./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.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_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/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_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/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_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- 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 11:20:10,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:20:10,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:20:10,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:20:10,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:20:10,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:20:10,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:20:10,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:20:10,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:20:10,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:20:10,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:20:10,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:20:10,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:20:10,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:20:10,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:20:10,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:20:10,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:20:10,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:20:10,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:20:10,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:20:10,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:20:10,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:20:10,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:20:10,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:20:10,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:20:10,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:20:10,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:20:10,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:20:10,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:20:10,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:20:10,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:20:10,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:20:10,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:20:10,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:20:10,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:20:10,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:20:10,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:20:10,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:20:10,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:20:10,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:20:10,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:20:10,401 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 11:20:10,420 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:20:10,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:20:10,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:20:10,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:20:10,421 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:20:10,421 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:20:10,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:20:10,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:20:10,422 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:20:10,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:20:10,422 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:20:10,426 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:20:10,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:20:10,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:20:10,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:20:10,427 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:20:10,427 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:20:10,427 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:20:10,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:20:10,427 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:20:10,427 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:20:10,428 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:20:10,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:20:10,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:20:10,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:20:10,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:20:10,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:20:10,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:20:10,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:20:10,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:20:10,429 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:20:10,429 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:20:10,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:20:10,429 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:20:10,429 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_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-12-13 11:20:10,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:20:10,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:20:10,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:20:10,628 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:20:10,629 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:20:10,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-12-13 11:20:13,216 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:20:13,370 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:20:13,371 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-12-13 11:20:13,377 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/data/db5aed4ab/a9192df039d3404c94540071a1a1f82e/FLAGbc47db6fb [2022-12-13 11:20:13,388 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/data/db5aed4ab/a9192df039d3404c94540071a1a1f82e [2022-12-13 11:20:13,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:20:13,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:20:13,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:20:13,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:20:13,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:20:13,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:20:13" (1/1) ... [2022-12-13 11:20:13,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78283f8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:13, skipping insertion in model container [2022-12-13 11:20:13,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:20:13" (1/1) ... [2022-12-13 11:20:13,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:20:13,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:20:13,536 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_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-12-13 11:20:13,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:20:13,552 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 11:20:13,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6e2319a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:13, skipping insertion in model container [2022-12-13 11:20:13,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:20:13,553 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 11:20:13,555 INFO L158 Benchmark]: Toolchain (without parser) took 163.34ms. Allocated memory is still 151.0MB. Free memory was 113.8MB in the beginning and 104.2MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 11:20:13,555 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 151.0MB. Free memory is still 121.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 11:20:13,555 INFO L158 Benchmark]: CACSL2BoogieTranslator took 161.75ms. Allocated memory is still 151.0MB. Free memory was 113.8MB in the beginning and 104.2MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 11:20:13,556 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 151.0MB. Free memory is still 121.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 161.75ms. Allocated memory is still 151.0MB. Free memory was 113.8MB in the beginning and 104.2MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: 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_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/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_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/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_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- 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 11:20:15,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:20:15,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:20:15,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:20:15,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:20:15,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:20:15,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:20:15,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:20:15,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:20:15,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:20:15,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:20:15,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:20:15,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:20:15,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:20:15,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:20:15,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:20:15,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:20:15,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:20:15,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:20:15,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:20:15,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:20:15,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:20:15,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:20:15,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:20:15,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:20:15,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:20:15,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:20:15,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:20:15,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:20:15,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:20:15,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:20:15,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:20:15,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:20:15,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:20:15,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:20:15,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:20:15,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:20:15,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:20:15,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:20:15,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:20:15,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:20:15,048 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 11:20:15,075 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:20:15,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:20:15,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:20:15,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:20:15,077 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:20:15,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:20:15,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:20:15,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:20:15,078 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:20:15,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:20:15,078 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:20:15,079 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:20:15,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:20:15,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:20:15,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:20:15,079 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:20:15,080 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:20:15,080 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:20:15,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:20:15,080 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:20:15,080 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 11:20:15,080 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 11:20:15,081 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:20:15,081 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:20:15,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:20:15,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:20:15,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:20:15,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:20:15,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:20:15,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:20:15,082 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 11:20:15,082 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 11:20:15,083 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:20:15,083 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:20:15,083 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:20:15,083 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 11:20:15,083 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:20:15,083 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_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-12-13 11:20:15,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:20:15,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:20:15,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:20:15,313 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:20:15,313 