./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.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_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/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_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/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_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --- 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 11:07:26,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:07:26,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:07:26,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:07:26,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:07:26,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:07:26,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:07:26,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:07:26,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:07:26,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:07:26,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:07:26,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:07:26,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:07:26,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:07:26,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:07:26,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:07:26,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:07:26,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:07:26,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:07:26,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:07:26,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:07:26,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:07:26,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:07:26,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:07:26,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:07:26,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:07:26,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:07:26,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:07:26,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:07:26,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:07:26,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:07:26,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:07:26,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:07:26,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:07:26,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:07:26,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:07:26,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:07:26,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:07:26,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:07:26,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:07:26,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:07:26,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 11:07:26,329 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:07:26,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:07:26,330 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:07:26,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:07:26,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:07:26,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:07:26,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:07:26,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:07:26,337 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:07:26,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:07:26,338 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:07:26,338 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:07:26,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:07:26,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:07:26,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:07:26,338 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:07:26,338 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:07:26,338 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:07:26,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:07:26,339 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:07:26,339 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:07:26,339 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:07:26,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:07:26,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:07:26,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:07:26,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:07:26,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:07:26,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:07:26,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:07:26,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:07:26,340 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:07:26,340 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:07:26,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:07:26,340 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:07:26,340 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_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a [2022-12-13 11:07:26,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:07:26,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:07:26,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:07:26,538 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:07:26,539 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:07:26,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-12-13 11:07:29,105 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:07:29,271 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:07:29,272 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-12-13 11:07:29,276 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/data/a0cc57399/91456a667978432cbd9bb2d740cffa8b/FLAGf34ad26b1 [2022-12-13 11:07:29,683 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/data/a0cc57399/91456a667978432cbd9bb2d740cffa8b [2022-12-13 11:07:29,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:07:29,686 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:07:29,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:07:29,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:07:29,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:07:29,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:07:29" (1/1) ... [2022-12-13 11:07:29,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ef16e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:29, skipping insertion in model container [2022-12-13 11:07:29,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:07:29" (1/1) ... [2022-12-13 11:07:29,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:07:29,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:07:29,832 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:29,835 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:29,836 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:29,837 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:29,839 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:29,840 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:29,840 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:29,841 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:29,843 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:29,843 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:29,851 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_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-12-13 11:07:29,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:07:29,869 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 11:07:29,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6a2d1213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:29, skipping insertion in model container [2022-12-13 11:07:29,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:07:29,870 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 11:07:29,871 INFO L158 Benchmark]: Toolchain (without parser) took 184.73ms. Allocated memory is still 134.2MB. Free memory was 100.1MB in the beginning and 89.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 11:07:29,871 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 134.2MB. Free memory is still 101.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 11:07:29,872 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.06ms. Allocated memory is still 134.2MB. Free memory was 99.7MB in the beginning and 89.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 11:07:29,873 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 134.2MB. Free memory is still 101.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 183.06ms. Allocated memory is still 134.2MB. Free memory was 99.7MB in the beginning and 89.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: 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_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/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_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/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_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --- 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 11:07:31,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:07:31,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:07:31,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:07:31,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:07:31,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:07:31,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:07:31,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:07:31,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:07:31,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:07:31,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:07:31,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:07:31,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:07:31,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:07:31,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:07:31,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:07:31,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:07:31,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:07:31,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:07:31,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:07:31,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:07:31,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:07:31,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:07:31,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:07:31,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:07:31,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:07:31,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:07:31,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:07:31,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:07:31,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:07:31,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:07:31,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:07:31,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:07:31,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:07:31,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:07:31,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:07:31,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:07:31,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:07:31,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:07:31,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:07:31,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:07:31,181 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 11:07:31,197 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:07:31,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:07:31,197 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:07:31,197 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:07:31,198 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:07:31,198 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:07:31,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:07:31,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:07:31,199 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:07:31,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:07:31,199 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:07:31,199 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:07:31,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:07:31,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:07:31,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:07:31,200 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:07:31,200 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:07:31,200 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:07:31,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:07:31,201 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:07:31,201 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 11:07:31,201 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 11:07:31,201 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:07:31,201 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:07:31,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:07:31,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:07:31,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:07:31,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:07:31,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:07:31,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:07:31,203 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 11:07:31,203 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 11:07:31,203 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:07:31,203 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:07:31,203 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:07:31,203 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 11:07:31,204 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:07:31,204 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_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a [2022-12-13 11:07:31,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:07:31,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:07:31,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:07:31,452 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:07:31,452 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:07:31,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-12-13 11:07:33,985 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:07:34,148 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:07:34,148 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-12-13 11:07:34,154 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/data/f268c83f7/a3231bf0219649ed880fa45362d85c0b/FLAG1ddb59fb6 [2022-12-13 11:07:34,548 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/data/f268c83f7/a3231bf0219649ed880fa45362d85c0b [2022-12-13 11:07:34,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:07:34,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:07:34,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:07:34,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:07:34,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:07:34,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:07:34" (1/1) ... [2022-12-13 11:07:34,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ab841a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:34, skipping insertion in model container [2022-12-13 11:07:34,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:07:34" (1/1) ... [2022-12-13 11:07:34,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:07:34,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:07:34,696 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,699 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,700 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,701 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,704 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,706 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,706 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,708 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,709 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,709 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,717 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_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-12-13 11:07:34,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:07:34,739 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 11:07:34,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:07:34,747 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,748 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,748 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,749 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,749 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,750 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,750 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,751 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,752 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,753 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,756 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_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-12-13 11:07:34,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:07:34,763 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:07:34,774 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,775 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,776 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,776 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,777 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,777 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,777 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,778 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,779 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:07:34,779 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:07:34,782 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_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-12-13 11:07:34,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:07:34,809 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:07:34,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:34 WrapperNode [2022-12-13 11:07:34,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:07:34,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:07:34,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:07:34,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:07:34,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:34" (1/1) ... [2022-12-13 11:07:34,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:34" (1/1) ... [2022-12-13 11:07:34,851 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 186 [2022-12-13 11:07:34,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:07:34,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:07:34,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:07:34,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:07:34,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:34" (1/1) ... [2022-12-13 11:07:34,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:34" (1/1) ... [2022-12-13 11:07:34,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:34" (1/1) ... [2022-12-13 11:07:34,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:34" (1/1) ... [2022-12-13 11:07:34,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:34" (1/1) ... [2022-12-13 11:07:34,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:34" (1/1) ... [2022-12-13 11:07:34,873 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:34" (1/1) ... [2022-12-13 11:07:34,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:34" (1/1) ... [2022-12-13 11:07:34,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:07:34,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:07:34,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:07:34,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:07:34,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:34" (1/1) ... [2022-12-13 11:07:34,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:07:34,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:07:34,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:07:34,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:07:34,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:07:34,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 11:07:34,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:07:34,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 11:07:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 11:07:34,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 11:07:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 11:07:34,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 11:07:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 11:07:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 11:07:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 11:07:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:07:34,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:07:34,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:07:34,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 11:07:34,940 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 11:07:35,040 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:07:35,042 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:07:35,477 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:07:35,552 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:07:35,552 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 11:07:35,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:07:35 BoogieIcfgContainer [2022-12-13 11:07:35,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:07:35,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:07:35,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:07:35,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:07:35,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:07:34" (1/3) ... [2022-12-13 11:07:35,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc9d66f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:07:35, skipping insertion in model container [2022-12-13 11:07:35,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:07:34" (2/3) ... [2022-12-13 11:07:35,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc9d66f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:07:35, skipping insertion in model container [2022-12-13 11:07:35,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:07:35" (3/3) ... [2022-12-13 11:07:35,560 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2022-12-13 11:07:35,573 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:07:35,573 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-12-13 11:07:35,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:07:35,625 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 11:07:35,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 212 transitions, 440 flow [2022-12-13 11:07:35,704 INFO L130 PetriNetUnfolder]: 15/210 cut-off events. [2022-12-13 11:07:35,704 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:07:35,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 210 events. 