./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.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_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/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_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/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_c8237e79-9550-46aa-b27e-29c881f73a92/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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- 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 14:05:49,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:05:49,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:05:49,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:05:49,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:05:49,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:05:49,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:05:49,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:05:49,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:05:49,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:05:49,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:05:49,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:05:49,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:05:49,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:05:49,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:05:49,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:05:49,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:05:49,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:05:49,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:05:49,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:05:49,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:05:49,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:05:49,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:05:49,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:05:49,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:05:49,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:05:49,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:05:49,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:05:49,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:05:49,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:05:49,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:05:49,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:05:49,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:05:49,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:05:49,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:05:49,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:05:49,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:05:49,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:05:49,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:05:49,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:05:49,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:05:49,468 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 14:05:49,489 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:05:49,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:05:49,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:05:49,490 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:05:49,490 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:05:49,496 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:05:49,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:05:49,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:05:49,498 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:05:49,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:05:49,498 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:05:49,498 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:05:49,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:05:49,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:05:49,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:05:49,499 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:05:49,499 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:05:49,499 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:05:49,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:05:49,499 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:05:49,499 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:05:49,500 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:05:49,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:05:49,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:05:49,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:05:49,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:05:49,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:05:49,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:05:49,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:05:49,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:05:49,501 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:05:49,501 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:05:49,501 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:05:49,501 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:05:49,502 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_c8237e79-9550-46aa-b27e-29c881f73a92/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2022-12-13 14:05:49,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:05:49,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:05:49,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:05:49,704 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:05:49,704 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:05:49,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-12-13 14:05:52,221 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:05:52,396 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:05:52,396 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-12-13 14:05:52,402 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/data/9ae36a823/c8b485234e5f48489449d3320d6791bb/FLAGd055b743e [2022-12-13 14:05:52,802 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/data/9ae36a823/c8b485234e5f48489449d3320d6791bb [2022-12-13 14:05:52,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:05:52,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:05:52,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:05:52,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:05:52,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:05:52,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:05:52" (1/1) ... [2022-12-13 14:05:52,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20256e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:52, skipping insertion in model container [2022-12-13 14:05:52,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:05:52" (1/1) ... [2022-12-13 14:05:52,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:05:52,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:05:52,961 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:52,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:52,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:52,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:52,967 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:52,968 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:52,968 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:52,969 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:52,969 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:52,970 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:52,970 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:52,971 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:52,971 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:52,971 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:52,978 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_c8237e79-9550-46aa-b27e-29c881f73a92/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-12-13 14:05:52,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:05:52,993 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 14:05:52,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7c323b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:52, skipping insertion in model container [2022-12-13 14:05:52,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:05:52,994 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 14:05:52,995 INFO L158 Benchmark]: Toolchain (without parser) took 184.79ms. Allocated memory is still 132.1MB. Free memory was 97.3MB in the beginning and 86.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 14:05:52,996 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 132.1MB. Free memory is still 99.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:05:52,996 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.32ms. Allocated memory is still 132.1MB. Free memory was 97.0MB in the beginning and 86.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 14:05:52,998 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 132.1MB. Free memory is still 99.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 181.32ms. Allocated memory is still 132.1MB. Free memory was 97.0MB in the beginning and 86.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: 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_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/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_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/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_c8237e79-9550-46aa-b27e-29c881f73a92/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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- 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 14:05:54,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:05:54,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:05:54,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:05:54,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:05:54,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:05:54,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:05:54,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:05:54,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:05:54,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:05:54,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:05:54,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:05:54,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:05:54,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:05:54,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:05:54,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:05:54,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:05:54,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:05:54,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:05:54,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:05:54,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:05:54,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:05:54,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:05:54,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:05:54,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:05:54,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:05:54,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:05:54,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:05:54,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:05:54,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:05:54,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:05:54,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:05:54,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:05:54,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:05:54,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:05:54,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:05:54,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:05:54,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:05:54,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:05:54,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:05:54,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:05:54,492 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 14:05:54,514 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:05:54,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:05:54,515 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:05:54,515 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:05:54,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:05:54,515 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:05:54,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:05:54,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:05:54,516 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:05:54,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:05:54,517 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:05:54,517 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:05:54,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:05:54,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:05:54,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:05:54,517 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:05:54,518 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:05:54,518 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:05:54,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:05:54,518 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:05:54,518 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 14:05:54,518 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 14:05:54,518 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:05:54,519 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:05:54,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:05:54,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:05:54,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:05:54,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:05:54,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:05:54,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:05:54,520 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 14:05:54,520 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 14:05:54,520 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:05:54,520 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:05:54,521 