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:20:15,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-12-13 11:20:17,953 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:20:18,118 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:20:18,118 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-12-13 11:20:18,124 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/data/4b1a399d1/c44e16f043944ff0b0a5d842dc2f8093/FLAG1e4341f22 [2022-12-13 11:20:18,134 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/data/4b1a399d1/c44e16f043944ff0b0a5d842dc2f8093 [2022-12-13 11:20:18,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:20:18,137 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:20:18,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:20:18,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:20:18,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:20:18,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:20:18" (1/1) ... [2022-12-13 11:20:18,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d22befd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:18, skipping insertion in model container [2022-12-13 11:20:18,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:20:18" (1/1) ... [2022-12-13 11:20:18,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:20:18,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:20:18,307 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_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-12-13 11:20:18,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:20:18,333 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 11:20:18,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:20:18,351 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_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-12-13 11:20:18,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:20:18,361 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:20:18,383 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_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-12-13 11:20:18,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:20:18,403 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:20:18,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:18 WrapperNode [2022-12-13 11:20:18,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:20:18,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:20:18,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:20:18,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:20:18,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:18" (1/1) ... [2022-12-13 11:20:18,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:18" (1/1) ... [2022-12-13 11:20:18,451 INFO L138 Inliner]: procedures = 28, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 262 [2022-12-13 11:20:18,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:20:18,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:20:18,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:20:18,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:20:18,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:18" (1/1) ... [2022-12-13 11:20:18,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:18" (1/1) ... [2022-12-13 11:20:18,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:18" (1/1) ... [2022-12-13 11:20:18,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:18" (1/1) ... [2022-12-13 11:20:18,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:18" (1/1) ... [2022-12-13 11:20:18,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:18" (1/1) ... [2022-12-13 11:20:18,484 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:18" (1/1) ... [2022-12-13 11:20:18,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:18" (1/1) ... [2022-12-13 11:20:18,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:20:18,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:20:18,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:20:18,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:20:18,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:18" (1/1) ... [2022-12-13 11:20:18,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:20:18,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:20:18,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:20:18,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:20:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:20:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 11:20:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:20:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 11:20:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 11:20:18,549 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 11:20:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 11:20:18,549 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 11:20:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 11:20:18,549 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 11:20:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 11:20:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:20:18,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:20:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:20:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 11:20:18,550 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 11:20:18,650 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:20:18,652 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:20:19,252 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:20:19,262 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:20:19,262 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 11:20:19,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:20:19 BoogieIcfgContainer [2022-12-13 11:20:19,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:20:19,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:20:19,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:20:19,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:20:19,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:20:18" (1/3) ... [2022-12-13 11:20:19,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@299d0c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:20:19, skipping insertion in model container [2022-12-13 11:20:19,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:20:18" (2/3) ... [2022-12-13 11:20:19,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@299d0c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:20:19, skipping insertion in model container [2022-12-13 11:20:19,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:20:19" (3/3) ... [2022-12-13 11:20:19,273 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2022-12-13 11:20:19,292 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:20:19,292 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-12-13 11:20:19,292 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:20:19,397 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 11:20:19,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 393 transitions, 810 flow [2022-12-13 11:20:19,585 INFO L130 PetriNetUnfolder]: 29/390 cut-off events. [2022-12-13 11:20:19,585 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:20:19,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 390 events. 29/390 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 656 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 250. Up to 2 conditions per place. [2022-12-13 11:20:19,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 374 places, 393 transitions, 810 flow [2022-12-13 11:20:19,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 366 places, 385 transitions, 788 flow [2022-12-13 11:20:19,613 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:20:19,623 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 366 places, 385 transitions, 788 flow [2022-12-13 11:20:19,626 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 366 places, 385 transitions, 788 flow [2022-12-13 11:20:19,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 366 places, 385 transitions, 788 flow [2022-12-13 11:20:19,677 INFO L130 PetriNetUnfolder]: 29/385 cut-off events. [2022-12-13 11:20:19,678 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:20:19,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 385 events. 29/385 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 657 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 250. Up to 2 conditions per place. [2022-12-13 11:20:19,685 INFO L119 LiptonReduction]: Number of co-enabled transitions 20950 [2022-12-13 11:21:07,922 INFO L134 LiptonReduction]: Checked pairs total: 21297 [2022-12-13 11:21:07,922 INFO L136 LiptonReduction]: Total number of compositions: 459 [2022-12-13 11:21:07,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:21:07,942 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;@1dfe0aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:21:07,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-12-13 11:21:07,943 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 11:21:07,944 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:21:07,944 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:21:07,944 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:21:07,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:21:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:21:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash 49740, now seen corresponding path program 1 times [2022-12-13 11:21:07,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:21:07,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579076152] [2022-12-13 11:21:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:21:07,956 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 11:21:07,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:21:07,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:07,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:21:08,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:21:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:21:08,155 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 11:21:08,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 11:21:08,180 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 11:21:08,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:21:08,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:21:08,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579076152] [2022-12-13 11:21:08,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579076152] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:21:08,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:21:08,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:21:08,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706836182] [2022-12-13 11:21:08,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:21:08,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:21:08,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:21:08,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:21:08,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:21:08,375 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 852 [2022-12-13 11:21:08,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:08,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:21:08,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 852 [2022-12-13 11:21:08,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:21:09,425 INFO L130 PetriNetUnfolder]: 4909/6156 cut-off events. [2022-12-13 11:21:09,426 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-12-13 11:21:09,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12403 conditions, 6156 events. 4909/6156 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 26391 event pairs, 2391 based on Foata normal form. 0/1475 useless extension candidates. Maximal degree in co-relation 10535. Up to 6125 conditions per place. [2022-12-13 11:21:09,451 INFO L137 encePairwiseOnDemand]: 845/852 looper letters, 49 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-12-13 11:21:09,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 53 transitions, 224 flow [2022-12-13 11:21:09,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:21:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:21:09,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1100 transitions. [2022-12-13 11:21:09,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4303599374021909 [2022-12-13 11:21:09,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1100 transitions. [2022-12-13 11:21:09,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1100 transitions. [2022-12-13 11:21:09,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:21:09,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1100 transitions. [2022-12-13 11:21:09,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 366.6666666666667) internal successors, (1100), 3 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:09,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:21:09,481 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:21:09,483 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 136 flow. Second operand 3 states and 1100 transitions. [2022-12-13 11:21:09,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 53 transitions, 224 flow [2022-12-13 11:21:09,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 212 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 11:21:09,498 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 114 flow [2022-12-13 11:21:09,500 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2022-12-13 11:21:09,502 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2022-12-13 11:21:09,502 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 114 flow [2022-12-13 