15/210 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 219 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 166. Up to 2 conditions per place. [2022-12-13 11:07:35,708 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 212 transitions, 440 flow [2022-12-13 11:07:35,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 205 transitions, 422 flow [2022-12-13 11:07:35,715 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:07:35,722 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 205 transitions, 422 flow [2022-12-13 11:07:35,724 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 205 transitions, 422 flow [2022-12-13 11:07:35,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 205 transitions, 422 flow [2022-12-13 11:07:35,753 INFO L130 PetriNetUnfolder]: 15/205 cut-off events. [2022-12-13 11:07:35,753 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:07:35,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 205 events. 15/205 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 218 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 166. Up to 2 conditions per place. [2022-12-13 11:07:35,755 INFO L119 LiptonReduction]: Number of co-enabled transitions 1390 [2022-12-13 11:07:56,224 INFO L134 LiptonReduction]: Checked pairs total: 3295 [2022-12-13 11:07:56,224 INFO L136 LiptonReduction]: Total number of compositions: 229 [2022-12-13 11:07:56,234 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:07:56,238 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;@6293e48d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:07:56,238 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-12-13 11:07:56,240 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 11:07:56,240 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:07:56,240 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:07:56,241 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:07:56,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:07:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:56,245 INFO L85 PathProgramCache]: Analyzing trace with hash 27863, now seen corresponding path program 1 times [2022-12-13 11:07:56,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:07:56,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437361117] [2022-12-13 11:07:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:56,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:07:56,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:07:56,255 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:07:56,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:07:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:56,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:07:56,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:56,406 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 11:07:56,406 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 11:07:56,427 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 11:07:56,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:07:56,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:07:56,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437361117] [2022-12-13 11:07:56,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437361117] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:07:56,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:07:56,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:07:56,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734084928] [2022-12-13 11:07:56,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:07:56,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:07:56,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:07:56,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:07:56,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:07:56,576 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 441 [2022-12-13 11:07:56,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:56,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:07:56,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 441 [2022-12-13 11:07:56,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:07:56,886 INFO L130 PetriNetUnfolder]: 653/995 cut-off events. [2022-12-13 11:07:56,886 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 11:07:56,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 995 events. 653/995 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 4806 event pairs, 425 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 1859. Up to 988 conditions per place. [2022-12-13 11:07:56,892 INFO L137 encePairwiseOnDemand]: 434/441 looper letters, 40 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-12-13 11:07:56,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 42 transitions, 178 flow [2022-12-13 11:07:56,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:07:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:07:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2022-12-13 11:07:56,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2022-12-13 11:07:56,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2022-12-13 11:07:56,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2022-12-13 11:07:56,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:07:56,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2022-12-13 11:07:56,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:56,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:56,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:56,921 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 108 flow. Second operand 3 states and 581 transitions. [2022-12-13 11:07:56,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 42 transitions, 178 flow [2022-12-13 11:07:56,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 170 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 11:07:56,926 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 90 flow [2022-12-13 11:07:56,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2022-12-13 11:07:56,930 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2022-12-13 11:07:56,930 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 90 flow [2022-12-13 11:07:56,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:56,930 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:07:56,930 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:07:56,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:07:57,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:07:57,132 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:07:57,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:57,132 INFO L85 PathProgramCache]: Analyzing trace with hash 27864, now seen corresponding path program 1 times [2022-12-13 11:07:57,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:07:57,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116931257] [2022-12-13 11:07:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:57,133 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 11:07:57,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:07:57,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:07:57,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:07:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:57,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:07:57,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:57,238 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:07:57,239 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 11:07:57,253 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 11:07:57,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:07:57,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:07:57,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116931257] [2022-12-13 11:07:57,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116931257] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:07:57,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:07:57,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:07:57,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272059807] [2022-12-13 11:07:57,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:07:57,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:07:57,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:07:57,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:07:57,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:07:57,445 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 441 [2022-12-13 11:07:57,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:57,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:07:57,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 441 [2022-12-13 11:07:57,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:07:57,778 INFO L130 PetriNetUnfolder]: 654/999 cut-off events. [2022-12-13 11:07:57,778 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:07:57,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 999 events. 654/999 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 4772 event pairs, 425 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 2001. Up to 989 conditions per place. [2022-12-13 11:07:57,791 INFO L137 encePairwiseOnDemand]: 432/441 looper letters, 41 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2022-12-13 11:07:57,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 188 flow [2022-12-13 11:07:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:07:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:07:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2022-12-13 11:07:57,795 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4414210128495843 [2022-12-13 11:07:57,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2022-12-13 11:07:57,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2022-12-13 11:07:57,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:07:57,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2022-12-13 11:07:57,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 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 11:07:57,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:57,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:57,801 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 90 flow. Second operand 3 states and 584 transitions. [2022-12-13 11:07:57,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 188 flow [2022-12-13 11:07:57,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:07:57,803 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 127 flow [2022-12-13 11:07:57,803 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2022-12-13 11:07:57,804 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2022-12-13 11:07:57,804 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 127 flow [2022-12-13 11:07:57,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:57,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:07:57,805 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:07:57,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:07:58,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:07:58,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:07:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:58,009 INFO L85 PathProgramCache]: Analyzing trace with hash 869886, now seen corresponding path program 1 times [2022-12-13 11:07:58,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:07:58,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549881309] [2022-12-13 11:07:58,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:07:58,013 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 11:07:58,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:07:58,016 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:07:58,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:07:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:07:58,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:07:58,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:58,182 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:07:58,182 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 11:07:58,251 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 11:07:58,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:07:58,437 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 11:07:58,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:07:58,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549881309] [2022-12-13 11:07:58,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549881309] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:07:58,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:07:58,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 11:07:58,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65626170] [2022-12-13 11:07:58,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:07:58,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:07:58,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:07:58,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:07:58,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:07:59,294 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 441 [2022-12-13 11:07:59,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:07:59,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:07:59,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 441 [2022-12-13 11:07:59,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:01,049 INFO L130 PetriNetUnfolder]: 1316/2004 cut-off events. [2022-12-13 11:08:01,049 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:08:01,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4060 conditions, 2004 events. 1316/2004 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 10916 event pairs, 850 based on Foata normal form. 1/694 useless extension candidates. Maximal degree in co-relation 4051. Up to 992 conditions per place. [2022-12-13 11:08:01,062 INFO L137 encePairwiseOnDemand]: 431/441 looper letters, 75 selfloop transitions, 21 changer transitions 0/97 dead transitions. [2022-12-13 11:08:01,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 97 transitions, 469 flow [2022-12-13 11:08:01,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:08:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:08:01,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1111 transitions. [2022-12-13 11:08:01,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41987906273620557 [2022-12-13 11:08:01,068 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1111 transitions. [2022-12-13 11:08:01,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1111 transitions. [2022-12-13 11:08:01,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:01,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1111 transitions. [2022-12-13 11:08:01,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:01,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 441.0) internal successors, (3087), 7 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:01,078 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 441.0) internal successors, (3087), 7 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:01,078 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 127 flow. Second operand 6 states and 1111 transitions. [2022-12-13 11:08:01,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 97 transitions, 469 flow [2022-12-13 11:08:01,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 97 transitions, 455 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:08:01,081 INFO L231 Difference]: Finished difference. Result has 52 places, 62 transitions, 294 flow [2022-12-13 11:08:01,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=52, PETRI_TRANSITIONS=62} [2022-12-13 11:08:01,082 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2022-12-13 11:08:01,082 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 62 transitions, 294 flow [2022-12-13 11:08:01,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:01,083 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:01,083 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:08:01,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:01,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:01,285 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:08:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:01,285 INFO L85 PathProgramCache]: Analyzing trace with hash 870950, now seen corresponding path program 1 times [2022-12-13 11:08:01,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:08:01,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772319782] [2022-12-13 11:08:01,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:01,286 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 11:08:01,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:08:01,287 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:01,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:01,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 11:08:01,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:01,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 11:08:01,417 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 11:08:01,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:08:01,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:08:01,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772319782] [2022-12-13 11:08:01,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772319782] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:01,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:01,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:08:01,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830221885] [2022-12-13 11:08:01,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:01,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:08:01,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:08:01,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:08:01,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:08:01,596 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 441 [2022-12-13 11:08:01,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 62 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 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 11:08:01,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:01,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 441 [2022-12-13 11:08:01,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:02,022 INFO L130 PetriNetUnfolder]: 1314/2000 cut-off events. [2022-12-13 11:08:02,022 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-13 11:08:02,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4104 conditions, 2000 events. 