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:05:54,521 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 14:05:54,521 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:05:54,521 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_c8237e79-9550-46aa-b27e-29c881f73a92/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2022-12-13 14:05:54,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:05:54,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:05:54,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:05:54,775 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:05:54,776 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:05:54,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-12-13 14:05:57,338 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:05:57,500 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:05:57,500 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-12-13 14:05:57,506 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/data/57245227f/5f8183dc5f3647e5859d4efeb41340a1/FLAGbe43a9d89 [2022-12-13 14:05:57,520 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/data/57245227f/5f8183dc5f3647e5859d4efeb41340a1 [2022-12-13 14:05:57,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:05:57,524 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:05:57,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:05:57,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:05:57,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:05:57,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:05:57" (1/1) ... [2022-12-13 14:05:57,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e3622b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:57, skipping insertion in model container [2022-12-13 14:05:57,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:05:57" (1/1) ... [2022-12-13 14:05:57,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:05:57,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:05:57,664 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,666 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,668 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,669 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,671 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,672 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,672 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,673 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,673 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,674 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,674 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,675 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,675 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,675 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,680 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_c8237e79-9550-46aa-b27e-29c881f73a92/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-12-13 14:05:57,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:05:57,697 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 14:05:57,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:05:57,703 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,703 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,704 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,705 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,706 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,706 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,706 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,707 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,707 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,708 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,708 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,708 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,709 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,709 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,711 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_c8237e79-9550-46aa-b27e-29c881f73a92/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-12-13 14:05:57,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:05:57,718 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:05:57,727 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,728 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,729 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,729 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,730 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,730 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,731 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,731 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,731 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,732 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,732 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,733 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,733 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:05:57,733 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:05:57,736 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_c8237e79-9550-46aa-b27e-29c881f73a92/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-12-13 14:05:57,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:05:57,750 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:05:57,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:57 WrapperNode [2022-12-13 14:05:57,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:05:57,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:05:57,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:05:57,751 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:05:57,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:57" (1/1) ... [2022-12-13 14:05:57,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:57" (1/1) ... [2022-12-13 14:05:57,797 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 148 [2022-12-13 14:05:57,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:05:57,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:05:57,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:05:57,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:05:57,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:57" (1/1) ... [2022-12-13 14:05:57,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:57" (1/1) ... [2022-12-13 14:05:57,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:57" (1/1) ... [2022-12-13 14:05:57,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:57" (1/1) ... [2022-12-13 14:05:57,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:57" (1/1) ... [2022-12-13 14:05:57,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:57" (1/1) ... [2022-12-13 14:05:57,823 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:57" (1/1) ... [2022-12-13 14:05:57,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:57" (1/1) ... [2022-12-13 14:05:57,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:05:57,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:05:57,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:05:57,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:05:57,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:57" (1/1) ... [2022-12-13 14:05:57,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:05:57,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:05:57,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:05:57,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:05:57,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:05:57,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 14:05:57,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:05:57,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 14:05:57,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 14:05:57,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 14:05:57,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 14:05:57,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 14:05:57,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 14:05:57,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 14:05:57,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 14:05:57,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:05:57,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:05:57,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:05:57,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 14:05:57,890 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 14:05:57,987 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:05:57,989 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:05:58,335 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:05:58,401 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:05:58,402 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 14:05:58,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:05:58 BoogieIcfgContainer [2022-12-13 14:05:58,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:05:58,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:05:58,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:05:58,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:05:58,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:05:57" (1/3) ... [2022-12-13 14:05:58,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3489944d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:05:58, skipping insertion in model container [2022-12-13 14:05:58,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:05:57" (2/3) ... [2022-12-13 14:05:58,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3489944d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:05:58, skipping insertion in model container [2022-12-13 14:05:58,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:05:58" (3/3) ... [2022-12-13 14:05:58,412 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2022-12-13 14:05:58,429 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:05:58,430 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-12-13 14:05:58,430 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:05:58,489 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 14:05:58,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 159 transitions, 334 flow [2022-12-13 14:05:58,592 INFO L130 PetriNetUnfolder]: 11/157 cut-off events. [2022-12-13 14:05:58,592 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:05:58,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 157 events. 11/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 207 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2022-12-13 14:05:58,599 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 159 transitions, 334 flow [2022-12-13 14:05:58,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 152 transitions, 316 flow [2022-12-13 14:05:58,608 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:05:58,618 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 152 transitions, 316 flow [2022-12-13 14:05:58,620 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 152 transitions, 316 flow [2022-12-13 14:05:58,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 152 transitions, 316 flow [2022-12-13 14:05:58,651 INFO L130 PetriNetUnfolder]: 11/152 cut-off events. [2022-12-13 14:05:58,652 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:05:58,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 152 events. 11/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2022-12-13 14:05:58,654 INFO L119 LiptonReduction]: Number of co-enabled transitions 1984 [2022-12-13 14:06:12,449 INFO L134 LiptonReduction]: Checked pairs total: 2307 [2022-12-13 14:06:12,449 INFO L136 LiptonReduction]: Total number of compositions: 162 [2022-12-13 14:06:12,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:06:12,463 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;@33c0ff9a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:06:12,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2022-12-13 14:06:12,465 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 14:06:12,465 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:06:12,466 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:12,466 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:06:12,466 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:06:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash 21466, now seen corresponding path program 1 times [2022-12-13 14:06:12,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:12,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810089855] [2022-12-13 14:06:12,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:06:12,484 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 14:06:12,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:12,485 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:12,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:06:12,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:06:12,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:12,685 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 14:06:12,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 14:06:12,721 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 14:06:12,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:06:12,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:12,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810089855] [2022-12-13 14:06:12,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810089855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:06:12,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:06:12,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:06:12,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423119687] [2022-12-13 14:06:12,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:06:12,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:06:12,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:12,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:06:12,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:06:12,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 321 [2022-12-13 14:06:12,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:12,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:06:12,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 321 [2022-12-13 14:06:12,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:06:13,304 INFO L130 PetriNetUnfolder]: 1065/1520 cut-off events. [2022-12-13 14:06:13,304 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-12-13 14:06:13,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3076 conditions, 1520 events. 