11:21:09,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:09,503 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:21:09,503 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:21:09,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:09,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:09,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:21:09,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:21:09,707 INFO L85 PathProgramCache]: Analyzing trace with hash 49741, now seen corresponding path program 1 times [2022-12-13 11:21:09,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:21:09,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403662216] [2022-12-13 11:21:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:21:09,710 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 11:21:09,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:21:09,714 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:09,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:21:09,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:21:09,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:21:09,982 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:21:09,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:21:10,020 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 11:21:10,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:21:10,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:21:10,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403662216] [2022-12-13 11:21:10,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403662216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:21:10,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:21:10,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:21:10,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612802835] [2022-12-13 11:21:10,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:21:10,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:21:10,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:21:10,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:21:10,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:21:10,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 852 [2022-12-13 11:21:10,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:10,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:21:10,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 852 [2022-12-13 11:21:10,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:21:11,980 INFO L130 PetriNetUnfolder]: 9817/12308 cut-off events. [2022-12-13 11:21:11,980 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 11:21:11,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24620 conditions, 12308 events. 9817/12308 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 1184. Compared 57905 event pairs, 4782 based on Foata normal form. 0/2949 useless extension candidates. Maximal degree in co-relation 24614. Up to 6126 conditions per place. [2022-12-13 11:21:12,035 INFO L137 encePairwiseOnDemand]: 843/852 looper letters, 90 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2022-12-13 11:21:12,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 99 transitions, 404 flow [2022-12-13 11:21:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:21:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:21:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1143 transitions. [2022-12-13 11:21:12,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4471830985915493 [2022-12-13 11:21:12,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1143 transitions. [2022-12-13 11:21:12,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1143 transitions. [2022-12-13 11:21:12,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:21:12,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1143 transitions. [2022-12-13 11:21:12,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:12,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:21:12,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:21:12,044 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 114 flow. Second operand 3 states and 1143 transitions. [2022-12-13 11:21:12,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 99 transitions, 404 flow [2022-12-13 11:21:12,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 99 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:21:12,046 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 163 flow [2022-12-13 11:21:12,046 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2022-12-13 11:21:12,047 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -7 predicate places. [2022-12-13 11:21:12,047 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 163 flow [2022-12-13 11:21:12,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:12,047 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:21:12,047 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:21:12,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:12,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:12,248 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:21:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:21:12,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1547909, now seen corresponding path program 1 times [2022-12-13 11:21:12,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:21:12,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110077557] [2022-12-13 11:21:12,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:21:12,249 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 11:21:12,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:21:12,250 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:12,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:21:12,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:21:12,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:21:12,412 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:21:12,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:21:12,470 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 11:21:12,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:21:12,672 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 11:21:12,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:21:12,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110077557] [2022-12-13 11:21:12,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110077557] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:21:12,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:21:12,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 11:21:12,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161040161] [2022-12-13 11:21:12,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:21:12,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:21:12,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:21:12,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:21:12,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:21:14,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 852 [2022-12-13 11:21:14,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 163 flow. Second operand has 6 states, 6 states have (on average 334.0) internal successors, (2004), 6 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:14,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:21:14,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 852 [2022-12-13 11:21:14,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:21:15,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:21:17,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:21:19,469 INFO L130 PetriNetUnfolder]: 14735/18476 cut-off events. [2022-12-13 11:21:19,469 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 11:21:19,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36998 conditions, 18476 events. 14735/18476 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 90688 event pairs, 7173 based on Foata normal form. 0/4444 useless extension candidates. Maximal degree in co-relation 36989. Up to 6127 conditions per place. [2022-12-13 11:21:19,541 INFO L137 encePairwiseOnDemand]: 840/852 looper letters, 131 selfloop transitions, 27 changer transitions 0/161 dead transitions. [2022-12-13 11:21:19,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 161 transitions, 739 flow [2022-12-13 11:21:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:21:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:21:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2165 transitions. [2022-12-13 11:21:19,548 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4235133020344288 [2022-12-13 11:21:19,548 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2165 transitions. [2022-12-13 11:21:19,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2165 transitions. [2022-12-13 11:21:19,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:21:19,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2165 transitions. [2022-12-13 11:21:19,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 360.8333333333333) internal successors, (2165), 6 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:19,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 852.0) internal successors, (5964), 7 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:19,557 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 852.0) internal successors, (5964), 7 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:19,557 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 163 flow. Second operand 6 states and 2165 transitions. [2022-12-13 11:21:19,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 161 transitions, 739 flow [2022-12-13 11:21:19,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 161 transitions, 715 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:21:19,560 INFO L231 Difference]: Finished difference. Result has 63 places, 79 transitions, 355 flow [2022-12-13 11:21:19,560 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=63, PETRI_TRANSITIONS=79} [2022-12-13 11:21:19,560 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2022-12-13 11:21:19,560 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 79 transitions, 355 flow [2022-12-13 11:21:19,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 334.0) internal successors, (2004), 6 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:19,561 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:21:19,561 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 11:21:19,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:19,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:19,763 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:21:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:21:19,763 INFO L85 PathProgramCache]: Analyzing trace with hash 48100881, now seen corresponding path program 1 times [2022-12-13 11:21:19,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:21:19,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324355545] [2022-12-13 11:21:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:21:19,764 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 11:21:19,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:21:19,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:19,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:21:19,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:21:19,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:21:19,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:21:19,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:21:19,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:21:19,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:21:20,016 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-13 11:21:20,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-13 11:21:20,038 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 11:21:20,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 11:21:20,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:21:20,091 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 12 treesize of output 14 [2022-12-13 11:21:20,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:21:20,119 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 12 treesize of output 14 [2022-12-13 11:21:20,146 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 11:21:20,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:21:20,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:21:20,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324355545] [2022-12-13 11:21:20,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324355545] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:21:20,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:21:20,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:21:20,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918254724] [2022-12-13 11:21:20,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:21:20,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:21:20,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:21:20,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:21:20,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:21:20,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 852 [2022-12-13 11:21:20,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 79 transitions, 355 flow. Second operand has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:20,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:21:20,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 852 [2022-12-13 11:21:20,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:21:22,086 INFO L130 PetriNetUnfolder]: 11448/14511 cut-off events. [2022-12-13 11:21:22,087 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-12-13 11:21:22,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29130 conditions, 14511 events. 