1314/2000 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 10946 event pairs, 850 based on Foata normal form. 4/677 useless extension candidates. Maximal degree in co-relation 4091. Up to 1979 conditions per place. [2022-12-13 11:08:02,028 INFO L137 encePairwiseOnDemand]: 439/441 looper letters, 53 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2022-12-13 11:08:02,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 390 flow [2022-12-13 11:08:02,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:08:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:08:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2022-12-13 11:08:02,030 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4346182917611489 [2022-12-13 11:08:02,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2022-12-13 11:08:02,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2022-12-13 11:08:02,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:02,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2022-12-13 11:08:02,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:02,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:02,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:02,033 INFO L175 Difference]: Start difference. First operand has 52 places, 62 transitions, 294 flow. Second operand 3 states and 575 transitions. [2022-12-13 11:08:02,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 390 flow [2022-12-13 11:08:02,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 373 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:02,035 INFO L231 Difference]: Finished difference. Result has 52 places, 59 transitions, 267 flow [2022-12-13 11:08:02,036 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=52, PETRI_TRANSITIONS=59} [2022-12-13 11:08:02,036 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2022-12-13 11:08:02,036 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 59 transitions, 267 flow [2022-12-13 11:08:02,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 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 11:08:02,036 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:02,037 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 11:08:02,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:02,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:02,238 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:08:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:02,238 INFO L85 PathProgramCache]: Analyzing trace with hash 26999085, now seen corresponding path program 1 times [2022-12-13 11:08:02,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:08:02,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404790873] [2022-12-13 11:08:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:02,239 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 11:08:02,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:08:02,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:02,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:02,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:08:02,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:02,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:08:02,412 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-13 11:08:02,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-12-13 11:08:02,463 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 11:08:02,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 11:08:02,488 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 11:08:02,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:08:02,489 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:08:02,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404790873] [2022-12-13 11:08:02,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404790873] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:02,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:02,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:08:02,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300071851] [2022-12-13 11:08:02,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:02,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:08:02,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:08:02,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:08:02,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:08:02,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 441 [2022-12-13 11:08:02,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 59 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:02,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:02,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 441 [2022-12-13 11:08:02,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:03,022 INFO L130 PetriNetUnfolder]: 984/1536 cut-off events. [2022-12-13 11:08:03,023 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 11:08:03,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3161 conditions, 1536 events. 984/1536 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 8202 event pairs, 634 based on Foata normal form. 0/574 useless extension candidates. Maximal degree in co-relation 3148. Up to 1522 conditions per place. [2022-12-13 11:08:03,028 INFO L137 encePairwiseOnDemand]: 438/441 looper letters, 53 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2022-12-13 11:08:03,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 351 flow [2022-12-13 11:08:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:08:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:08:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2022-12-13 11:08:03,031 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4406651549508692 [2022-12-13 11:08:03,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2022-12-13 11:08:03,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2022-12-13 11:08:03,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:03,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2022-12-13 11:08:03,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:03,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:03,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:03,037 INFO L175 Difference]: Start difference. First operand has 52 places, 59 transitions, 267 flow. Second operand 3 states and 583 transitions. [2022-12-13 11:08:03,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 351 flow [2022-12-13 11:08:03,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:03,040 INFO L231 Difference]: Finished difference. Result has 51 places, 55 transitions, 240 flow [2022-12-13 11:08:03,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=51, PETRI_TRANSITIONS=55} [2022-12-13 11:08:03,041 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2022-12-13 11:08:03,041 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 55 transitions, 240 flow [2022-12-13 11:08:03,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:03,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:03,042 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 11:08:03,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:03,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:03,242 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:08:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:03,243 INFO L85 PathProgramCache]: Analyzing trace with hash 26999086, now seen corresponding path program 1 times [2022-12-13 11:08:03,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:08:03,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144443457] [2022-12-13 11:08:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:03,243 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 11:08:03,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:08:03,244 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:03,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:03,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:08:03,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:03,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:08:03,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:08:03,380 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 11:08:03,381 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 11:08:03,391 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 11:08:03,452 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 11:08:03,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 11:08:03,590 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 11:08:03,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:03,973 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 11:08:03,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:08:03,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144443457] [2022-12-13 11:08:03,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144443457] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:03,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:08:03,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 11:08:03,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769771811] [2022-12-13 11:08:03,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:03,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:08:03,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:08:03,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:08:03,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:08:05,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 441 [2022-12-13 11:08:05,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 55 transitions, 240 flow. Second operand has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:05,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:05,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 441 [2022-12-13 11:08:05,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:06,550 INFO L130 PetriNetUnfolder]: 654/1072 cut-off events. [2022-12-13 11:08:06,550 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-13 11:08:06,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2223 conditions, 1072 events. 654/1072 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 5503 event pairs, 418 based on Foata normal form. 0/483 useless extension candidates. Maximal degree in co-relation 2209. Up to 526 conditions per place. [2022-12-13 11:08:06,554 INFO L137 encePairwiseOnDemand]: 434/441 looper letters, 69 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2022-12-13 11:08:06,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 81 transitions, 446 flow [2022-12-13 11:08:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:08:06,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:08:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1404 transitions. [2022-12-13 11:08:06,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2022-12-13 11:08:06,557 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1404 transitions. [2022-12-13 11:08:06,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1404 transitions. [2022-12-13 11:08:06,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:06,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1404 transitions. [2022-12-13 11:08:06,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 175.5) internal successors, (1404), 8 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:06,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 441.0) internal successors, (3969), 9 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:06,562 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 441.0) internal successors, (3969), 9 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:06,562 INFO L175 Difference]: Start difference. First operand has 51 places, 55 transitions, 240 flow. Second operand 8 states and 1404 transitions. [2022-12-13 11:08:06,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 81 transitions, 446 flow [2022-12-13 11:08:06,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:06,564 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 250 flow [2022-12-13 11:08:06,564 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2022-12-13 11:08:06,565 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2022-12-13 11:08:06,565 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 250 flow [2022-12-13 11:08:06,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:06,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:06,565 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 11:08:06,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:06,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:06,767 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:08:06,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:06,768 INFO L85 PathProgramCache]: Analyzing trace with hash 151029336, now seen corresponding path program 2 times [2022-12-13 11:08:06,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:08:06,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501509024] [2022-12-13 11:08:06,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:08:06,770 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 11:08:06,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:08:06,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:06,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:06,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:08:06,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:08:06,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 11:08:06,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:06,969 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:08:06,969 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 11:08:07,083 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 11:08:07,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:07,627 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 11:08:07,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:08:07,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501509024] [2022-12-13 11:08:07,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501509024] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:07,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:08:07,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:08:07,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728013745] [2022-12-13 11:08:07,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:07,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:08:07,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:08:07,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:08:07,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:08:11,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 441 [2022-12-13 11:08:11,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 250 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:11,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:11,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 441 [2022-12-13 11:08:11,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:15,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:08:16,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:08:17,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:08:18,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:08:20,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:08:22,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:08:26,284 INFO L130 PetriNetUnfolder]: 2596/4242 cut-off events. [2022-12-13 11:08:26,284 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-12-13 11:08:26,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8664 conditions, 4242 events. 2596/4242 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26486 event pairs, 1672 based on Foata normal form. 10/1930 useless extension candidates. Maximal degree in co-relation 8648. Up to 521 conditions per place. [2022-12-13 11:08:26,296 INFO L137 encePairwiseOnDemand]: 434/441 looper letters, 243 selfloop transitions, 31 changer transitions 0/275 dead transitions. [2022-12-13 11:08:26,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 275 transitions, 1378 flow [2022-12-13 11:08:26,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:08:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 11:08:26,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2494 transitions. [2022-12-13 11:08:26,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43502529216814934 [2022-12-13 11:08:26,301 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2494 transitions. [2022-12-13 11:08:26,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2494 transitions. [2022-12-13 11:08:26,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:26,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2494 transitions. [2022-12-13 11:08:26,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 191.84615384615384) internal successors, (2494), 13 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:26,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 441.0) internal successors, (6174), 14 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:26,310 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 441.0) internal successors, (6174), 14 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:26,310 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 250 flow. Second operand 13 states and 2494 transitions. [2022-12-13 11:08:26,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 275 transitions, 1378 flow [2022-12-13 11:08:26,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 275 transitions, 1341 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-12-13 11:08:26,313 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 467 flow [2022-12-13 11:08:26,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=467, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2022-12-13 11:08:26,314 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2022-12-13 11:08:26,314 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 467 flow [2022-12-13 11:08:26,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:26,315 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:26,315 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:08:26,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:26,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:26,516 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:08:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:26,518 INFO L85 PathProgramCache]: Analyzing trace with hash 176335856, now seen corresponding path program 1 times [2022-12-13 11:08:26,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:08:26,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134484396] [2022-12-13 11:08:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:26,519 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 11:08:26,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:08:26,522 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:26,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:26,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:08:26,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:26,654 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 11:08:26,654 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-12-13 11:08:26,678 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 11:08:26,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 11:08:26,688 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 11:08:26,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:08:26,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:08:26,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134484396] [2022-12-13 11:08:26,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134484396] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:26,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:26,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:08:26,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4031317] [2022-12-13 11:08:26,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:26,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:08:26,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:08:26,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:08:26,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:08:26,761 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 441 [2022-12-13 11:08:26,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 467 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 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 11:08:26,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:26,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 441 [2022-12-13 11:08:26,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:27,280 INFO L130 PetriNetUnfolder]: 2428/3938 cut-off events. [2022-12-13 11:08:27,280 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-12-13 11:08:27,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8110 conditions, 3938 events. 