1065/1520 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 7482 event pairs, 528 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 1356. Up to 756 conditions per place. [2022-12-13 14:06:13,315 INFO L137 encePairwiseOnDemand]: 317/321 looper letters, 60 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2022-12-13 14:06:13,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 64 transitions, 276 flow [2022-12-13 14:06:13,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:06:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:06:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2022-12-13 14:06:13,330 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49117341640706125 [2022-12-13 14:06:13,331 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2022-12-13 14:06:13,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2022-12-13 14:06:13,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:06:13,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2022-12-13 14:06:13,337 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 14:06:13,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:13,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:13,343 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 82 flow. Second operand 3 states and 473 transitions. [2022-12-13 14:06:13,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 64 transitions, 276 flow [2022-12-13 14:06:13,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 64 transitions, 260 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 14:06:13,348 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 84 flow [2022-12-13 14:06:13,349 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2022-12-13 14:06:13,352 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2022-12-13 14:06:13,352 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 84 flow [2022-12-13 14:06:13,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:13,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:13,352 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:06:13,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:13,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:13,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:06:13,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:13,554 INFO L85 PathProgramCache]: Analyzing trace with hash 21465, now seen corresponding path program 1 times [2022-12-13 14:06:13,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:13,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655712198] [2022-12-13 14:06:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:06:13,554 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 14:06:13,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:13,555 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:13,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:06:13,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:06:13,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:13,620 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 14:06:13,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 14:06:13,627 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 14:06:13,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:06:13,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:13,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655712198] [2022-12-13 14:06:13,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655712198] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:06:13,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:06:13,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:06:13,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96130353] [2022-12-13 14:06:13,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:06:13,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:06:13,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:13,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:06:13,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:06:13,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 321 [2022-12-13 14:06:13,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:13,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:06:13,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 321 [2022-12-13 14:06:13,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:06:13,978 INFO L130 PetriNetUnfolder]: 1065/1518 cut-off events. [2022-12-13 14:06:13,979 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:06:13,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3047 conditions, 1518 events. 1065/1518 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 7459 event pairs, 528 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 1521. Up to 1506 conditions per place. [2022-12-13 14:06:13,984 INFO L137 encePairwiseOnDemand]: 319/321 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2022-12-13 14:06:13,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 146 flow [2022-12-13 14:06:13,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:06:13,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:06:13,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2022-12-13 14:06:13,987 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4569055036344756 [2022-12-13 14:06:13,987 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2022-12-13 14:06:13,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2022-12-13 14:06:13,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:06:13,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2022-12-13 14:06:13,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:13,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:13,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:13,990 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 84 flow. Second operand 3 states and 440 transitions. [2022-12-13 14:06:13,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 146 flow [2022-12-13 14:06:13,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:06:13,991 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 82 flow [2022-12-13 14:06:13,991 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2022-12-13 14:06:13,991 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2022-12-13 14:06:13,992 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 82 flow [2022-12-13 14:06:13,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:13,992 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:13,992 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:06:14,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:14,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:14,194 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:06:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash 21587, now seen corresponding path program 1 times [2022-12-13 14:06:14,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:14,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826130420] [2022-12-13 14:06:14,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:06:14,200 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 14:06:14,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:14,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:14,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:06:14,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:06:14,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:14,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:06:14,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:06:14,327 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:06:14,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-13 14:06:14,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 14:06:14,369 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 14:06:14,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:06:14,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:14,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826130420] [2022-12-13 14:06:14,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826130420] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:06:14,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:06:14,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:06:14,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062989895] [2022-12-13 14:06:14,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:06:14,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:06:14,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:14,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:06:14,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:06:14,531 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 321 [2022-12-13 14:06:14,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:14,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:06:14,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 321 [2022-12-13 14:06:14,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:06:14,813 INFO L130 PetriNetUnfolder]: 805/1172 cut-off events. [2022-12-13 14:06:14,813 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:06:14,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2355 conditions, 1172 events. 805/1172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 5742 event pairs, 396 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 2347. Up to 1160 conditions per place. [2022-12-13 14:06:14,822 INFO L137 encePairwiseOnDemand]: 318/321 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2022-12-13 14:06:14,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 138 flow [2022-12-13 14:06:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:06:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:06:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2022-12-13 14:06:14,824 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45586708203530635 [2022-12-13 14:06:14,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2022-12-13 14:06:14,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2022-12-13 14:06:14,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:06:14,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2022-12-13 14:06:14,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:14,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:14,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:14,828 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 82 flow. Second operand 3 states and 439 transitions. [2022-12-13 14:06:14,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 138 flow [2022-12-13 14:06:14,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 137 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:06:14,829 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 79 flow [2022-12-13 14:06:14,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2022-12-13 14:06:14,829 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2022-12-13 14:06:14,829 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 79 flow [2022-12-13 14:06:14,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:14,830 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:14,830 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:06:14,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:15,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:15,031 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:06:15,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:15,032 INFO L85 PathProgramCache]: Analyzing trace with hash 21585, now seen corresponding path program 1 times [2022-12-13 14:06:15,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:15,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429217955] [2022-12-13 14:06:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:06:15,033 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 14:06:15,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:15,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:15,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:06:15,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:06:15,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:15,175 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-12-13 14:06:15,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-12-13 14:06:15,193 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 14:06:15,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:06:15,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:15,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429217955] [2022-12-13 14:06:15,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429217955] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:06:15,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:06:15,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:06:15,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321921072] [2022-12-13 14:06:15,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:06:15,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:06:15,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:06:15,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:06:15,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 321 [2022-12-13 14:06:15,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:15,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:06:15,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 321 [2022-12-13 14:06:15,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:06:15,473 INFO L130 PetriNetUnfolder]: 545/826 cut-off events. [2022-12-13 14:06:15,473 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:06:15,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 826 events. 