11448/14511 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 1220. Compared 71268 event pairs, 5568 based on Foata normal form. 0/3755 useless extension candidates. Maximal degree in co-relation 29117. Up to 14418 conditions per place. [2022-12-13 11:21:22,132 INFO L137 encePairwiseOnDemand]: 849/852 looper letters, 71 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2022-12-13 11:21:22,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 75 transitions, 479 flow [2022-12-13 11:21:22,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:21:22,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:21:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1115 transitions. [2022-12-13 11:21:22,135 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4362284820031299 [2022-12-13 11:21:22,135 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1115 transitions. [2022-12-13 11:21:22,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1115 transitions. [2022-12-13 11:21:22,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:21:22,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1115 transitions. [2022-12-13 11:21:22,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:22,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:21:22,140 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:21:22,140 INFO L175 Difference]: Start difference. First operand has 63 places, 79 transitions, 355 flow. Second operand 3 states and 1115 transitions. [2022-12-13 11:21:22,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 75 transitions, 479 flow [2022-12-13 11:21:22,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 75 transitions, 449 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 11:21:22,142 INFO L231 Difference]: Finished difference. Result has 62 places, 75 transitions, 307 flow [2022-12-13 11:21:22,142 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=307, PETRI_PLACES=62, PETRI_TRANSITIONS=75} [2022-12-13 11:21:22,143 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2022-12-13 11:21:22,143 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 75 transitions, 307 flow [2022-12-13 11:21:22,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:22,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:21:22,143 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 11:21:22,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:22,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:22,344 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:21:22,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:21:22,345 INFO L85 PathProgramCache]: Analyzing trace with hash 48100882, now seen corresponding path program 1 times [2022-12-13 11:21:22,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:21:22,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167902711] [2022-12-13 11:21:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:21:22,345 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 11:21:22,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:21:22,346 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:22,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:21:22,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:21:22,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:21:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:21:22,484 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-13 11:21:22,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-12-13 11:21:22,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:21:22,728 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 11:21:22,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 11:21:23,012 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-12-13 11:21:23,012 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 3 case distinctions, treesize of input 55 treesize of output 80 [2022-12-13 11:21:25,542 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 11:21:25,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:21:25,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:21:25,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167902711] [2022-12-13 11:21:25,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167902711] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:21:25,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:21:25,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:21:25,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131730696] [2022-12-13 11:21:25,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:21:25,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:21:25,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:21:25,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:21:25,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-12-13 11:21:27,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:21:29,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:21:31,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:21:34,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:21:36,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:21:38,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:21:40,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:21:42,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:21:44,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:21:46,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:21:48,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:21:50,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:21:51,095 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 852 [2022-12-13 11:21:51,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 75 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 312.8) internal successors, (1564), 5 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:51,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:21:51,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 852 [2022-12-13 11:21:51,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:21:52,448 INFO L130 PetriNetUnfolder]: 8161/10546 cut-off events. [2022-12-13 11:21:52,448 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-12-13 11:21:52,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21174 conditions, 10546 events. 8161/10546 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 52411 event pairs, 3963 based on Foata normal form. 0/3065 useless extension candidates. Maximal degree in co-relation 21160. Up to 10453 conditions per place. [2022-12-13 11:21:52,474 INFO L137 encePairwiseOnDemand]: 849/852 looper letters, 67 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2022-12-13 11:21:52,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 71 transitions, 423 flow [2022-12-13 11:21:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:21:52,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:21:52,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 984 transitions. [2022-12-13 11:21:52,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38497652582159625 [2022-12-13 11:21:52,479 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 984 transitions. [2022-12-13 11:21:52,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 984 transitions. [2022-12-13 11:21:52,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:21:52,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 984 transitions. [2022-12-13 11:21:52,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:52,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:21:52,487 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:21:52,487 INFO L175 Difference]: Start difference. First operand has 62 places, 75 transitions, 307 flow. Second operand 3 states and 984 transitions. [2022-12-13 11:21:52,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 71 transitions, 423 flow [2022-12-13 11:21:52,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 71 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:21:52,489 INFO L231 Difference]: Finished difference. Result has 61 places, 71 transitions, 288 flow [2022-12-13 11:21:52,490 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=61, PETRI_TRANSITIONS=71} [2022-12-13 11:21:52,490 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2022-12-13 11:21:52,490 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 71 transitions, 288 flow [2022-12-13 11:21:52,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.8) internal successors, (1564), 5 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:21:52,491 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:21:52,491 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 11:21:52,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-13 11:21:52,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:52,692 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:21:52,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:21:52,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1124986803, now seen corresponding path program 2 times [2022-12-13 11:21:52,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:21:52,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176515076] [2022-12-13 11:21:52,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:21:52,693 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 11:21:52,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:21:52,695 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:52,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:21:52,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:21:52,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:21:52,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 11:21:52,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:21:52,919 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:21:52,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:21:53,034 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 11:21:53,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:21:53,578 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 11:21:53,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:21:53,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176515076] [2022-12-13 11:21:53,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176515076] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:21:53,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:21:53,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:21:53,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013064318] [2022-12-13 11:21:53,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:21:53,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:21:53,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:21:53,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:21:53,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:22:00,344 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 852 [2022-12-13 11:22:00,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 71 transitions, 288 flow. Second operand has 12 states, 12 states have (on average 337.0) internal successors, (4044), 12 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:00,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:22:00,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 852 [2022-12-13 11:22:00,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:22:03,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:22:05,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:22:06,970 WARN L539 Checker$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 11:22:08,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:22:11,238 WARN L539 Checker$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 11:22:13,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:22:15,411 WARN L539 Checker$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 11:22:17,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:22:19,416 WARN L539 Checker$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 11:22:21,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:22:22,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:22:24,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:22:26,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:22:30,450 INFO L130 PetriNetUnfolder]: 19035/24591 cut-off events. [2022-12-13 11:22:30,451 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2022-12-13 11:22:30,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49325 conditions, 24591 events. 