2428/3938 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24676 event pairs, 1552 based on Foata normal form. 0/1794 useless extension candidates. Maximal degree in co-relation 8086. Up to 3882 conditions per place. [2022-12-13 11:08:27,291 INFO L137 encePairwiseOnDemand]: 438/441 looper letters, 66 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2022-12-13 11:08:27,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 597 flow [2022-12-13 11:08:27,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:08:27,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:08:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2022-12-13 11:08:27,293 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4331065759637188 [2022-12-13 11:08:27,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2022-12-13 11:08:27,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2022-12-13 11:08:27,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:27,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2022-12-13 11:08:27,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:27,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:27,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:27,296 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 467 flow. Second operand 3 states and 573 transitions. [2022-12-13 11:08:27,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 597 flow [2022-12-13 11:08:27,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 68 transitions, 543 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-12-13 11:08:27,298 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 411 flow [2022-12-13 11:08:27,298 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=411, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2022-12-13 11:08:27,299 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2022-12-13 11:08:27,299 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 411 flow [2022-12-13 11:08:27,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 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 11:08:27,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:27,299 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:08:27,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:27,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:27,500 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:08:27,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:27,501 INFO L85 PathProgramCache]: Analyzing trace with hash 176335858, now seen corresponding path program 1 times [2022-12-13 11:08:27,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:08:27,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857159058] [2022-12-13 11:08:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:27,502 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 11:08:27,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:08:27,504 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:27,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:27,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:08:27,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:27,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:08:27,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:08:27,685 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 11:08:27,686 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 11:08:27,691 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 11:08:27,723 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 11:08:27,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 11:08:27,845 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 11:08:27,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:28,246 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 11:08:28,246 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:08:28,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857159058] [2022-12-13 11:08:28,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857159058] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:28,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:08:28,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2022-12-13 11:08:28,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133391009] [2022-12-13 11:08:28,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:28,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 11:08:28,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:08:28,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 11:08:28,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-12-13 11:08:29,718 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 441 [2022-12-13 11:08:29,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 411 flow. Second operand has 9 states, 9 states have (on average 167.33333333333334) internal successors, (1506), 9 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:29,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:29,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 441 [2022-12-13 11:08:29,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:31,358 INFO L130 PetriNetUnfolder]: 2260/3634 cut-off events. [2022-12-13 11:08:31,358 INFO L131 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2022-12-13 11:08:31,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7470 conditions, 3634 events. 2260/3634 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 22078 event pairs, 1432 based on Foata normal form. 0/1808 useless extension candidates. Maximal degree in co-relation 7445. Up to 3110 conditions per place. [2022-12-13 11:08:31,373 INFO L137 encePairwiseOnDemand]: 434/441 looper letters, 73 selfloop transitions, 17 changer transitions 0/91 dead transitions. [2022-12-13 11:08:31,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 641 flow [2022-12-13 11:08:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:08:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:08:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1396 transitions. [2022-12-13 11:08:31,379 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3956916099773243 [2022-12-13 11:08:31,379 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1396 transitions. [2022-12-13 11:08:31,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1396 transitions. [2022-12-13 11:08:31,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:31,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1396 transitions. [2022-12-13 11:08:31,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 174.5) internal successors, (1396), 8 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:31,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 441.0) internal successors, (3969), 9 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:31,397 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 441.0) internal successors, (3969), 9 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:31,398 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 411 flow. Second operand 8 states and 1396 transitions. [2022-12-13 11:08:31,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 641 flow [2022-12-13 11:08:31,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 91 transitions, 640 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:31,403 INFO L231 Difference]: Finished difference. Result has 73 places, 66 transitions, 440 flow [2022-12-13 11:08:31,403 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=440, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2022-12-13 11:08:31,404 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2022-12-13 11:08:31,404 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 440 flow [2022-12-13 11:08:31,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 167.33333333333334) internal successors, (1506), 9 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:31,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:31,405 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:08:31,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 11:08:31,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:31,606 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:08:31,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:31,607 INFO L85 PathProgramCache]: Analyzing trace with hash 176335867, now seen corresponding path program 1 times [2022-12-13 11:08:31,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:08:31,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970166264] [2022-12-13 11:08:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:31,609 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 11:08:31,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:08:31,612 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:31,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:31,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:08:31,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:31,729 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 11:08:31,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:08:31,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:08:31,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970166264] [2022-12-13 11:08:31,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970166264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:31,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:31,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:08:31,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890013668] [2022-12-13 11:08:31,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:31,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:08:31,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:08:31,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:08:31,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:08:31,788 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 441 [2022-12-13 11:08:31,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 440 flow. Second operand has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:31,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:31,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 441 [2022-12-13 11:08:31,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:32,442 INFO L130 PetriNetUnfolder]: 2524/4244 cut-off events. [2022-12-13 11:08:32,442 INFO L131 PetriNetUnfolder]: For 208/208 co-relation queries the response was YES. [2022-12-13 11:08:32,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8777 conditions, 4244 events. 2524/4244 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 27939 event pairs, 1648 based on Foata normal form. 0/2220 useless extension candidates. Maximal degree in co-relation 8751. Up to 3577 conditions per place. [2022-12-13 11:08:32,453 INFO L137 encePairwiseOnDemand]: 430/441 looper letters, 92 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2022-12-13 11:08:32,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 96 transitions, 804 flow [2022-12-13 11:08:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:08:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:08:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 771 transitions. [2022-12-13 11:08:32,454 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4370748299319728 [2022-12-13 11:08:32,455 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 771 transitions. [2022-12-13 11:08:32,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 771 transitions. [2022-12-13 11:08:32,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:32,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 771 transitions. [2022-12-13 11:08:32,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:32,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 441.0) internal successors, (2205), 5 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:32,457 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 441.0) internal successors, (2205), 5 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:32,457 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 440 flow. Second operand 4 states and 771 transitions. [2022-12-13 11:08:32,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 96 transitions, 804 flow [2022-12-13 11:08:32,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 96 transitions, 766 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 11:08:32,460 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 430 flow [2022-12-13 11:08:32,460 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=430, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2022-12-13 11:08:32,461 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2022-12-13 11:08:32,461 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 430 flow [2022-12-13 11:08:32,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:32,461 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:32,461 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:08:32,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:32,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:32,662 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:08:32,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:32,662 INFO L85 PathProgramCache]: Analyzing trace with hash 176335762, now seen corresponding path program 1 times [2022-12-13 11:08:32,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:08:32,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767599734] [2022-12-13 11:08:32,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:32,663 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 11:08:32,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:08:32,664 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:32,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:32,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 11:08:32,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:32,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 11:08:32,750 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 11:08:32,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:08:32,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:08:32,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767599734] [2022-12-13 11:08:32,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767599734] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:32,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:32,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:08:32,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795110891] [2022-12-13 11:08:32,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:32,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:08:32,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:08:32,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:08:32,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:08:32,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 441 [2022-12-13 11:08:32,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:32,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:32,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 441 [2022-12-13 11:08:32,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:33,401 INFO L130 PetriNetUnfolder]: 2108/3548 cut-off events. [2022-12-13 11:08:33,401 INFO L131 PetriNetUnfolder]: For 498/562 co-relation queries the response was YES. [2022-12-13 11:08:33,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8595 conditions, 3548 events. 2108/3548 cut-off events. For 498/562 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22560 event pairs, 1336 based on Foata normal form. 0/2332 useless extension candidates. Maximal degree in co-relation 8568. Up to 3424 conditions per place. [2022-12-13 11:08:33,411 INFO L137 encePairwiseOnDemand]: 437/441 looper letters, 56 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2022-12-13 11:08:33,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 64 transitions, 550 flow [2022-12-13 11:08:33,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:08:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:08:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 712 transitions. [2022-12-13 11:08:33,413 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4036281179138322 [2022-12-13 11:08:33,413 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 712 transitions. [2022-12-13 11:08:33,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 712 transitions. [2022-12-13 11:08:33,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:33,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 712 transitions. [2022-12-13 11:08:33,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:33,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 441.0) internal successors, (2205), 5 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:33,416 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 441.0) internal successors, (2205), 5 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:33,416 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 430 flow. Second operand 4 states and 712 transitions. [2022-12-13 11:08:33,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 64 transitions, 550 flow [2022-12-13 11:08:33,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 64 transitions, 545 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:08:33,421 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 433 flow [2022-12-13 11:08:33,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=433, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2022-12-13 11:08:33,421 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2022-12-13 11:08:33,421 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 433 flow [2022-12-13 11:08:33,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:33,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:33,422 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:08:33,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:33,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:33,623 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:08:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:33,623 INFO L85 PathProgramCache]: Analyzing trace with hash 176335763, now seen corresponding path program 1 times [2022-12-13 11:08:33,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:08:33,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460828384] [2022-12-13 11:08:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:33,623 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 11:08:33,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:08:33,624 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:33,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:33,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:08:33,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:33,736 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 11:08:33,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:08:33,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:08:33,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460828384] [2022-12-13 11:08:33,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460828384] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:33,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:33,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:08:33,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101517152] [2022-12-13 11:08:33,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:33,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:08:33,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:08:33,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:08:33,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:08:33,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 441 [2022-12-13 11:08:33,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 433 flow. Second operand has 5 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:33,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:33,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 441 [2022-12-13 11:08:33,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:34,860 INFO L130 PetriNetUnfolder]: 4028/6548 cut-off events. [2022-12-13 11:08:34,860 INFO L131 PetriNetUnfolder]: For 678/710 co-relation queries the response was YES. [2022-12-13 11:08:34,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15842 conditions, 6548 events. 