545/826 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 4020 event pairs, 264 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 1655. Up to 814 conditions per place. [2022-12-13 14:06:15,479 INFO L137 encePairwiseOnDemand]: 318/321 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-12-13 14:06:15,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 131 flow [2022-12-13 14:06:15,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:06:15,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:06:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2022-12-13 14:06:15,481 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2022-12-13 14:06:15,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2022-12-13 14:06:15,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2022-12-13 14:06:15,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:06:15,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2022-12-13 14:06:15,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:15,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:15,488 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:15,489 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 79 flow. Second operand 3 states and 428 transitions. [2022-12-13 14:06:15,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 131 flow [2022-12-13 14:06:15,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:06:15,490 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 76 flow [2022-12-13 14:06:15,490 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2022-12-13 14:06:15,491 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2022-12-13 14:06:15,491 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 76 flow [2022-12-13 14:06:15,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:15,492 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:15,492 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:06:15,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:15,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:15,694 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:06:15,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:15,695 INFO L85 PathProgramCache]: Analyzing trace with hash 669180, now seen corresponding path program 1 times [2022-12-13 14:06:15,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:15,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968920683] [2022-12-13 14:06:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:06:15,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:06:15,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:15,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:15,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:06:15,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 14:06:15,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:15,820 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 14:06:15,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 14:06:15,877 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 14:06:15,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:06:16,054 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 14:06:16,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:16,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968920683] [2022-12-13 14:06:16,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968920683] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:06:16,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:06:16,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 14:06:16,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066811760] [2022-12-13 14:06:16,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:06:16,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:06:16,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:16,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:06:16,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:06:16,676 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 321 [2022-12-13 14:06:16,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 132.0) internal successors, (792), 6 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:16,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:06:16,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 321 [2022-12-13 14:06:16,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:06:17,188 INFO L130 PetriNetUnfolder]: 819/1242 cut-off events. [2022-12-13 14:06:17,188 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 14:06:17,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2501 conditions, 1242 events. 819/1242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 6334 event pairs, 396 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 2491. Up to 408 conditions per place. [2022-12-13 14:06:17,197 INFO L137 encePairwiseOnDemand]: 317/321 looper letters, 74 selfloop transitions, 7 changer transitions 0/83 dead transitions. [2022-12-13 14:06:17,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 83 transitions, 358 flow [2022-12-13 14:06:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:06:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:06:17,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 870 transitions. [2022-12-13 14:06:17,202 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4517133956386293 [2022-12-13 14:06:17,202 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 870 transitions. [2022-12-13 14:06:17,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 870 transitions. [2022-12-13 14:06:17,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:06:17,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 870 transitions. [2022-12-13 14:06:17,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:17,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 321.0) internal successors, (2247), 7 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:17,214 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 321.0) internal successors, (2247), 7 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:17,214 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 76 flow. Second operand 6 states and 870 transitions. [2022-12-13 14:06:17,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 83 transitions, 358 flow [2022-12-13 14:06:17,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:06:17,220 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 129 flow [2022-12-13 14:06:17,220 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2022-12-13 14:06:17,220 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2022-12-13 14:06:17,220 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 129 flow [2022-12-13 14:06:17,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 132.0) internal successors, (792), 6 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:17,221 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:17,221 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:06:17,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:17,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:17,422 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:06:17,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:17,422 INFO L85 PathProgramCache]: Analyzing trace with hash 20759668, now seen corresponding path program 1 times [2022-12-13 14:06:17,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:17,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685072620] [2022-12-13 14:06:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:06:17,423 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 14:06:17,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:17,424 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:17,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:06:17,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 14:06:17,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:17,508 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 14:06:17,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2022-12-13 14:06:17,524 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 14:06:17,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:06:17,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:17,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685072620] [2022-12-13 14:06:17,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685072620] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:06:17,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:06:17,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:06:17,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843190118] [2022-12-13 14:06:17,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:06:17,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:06:17,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:17,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:06:17,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:06:17,601 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 321 [2022-12-13 14:06:17,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:17,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:06:17,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 321 [2022-12-13 14:06:17,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:06:17,795 INFO L130 PetriNetUnfolder]: 759/1143 cut-off events. [2022-12-13 14:06:17,795 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 14:06:17,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2329 conditions, 1143 events. 759/1143 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 5765 event pairs, 366 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 2314. Up to 1125 conditions per place. [2022-12-13 14:06:17,798 INFO L137 encePairwiseOnDemand]: 318/321 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2022-12-13 14:06:17,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 33 transitions, 187 flow [2022-12-13 14:06:17,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:06:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:06:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2022-12-13 14:06:17,800 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4423676012461059 [2022-12-13 14:06:17,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2022-12-13 14:06:17,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2022-12-13 14:06:17,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:06:17,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2022-12-13 14:06:17,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:17,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:17,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:17,802 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 129 flow. Second operand 3 states and 426 transitions. [2022-12-13 14:06:17,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 33 transitions, 187 flow [2022-12-13 14:06:17,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 177 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 14:06:17,803 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 117 flow [2022-12-13 14:06:17,803 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2022-12-13 14:06:17,804 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2022-12-13 14:06:17,804 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 117 flow [2022-12-13 14:06:17,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:17,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:17,804 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:06:17,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:18,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:18,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:06:18,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:18,005 INFO L85 PathProgramCache]: Analyzing trace with hash 20759669, now seen corresponding path program 1 times [2022-12-13 14:06:18,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:18,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728889297] [2022-12-13 14:06:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:06:18,005 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 14:06:18,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:18,006 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:18,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:06:18,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:06:18,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:18,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:06:18,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:06:18,088 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:06:18,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-13 14:06:18,093 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 14:06:18,111 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 14:06:18,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:06:18,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:18,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728889297] [2022-12-13 14:06:18,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728889297] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:06:18,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:06:18,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:06:18,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961174153] [2022-12-13 14:06:18,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:06:18,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:06:18,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:18,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:06:18,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:06:18,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 321 [2022-12-13 14:06:18,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:18,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:06:18,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 321 [2022-12-13 14:06:18,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:06:18,388 INFO L130 PetriNetUnfolder]: 699/1044 cut-off events. [2022-12-13 14:06:18,388 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-13 14:06:18,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2128 conditions, 1044 events. 