19035/24591 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 1240. Compared 131656 event pairs, 9247 based on Foata normal form. 13/7139 useless extension candidates. Maximal degree in co-relation 49310. Up to 3497 conditions per place. [2022-12-13 11:22:30,522 INFO L137 encePairwiseOnDemand]: 842/852 looper letters, 267 selfloop transitions, 48 changer transitions 0/318 dead transitions. [2022-12-13 11:22:30,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 318 transitions, 1576 flow [2022-12-13 11:22:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:22:30,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 11:22:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 5032 transitions. [2022-12-13 11:22:30,530 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42186452045606976 [2022-12-13 11:22:30,530 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 5032 transitions. [2022-12-13 11:22:30,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 5032 transitions. [2022-12-13 11:22:30,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:22:30,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 5032 transitions. [2022-12-13 11:22:30,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 359.42857142857144) internal successors, (5032), 14 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:30,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 852.0) internal successors, (12780), 15 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:30,547 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 852.0) internal successors, (12780), 15 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:30,547 INFO L175 Difference]: Start difference. First operand has 61 places, 71 transitions, 288 flow. Second operand 14 states and 5032 transitions. [2022-12-13 11:22:30,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 318 transitions, 1576 flow [2022-12-13 11:22:30,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 318 transitions, 1575 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:22:30,551 INFO L231 Difference]: Finished difference. Result has 81 places, 98 transitions, 624 flow [2022-12-13 11:22:30,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=624, PETRI_PLACES=81, PETRI_TRANSITIONS=98} [2022-12-13 11:22:30,552 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2022-12-13 11:22:30,552 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 98 transitions, 624 flow [2022-12-13 11:22:30,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 337.0) internal successors, (4044), 12 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:30,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:22:30,553 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:22:30,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:30,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:30,755 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:22:30,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:22:30,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1019659928, now seen corresponding path program 1 times [2022-12-13 11:22:30,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:22:30,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069065559] [2022-12-13 11:22:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:22:30,758 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 11:22:30,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:22:30,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:30,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:22:30,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:22:30,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:22:30,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:22:30,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:22:31,059 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-13 11:22:31,059 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-12-13 11:22:31,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-12-13 11:22:31,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:22:31,110 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 12 treesize of output 14 [2022-12-13 11:22:31,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:22:31,130 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 12 treesize of output 14 [2022-12-13 11:22:31,166 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 11:22:31,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:22:31,166 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:22:31,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069065559] [2022-12-13 11:22:31,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069065559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:22:31,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:22:31,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:22:31,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473673317] [2022-12-13 11:22:31,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:22:31,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:22:31,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:22:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:22:31,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:22:31,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 852 [2022-12-13 11:22:31,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 98 transitions, 624 flow. Second operand has 4 states, 4 states have (on average 356.5) internal successors, (1426), 4 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:31,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:22:31,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 852 [2022-12-13 11:22:31,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:22:33,901 INFO L130 PetriNetUnfolder]: 17922/23128 cut-off events. [2022-12-13 11:22:33,901 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2022-12-13 11:22:33,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46505 conditions, 23128 events. 17922/23128 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 122731 event pairs, 8694 based on Foata normal form. 0/6927 useless extension candidates. Maximal degree in co-relation 46481. Up to 22911 conditions per place. [2022-12-13 11:22:33,986 INFO L137 encePairwiseOnDemand]: 849/852 looper letters, 92 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2022-12-13 11:22:33,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 96 transitions, 806 flow [2022-12-13 11:22:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:22:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:22:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1111 transitions. [2022-12-13 11:22:33,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43466353677621283 [2022-12-13 11:22:33,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1111 transitions. [2022-12-13 11:22:33,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1111 transitions. [2022-12-13 11:22:33,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:22:33,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1111 transitions. [2022-12-13 11:22:33,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 370.3333333333333) internal successors, (1111), 3 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 11:22:33,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:22:33,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:22:33,994 INFO L175 Difference]: Start difference. First operand has 81 places, 98 transitions, 624 flow. Second operand 3 states and 1111 transitions. [2022-12-13 11:22:33,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 96 transitions, 806 flow [2022-12-13 11:22:33,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 705 flow, removed 25 selfloop flow, removed 4 redundant places. [2022-12-13 11:22:33,997 INFO L231 Difference]: Finished difference. Result has 77 places, 96 transitions, 521 flow [2022-12-13 11:22:33,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=521, PETRI_PLACES=77, PETRI_TRANSITIONS=96} [2022-12-13 11:22:33,997 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 14 predicate places. [2022-12-13 11:22:33,997 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 96 transitions, 521 flow [2022-12-13 11:22:33,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 356.5) internal successors, (1426), 4 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:33,998 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:22:33,998 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:22:34,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:34,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:34,199 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:22:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:22:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1019659930, now seen corresponding path program 1 times [2022-12-13 11:22:34,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:22:34,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858175039] [2022-12-13 11:22:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:22:34,202 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 11:22:34,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:22:34,205 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:34,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:22:34,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:22:34,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:22:34,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:22:34,396 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-13 11:22:34,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-12-13 11:22:34,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:22:34,603 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-12-13 11:22:34,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 11:22:34,772 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-13 11:22:34,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-12-13 11:22:34,946 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 11:22:34,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:22:34,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:22:34,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858175039] [2022-12-13 11:22:34,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858175039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:22:34,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:22:34,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:22:34,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672974845] [2022-12-13 11:22:34,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:22:34,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:22:34,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:22:34,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:22:34,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:22:35,570 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 852 [2022-12-13 11:22:35,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 96 transitions, 521 flow. Second operand has 4 states, 4 states have (on average 356.5) internal successors, (1426), 4 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:35,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:22:35,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 852 [2022-12-13 11:22:35,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:22:37,972 INFO L130 PetriNetUnfolder]: 16809/21665 cut-off events. [2022-12-13 11:22:37,973 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2022-12-13 11:22:37,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43522 conditions, 21665 events. 16809/21665 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 1178. Compared 114121 event pairs, 8141 based on Foata normal form. 0/6720 useless extension candidates. Maximal degree in co-relation 43497. Up to 21448 conditions per place. [2022-12-13 11:22:38,039 INFO L137 encePairwiseOnDemand]: 849/852 looper letters, 90 selfloop transitions, 1 changer transitions 0/94 dead transitions. [2022-12-13 11:22:38,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 699 flow [2022-12-13 11:22:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:22:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:22:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1109 transitions. [2022-12-13 11:22:38,043 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4338810641627543 [2022-12-13 11:22:38,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1109 transitions. [2022-12-13 11:22:38,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1109 transitions. [2022-12-13 11:22:38,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:22:38,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1109 transitions. [2022-12-13 11:22:38,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 369.6666666666667) internal successors, (1109), 3 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:38,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:22:38,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:22:38,047 INFO L175 Difference]: Start difference. First operand has 77 places, 96 transitions, 521 flow. Second operand 3 states and 1109 transitions. [2022-12-13 11:22:38,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 699 flow [2022-12-13 11:22:38,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 94 transitions, 698 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:22:38,049 INFO L231 Difference]: Finished difference. Result has 76 places, 94 transitions, 518 flow [2022-12-13 11:22:38,050 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=518, PETRI_PLACES=76, PETRI_TRANSITIONS=94} [2022-12-13 11:22:38,050 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 13 predicate places. [2022-12-13 11:22:38,050 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 94 transitions, 518 flow [2022-12-13 11:22:38,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 356.5) internal successors, (1426), 4 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:38,050 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:22:38,051 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:22:38,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 11:22:38,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:38,252 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:22:38,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:22:38,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1544701213, now seen corresponding path program 1 times [2022-12-13 11:22:38,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:22:38,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918362121] [2022-12-13 11:22:38,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:22:38,255 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 11:22:38,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:22:38,257 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:38,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:22:38,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:22:38,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:22:38,394 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 11:22:38,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:22:38,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:22:38,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918362121] [2022-12-13 11:22:38,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918362121] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:22:38,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:22:38,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:22:38,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502812723] [2022-12-13 11:22:38,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:22:38,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:22:38,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:22:38,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:22:38,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:22:38,559 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 852 [2022-12-13 11:22:38,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 94 transitions, 518 flow. Second operand has 5 states, 5 states have (on average 347.4) internal successors, (1737), 5 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:38,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:22:38,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 852 [2022-12-13 11:22:38,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:22:41,218 INFO L130 PetriNetUnfolder]: 13933/18567 cut-off events. [2022-12-13 11:22:41,219 INFO L131 PetriNetUnfolder]: For 167/167 co-relation queries the response was YES. [2022-12-13 11:22:41,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37349 conditions, 18567 events. 