4028/6548 cut-off events. For 678/710 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 44702 event pairs, 1088 based on Foata normal form. 0/4556 useless extension candidates. Maximal degree in co-relation 15815. Up to 3961 conditions per place. [2022-12-13 11:08:34,879 INFO L137 encePairwiseOnDemand]: 435/441 looper letters, 74 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2022-12-13 11:08:34,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 84 transitions, 654 flow [2022-12-13 11:08:34,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:08:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:08:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 756 transitions. [2022-12-13 11:08:34,881 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2022-12-13 11:08:34,881 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 756 transitions. [2022-12-13 11:08:34,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 756 transitions. [2022-12-13 11:08:34,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:34,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 756 transitions. [2022-12-13 11:08:34,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:34,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 441.0) internal successors, (2205), 5 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:34,884 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 441.0) internal successors, (2205), 5 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:34,884 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 433 flow. Second operand 4 states and 756 transitions. [2022-12-13 11:08:34,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 84 transitions, 654 flow [2022-12-13 11:08:34,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 646 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:08:34,887 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 463 flow [2022-12-13 11:08:34,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=463, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2022-12-13 11:08:34,888 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2022-12-13 11:08:34,888 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 463 flow [2022-12-13 11:08:34,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:34,888 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:34,889 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:34,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 11:08:35,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:35,089 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:08:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:35,090 INFO L85 PathProgramCache]: Analyzing trace with hash 412254753, now seen corresponding path program 1 times [2022-12-13 11:08:35,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:08:35,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509754996] [2022-12-13 11:08:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:35,090 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 11:08:35,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:08:35,091 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:35,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:35,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:08:35,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:35,294 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 11:08:35,294 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 11:08:35,321 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 11:08:35,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 11:08:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:08:35,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:08:35,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:08:35,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509754996] [2022-12-13 11:08:35,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509754996] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:35,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:35,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:08:35,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891176275] [2022-12-13 11:08:35,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:35,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:08:35,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:08:35,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:08:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:08:35,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 441 [2022-12-13 11:08:35,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 463 flow. Second operand has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:35,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:35,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 441 [2022-12-13 11:08:35,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:36,149 INFO L130 PetriNetUnfolder]: 3028/5068 cut-off events. [2022-12-13 11:08:36,149 INFO L131 PetriNetUnfolder]: For 1218/1250 co-relation queries the response was YES. [2022-12-13 11:08:36,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12891 conditions, 5068 events. 3028/5068 cut-off events. For 1218/1250 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34179 event pairs, 1976 based on Foata normal form. 0/4180 useless extension candidates. Maximal degree in co-relation 12863. Up to 4999 conditions per place. [2022-12-13 11:08:36,168 INFO L137 encePairwiseOnDemand]: 437/441 looper letters, 51 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2022-12-13 11:08:36,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 64 transitions, 581 flow [2022-12-13 11:08:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:08:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:08:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 734 transitions. [2022-12-13 11:08:36,171 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41609977324263037 [2022-12-13 11:08:36,171 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 734 transitions. [2022-12-13 11:08:36,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 734 transitions. [2022-12-13 11:08:36,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:36,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 734 transitions. [2022-12-13 11:08:36,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:36,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 441.0) internal successors, (2205), 5 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:36,174 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 441.0) internal successors, (2205), 5 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:36,174 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 463 flow. Second operand 4 states and 734 transitions. [2022-12-13 11:08:36,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 64 transitions, 581 flow [2022-12-13 11:08:36,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 64 transitions, 571 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:08:36,177 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 469 flow [2022-12-13 11:08:36,177 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=469, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2022-12-13 11:08:36,177 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2022-12-13 11:08:36,177 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 469 flow [2022-12-13 11:08:36,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:36,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:36,177 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:36,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:36,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:36,379 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:08:36,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:36,379 INFO L85 PathProgramCache]: Analyzing trace with hash 412254754, now seen corresponding path program 1 times [2022-12-13 11:08:36,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:08:36,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460038344] [2022-12-13 11:08:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:36,380 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 11:08:36,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:08:36,381 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:36,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:08:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:36,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 11:08:36,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:36,638 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:08:36,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 11:08:36,682 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 11:08:36,683 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 11:08:36,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:08:36,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 11:08:36,760 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:08:36,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 11:08:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:08:36,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:08:41,496 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:08:41,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460038344] [2022-12-13 11:08:41,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460038344] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:41,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:08:41,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 11:08:41,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529330499] [2022-12-13 11:08:41,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:41,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:08:41,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:08:41,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:08:41,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:08:47,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:08:55,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 441 [2022-12-13 11:08:55,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 469 flow. Second operand has 8 states, 8 states have (on average 161.75) internal successors, (1294), 8 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:55,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 441 [2022-12-13 11:08:55,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:03,216 WARN L233 SmtUtils]: Spent 7.40s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:09:09,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:09:23,164 INFO L130 PetriNetUnfolder]: 6596/10912 cut-off events. [2022-12-13 11:09:23,164 INFO L131 PetriNetUnfolder]: For 2802/2826 co-relation queries the response was YES. [2022-12-13 11:09:23,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26926 conditions, 10912 events. 6596/10912 cut-off events. For 2802/2826 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 79581 event pairs, 4216 based on Foata normal form. 304/10024 useless extension candidates. Maximal degree in co-relation 26898. Up to 4152 conditions per place. [2022-12-13 11:09:23,199 INFO L137 encePairwiseOnDemand]: 432/441 looper letters, 104 selfloop transitions, 34 changer transitions 0/139 dead transitions. [2022-12-13 11:09:23,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 139 transitions, 1188 flow [2022-12-13 11:09:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 11:09:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 11:09:23,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2488 transitions. [2022-12-13 11:09:23,204 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3761148904006047 [2022-12-13 11:09:23,204 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2488 transitions. [2022-12-13 11:09:23,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2488 transitions. [2022-12-13 11:09:23,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:23,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2488 transitions. [2022-12-13 11:09:23,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 165.86666666666667) internal successors, (2488), 15 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:23,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 441.0) internal successors, (7056), 16 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:23,212 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 441.0) internal successors, (7056), 16 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:23,212 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 469 flow. Second operand 15 states and 2488 transitions. [2022-12-13 11:09:23,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 139 transitions, 1188 flow [2022-12-13 11:09:23,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 139 transitions, 1175 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:09:23,217 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 749 flow [2022-12-13 11:09:23,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=749, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2022-12-13 11:09:23,218 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2022-12-13 11:09:23,218 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 749 flow [2022-12-13 11:09:23,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 161.75) internal successors, (1294), 8 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:23,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:23,218 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:23,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:23,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:23,419 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:09:23,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:23,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1954965560, now seen corresponding path program 1 times [2022-12-13 11:09:23,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:09:23,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744123195] [2022-12-13 11:09:23,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:23,422 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 11:09:23,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:09:23,425 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:23,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:23,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:09:23,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:23,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 11:09:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:23,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:24,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:09:24,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744123195] [2022-12-13 11:09:24,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744123195] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:24,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:09:24,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:09:24,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738127690] [2022-12-13 11:09:24,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:24,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:09:24,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:09:24,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:09:24,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:09:27,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 441 [2022-12-13 11:09:27,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 749 flow. Second operand has 10 states, 10 states have (on average 169.6) internal successors, (1696), 10 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:27,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:27,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 441 [2022-12-13 11:09:27,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:30,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:09:33,365 INFO L130 PetriNetUnfolder]: 13612/21776 cut-off events. [2022-12-13 11:09:33,366 INFO L131 PetriNetUnfolder]: For 9603/9603 co-relation queries the response was YES. [2022-12-13 11:09:33,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56790 conditions, 21776 events. 13612/21776 cut-off events. For 9603/9603 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 167429 event pairs, 1216 based on Foata normal form. 912/21344 useless extension candidates. Maximal degree in co-relation 56757. Up to 6184 conditions per place. [2022-12-13 11:09:33,460 INFO L137 encePairwiseOnDemand]: 432/441 looper letters, 98 selfloop transitions, 41 changer transitions 0/140 dead transitions. [2022-12-13 11:09:33,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 140 transitions, 1231 flow [2022-12-13 11:09:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:09:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:09:33,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1437 transitions. [2022-12-13 11:09:33,464 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.407312925170068 [2022-12-13 11:09:33,464 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1437 transitions. [2022-12-13 11:09:33,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1437 transitions. [2022-12-13 11:09:33,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:33,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1437 transitions. [2022-12-13 11:09:33,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.625) internal successors, (1437), 8 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:33,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 441.0) internal successors, (3969), 9 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:33,472 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 441.0) internal successors, (3969), 9 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:33,472 INFO L175 Difference]: Start difference. First operand has 88 places, 81 transitions, 749 flow. Second operand 8 states and 1437 transitions. [2022-12-13 11:09:33,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 140 transitions, 1231 flow [2022-12-13 11:09:33,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 140 transitions, 1212 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-13 11:09:33,501 INFO L231 Difference]: Finished difference. Result has 98 places, 88 transitions, 895 flow [2022-12-13 11:09:33,501 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=895, PETRI_PLACES=98, PETRI_TRANSITIONS=88} [2022-12-13 11:09:33,502 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 48 predicate places. [2022-12-13 11:09:33,502 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 88 transitions, 895 flow [2022-12-13 11:09:33,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 169.6) internal successors, (1696), 10 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:33,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:33,503 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:33,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:33,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:33,704 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:09:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:33,705 INFO L85 PathProgramCache]: Analyzing trace with hash -86375044, now seen corresponding path program 2 times [2022-12-13 11:09:33,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:09:33,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767912819] [2022-12-13 11:09:33,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:09:33,708 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 11:09:33,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:09:33,711 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:33,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:33,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 11:09:33,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:33,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:09:33,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:34,010 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:09:34,010 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 11:09:34,131 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 11:09:34,132 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 11:09:34,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:34,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 11:09:34,294 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:09:34,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 11:09:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 11:09:34,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:09:34,356 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:09:34,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767912819] [2022-12-13 11:09:34,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767912819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:09:34,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:09:34,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:09:34,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946904494] [2022-12-13 11:09:34,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:09:34,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:09:34,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:09:34,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:09:34,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:09:34,907 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 441 [2022-12-13 11:09:34,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 88 transitions, 895 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:34,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:34,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 441 [2022-12-13 11:09:34,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:37,739 INFO L130 PetriNetUnfolder]: 11732/19080 cut-off events. [2022-12-13 11:09:37,739 INFO L131 PetriNetUnfolder]: For 19588/19716 co-relation queries the response was YES. [2022-12-13 11:09:37,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55677 conditions, 19080 events. 