24 states have (on average 140.08333333333334) internal successors, (3362), 24 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:58:33,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:58:33,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 361 [2022-12-13 19:58:33,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:59:17,934 INFO L130 PetriNetUnfolder]: 97421/134773 cut-off events. [2022-12-13 19:59:17,934 INFO L131 PetriNetUnfolder]: For 1679533/1712416 co-relation queries the response was YES. [2022-12-13 19:59:19,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793823 conditions, 134773 events. 97421/134773 cut-off events. For 1679533/1712416 co-relation queries the response was YES. Maximal size of possible extension queue 2532. Compared 916401 event pairs, 8621 based on Foata normal form. 49519/184024 useless extension candidates. Maximal degree in co-relation 793737. Up to 33165 conditions per place. [2022-12-13 19:59:19,999 INFO L137 encePairwiseOnDemand]: 354/361 looper letters, 711 selfloop transitions, 56 changer transitions 0/775 dead transitions. [2022-12-13 19:59:19,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 775 transitions, 7905 flow [2022-12-13 19:59:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 19:59:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 19:59:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5574 transitions. [2022-12-13 19:59:20,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4173092760350378 [2022-12-13 19:59:20,007 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5574 transitions. [2022-12-13 19:59:20,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5574 transitions. [2022-12-13 19:59:20,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:59:20,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5574 transitions. [2022-12-13 19:59:20,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 150.64864864864865) internal successors, (5574), 37 states have internal predecessors, (5574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:59:20,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 361.0) internal successors, (13718), 38 states have internal predecessors, (13718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:59:20,022 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 361.0) internal successors, (13718), 38 states have internal predecessors, (13718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:59:20,022 INFO L175 Difference]: Start difference. First operand has 210 places, 134 transitions, 1350 flow. Second operand 37 states and 5574 transitions. [2022-12-13 19:59:20,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 775 transitions, 7905 flow [2022-12-13 19:59:26,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 775 transitions, 7685 flow, removed 59 selfloop flow, removed 5 redundant places. [2022-12-13 19:59:26,717 INFO L231 Difference]: Finished difference. Result has 247 places, 147 transitions, 1583 flow [2022-12-13 19:59:26,718 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1583, PETRI_PLACES=247, PETRI_TRANSITIONS=147} [2022-12-13 19:59:26,718 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 190 predicate places. [2022-12-13 19:59:26,718 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 147 transitions, 1583 flow [2022-12-13 19:59:26,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 140.08333333333334) internal successors, (3362), 24 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:59:26,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:59:26,718 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:59:26,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-13 19:59:26,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:59:26,920 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:59:26,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:59:26,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1964546423, now seen corresponding path program 3 times [2022-12-13 19:59:26,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:59:26,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561900563] [2022-12-13 19:59:26,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:59:26,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:59:26,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:59:26,925 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:59:26,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-13 19:59:27,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 19:59:27,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:59:27,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 19:59:27,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:59:27,277 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:59:27,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:59:27,334 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 13 treesize of output 9 [2022-12-13 19:59:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:59:27,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:59:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:59:27,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:59:27,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561900563] [2022-12-13 19:59:27,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561900563] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:59:27,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:59:27,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 19:59:27,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587714936] [2022-12-13 19:59:27,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:59:27,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 19:59:27,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:59:27,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 19:59:27,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:59:31,039 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 361 [2022-12-13 19:59:31,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 147 transitions, 1583 flow. Second operand has 14 states, 14 states have (on average 138.57142857142858) internal successors, (1940), 14 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:59:31,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:59:31,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 361 [2022-12-13 19:59:31,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:59:56,606 INFO L130 PetriNetUnfolder]: 99480/137272 cut-off events. [2022-12-13 19:59:56,607 INFO L131 PetriNetUnfolder]: For 1789264/1819435 co-relation queries the response was YES. [2022-12-13 19:59:58,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830661 conditions, 137272 events. 