13933/18567 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 103616 event pairs, 7102 based on Foata normal form. 2/6527 useless extension candidates. Maximal degree in co-relation 37323. Up to 16492 conditions per place. [2022-12-13 11:22:41,284 INFO L137 encePairwiseOnDemand]: 841/852 looper letters, 116 selfloop transitions, 28 changer transitions 0/146 dead transitions. [2022-12-13 11:22:41,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 146 transitions, 928 flow [2022-12-13 11:22:41,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:22:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:22:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1835 transitions. [2022-12-13 11:22:41,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4307511737089202 [2022-12-13 11:22:41,287 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1835 transitions. [2022-12-13 11:22:41,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1835 transitions. [2022-12-13 11:22:41,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:22:41,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1835 transitions. [2022-12-13 11:22:41,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:41,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 852.0) internal successors, (5112), 6 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:41,292 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 852.0) internal successors, (5112), 6 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:41,292 INFO L175 Difference]: Start difference. First operand has 76 places, 94 transitions, 518 flow. Second operand 5 states and 1835 transitions. [2022-12-13 11:22:41,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 146 transitions, 928 flow [2022-12-13 11:22:41,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 146 transitions, 927 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:22:41,295 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 629 flow [2022-12-13 11:22:41,296 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=629, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2022-12-13 11:22:41,296 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2022-12-13 11:22:41,296 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 629 flow [2022-12-13 11:22:41,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 347.4) internal successors, (1737), 5 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:41,296 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:22:41,296 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:22:41,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 11:22:41,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:41,498 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:22:41,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:22:41,499 INFO L85 PathProgramCache]: Analyzing trace with hash -640613689, now seen corresponding path program 1 times [2022-12-13 11:22:41,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:22:41,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282270822] [2022-12-13 11:22:41,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:22:41,501 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 11:22:41,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:22:41,503 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:41,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:22:41,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:22:41,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:22:41,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:22:41,711 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-13 11:22:41,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-13 11:22:41,728 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 88 treesize of output 84 [2022-12-13 11:22:41,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:22:41,780 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 12 treesize of output 14 [2022-12-13 11:22:41,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:22:41,806 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 12 treesize of output 14 [2022-12-13 11:22:41,865 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 11:22:41,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:22:41,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:22:41,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282270822] [2022-12-13 11:22:41,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282270822] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:22:41,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:22:41,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:22:41,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402226904] [2022-12-13 11:22:41,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:22:41,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:22:41,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:22:41,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:22:41,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:22:42,340 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 353 out of 852 [2022-12-13 11:22:42,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 629 flow. Second operand has 5 states, 5 states have (on average 354.6) internal successors, (1773), 5 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:42,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:22:42,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 353 of 852 [2022-12-13 11:22:42,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:22:44,523 INFO L130 PetriNetUnfolder]: 15241/19541 cut-off events. [2022-12-13 11:22:44,523 INFO L131 PetriNetUnfolder]: For 1159/1259 co-relation queries the response was YES. [2022-12-13 11:22:44,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43088 conditions, 19541 events. 15241/19541 cut-off events. For 1159/1259 co-relation queries the response was YES. Maximal size of possible extension queue 1072. Compared 101078 event pairs, 7280 based on Foata normal form. 100/7550 useless extension candidates. Maximal degree in co-relation 43058. Up to 19378 conditions per place. [2022-12-13 11:22:44,593 INFO L137 encePairwiseOnDemand]: 849/852 looper letters, 90 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2022-12-13 11:22:44,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 95 transitions, 807 flow [2022-12-13 11:22:44,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:22:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:22:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1101 transitions. [2022-12-13 11:22:44,596 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4307511737089202 [2022-12-13 11:22:44,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1101 transitions. [2022-12-13 11:22:44,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1101 transitions. [2022-12-13 11:22:44,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:22:44,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1101 transitions. [2022-12-13 11:22:44,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 367.0) internal successors, (1101), 3 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:44,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:22:44,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:22:44,600 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 629 flow. Second operand 3 states and 1101 transitions. [2022-12-13 11:22:44,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 95 transitions, 807 flow [2022-12-13 11:22:44,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 95 transitions, 775 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 11:22:44,605 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 595 flow [2022-12-13 11:22:44,606 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=595, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2022-12-13 11:22:44,606 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2022-12-13 11:22:44,606 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 595 flow [2022-12-13 11:22:44,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 354.6) internal successors, (1773), 5 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:44,606 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:22:44,606 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:22:44,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:44,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:44,808 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:22:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:22:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash -640613690, now seen corresponding path program 1 times [2022-12-13 11:22:44,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:22:44,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631354616] [2022-12-13 11:22:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:22:44,810 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 11:22:44,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:22:44,813 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:44,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:22:44,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:22:44,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:22:44,977 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 11:22:44,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-12-13 11:22:45,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:22:45,006 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 20 [2022-12-13 11:22:45,033 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 11:22:45,033 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 11:22:45,071 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 11:22:45,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:22:45,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:22:45,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631354616] [2022-12-13 11:22:45,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631354616] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:22:45,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:22:45,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:22:45,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364070650] [2022-12-13 11:22:45,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:22:45,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:22:45,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:22:45,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:22:45,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:22:45,419 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 852 [2022-12-13 11:22:45,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 595 flow. Second operand has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:45,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:22:45,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 852 [2022-12-13 11:22:45,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:22:47,779 INFO L130 PetriNetUnfolder]: 14654/18731 cut-off events. [2022-12-13 11:22:47,779 INFO L131 PetriNetUnfolder]: For 1082/1177 co-relation queries the response was YES. [2022-12-13 11:22:47,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41282 conditions, 18731 events. 