11732/19080 cut-off events. For 19588/19716 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 147378 event pairs, 7640 based on Foata normal form. 1208/19784 useless extension candidates. Maximal degree in co-relation 55638. Up to 19003 conditions per place. [2022-12-13 11:09:37,855 INFO L137 encePairwiseOnDemand]: 437/441 looper letters, 72 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2022-12-13 11:09:37,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 85 transitions, 1033 flow [2022-12-13 11:09:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:09:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:09:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 716 transitions. [2022-12-13 11:09:37,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40589569160997735 [2022-12-13 11:09:37,858 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 716 transitions. [2022-12-13 11:09:37,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 716 transitions. [2022-12-13 11:09:37,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:37,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 716 transitions. [2022-12-13 11:09:37,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:37,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 441.0) internal successors, (2205), 5 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:37,861 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 441.0) internal successors, (2205), 5 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:37,861 INFO L175 Difference]: Start difference. First operand has 98 places, 88 transitions, 895 flow. Second operand 4 states and 716 transitions. [2022-12-13 11:09:37,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 85 transitions, 1033 flow [2022-12-13 11:09:37,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 85 transitions, 960 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 11:09:37,914 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 816 flow [2022-12-13 11:09:37,914 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=816, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2022-12-13 11:09:37,914 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 44 predicate places. [2022-12-13 11:09:37,914 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 816 flow [2022-12-13 11:09:37,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:37,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:37,914 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:37,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:38,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:38,116 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:09:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:38,117 INFO L85 PathProgramCache]: Analyzing trace with hash -2127539839, now seen corresponding path program 1 times [2022-12-13 11:09:38,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:09:38,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303525576] [2022-12-13 11:09:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:38,119 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 11:09:38,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:09:38,122 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:38,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:38,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 11:09:38,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:09:38,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:38,462 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 11 treesize of output 9 [2022-12-13 11:09:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:09:38,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:09:38,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303525576] [2022-12-13 11:09:38,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303525576] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:38,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:09:38,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:09:38,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636767173] [2022-12-13 11:09:38,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:38,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:09:38,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:09:38,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:09:38,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:09:40,516 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 441 [2022-12-13 11:09:40,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 816 flow. Second operand has 12 states, 12 states have (on average 172.66666666666666) internal successors, (2072), 12 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:40,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:40,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 441 [2022-12-13 11:09:40,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:44,301 INFO L130 PetriNetUnfolder]: 10980/18184 cut-off events. [2022-12-13 11:09:44,301 INFO L131 PetriNetUnfolder]: For 9944/10040 co-relation queries the response was YES. [2022-12-13 11:09:44,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52276 conditions, 18184 events. 10980/18184 cut-off events. For 9944/10040 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 141700 event pairs, 920 based on Foata normal form. 720/18456 useless extension candidates. Maximal degree in co-relation 52238. Up to 3385 conditions per place. [2022-12-13 11:09:44,378 INFO L137 encePairwiseOnDemand]: 435/441 looper letters, 117 selfloop transitions, 31 changer transitions 0/149 dead transitions. [2022-12-13 11:09:44,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 149 transitions, 1283 flow [2022-12-13 11:09:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 11:09:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 11:09:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1811 transitions. [2022-12-13 11:09:44,382 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4106575963718821 [2022-12-13 11:09:44,382 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1811 transitions. [2022-12-13 11:09:44,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1811 transitions. [2022-12-13 11:09:44,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:44,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1811 transitions. [2022-12-13 11:09:44,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 181.1) internal successors, (1811), 10 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:44,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 441.0) internal successors, (4851), 11 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:44,388 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 441.0) internal successors, (4851), 11 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:44,388 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 816 flow. Second operand 10 states and 1811 transitions. [2022-12-13 11:09:44,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 149 transitions, 1283 flow [2022-12-13 11:09:44,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 149 transitions, 1258 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-12-13 11:09:44,459 INFO L231 Difference]: Finished difference. Result has 100 places, 87 transitions, 861 flow [2022-12-13 11:09:44,459 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=861, PETRI_PLACES=100, PETRI_TRANSITIONS=87} [2022-12-13 11:09:44,459 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 50 predicate places. [2022-12-13 11:09:44,459 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 87 transitions, 861 flow [2022-12-13 11:09:44,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 172.66666666666666) internal successors, (2072), 12 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:44,459 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:44,459 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1] [2022-12-13 11:09:44,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 11:09:44,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:44,661 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:09:44,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:44,662 INFO L85 PathProgramCache]: Analyzing trace with hash 608885762, now seen corresponding path program 1 times [2022-12-13 11:09:44,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:09:44,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167916941] [2022-12-13 11:09:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:44,663 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 11:09:44,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:09:44,666 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:44,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:09:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:44,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:09:44,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:44,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 11:09:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:45,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:47,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:09:47,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167916941] [2022-12-13 11:09:47,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167916941] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:47,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:09:47,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-12-13 11:09:47,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361945702] [2022-12-13 11:09:47,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:47,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 11:09:47,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:09:47,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 11:09:47,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-12-13 11:10:03,750 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 441 [2022-12-13 11:10:03,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 87 transitions, 861 flow. Second operand has 20 states, 20 states have (on average 171.05) internal successors, (3421), 20 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:03,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:10:03,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 441 [2022-12-13 11:10:03,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:10:09,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:10:11,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:10:13,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:10:15,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:10:17,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:10:19,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:10:21,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:10:23,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:10:38,042 INFO L130 PetriNetUnfolder]: 21765/36178 cut-off events. [2022-12-13 11:10:38,042 INFO L131 PetriNetUnfolder]: For 26626/26635 co-relation queries the response was YES. [2022-12-13 11:10:38,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107656 conditions, 36178 events. 21765/36178 cut-off events. For 26626/26635 co-relation queries the response was YES. Maximal size of possible extension queue 1229. Compared 298663 event pairs, 14400 based on Foata normal form. 41/36178 useless extension candidates. Maximal degree in co-relation 107618. Up to 6721 conditions per place. [2022-12-13 11:10:38,301 INFO L137 encePairwiseOnDemand]: 434/441 looper letters, 519 selfloop transitions, 50 changer transitions 0/570 dead transitions. [2022-12-13 11:10:38,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 570 transitions, 5071 flow [2022-12-13 11:10:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 11:10:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 11:10:38,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3763 transitions. [2022-12-13 11:10:38,307 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42664399092970523 [2022-12-13 11:10:38,307 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3763 transitions. [2022-12-13 11:10:38,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3763 transitions. [2022-12-13 11:10:38,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:10:38,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3763 transitions. [2022-12-13 11:10:38,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 188.15) internal successors, (3763), 20 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:38,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 441.0) internal successors, (9261), 21 states have internal predecessors, (9261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:38,318 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 441.0) internal successors, (9261), 21 states have internal predecessors, (9261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:38,318 INFO L175 Difference]: Start difference. First operand has 100 places, 87 transitions, 861 flow. Second operand 20 states and 3763 transitions. [2022-12-13 11:10:38,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 570 transitions, 5071 flow [2022-12-13 11:10:38,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 570 transitions, 4625 flow, removed 16 selfloop flow, removed 6 redundant places. [2022-12-13 11:10:38,551 INFO L231 Difference]: Finished difference. Result has 124 places, 105 transitions, 1205 flow [2022-12-13 11:10:38,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1205, PETRI_PLACES=124, PETRI_TRANSITIONS=105} [2022-12-13 11:10:38,551 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 74 predicate places. [2022-12-13 11:10:38,551 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 105 transitions, 1205 flow [2022-12-13 11:10:38,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 171.05) internal successors, (3421), 20 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:38,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:10:38,552 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 1, 1] [2022-12-13 11:10:38,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 11:10:38,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:10:38,754 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:10:38,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:10:38,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1499883070, now seen corresponding path program 3 times [2022-12-13 11:10:38,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:10:38,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731663053] [2022-12-13 11:10:38,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:10:38,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:10:38,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:10:38,759 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:10:38,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 11:10:39,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 11:10:39,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:10:39,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 11:10:39,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:10:39,138 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 11:10:39,139 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 11:10:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:39,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:10:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:43,785 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:10:43,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731663053] [2022-12-13 11:10:43,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731663053] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:10:43,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:10:43,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-12-13 11:10:43,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475098052] [2022-12-13 11:10:43,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:10:43,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 11:10:43,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:10:43,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 11:10:43,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-12-13 11:11:14,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 441 [2022-12-13 11:11:14,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 105 transitions, 1205 flow. Second operand has 26 states, 26 states have (on average 171.0) internal successors, (4446), 26 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:11:14,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:11:14,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 441 [2022-12-13 11:11:14,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:11:27,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:11:29,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:11:31,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:11:33,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:11:35,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:11:37,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:11:39,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:11:41,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:11:43,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:11:45,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:11:47,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:11:53,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:12:11,038 INFO L130 PetriNetUnfolder]: 21778/36204 cut-off events. [2022-12-13 11:12:11,039 INFO L131 PetriNetUnfolder]: For 18354/18354 co-relation queries the response was YES. [2022-12-13 11:12:11,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102209 conditions, 36204 events. 