99480/137272 cut-off events. For 1789264/1819435 co-relation queries the response was YES. Maximal size of possible extension queue 2414. Compared 907113 event pairs, 43726 based on Foata normal form. 30219/167368 useless extension candidates. Maximal degree in co-relation 830571. Up to 82552 conditions per place. [2022-12-13 19:59:58,846 INFO L137 encePairwiseOnDemand]: 354/361 looper letters, 262 selfloop transitions, 22 changer transitions 0/294 dead transitions. [2022-12-13 19:59:58,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 294 transitions, 3308 flow [2022-12-13 19:59:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:59:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:59:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2048 transitions. [2022-12-13 19:59:58,851 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40522358527898694 [2022-12-13 19:59:58,851 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2048 transitions. [2022-12-13 19:59:58,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2048 transitions. [2022-12-13 19:59:58,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:59:58,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2048 transitions. [2022-12-13 19:59:58,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 146.28571428571428) internal successors, (2048), 14 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:59:58,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 361.0) internal successors, (5415), 15 states have internal predecessors, (5415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:59:58,857 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 361.0) internal successors, (5415), 15 states have internal predecessors, (5415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:59:58,857 INFO L175 Difference]: Start difference. First operand has 247 places, 147 transitions, 1583 flow. Second operand 14 states and 2048 transitions. [2022-12-13 19:59:58,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 294 transitions, 3308 flow [2022-12-13 20:00:33,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 294 transitions, 2773 flow, removed 109 selfloop flow, removed 29 redundant places. [2022-12-13 20:00:33,441 INFO L231 Difference]: Finished difference. Result has 235 places, 146 transitions, 1368 flow [2022-12-13 20:00:33,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1368, PETRI_PLACES=235, PETRI_TRANSITIONS=146} [2022-12-13 20:00:33,441 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 178 predicate places. [2022-12-13 20:00:33,442 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 146 transitions, 1368 flow [2022-12-13 20:00:33,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 138.57142857142858) internal successors, (1940), 14 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:00:33,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:00:33,442 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 3, 1, 1, 1, 1, 1] [2022-12-13 20:00:33,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-12-13 20:00:33,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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 20:00:33,643 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 20:00:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:00:33,644 INFO L85 PathProgramCache]: Analyzing trace with hash 438021114, now seen corresponding path program 5 times [2022-12-13 20:00:33,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:00:33,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342119546] [2022-12-13 20:00:33,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:00:33,646 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 20:00:33,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:00:33,648 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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 20:00:33,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-13 20:00:33,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 20:00:33,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:00:33,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 20:00:33,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:00:33,953 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 20:00:33,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 20:00:34,255 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 7 treesize of output 5 [2022-12-13 20:00:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 20:00:34,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:00:34,611 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 20:00:34,628 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 20:00:34,629 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 20:00:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:00:36,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:00:36,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342119546] [2022-12-13 20:00:36,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342119546] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:00:36,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:00:36,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2022-12-13 20:00:36,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913751435] [2022-12-13 20:00:36,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:00:36,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 20:00:36,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:00:36,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 20:00:36,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-12-13 20:00:53,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 361 [2022-12-13 20:00:53,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 146 transitions, 1368 flow. Second operand has 23 states, 23 states have (on average 141.17391304347825) internal successors, (3247), 23 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:00:53,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:00:53,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 361 [2022-12-13 20:00:53,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:01:24,003 INFO L130 PetriNetUnfolder]: 92573/127979 cut-off events. [2022-12-13 20:01:24,003 INFO L131 PetriNetUnfolder]: For 1459398/1489550 co-relation queries the response was YES. [2022-12-13 20:01:25,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 698043 conditions, 127979 events. 