14654/18731 cut-off events. For 1082/1177 co-relation queries the response was YES. Maximal size of possible extension queue 1036. Compared 95895 event pairs, 6997 based on Foata normal form. 95/7342 useless extension candidates. Maximal degree in co-relation 41251. Up to 18568 conditions per place. [2022-12-13 11:22:47,846 INFO L137 encePairwiseOnDemand]: 849/852 looper letters, 88 selfloop transitions, 1 changer transitions 0/93 dead transitions. [2022-12-13 11:22:47,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 93 transitions, 769 flow [2022-12-13 11:22:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:22:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:22:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1093 transitions. [2022-12-13 11:22:47,849 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4276212832550861 [2022-12-13 11:22:47,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1093 transitions. [2022-12-13 11:22:47,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1093 transitions. [2022-12-13 11:22:47,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:22:47,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1093 transitions. [2022-12-13 11:22:47,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.3333333333333) internal successors, (1093), 3 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:47,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:22:47,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 852.0) internal successors, (3408), 4 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 11:22:47,853 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 595 flow. Second operand 3 states and 1093 transitions. [2022-12-13 11:22:47,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 93 transitions, 769 flow [2022-12-13 11:22:47,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 93 transitions, 768 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:22:47,858 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 592 flow [2022-12-13 11:22:47,858 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=592, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2022-12-13 11:22:47,859 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 17 predicate places. [2022-12-13 11:22:47,859 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 592 flow [2022-12-13 11:22:47,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:47,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:22:47,859 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:22:47,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:48,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:48,060 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:22:48,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:22:48,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1615798722, now seen corresponding path program 1 times [2022-12-13 11:22:48,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:22:48,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388557192] [2022-12-13 11:22:48,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:22:48,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:22:48,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:22:48,065 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:48,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:22:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:22:48,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:22:48,206 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 11:22:48,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:22:48,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:22:48,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388557192] [2022-12-13 11:22:48,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388557192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:22:48,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:22:48,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:22:48,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873104773] [2022-12-13 11:22:48,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:22:48,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:22:48,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:22:48,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:22:48,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:22:48,380 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 852 [2022-12-13 11:22:48,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 93 transitions, 592 flow. Second operand has 5 states, 5 states have (on average 347.8) internal successors, (1739), 5 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:48,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:22:48,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 852 [2022-12-13 11:22:48,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:22:50,488 INFO L130 PetriNetUnfolder]: 11879/15840 cut-off events. [2022-12-13 11:22:50,488 INFO L131 PetriNetUnfolder]: For 1366/1426 co-relation queries the response was YES. [2022-12-13 11:22:50,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35429 conditions, 15840 events. 11879/15840 cut-off events. For 1366/1426 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 88403 event pairs, 6568 based on Foata normal form. 60/7126 useless extension candidates. Maximal degree in co-relation 35397. Up to 15034 conditions per place. [2022-12-13 11:22:50,556 INFO L137 encePairwiseOnDemand]: 841/852 looper letters, 100 selfloop transitions, 28 changer transitions 0/131 dead transitions. [2022-12-13 11:22:50,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 131 transitions, 938 flow [2022-12-13 11:22:50,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:22:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:22:50,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1817 transitions. [2022-12-13 11:22:50,560 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42652582159624414 [2022-12-13 11:22:50,560 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1817 transitions. [2022-12-13 11:22:50,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1817 transitions. [2022-12-13 11:22:50,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:22:50,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1817 transitions. [2022-12-13 11:22:50,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 363.4) internal successors, (1817), 5 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:50,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 852.0) internal successors, (5112), 6 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:50,565 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 852.0) internal successors, (5112), 6 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:50,565 INFO L175 Difference]: Start difference. First operand has 80 places, 93 transitions, 592 flow. Second operand 5 states and 1817 transitions. [2022-12-13 11:22:50,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 131 transitions, 938 flow [2022-12-13 11:22:50,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 131 transitions, 937 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:22:50,571 INFO L231 Difference]: Finished difference. Result has 85 places, 94 transitions, 662 flow [2022-12-13 11:22:50,571 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=662, PETRI_PLACES=85, PETRI_TRANSITIONS=94} [2022-12-13 11:22:50,572 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2022-12-13 11:22:50,572 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 94 transitions, 662 flow [2022-12-13 11:22:50,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 347.8) internal successors, (1739), 5 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:22:50,572 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:22:50,572 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:22:50,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-12-13 11:22:50,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:50,774 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:22:50,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:22:50,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1296032999, now seen corresponding path program 1 times [2022-12-13 11:22:50,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:22:50,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482864065] [2022-12-13 11:22:50,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:22:50,776 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 11:22:50,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:22:50,778 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:50,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:22:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:22:50,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 11:22:50,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:22:51,040 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:22:51,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:22:51,133 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 11:22:51,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 11:22:51,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:22:51,211 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 11:22:51,221 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:22:51,221 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 11:22:51,257 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-13 11:22:51,257 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 16 treesize of output 18 [2022-12-13 11:22:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:22:51,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:22:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:22:53,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:22:53,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482864065] [2022-12-13 11:22:53,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482864065] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:22:53,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:22:53,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:22:53,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233911707] [2022-12-13 11:22:53,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:22:53,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:22:53,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:22:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:22:53,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:23:01,387 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 852 [2022-12-13 11:23:01,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 94 transitions, 662 flow. Second operand has 12 states, 12 states have (on average 320.6666666666667) internal successors, (3848), 12 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:01,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:23:01,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 852 [2022-12-13 11:23:01,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:23:12,504 WARN L233 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:23:13,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:23:17,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:23:19,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:23:21,103 WARN L539 Checker$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 11:23:43,193 INFO L130 PetriNetUnfolder]: 35131/46151 cut-off events. [2022-12-13 11:23:43,193 INFO L131 PetriNetUnfolder]: For 6925/6997 co-relation queries the response was YES. [2022-12-13 11:23:43,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111149 conditions, 46151 events. 35131/46151 cut-off events. For 6925/6997 co-relation queries the response was YES. Maximal size of possible extension queue 2690. Compared 290248 event pairs, 14125 based on Foata normal form. 180/22268 useless extension candidates. Maximal degree in co-relation 111114. Up to 11731 conditions per place. [2022-12-13 11:23:43,420 INFO L137 encePairwiseOnDemand]: 838/852 looper letters, 351 selfloop transitions, 76 changer transitions 0/430 dead transitions. [2022-12-13 11:23:43,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 430 transitions, 2670 flow [2022-12-13 11:23:43,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 11:23:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 11:23:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 6774 transitions. [2022-12-13 11:23:43,431 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39753521126760566 [2022-12-13 11:23:43,431 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 6774 transitions. [2022-12-13 11:23:43,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 6774 transitions. [2022-12-13 11:23:43,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:23:43,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 6774 transitions. [2022-12-13 11:23:43,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 338.7) internal successors, (6774), 20 states have internal predecessors, (6774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:43,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 852.0) internal successors, (17892), 21 states have internal predecessors, (17892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:43,449 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 852.0) internal successors, (17892), 21 states have internal predecessors, (17892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:43,449 INFO L175 Difference]: Start difference. First operand has 85 places, 94 transitions, 662 flow. Second operand 20 states and 6774 transitions. [2022-12-13 11:23:43,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 430 transitions, 2670 flow [2022-12-13 11:23:43,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 430 transitions, 2586 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:23:43,480 INFO L231 Difference]: Finished difference. Result has 110 places, 133 transitions, 1132 flow [2022-12-13 11:23:43,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1132, PETRI_PLACES=110, PETRI_TRANSITIONS=133} [2022-12-13 11:23:43,481 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 47 predicate places. [2022-12-13 11:23:43,481 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 133 transitions, 1132 flow [2022-12-13 11:23:43,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 320.6666666666667) internal successors, (3848), 12 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:43,481 