699/1044 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 5175 event pairs, 336 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 2112. Up to 1026 conditions per place. [2022-12-13 14:06:18,391 INFO L137 encePairwiseOnDemand]: 318/321 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2022-12-13 14:06:18,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 171 flow [2022-12-13 14:06:18,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:06:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:06:18,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2022-12-13 14:06:18,393 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44963655244029077 [2022-12-13 14:06:18,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2022-12-13 14:06:18,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2022-12-13 14:06:18,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:06:18,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2022-12-13 14:06:18,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:18,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:18,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:18,398 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 117 flow. Second operand 3 states and 433 transitions. [2022-12-13 14:06:18,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 171 flow [2022-12-13 14:06:18,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:06:18,400 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 114 flow [2022-12-13 14:06:18,401 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2022-12-13 14:06:18,401 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2022-12-13 14:06:18,401 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 114 flow [2022-12-13 14:06:18,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:18,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:18,402 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 14:06:18,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:18,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:18,602 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:06:18,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:18,603 INFO L85 PathProgramCache]: Analyzing trace with hash 643544860, now seen corresponding path program 1 times [2022-12-13 14:06:18,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:18,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387037360] [2022-12-13 14:06:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:06:18,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 14:06:18,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:18,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:18,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:06:18,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:06:18,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:18,665 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 14:06:18,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:06:18,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:18,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387037360] [2022-12-13 14:06:18,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387037360] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:06:18,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:06:18,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:06:18,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881699029] [2022-12-13 14:06:18,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:06:18,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:06:18,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:18,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:06:18,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:06:18,712 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 321 [2022-12-13 14:06:18,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:18,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:06:18,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 321 [2022-12-13 14:06:18,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:06:18,986 INFO L130 PetriNetUnfolder]: 594/1068 cut-off events. [2022-12-13 14:06:18,987 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-12-13 14:06:18,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2183 conditions, 1068 events. 594/1068 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6014 event pairs, 195 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 2166. Up to 457 conditions per place. [2022-12-13 14:06:18,989 INFO L137 encePairwiseOnDemand]: 314/321 looper letters, 55 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2022-12-13 14:06:18,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 297 flow [2022-12-13 14:06:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:06:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:06:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 725 transitions. [2022-12-13 14:06:18,991 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4517133956386293 [2022-12-13 14:06:18,991 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 725 transitions. [2022-12-13 14:06:18,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 725 transitions. [2022-12-13 14:06:18,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:06:18,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 725 transitions. [2022-12-13 14:06:18,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:18,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:18,994 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:18,994 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 114 flow. Second operand 5 states and 725 transitions. [2022-12-13 14:06:18,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 297 flow [2022-12-13 14:06:18,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:06:18,995 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 161 flow [2022-12-13 14:06:18,995 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2022-12-13 14:06:18,996 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2022-12-13 14:06:18,996 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 161 flow [2022-12-13 14:06:18,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:18,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:18,996 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 14:06:19,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:19,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:19,197 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:06:19,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:19,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1535587238, now seen corresponding path program 2 times [2022-12-13 14:06:19,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:19,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61789507] [2022-12-13 14:06:19,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:06:19,197 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 14:06:19,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:19,198 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:19,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:19,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:06:19,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:06:19,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 14:06:19,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:19,324 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 14:06:19,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 14:06:19,465 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 14:06:19,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:06:20,151 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 14:06:20,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:20,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61789507] [2022-12-13 14:06:20,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61789507] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:06:20,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:06:20,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 14:06:20,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457207703] [2022-12-13 14:06:20,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:06:20,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 14:06:20,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 14:06:20,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 14:06:22,844 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 321 [2022-12-13 14:06:22,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 161 flow. Second operand has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:22,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:06:22,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 321 [2022-12-13 14:06:22,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:06:26,400 INFO L130 PetriNetUnfolder]: 2072/3524 cut-off events. [2022-12-13 14:06:26,400 INFO L131 PetriNetUnfolder]: For 2110/2269 co-relation queries the response was YES. [2022-12-13 14:06:26,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9735 conditions, 3524 events. 2072/3524 cut-off events. For 2110/2269 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23376 event pairs, 1230 based on Foata normal form. 154/2336 useless extension candidates. Maximal degree in co-relation 9713. Up to 921 conditions per place. [2022-12-13 14:06:26,411 INFO L137 encePairwiseOnDemand]: 317/321 looper letters, 232 selfloop transitions, 12 changer transitions 0/247 dead transitions. [2022-12-13 14:06:26,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 247 transitions, 1435 flow [2022-12-13 14:06:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 14:06:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 14:06:26,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1804 transitions. [2022-12-13 14:06:26,415 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4683281412253375 [2022-12-13 14:06:26,415 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1804 transitions. [2022-12-13 14:06:26,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1804 transitions. [2022-12-13 14:06:26,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:06:26,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1804 transitions. [2022-12-13 14:06:26,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 150.33333333333334) internal successors, (1804), 12 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:26,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 321.0) internal successors, (4173), 13 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:26,421 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 321.0) internal successors, (4173), 13 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:26,421 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 161 flow. Second operand 12 states and 1804 transitions. [2022-12-13 14:06:26,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 247 transitions, 1435 flow [2022-12-13 14:06:26,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 247 transitions, 1435 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:06:26,426 INFO L231 Difference]: Finished difference. Result has 66 places, 42 transitions, 259 flow [2022-12-13 14:06:26,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=259, PETRI_PLACES=66, PETRI_TRANSITIONS=42} [2022-12-13 14:06:26,426 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 27 predicate places. [2022-12-13 14:06:26,426 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 42 transitions, 259 flow [2022-12-13 14:06:26,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:26,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:26,427 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:06:26,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:26,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:26,629 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:06:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:26,630 INFO L85 PathProgramCache]: Analyzing trace with hash -23575894, now seen corresponding path program 1 times [2022-12-13 14:06:26,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:26,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050992597] [2022-12-13 14:06:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:06:26,631 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 14:06:26,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:26,634 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:26,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:06:26,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 14:06:26,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:06:26,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:06:26,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:26,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050992597] [2022-12-13 14:06:26,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050992597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:06:26,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:06:26,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:06:26,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732645430] [2022-12-13 14:06:26,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:06:26,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:06:26,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:26,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:06:26,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:06:26,855 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 321 [2022-12-13 14:06:26,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 42 transitions, 259 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:26,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:06:26,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 321 [2022-12-13 14:06:26,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:06:27,344 INFO L130 PetriNetUnfolder]: 1874/3204 cut-off events. [2022-12-13 14:06:27,345 INFO L131 PetriNetUnfolder]: For 1985/2171 co-relation queries the response was YES. [2022-12-13 14:06:27,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8881 conditions, 3204 events. 