92573/127979 cut-off events. For 1459398/1489550 co-relation queries the response was YES. Maximal size of possible extension queue 2487. Compared 839803 event pairs, 59381 based on Foata normal form. 30023/157502 useless extension candidates. Maximal degree in co-relation 697955. Up to 113916 conditions per place. [2022-12-13 20:01:25,691 INFO L137 encePairwiseOnDemand]: 352/361 looper letters, 355 selfloop transitions, 36 changer transitions 0/400 dead transitions. [2022-12-13 20:01:25,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 400 transitions, 3936 flow [2022-12-13 20:01:25,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 20:01:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 20:01:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3456 transitions. [2022-12-13 20:01:25,697 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41623509574852463 [2022-12-13 20:01:25,697 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3456 transitions. [2022-12-13 20:01:25,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3456 transitions. [2022-12-13 20:01:25,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:01:25,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3456 transitions. [2022-12-13 20:01:25,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 150.2608695652174) internal successors, (3456), 23 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:01:25,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 361.0) internal successors, (8664), 24 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:01:25,706 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 361.0) internal successors, (8664), 24 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:01:25,706 INFO L175 Difference]: Start difference. First operand has 235 places, 146 transitions, 1368 flow. Second operand 23 states and 3456 transitions. [2022-12-13 20:01:25,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 400 transitions, 3936 flow [2022-12-13 20:02:06,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 400 transitions, 3911 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-12-13 20:02:06,712 INFO L231 Difference]: Finished difference. Result has 251 places, 150 transitions, 1499 flow [2022-12-13 20:02:06,713 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1499, PETRI_PLACES=251, PETRI_TRANSITIONS=150} [2022-12-13 20:02:06,713 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 194 predicate places. [2022-12-13 20:02:06,713 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 150 transitions, 1499 flow [2022-12-13 20:02:06,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 141.17391304347825) internal successors, (3247), 23 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:02:06,714 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:02:06,714 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:02:06,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-12-13 20:02:06,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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 20:02:06,915 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 20:02:06,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:02:06,916 INFO L85 PathProgramCache]: Analyzing trace with hash -192621250, now seen corresponding path program 3 times [2022-12-13 20:02:06,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:02:06,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284160123] [2022-12-13 20:02:06,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:02:06,918 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 20:02:06,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:02:06,920 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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 20:02:06,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-13 20:02:07,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 20:02:07,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:02:07,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 20:02:07,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:02:07,384 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 20:02:07,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 20:02:07,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 90 [2022-12-13 20:02:07,835 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 7 treesize of output 5 [2022-12-13 20:02:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:02:07,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:02:08,422 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 20:02:08,518 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 20:02:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:02:10,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:02:10,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284160123] [2022-12-13 20:02:10,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284160123] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:02:10,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:02:10,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 20:02:10,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101296054] [2022-12-13 20:02:10,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:02:10,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 20:02:10,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:02:10,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 20:02:10,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:02:22,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 361 [2022-12-13 20:02:22,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 150 transitions, 1499 flow. Second operand has 12 states, 12 states have (on average 131.0) internal successors, (1572), 12 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:02:22,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:02:22,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 361 [2022-12-13 20:02:22,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:02:26,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:28,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:56,276 INFO L130 PetriNetUnfolder]: 119295/164835 cut-off events. [2022-12-13 20:02:56,277 INFO L131 PetriNetUnfolder]: For 1369080/1389552 co-relation queries the response was YES. [2022-12-13 20:02:58,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906872 conditions, 164835 events. 