21778/36204 cut-off events. For 18354/18354 co-relation queries the response was YES. Maximal size of possible extension queue 1220. Compared 297409 event pairs, 14400 based on Foata normal form. 13/35606 useless extension candidates. Maximal degree in co-relation 102160. Up to 6735 conditions per place. [2022-12-13 11:12:11,326 INFO L137 encePairwiseOnDemand]: 435/441 looper letters, 451 selfloop transitions, 86 changer transitions 0/538 dead transitions. [2022-12-13 11:12:11,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 538 transitions, 4913 flow [2022-12-13 11:12:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 11:12:11,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 11:12:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5111 transitions. [2022-12-13 11:12:11,336 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4139131843213476 [2022-12-13 11:12:11,336 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5111 transitions. [2022-12-13 11:12:11,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5111 transitions. [2022-12-13 11:12:11,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:12:11,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5111 transitions. [2022-12-13 11:12:11,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 182.53571428571428) internal successors, (5111), 28 states have internal predecessors, (5111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:11,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 441.0) internal successors, (12789), 29 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:11,355 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 441.0) internal successors, (12789), 29 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:11,355 INFO L175 Difference]: Start difference. First operand has 124 places, 105 transitions, 1205 flow. Second operand 28 states and 5111 transitions. [2022-12-13 11:12:11,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 538 transitions, 4913 flow [2022-12-13 11:12:11,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 538 transitions, 4831 flow, removed 7 selfloop flow, removed 8 redundant places. [2022-12-13 11:12:11,705 INFO L231 Difference]: Finished difference. Result has 159 places, 143 transitions, 1987 flow [2022-12-13 11:12:11,705 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1987, PETRI_PLACES=159, PETRI_TRANSITIONS=143} [2022-12-13 11:12:11,705 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 109 predicate places. [2022-12-13 11:12:11,705 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 143 transitions, 1987 flow [2022-12-13 11:12:11,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 171.0) internal successors, (4446), 26 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:11,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:12:11,706 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 11:12:11,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 11:12:11,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:12:11,908 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:12:11,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:12:11,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1192451751, now seen corresponding path program 2 times [2022-12-13 11:12:11,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:12:11,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173151641] [2022-12-13 11:12:11,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:12:11,910 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 11:12:11,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:12:11,913 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:12:11,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 11:12:12,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:12:12,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:12:12,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:12:12,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:12:12,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 11:12:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:12:12,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:12:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:12:14,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:12:14,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173151641] [2022-12-13 11:12:14,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173151641] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:12:14,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:12:14,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2022-12-13 11:12:14,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857220547] [2022-12-13 11:12:14,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:12:14,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:12:14,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:12:14,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:12:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:12:27,302 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 441 [2022-12-13 11:12:27,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 143 transitions, 1987 flow. Second operand has 18 states, 18 states have (on average 162.55555555555554) internal successors, (2926), 18 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:27,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:12:27,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 441 [2022-12-13 11:12:27,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:12:34,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:12:43,171 INFO L130 PetriNetUnfolder]: 21560/35730 cut-off events. [2022-12-13 11:12:43,171 INFO L131 PetriNetUnfolder]: For 14976/14988 co-relation queries the response was YES. [2022-12-13 11:12:43,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101146 conditions, 35730 events. 21560/35730 cut-off events. For 14976/14988 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 294468 event pairs, 1840 based on Foata normal form. 108/35206 useless extension candidates. Maximal degree in co-relation 101080. Up to 12749 conditions per place. [2022-12-13 11:12:43,449 INFO L137 encePairwiseOnDemand]: 430/441 looper letters, 181 selfloop transitions, 101 changer transitions 0/283 dead transitions. [2022-12-13 11:12:43,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 283 transitions, 2985 flow [2022-12-13 11:12:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 11:12:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 11:12:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3408 transitions. [2022-12-13 11:12:43,455 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38639455782312926 [2022-12-13 11:12:43,455 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3408 transitions. [2022-12-13 11:12:43,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3408 transitions. [2022-12-13 11:12:43,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:12:43,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3408 transitions. [2022-12-13 11:12:43,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 170.4) internal successors, (3408), 20 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:43,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 441.0) internal successors, (9261), 21 states have internal predecessors, (9261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:43,464 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 441.0) internal successors, (9261), 21 states have internal predecessors, (9261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:43,464 INFO L175 Difference]: Start difference. First operand has 159 places, 143 transitions, 1987 flow. Second operand 20 states and 3408 transitions. [2022-12-13 11:12:43,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 283 transitions, 2985 flow [2022-12-13 11:12:43,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 283 transitions, 2761 flow, removed 71 selfloop flow, removed 12 redundant places. [2022-12-13 11:12:43,862 INFO L231 Difference]: Finished difference. Result has 168 places, 157 transitions, 2076 flow [2022-12-13 11:12:43,862 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2076, PETRI_PLACES=168, PETRI_TRANSITIONS=157} [2022-12-13 11:12:43,862 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 118 predicate places. [2022-12-13 11:12:43,862 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 157 transitions, 2076 flow [2022-12-13 11:12:43,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 162.55555555555554) internal successors, (2926), 18 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:43,862 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:12:43,863 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:12:43,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 11:12:44,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:12:44,064 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:12:44,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:12:44,065 INFO L85 PathProgramCache]: Analyzing trace with hash -2052689427, now seen corresponding path program 1 times [2022-12-13 11:12:44,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:12:44,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773034485] [2022-12-13 11:12:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:12:44,067 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 11:12:44,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:12:44,069 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:12:44,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 11:12:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:12:44,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:12:44,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:12:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:12:44,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:12:44,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:12:44,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773034485] [2022-12-13 11:12:44,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773034485] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:12:44,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:12:44,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:12:44,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413308412] [2022-12-13 11:12:44,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:12:44,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:12:44,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:12:44,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:12:44,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:12:44,307 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 441 [2022-12-13 11:12:44,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 157 transitions, 2076 flow. Second operand has 4 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:44,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:12:44,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 441 [2022-12-13 11:12:44,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:12:51,582 INFO L130 PetriNetUnfolder]: 27868/47822 cut-off events. [2022-12-13 11:12:51,582 INFO L131 PetriNetUnfolder]: For 42961/42961 co-relation queries the response was YES. [2022-12-13 11:12:51,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149784 conditions, 47822 events. 27868/47822 cut-off events. For 42961/42961 co-relation queries the response was YES. Maximal size of possible extension queue 1346. Compared 405882 event pairs, 7232 based on Foata normal form. 2892/50714 useless extension candidates. Maximal degree in co-relation 149715. Up to 19481 conditions per place. [2022-12-13 11:12:52,026 INFO L137 encePairwiseOnDemand]: 434/441 looper letters, 145 selfloop transitions, 58 changer transitions 0/203 dead transitions. [2022-12-13 11:12:52,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 203 transitions, 2781 flow [2022-12-13 11:12:52,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:12:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:12:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 950 transitions. [2022-12-13 11:12:52,029 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4308390022675737 [2022-12-13 11:12:52,030 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 950 transitions. [2022-12-13 11:12:52,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 950 transitions. [2022-12-13 11:12:52,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:12:52,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 950 transitions. [2022-12-13 11:12:52,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:52,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 441.0) internal successors, (2646), 6 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:52,034 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 441.0) internal successors, (2646), 6 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:52,034 INFO L175 Difference]: Start difference. First operand has 168 places, 157 transitions, 2076 flow. Second operand 5 states and 950 transitions. [2022-12-13 11:12:52,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 203 transitions, 2781 flow [2022-12-13 11:12:53,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 203 transitions, 2538 flow, removed 23 selfloop flow, removed 11 redundant places. [2022-12-13 11:12:53,727 INFO L231 Difference]: Finished difference. Result has 164 places, 187 transitions, 2296 flow [2022-12-13 11:12:53,727 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=1847, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2296, PETRI_PLACES=164, PETRI_TRANSITIONS=187} [2022-12-13 11:12:53,727 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 114 predicate places. [2022-12-13 11:12:53,728 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 187 transitions, 2296 flow [2022-12-13 11:12:53,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:53,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:12:53,728 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:12:53,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-13 11:12:53,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:12:53,930 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:12:53,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:12:53,931 INFO L85 PathProgramCache]: Analyzing trace with hash -487604509, now seen corresponding path program 2 times [2022-12-13 11:12:53,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:12:53,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801996622] [2022-12-13 11:12:53,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:12:53,933 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 11:12:53,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:12:53,936 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:12:53,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 11:12:54,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 11:12:54,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:12:54,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:12:54,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:12:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:12:54,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:12:54,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:12:54,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801996622] [2022-12-13 11:12:54,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801996622] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:12:54,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:12:54,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:12:54,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244651344] [2022-12-13 11:12:54,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:12:54,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:12:54,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:12:54,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:12:54,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:12:54,117 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 441 [2022-12-13 11:12:54,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 187 transitions, 2296 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:12:54,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:12:54,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 441 [2022-12-13 11:12:54,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:13:05,545 INFO L130 PetriNetUnfolder]: 40806/69408 cut-off events. [2022-12-13 11:13:05,546 INFO L131 PetriNetUnfolder]: For 151053/152400 co-relation queries the response was YES. [2022-12-13 11:13:06,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270518 conditions, 69408 events. 40806/69408 cut-off events. For 151053/152400 co-relation queries the response was YES. Maximal size of possible extension queue 1998. Compared 613855 event pairs, 18137 based on Foata normal form. 625/69565 useless extension candidates. Maximal degree in co-relation 270451. Up to 34925 conditions per place. [2022-12-13 11:13:06,267 INFO L137 encePairwiseOnDemand]: 438/441 looper letters, 248 selfloop transitions, 4 changer transitions 1/255 dead transitions. [2022-12-13 11:13:06,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 255 transitions, 3512 flow [2022-12-13 11:13:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:13:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:13:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2022-12-13 11:13:06,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2022-12-13 11:13:06,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2022-12-13 11:13:06,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2022-12-13 11:13:06,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:13:06,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2022-12-13 11:13:06,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:13:06,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:13:06,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:13:06,272 INFO L175 Difference]: Start difference. First operand has 164 places, 187 transitions, 2296 flow. Second operand 3 states and 595 transitions. [2022-12-13 11:13:06,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 255 transitions, 3512 flow [2022-12-13 11:13:09,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 255 transitions, 3508 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-12-13 11:13:09,211 INFO L231 Difference]: Finished difference. Result has 167 places, 190 transitions, 2331 flow [2022-12-13 11:13:09,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=2294, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2331, PETRI_PLACES=167, PETRI_TRANSITIONS=190} [2022-12-13 11:13:09,211 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 117 predicate places. [2022-12-13 11:13:09,211 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 190 transitions, 2331 flow [2022-12-13 11:13:09,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:13:09,211 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:13:09,211 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 11:13:09,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-13 11:13:09,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:13:09,413 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:13:09,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:13:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash -919373022, now seen corresponding path program 3 times [2022-12-13 11:13:09,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:13:09,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722540744] [2022-12-13 11:13:09,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:13:09,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:13:09,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:13:09,418 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:13:09,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 11:13:09,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:13:09,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:13:09,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 11:13:09,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:13:09,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 11:13:09,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:13:09,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-12-13 11:13:09,884 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 51 treesize of output 19 [2022-12-13 11:13:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 11:13:09,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:13:09,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:13:09,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722540744] [2022-12-13 11:13:09,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722540744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:13:09,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:13:09,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:13:09,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990825449] [2022-12-13 11:13:09,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:13:09,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:13:09,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:13:09,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:13:09,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:13:11,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 441 [2022-12-13 11:13:11,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 190 transitions, 2331 flow. Second operand has 6 states, 6 states have (on average 169.66666666666666) internal successors, (1018), 6 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:13:11,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:13:11,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 441 [2022-12-13 11:13:11,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:13:23,235 INFO L130 PetriNetUnfolder]: 41120/70137 cut-off events. [2022-12-13 11:13:23,235 INFO L131 PetriNetUnfolder]: For 147322/147898 co-relation queries the response was YES. [2022-12-13 11:13:23,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285483 conditions, 70137 events. 