1874/3204 cut-off events. For 1985/2171 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21376 event pairs, 1116 based on Foata normal form. 145/2059 useless extension candidates. Maximal degree in co-relation 8850. Up to 3137 conditions per place. [2022-12-13 14:06:27,360 INFO L137 encePairwiseOnDemand]: 313/321 looper letters, 47 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2022-12-13 14:06:27,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 53 transitions, 391 flow [2022-12-13 14:06:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:06:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:06:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 584 transitions. [2022-12-13 14:06:27,362 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45482866043613707 [2022-12-13 14:06:27,362 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 584 transitions. [2022-12-13 14:06:27,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 584 transitions. [2022-12-13 14:06:27,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:06:27,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 584 transitions. [2022-12-13 14:06:27,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:27,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:27,365 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:27,365 INFO L175 Difference]: Start difference. First operand has 66 places, 42 transitions, 259 flow. Second operand 4 states and 584 transitions. [2022-12-13 14:06:27,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 53 transitions, 391 flow [2022-12-13 14:06:27,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 53 transitions, 366 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-12-13 14:06:27,370 INFO L231 Difference]: Finished difference. Result has 67 places, 43 transitions, 264 flow [2022-12-13 14:06:27,370 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=264, PETRI_PLACES=67, PETRI_TRANSITIONS=43} [2022-12-13 14:06:27,371 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 28 predicate places. [2022-12-13 14:06:27,371 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 43 transitions, 264 flow [2022-12-13 14:06:27,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:27,371 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:27,371 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:06:27,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 14:06:27,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:27,573 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:06:27,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:27,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2104518088, now seen corresponding path program 1 times [2022-12-13 14:06:27,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:27,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082643130] [2022-12-13 14:06:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:06:27,576 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 14:06:27,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:27,579 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:27,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:06:27,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 14:06:27,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:27,727 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 14:06:27,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 14:06:27,855 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 14:06:27,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:06:28,564 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 14:06:28,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:28,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082643130] [2022-12-13 14:06:28,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082643130] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:06:28,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:06:28,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 14:06:28,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872751081] [2022-12-13 14:06:28,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:06:28,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:06:28,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:28,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:06:28,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:06:31,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 321 [2022-12-13 14:06:31,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 43 transitions, 264 flow. Second operand has 8 states, 8 states have (on average 128.75) internal successors, (1030), 8 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:31,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:06:31,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 321 [2022-12-13 14:06:31,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:06:34,571 INFO L130 PetriNetUnfolder]: 1613/2787 cut-off events. [2022-12-13 14:06:34,572 INFO L131 PetriNetUnfolder]: For 2135/2273 co-relation queries the response was YES. [2022-12-13 14:06:34,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8410 conditions, 2787 events. 1613/2787 cut-off events. For 2135/2273 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 18451 event pairs, 954 based on Foata normal form. 128/2123 useless extension candidates. Maximal degree in co-relation 8376. Up to 2092 conditions per place. [2022-12-13 14:06:34,580 INFO L137 encePairwiseOnDemand]: 314/321 looper letters, 79 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2022-12-13 14:06:34,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 92 transitions, 628 flow [2022-12-13 14:06:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 14:06:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 14:06:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1222 transitions. [2022-12-13 14:06:34,583 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4229837313949463 [2022-12-13 14:06:34,583 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1222 transitions. [2022-12-13 14:06:34,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1222 transitions. [2022-12-13 14:06:34,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:06:34,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1222 transitions. [2022-12-13 14:06:34,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 135.77777777777777) internal successors, (1222), 9 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:34,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:34,588 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:34,588 INFO L175 Difference]: Start difference. First operand has 67 places, 43 transitions, 264 flow. Second operand 9 states and 1222 transitions. [2022-12-13 14:06:34,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 92 transitions, 628 flow [2022-12-13 14:06:34,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 92 transitions, 618 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 14:06:34,592 INFO L231 Difference]: Finished difference. Result has 75 places, 44 transitions, 297 flow [2022-12-13 14:06:34,592 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=297, PETRI_PLACES=75, PETRI_TRANSITIONS=44} [2022-12-13 14:06:34,592 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 36 predicate places. [2022-12-13 14:06:34,592 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 44 transitions, 297 flow [2022-12-13 14:06:34,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 128.75) internal successors, (1030), 8 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:34,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:34,593 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:06:34,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:34,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:34,794 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:06:34,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:34,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2104518087, now seen corresponding path program 1 times [2022-12-13 14:06:34,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:34,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72811792] [2022-12-13 14:06:34,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:06:34,795 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 14:06:34,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:34,797 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:34,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:06:34,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 14:06:34,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:34,896 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 14:06:34,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 14:06:34,916 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 14:06:34,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:06:34,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:34,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72811792] [2022-12-13 14:06:34,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72811792] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:06:34,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:06:34,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:06:34,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840491687] [2022-12-13 14:06:34,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:06:34,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:06:34,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:34,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:06:34,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:06:35,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 321 [2022-12-13 14:06:35,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 44 transitions, 297 flow. Second operand has 4 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:35,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:06:35,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 321 [2022-12-13 14:06:35,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:06:35,380 INFO L130 PetriNetUnfolder]: 890/1620 cut-off events. [2022-12-13 14:06:35,380 INFO L131 PetriNetUnfolder]: For 2884/3029 co-relation queries the response was YES. [2022-12-13 14:06:35,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5471 conditions, 1620 events. 890/1620 cut-off events. For 2884/3029 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9825 event pairs, 504 based on Foata normal form. 273/1653 useless extension candidates. Maximal degree in co-relation 5435. Up to 1568 conditions per place. [2022-12-13 14:06:35,386 INFO L137 encePairwiseOnDemand]: 316/321 looper letters, 31 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2022-12-13 14:06:35,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 41 transitions, 359 flow [2022-12-13 14:06:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:06:35,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:06:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 543 transitions. [2022-12-13 14:06:35,387 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42289719626168226 [2022-12-13 14:06:35,387 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 543 transitions. [2022-12-13 14:06:35,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 543 transitions. [2022-12-13 14:06:35,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:06:35,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 543 transitions. [2022-12-13 14:06:35,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:35,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:35,390 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:35,390 INFO L175 Difference]: Start difference. First operand has 75 places, 44 transitions, 297 flow. Second operand 4 states and 543 transitions. [2022-12-13 14:06:35,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 41 transitions, 359 flow [2022-12-13 14:06:35,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 41 transitions, 316 flow, removed 10 selfloop flow, removed 8 redundant places. [2022-12-13 14:06:35,393 INFO L231 Difference]: Finished difference. Result has 67 places, 41 transitions, 254 flow [2022-12-13 14:06:35,393 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=67, PETRI_TRANSITIONS=41} [2022-12-13 14:06:35,394 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 28 predicate places. [2022-12-13 14:06:35,394 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 41 transitions, 254 flow [2022-12-13 14:06:35,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:35,394 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:35,394 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:06:35,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-12-13 14:06:35,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:35,595 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:06:35,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:35,596 INFO L85 PathProgramCache]: Analyzing trace with hash 85400106, now seen corresponding path program 2 times [2022-12-13 14:06:35,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:35,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360625082] [2022-12-13 14:06:35,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:06:35,597 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 14:06:35,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:35,600 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:35,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:35,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 14:06:35,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:06:35,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 14:06:35,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:35,734 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 14:06:35,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 14:06:35,842 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 14:06:35,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:06:35,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:35,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360625082] [2022-12-13 14:06:35,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360625082] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:06:35,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:06:35,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:06:35,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422155395] [2022-12-13 14:06:35,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:06:35,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:06:35,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:35,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:06:35,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:06:36,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 321 [2022-12-13 14:06:36,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 41 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:36,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:06:36,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 321 [2022-12-13 14:06:36,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:06:36,315 INFO L130 PetriNetUnfolder]: 436/854 cut-off events. [2022-12-13 14:06:36,315 INFO L131 PetriNetUnfolder]: For 2039/2129 co-relation queries the response was YES. [2022-12-13 14:06:36,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2523 conditions, 854 events. 