119295/164835 cut-off events. For 1369080/1389552 co-relation queries the response was YES. Maximal size of possible extension queue 2909. Compared 1126051 event pairs, 17913 based on Foata normal form. 32238/196966 useless extension candidates. Maximal degree in co-relation 906783. Up to 54960 conditions per place. [2022-12-13 20:02:58,886 INFO L137 encePairwiseOnDemand]: 356/361 looper letters, 345 selfloop transitions, 26 changer transitions 0/380 dead transitions. [2022-12-13 20:02:58,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 380 transitions, 4414 flow [2022-12-13 20:02:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:02:58,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 20:02:58,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 968 transitions. [2022-12-13 20:02:58,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38306292045904233 [2022-12-13 20:02:58,890 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 968 transitions. [2022-12-13 20:02:58,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 968 transitions. [2022-12-13 20:02:58,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:02:58,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 968 transitions. [2022-12-13 20:02:58,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 138.28571428571428) internal successors, (968), 7 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:02:58,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:02:58,892 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:02:58,893 INFO L175 Difference]: Start difference. First operand has 251 places, 150 transitions, 1499 flow. Second operand 7 states and 968 transitions. [2022-12-13 20:02:58,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 380 transitions, 4414 flow [2022-12-13 20:03:31,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 380 transitions, 4244 flow, removed 40 selfloop flow, removed 16 redundant places. [2022-12-13 20:03:31,971 INFO L231 Difference]: Finished difference. Result has 241 places, 151 transitions, 1508 flow [2022-12-13 20:03:31,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1508, PETRI_PLACES=241, PETRI_TRANSITIONS=151} [2022-12-13 20:03:31,972 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 184 predicate places. [2022-12-13 20:03:31,972 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 151 transitions, 1508 flow [2022-12-13 20:03:31,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.0) internal successors, (1572), 12 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:31,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:03:31,972 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:03:31,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-13 20:03:32,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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 20:03:32,173 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 20:03:32,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:32,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1997281044, now seen corresponding path program 4 times [2022-12-13 20:03:32,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:03:32,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772091061] [2022-12-13 20:03:32,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:03:32,176 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 20:03:32,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:03:32,179 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/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 20:03:32,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b6966f-b1d5-490a-a3b7-6530f3b417e3/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-13 20:03:32,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:03:32,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:03:32,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 20:03:32,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:32,562 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 20:03:32,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 20:03:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:33,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:35,056 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:03:35,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772091061] [2022-12-13 20:03:35,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772091061] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:35,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:03:35,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 20:03:35,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656064322] [2022-12-13 20:03:35,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:35,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 20:03:35,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:03:35,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 20:03:35,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-12-13 20:03:53,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 361 [2022-12-13 20:03:53,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 151 transitions, 1508 flow. Second operand has 23 states, 23 states have (on average 136.30434782608697) internal successors, (3135), 23 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:53,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:03:53,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 361 [2022-12-13 20:03:53,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:04:45,363 INFO L130 PetriNetUnfolder]: 119792/165867 cut-off events. [2022-12-13 20:04:45,363 INFO L131 PetriNetUnfolder]: For 2106309/2130678 co-relation queries the response was YES. [2022-12-13 20:04:47,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949362 conditions, 165867 events. 119792/165867 cut-off events. For 2106309/2130678 co-relation queries the response was YES. Maximal size of possible extension queue 3095. Compared 1137495 event pairs, 41773 based on Foata normal form. 25281/191097 useless extension candidates. Maximal degree in co-relation 949272. Up to 68982 conditions per place. [2022-12-13 20:04:48,190 INFO L137 encePairwiseOnDemand]: 353/361 looper letters, 779 selfloop transitions, 42 changer transitions 0/831 dead transitions. [2022-12-13 20:04:48,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 831 transitions, 8797 flow [2022-12-13 20:04:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 20:04:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 20:04:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4662 transitions. [2022-12-13 20:04:48,201 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4035664819944598 [2022-12-13 20:04:48,201 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4662 transitions. [2022-12-13 20:04:48,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4662 transitions. [2022-12-13 20:04:48,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:04:48,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4662 transitions. [2022-12-13 20:04:48,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 145.6875) internal successors, (4662), 32 states have internal predecessors, (4662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:48,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 361.0) internal successors, (11913), 33 states have internal predecessors, (11913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:48,217 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 361.0) internal successors, (11913), 33 states have internal predecessors, (11913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:48,217 INFO L175 Difference]: Start difference. First operand has 241 places, 151 transitions, 1508 flow. Second operand 32 states and 4662 transitions. [2022-12-13 20:04:48,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 831 transitions, 8797 flow