41120/70137 cut-off events. For 147322/147898 co-relation queries the response was YES. Maximal size of possible extension queue 2023. Compared 619277 event pairs, 4070 based on Foata normal form. 1206/71043 useless extension candidates. Maximal degree in co-relation 285413. Up to 59429 conditions per place. [2022-12-13 11:13:23,928 INFO L137 encePairwiseOnDemand]: 434/441 looper letters, 155 selfloop transitions, 57 changer transitions 0/214 dead transitions. [2022-12-13 11:13:23,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 214 transitions, 2890 flow [2022-12-13 11:13:23,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:13:23,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:13:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1056 transitions. [2022-12-13 11:13:23,931 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39909297052154197 [2022-12-13 11:13:23,931 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1056 transitions. [2022-12-13 11:13:23,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1056 transitions. [2022-12-13 11:13:23,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:13:23,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1056 transitions. [2022-12-13 11:13:23,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.0) internal successors, (1056), 6 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:13:23,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 441.0) internal successors, (3087), 7 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:13:23,934 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 441.0) internal successors, (3087), 7 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:13:23,935 INFO L175 Difference]: Start difference. First operand has 167 places, 190 transitions, 2331 flow. Second operand 6 states and 1056 transitions. [2022-12-13 11:13:23,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 214 transitions, 2890 flow [2022-12-13 11:13:26,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 214 transitions, 2883 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:13:26,952 INFO L231 Difference]: Finished difference. Result has 174 places, 198 transitions, 2548 flow [2022-12-13 11:13:26,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2548, PETRI_PLACES=174, PETRI_TRANSITIONS=198} [2022-12-13 11:13:26,952 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 124 predicate places. [2022-12-13 11:13:26,953 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 198 transitions, 2548 flow [2022-12-13 11:13:26,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.66666666666666) internal successors, (1018), 6 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:13:26,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:13:26,953 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 11:13:26,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-12-13 11:13:27,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:13:27,155 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:13:27,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:13:27,156 INFO L85 PathProgramCache]: Analyzing trace with hash -295768360, now seen corresponding path program 1 times [2022-12-13 11:13:27,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:13:27,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130205278] [2022-12-13 11:13:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:13:27,158 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 11:13:27,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:13:27,160 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:13:27,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 11:13:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:13:27,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:13:27,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:13:27,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 11:13:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:13:27,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:13:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:13:29,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:13:29,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130205278] [2022-12-13 11:13:29,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130205278] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:13:29,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:13:29,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 11:13:29,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111871623] [2022-12-13 11:13:29,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:13:29,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:13:29,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:13:29,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:13:29,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:13:40,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 441 [2022-12-13 11:13:40,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 198 transitions, 2548 flow. Second operand has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:13:40,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:13:40,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 441 [2022-12-13 11:13:40,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:13:50,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:52,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:13:58,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:14:00,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:14:01,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:14:02,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:14:04,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:14:06,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:14:11,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:14:13,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:14:15,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:14:18,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:14:22,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:14:43,264 INFO L130 PetriNetUnfolder]: 98046/165871 cut-off events. [2022-12-13 11:14:43,265 INFO L131 PetriNetUnfolder]: For 381718/383320 co-relation queries the response was YES. [2022-12-13 11:14:45,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 693202 conditions, 165871 events. 98046/165871 cut-off events. For 381718/383320 co-relation queries the response was YES. Maximal size of possible extension queue 3584. Compared 1560221 event pairs, 6171 based on Foata normal form. 9333/174949 useless extension candidates. Maximal degree in co-relation 693128. Up to 33128 conditions per place. [2022-12-13 11:14:45,704 INFO L137 encePairwiseOnDemand]: 433/441 looper letters, 328 selfloop transitions, 142 changer transitions 0/472 dead transitions. [2022-12-13 11:14:45,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 472 transitions, 5228 flow [2022-12-13 11:14:45,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 11:14:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 11:14:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3907 transitions. [2022-12-13 11:14:45,713 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4027004741290456 [2022-12-13 11:14:45,714 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3907 transitions. [2022-12-13 11:14:45,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3907 transitions. [2022-12-13 11:14:45,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:14:45,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3907 transitions. [2022-12-13 11:14:45,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 177.5909090909091) internal successors, (3907), 22 states have internal predecessors, (3907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:14:45,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 441.0) internal successors, (10143), 23 states have internal predecessors, (10143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:14:45,730 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 441.0) internal successors, (10143), 23 states have internal predecessors, (10143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:14:45,730 INFO L175 Difference]: Start difference. First operand has 174 places, 198 transitions, 2548 flow. Second operand 22 states and 3907 transitions. [2022-12-13 11:14:45,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 472 transitions, 5228 flow [2022-12-13 11:14:50,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 472 transitions, 5226 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 11:14:50,793 INFO L231 Difference]: Finished difference. Result has 203 places, 235 transitions, 3406 flow [2022-12-13 11:14:50,793 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3406, PETRI_PLACES=203, PETRI_TRANSITIONS=235} [2022-12-13 11:14:50,793 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 153 predicate places. [2022-12-13 11:14:50,793 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 235 transitions, 3406 flow [2022-12-13 11:14:50,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:14:50,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:14:50,794 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:14:50,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-13 11:14:50,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:14:50,996 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:14:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:14:50,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1690307284, now seen corresponding path program 1 times [2022-12-13 11:14:50,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:14:50,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538702466] [2022-12-13 11:14:50,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:14:50,998 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 11:14:50,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:14:51,001 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:14:51,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-13 11:14:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:14:51,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:14:51,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:14:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:14:51,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:14:51,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:14:51,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538702466] [2022-12-13 11:14:51,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538702466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:14:51,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:14:51,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:14:51,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939737729] [2022-12-13 11:14:51,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:14:51,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:14:51,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:14:51,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:14:51,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:14:51,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 441 [2022-12-13 11:14:51,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 235 transitions, 3406 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:14:51,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:14:51,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 441 [2022-12-13 11:14:51,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:15:25,457 INFO L130 PetriNetUnfolder]: 107871/188128 cut-off events. [2022-12-13 11:15:25,457 INFO L131 PetriNetUnfolder]: For 741872/743564 co-relation queries the response was YES. [2022-12-13 11:15:27,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 902351 conditions, 188128 events. 107871/188128 cut-off events. For 741872/743564 co-relation queries the response was YES. Maximal size of possible extension queue 4373. Compared 1882321 event pairs, 37464 based on Foata normal form. 8394/196402 useless extension candidates. Maximal degree in co-relation 902267. Up to 150475 conditions per place. [2022-12-13 11:15:28,012 INFO L137 encePairwiseOnDemand]: 438/441 looper letters, 288 selfloop transitions, 4 changer transitions 4/298 dead transitions. [2022-12-13 11:15:28,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 298 transitions, 4840 flow [2022-12-13 11:15:28,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:15:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:15:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2022-12-13 11:15:28,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4459561602418745 [2022-12-13 11:15:28,015 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2022-12-13 11:15:28,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2022-12-13 11:15:28,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:15:28,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2022-12-13 11:15:28,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:15:28,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:15:28,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:15:28,017 INFO L175 Difference]: Start difference. First operand has 203 places, 235 transitions, 3406 flow. Second operand 3 states and 590 transitions. [2022-12-13 11:15:28,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 298 transitions, 4840 flow [2022-12-13 11:15:46,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 298 transitions, 4599 flow, removed 16 selfloop flow, removed 5 redundant places. [2022-12-13 11:15:46,067 INFO L231 Difference]: Finished difference. Result has 201 places, 234 transitions, 3186 flow [2022-12-13 11:15:46,067 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=3189, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3186, PETRI_PLACES=201, PETRI_TRANSITIONS=234} [2022-12-13 11:15:46,067 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 151 predicate places. [2022-12-13 11:15:46,067 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 234 transitions, 3186 flow [2022-12-13 11:15:46,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:15:46,068 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:15:46,068 INFO L209 CegarLoopForPetriNet]: trace histogram [18, 1, 1, 1] [2022-12-13 11:15:46,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 11:15:46,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:15:46,269 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-13 11:15:46,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:15:46,270 INFO L85 PathProgramCache]: Analyzing trace with hash -649162974, now seen corresponding path program 2 times [2022-12-13 11:15:46,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:15:46,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057704237] [2022-12-13 11:15:46,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:15:46,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:15:46,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:15:46,274 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:15:46,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77a6aca-b577-41a7-8b0d-0dc6b9f34250/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-13 11:15:46,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:15:46,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:15:46,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 11:15:46,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:15:46,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 11:15:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:15:47,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:15:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:15:56,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:15:56,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057704237] [2022-12-13 11:15:56,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057704237] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:15:56,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:15:56,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2022-12-13 11:15:56,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022311146] [2022-12-13 11:15:56,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:15:56,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 11:15:56,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:15:56,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 11:15:56,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 11:17:19,968 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 441 [2022-12-13 11:17:19,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 234 transitions, 3186 flow. Second operand has 40 states, 40 states have (on average 171.025) internal successors, (6841), 40 states have internal predecessors, (6841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:17:19,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:17:19,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 441 [2022-12-13 11:17:19,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:17:43,318 WARN L233 SmtUtils]: Spent 9.17s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:17:46,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:17:48,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:17:50,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:17:52,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:17:54,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:17:56,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:17:58,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:18:00,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:18:02,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:18:04,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:18:06,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:18:08,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:18:10,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:18:12,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:18:14,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:18:16,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:18:18,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:18:20,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:18:31,347 WARN L233 SmtUtils]: Spent 8.94s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:18:40,926 WARN L233 SmtUtils]: Spent 6.82s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:18:59,070 WARN L233 SmtUtils]: Spent 7.55s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:19:07,788 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)