436/854 cut-off events. For 2039/2129 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4737 event pairs, 225 based on Foata normal form. 193/956 useless extension candidates. Maximal degree in co-relation 2490. Up to 806 conditions per place. [2022-12-13 14:06:36,317 INFO L137 encePairwiseOnDemand]: 316/321 looper letters, 28 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2022-12-13 14:06:36,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 38 transitions, 298 flow [2022-12-13 14:06:36,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:06:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:06:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 552 transitions. [2022-12-13 14:06:36,319 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42990654205607476 [2022-12-13 14:06:36,319 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 552 transitions. [2022-12-13 14:06:36,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 552 transitions. [2022-12-13 14:06:36,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:06:36,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 552 transitions. [2022-12-13 14:06:36,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:36,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:36,321 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:36,321 INFO L175 Difference]: Start difference. First operand has 67 places, 41 transitions, 254 flow. Second operand 4 states and 552 transitions. [2022-12-13 14:06:36,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 38 transitions, 298 flow [2022-12-13 14:06:36,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 38 transitions, 287 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 14:06:36,323 INFO L231 Difference]: Finished difference. Result has 63 places, 38 transitions, 231 flow [2022-12-13 14:06:36,323 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=63, PETRI_TRANSITIONS=38} [2022-12-13 14:06:36,324 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 24 predicate places. [2022-12-13 14:06:36,324 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 38 transitions, 231 flow [2022-12-13 14:06:36,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:36,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:36,324 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 14:06:36,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:36,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:36,525 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:06:36,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:36,526 INFO L85 PathProgramCache]: Analyzing trace with hash 852822298, now seen corresponding path program 3 times [2022-12-13 14:06:36,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:36,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916916730] [2022-12-13 14:06:36,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:06:36,528 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 14:06:36,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:36,540 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:36,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:36,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 14:06:36,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:06:36,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 14:06:36,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:36,810 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 14:06:36,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 14:06:37,194 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 14:06:37,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:06:40,020 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 14:06:40,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:40,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916916730] [2022-12-13 14:06:40,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916916730] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:06:40,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:06:40,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 14:06:40,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7753478] [2022-12-13 14:06:40,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:06:40,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:06:40,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:40,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:06:40,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:06:54,238 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 321 [2022-12-13 14:06:54,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 38 transitions, 231 flow. Second operand has 24 states, 24 states have (on average 133.0) internal successors, (3192), 24 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:54,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:06:54,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 321 [2022-12-13 14:06:54,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:07:11,117 INFO L130 PetriNetUnfolder]: 1124/2178 cut-off events. [2022-12-13 14:07:11,117 INFO L131 PetriNetUnfolder]: For 3058/3213 co-relation queries the response was YES. [2022-12-13 14:07:11,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6422 conditions, 2178 events. 1124/2178 cut-off events. For 3058/3213 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12938 event pairs, 576 based on Foata normal form. 164/2308 useless extension candidates. Maximal degree in co-relation 6391. Up to 547 conditions per place. [2022-12-13 14:07:11,126 INFO L137 encePairwiseOnDemand]: 317/321 looper letters, 370 selfloop transitions, 24 changer transitions 0/397 dead transitions. [2022-12-13 14:07:11,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 397 transitions, 2534 flow [2022-12-13 14:07:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 14:07:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 14:07:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3511 transitions. [2022-12-13 14:07:11,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4557372793354102 [2022-12-13 14:07:11,134 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3511 transitions. [2022-12-13 14:07:11,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3511 transitions. [2022-12-13 14:07:11,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:07:11,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3511 transitions. [2022-12-13 14:07:11,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 146.29166666666666) internal successors, (3511), 24 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:11,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 321.0) internal successors, (8025), 25 states have internal predecessors, (8025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:11,154 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 321.0) internal successors, (8025), 25 states have internal predecessors, (8025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:11,154 INFO L175 Difference]: Start difference. First operand has 63 places, 38 transitions, 231 flow. Second operand 24 states and 3511 transitions. [2022-12-13 14:07:11,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 397 transitions, 2534 flow [2022-12-13 14:07:11,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 397 transitions, 2509 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:07:11,165 INFO L231 Difference]: Finished difference. Result has 97 places, 51 transitions, 409 flow [2022-12-13 14:07:11,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=409, PETRI_PLACES=97, PETRI_TRANSITIONS=51} [2022-12-13 14:07:11,166 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 58 predicate places. [2022-12-13 14:07:11,166 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 51 transitions, 409 flow [2022-12-13 14:07:11,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 133.0) internal successors, (3192), 24 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:11,167 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:07:11,167 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:07:11,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 14:07:11,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:07:11,368 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:07:11,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:07:11,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1091173005, now seen corresponding path program 1 times [2022-12-13 14:07:11,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:07:11,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655060324] [2022-12-13 14:07:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:07:11,369 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 14:07:11,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:07:11,370 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:07:11,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:07:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:07:11,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 14:07:11,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:07:11,459 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 14:07:11,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:07:11,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:07:11,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655060324] [2022-12-13 14:07:11,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655060324] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:07:11,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:07:11,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:07:11,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909098662] [2022-12-13 14:07:11,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:07:11,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:07:11,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:07:11,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:07:11,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:07:11,465 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 321 [2022-12-13 14:07:11,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 51 transitions, 409 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:11,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:07:11,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 321 [2022-12-13 14:07:11,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:07:11,890 INFO L130 PetriNetUnfolder]: 1544/2912 cut-off events. [2022-12-13 14:07:11,890 INFO L131 PetriNetUnfolder]: For 3455/3608 co-relation queries the response was YES. [2022-12-13 14:07:11,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8552 conditions, 2912 events. 1544/2912 cut-off events. For 3455/3608 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 17382 event pairs, 576 based on Foata normal form. 153/2831 useless extension candidates. Maximal degree in co-relation 8508. Up to 1901 conditions per place. [2022-12-13 14:07:11,901 INFO L137 encePairwiseOnDemand]: 318/321 looper letters, 48 selfloop transitions, 2 changer transitions 8/60 dead transitions. [2022-12-13 14:07:11,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 60 transitions, 555 flow [2022-12-13 14:07:11,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:07:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:07:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2022-12-13 14:07:11,904 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46417445482866043 [2022-12-13 14:07:11,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2022-12-13 14:07:11,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2022-12-13 14:07:11,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:07:11,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2022-12-13 14:07:11,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:11,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:11,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:11,908 INFO L175 Difference]: Start difference. First operand has 97 places, 51 transitions, 409 flow. Second operand 3 states and 447 transitions. [2022-12-13 14:07:11,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 60 transitions, 555 flow [2022-12-13 14:07:11,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 60 transitions, 507 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-12-13 14:07:11,920 INFO L231 Difference]: Finished difference. Result has 90 places, 48 transitions, 347 flow [2022-12-13 14:07:11,920 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=90, PETRI_TRANSITIONS=48} [2022-12-13 14:07:11,920 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 51 predicate places. [2022-12-13 14:07:11,921 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 48 transitions, 347 flow [2022-12-13 14:07:11,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:11,921 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:07:11,921 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:07:11,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:07:12,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:07:12,122 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:07:12,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:07:12,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1644507595, now seen corresponding path program 1 times [2022-12-13 14:07:12,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:07:12,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266981400] [2022-12-13 14:07:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:07:12,123 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 14:07:12,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:07:12,124 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:07:12,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:07:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:07:12,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:07:12,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:07:12,292 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 14:07:12,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 14:07:12,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:07:12,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-12-13 14:07:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:07:12,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:07:12,716 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 188 treesize of output 184 [2022-12-13 14:07:12,872 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-13 14:07:12,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 188 [2022-12-13 14:07:12,880 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 114 treesize of output 110 [2022-12-13 14:07:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:07:16,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:07:16,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266981400] [2022-12-13 14:07:16,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266981400] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:07:16,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:07:16,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 14:07:16,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573241397] [2022-12-13 14:07:16,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:07:16,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 14:07:16,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:07:16,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 14:07:16,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 14:07:18,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 321 [2022-12-13 14:07:18,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 48 transitions, 347 flow. Second operand has 12 states, 12 states have (on average 126.83333333333333) internal successors, (1522), 12 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:18,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:07:18,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 321 [2022-12-13 14:07:18,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:07:19,935 INFO L130 PetriNetUnfolder]: 1443/2727 cut-off events. [2022-12-13 14:07:19,935 INFO L131 PetriNetUnfolder]: For 2450/2490 co-relation queries the response was YES. [2022-12-13 14:07:19,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8159 conditions, 2727 events. 1443/2727 cut-off events. For 2450/2490 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 14501 event pairs, 80 based on Foata normal form. 20/2667 useless extension candidates. Maximal degree in co-relation 8113. Up to 881 conditions per place. [2022-12-13 14:07:19,945 INFO L137 encePairwiseOnDemand]: 315/321 looper letters, 55 selfloop transitions, 6 changer transitions 9/71 dead transitions. [2022-12-13 14:07:19,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 71 transitions, 567 flow [2022-12-13 14:07:19,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:07:19,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 14:07:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 912 transitions. [2022-12-13 14:07:19,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40587449933244324 [2022-12-13 14:07:19,948 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 912 transitions. [2022-12-13 14:07:19,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 912 transitions. [2022-12-13 14:07:19,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:07:19,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 912 transitions. [2022-12-13 14:07:19,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.28571428571428) internal successors, (912), 7 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:19,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:19,953 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:19,953 INFO L175 Difference]: Start difference. First operand has 90 places, 48 transitions, 347 flow. Second operand 7 states and 912 transitions. [2022-12-13 14:07:19,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 71 transitions, 567 flow [2022-12-13 14:07:19,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 71 transitions, 544 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-12-13 14:07:19,965 INFO L231 Difference]: Finished difference. Result has 90 places, 50 transitions, 364 flow [2022-12-13 14:07:19,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=364, PETRI_PLACES=90, PETRI_TRANSITIONS=50} [2022-12-13 14:07:19,966 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 51 predicate places. [2022-12-13 14:07:19,966 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 50 transitions, 364 flow [2022-12-13 14:07:19,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 126.83333333333333) internal successors, (1522), 12 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:19,966 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:07:19,966 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:07:19,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:07:20,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:07:20,167 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:07:20,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:07:20,168 INFO L85 PathProgramCache]: Analyzing trace with hash -458867898, now seen corresponding path program 2 times [2022-12-13 14:07:20,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:07:20,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791389089] [2022-12-13 14:07:20,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:07:20,170 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 14:07:20,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:07:20,173 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:07:20,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:07:20,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:07:20,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:07:20,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:07:20,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:07:20,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-13 14:07:20,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 14:07:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:07:20,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:07:20,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:07:20,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 350 treesize of output 210 [2022-12-13 14:07:20,727 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 210 treesize of output 206 [2022-12-13 14:07:20,733 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 206 treesize of output 202 [2022-12-13 14:07:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:07:21,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:07:21,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791389089] [2022-12-13 14:07:21,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791389089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:07:21,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:07:21,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2022-12-13 14:07:21,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513614913] [2022-12-13 14:07:21,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:07:21,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 14:07:21,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:07:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 14:07:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-12-13 14:07:22,407 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 321 [2022-12-13 14:07:22,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 50 transitions, 364 flow. Second operand has 14 states, 14 states have (on average 124.35714285714286) internal successors, (1741), 14 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:22,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:07:22,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 321 [2022-12-13 14:07:22,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:07:24,149 INFO L130 PetriNetUnfolder]: 2349/4373 cut-off events. [2022-12-13 14:07:24,149 INFO L131 PetriNetUnfolder]: For 3057/3057 co-relation queries the response was YES. [2022-12-13 14:07:24,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12904 conditions, 4373 events. 2349/4373 cut-off events. For 3057/3057 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 25547 event pairs, 268 based on Foata normal form. 172/4545 useless extension candidates. Maximal degree in co-relation 12859. Up to 1482 conditions per place. [2022-12-13 14:07:24,161 INFO L137 encePairwiseOnDemand]: 313/321 looper letters, 51 selfloop transitions, 8 changer transitions 47/106 dead transitions. [2022-12-13 14:07:24,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 106 transitions, 754 flow [2022-12-13 14:07:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 14:07:24,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 14:07:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2038 transitions. [2022-12-13 14:07:24,165 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3968068535825545 [2022-12-13 14:07:24,165 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2038 transitions. [2022-12-13 14:07:24,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2038 transitions. [2022-12-13 14:07:24,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:07:24,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2038 transitions. [2022-12-13 14:07:24,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 127.375) internal successors, (2038), 16 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:24,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 321.0) internal successors, (5457), 17 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:24,171 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 321.0) internal successors, (5457), 17 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:24,171 INFO L175 Difference]: Start difference. First operand has 90 places, 50 transitions, 364 flow. Second operand 16 states and 2038 transitions. [2022-12-13 14:07:24,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 106 transitions, 754 flow [2022-12-13 14:07:24,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 106 transitions, 740 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-12-13 14:07:24,184 INFO L231 Difference]: Finished difference. Result has 111 places, 52 transitions, 421 flow [2022-12-13 14:07:24,184 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=421, PETRI_PLACES=111, PETRI_TRANSITIONS=52} [2022-12-13 14:07:24,184 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 72 predicate places. [2022-12-13 14:07:24,184 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 52 transitions, 421 flow [2022-12-13 14:07:24,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 124.35714285714286) internal successors, (1741), 14 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:07:24,185 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:07:24,185 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:07:24,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-12-13 14:07:24,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:07:24,386 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-12-13 14:07:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:07:24,387 INFO L85 PathProgramCache]: Analyzing trace with hash -975578397, now seen corresponding path program 3 times [2022-12-13 14:07:24,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:07:24,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23791904] [2022-12-13 14:07:24,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:07:24,389 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 14:07:24,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:07:24,392 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:07:24,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8237e79-9550-46aa-b27e-29c881f73a92/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:07:24,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 14:07:24,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:07:24,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:07:24,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:07:24,962 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 14:07:25,000 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 21 treesize of output 17 [2022-12-13 14:07:25,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:07:25,676 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 28 case distinctions, treesize of input 181 treesize of output 39 [2022-12-13 14:07:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:07:25,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:07:30,841 INFO L321 Elim1Store]: treesize reduction 888, result has 19.1 percent of original size [2022-12-13 14:07:30,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 714 treesize of output 570 [2022-12-13 14:07:30,862 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 323 treesize of output 315 [2022-12-13 14:07:30,882 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 315 treesize of output 307 [2022-12-13 14:11:56,922 WARN L233 SmtUtils]: Spent 5.40s on a formula simplification that was a NOOP. DAG size: 3521 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-13 14:15:42,619 WARN L233 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 6887 DAG size of output: 6887 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-13 14:16:03,770 WARN L233 SmtUtils]: Spent 9.46s on a formula simplification. DAG size of input: 4559 DAG size of output: 4559 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-13 14:18:55,689 WARN L233 SmtUtils]: Spent 7.96s on a formula simplification that was a NOOP. DAG size: 7526 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)