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:23:43,482 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:23:43,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:23:43,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:23:43,683 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:23:43,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:23:43,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1296033000, now seen corresponding path program 1 times [2022-12-13 11:23:43,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:23:43,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082240596] [2022-12-13 11:23:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:23:43,686 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 11:23:43,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:23:43,689 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:23:43,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:23:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:23:43,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:23:43,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:23:43,919 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 11:23:43,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 11:23:43,952 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 11:23:43,952 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 11:23:43,969 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 11:23:43,970 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 11:23:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:23:43,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:23:43,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:23:43,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082240596] [2022-12-13 11:23:43,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082240596] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:23:43,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:23:43,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:23:43,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879961869] [2022-12-13 11:23:43,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:23:43,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:23:43,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:23:43,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:23:43,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:23:44,189 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 852 [2022-12-13 11:23:44,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 133 transitions, 1132 flow. Second operand has 4 states, 4 states have (on average 344.25) internal successors, (1377), 4 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:44,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:23:44,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 852 [2022-12-13 11:23:44,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:23:48,592 INFO L130 PetriNetUnfolder]: 24587/31996 cut-off events. [2022-12-13 11:23:48,592 INFO L131 PetriNetUnfolder]: For 30659/31457 co-relation queries the response was YES. [2022-12-13 11:23:48,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93316 conditions, 31996 events. 24587/31996 cut-off events. For 30659/31457 co-relation queries the response was YES. Maximal size of possible extension queue 1741. Compared 182144 event pairs, 12394 based on Foata normal form. 3071/19303 useless extension candidates. Maximal degree in co-relation 93273. Up to 31738 conditions per place. [2022-12-13 11:23:48,774 INFO L137 encePairwiseOnDemand]: 848/852 looper letters, 108 selfloop transitions, 12 changer transitions 0/131 dead transitions. [2022-12-13 11:23:48,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 131 transitions, 1366 flow [2022-12-13 11:23:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:23:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:23:48,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1406 transitions. [2022-12-13 11:23:48,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4125586854460094 [2022-12-13 11:23:48,778 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1406 transitions. [2022-12-13 11:23:48,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1406 transitions. [2022-12-13 11:23:48,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:23:48,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1406 transitions. [2022-12-13 11:23:48,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 351.5) internal successors, (1406), 4 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:48,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 852.0) internal successors, (4260), 5 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:48,783 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 852.0) internal successors, (4260), 5 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:48,783 INFO L175 Difference]: Start difference. First operand has 110 places, 133 transitions, 1132 flow. Second operand 4 states and 1406 transitions. [2022-12-13 11:23:48,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 131 transitions, 1366 flow [2022-12-13 11:23:48,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 131 transitions, 1246 flow, removed 31 selfloop flow, removed 4 redundant places. [2022-12-13 11:23:48,833 INFO L231 Difference]: Finished difference. Result has 107 places, 131 transitions, 1030 flow [2022-12-13 11:23:48,833 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1030, PETRI_PLACES=107, PETRI_TRANSITIONS=131} [2022-12-13 11:23:48,834 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 44 predicate places. [2022-12-13 11:23:48,834 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 131 transitions, 1030 flow [2022-12-13 11:23:48,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 344.25) internal successors, (1377), 4 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:48,834 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:23:48,834 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:23:48,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:23:49,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:23:49,036 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:23:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:23:49,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1981708484, now seen corresponding path program 1 times [2022-12-13 11:23:49,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:23:49,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908186813] [2022-12-13 11:23:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:23:49,039 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 11:23:49,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:23:49,042 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:23:49,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:23:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:23:49,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:23:49,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:23:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:23:49,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:23:49,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:23:49,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908186813] [2022-12-13 11:23:49,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908186813] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:23:49,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:23:49,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:23:49,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107481444] [2022-12-13 11:23:49,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:23:49,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:23:49,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:23:49,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:23:49,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:23:49,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 852 [2022-12-13 11:23:49,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 131 transitions, 1030 flow. Second operand has 5 states, 5 states have (on average 348.2) internal successors, (1741), 5 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:49,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:23:49,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 852 [2022-12-13 11:23:49,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:23:53,235 INFO L130 PetriNetUnfolder]: 21249/28588 cut-off events. [2022-12-13 11:23:53,235 INFO L131 PetriNetUnfolder]: For 35773/36524 co-relation queries the response was YES. [2022-12-13 11:23:53,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86720 conditions, 28588 events. 21249/28588 cut-off events. For 35773/36524 co-relation queries the response was YES. Maximal size of possible extension queue 1782. Compared 176137 event pairs, 12809 based on Foata normal form. 751/17394 useless extension candidates. Maximal degree in co-relation 86678. Up to 28384 conditions per place. [2022-12-13 11:23:53,386 INFO L137 encePairwiseOnDemand]: 838/852 looper letters, 100 selfloop transitions, 45 changer transitions 0/155 dead transitions. [2022-12-13 11:23:53,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 155 transitions, 1388 flow [2022-12-13 11:23:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:23:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:23:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1804 transitions. [2022-12-13 11:23:53,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42347417840375584 [2022-12-13 11:23:53,390 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1804 transitions. [2022-12-13 11:23:53,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1804 transitions. [2022-12-13 11:23:53,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:23:53,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1804 transitions. [2022-12-13 11:23:53,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 360.8) internal successors, (1804), 5 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:53,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 852.0) internal successors, (5112), 6 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:53,395 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 852.0) internal successors, (5112), 6 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:53,395 INFO L175 Difference]: Start difference. First operand has 107 places, 131 transitions, 1030 flow. Second operand 5 states and 1804 transitions. [2022-12-13 11:23:53,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 155 transitions, 1388 flow [2022-12-13 11:23:53,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 155 transitions, 1375 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:23:53,445 INFO L231 Difference]: Finished difference. Result has 111 places, 132 transitions, 1129 flow [2022-12-13 11:23:53,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1129, PETRI_PLACES=111, PETRI_TRANSITIONS=132} [2022-12-13 11:23:53,445 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 48 predicate places. [2022-12-13 11:23:53,445 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 132 transitions, 1129 flow [2022-12-13 11:23:53,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 348.2) internal successors, (1741), 5 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:53,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:23:53,446 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:23:53,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:23:53,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:23:53,647 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:23:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:23:53,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1522303394, now seen corresponding path program 1 times [2022-12-13 11:23:53,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:23:53,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616072853] [2022-12-13 11:23:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:23:53,650 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 11:23:53,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:23:53,653 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:23:53,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:23:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:23:53,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:23:53,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:23:53,878 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 11:23:53,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:23:53,999 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 11:23:53,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:23:53,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616072853] [2022-12-13 11:23:53,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616072853] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:23:53,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:23:53,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:23:53,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368030150] [2022-12-13 11:23:53,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:23:54,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:23:54,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:23:54,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:23:54,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:23:55,259 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 852 [2022-12-13 11:23:55,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 132 transitions, 1129 flow. Second operand has 12 states, 12 states have (on average 340.8333333333333) internal successors, (4090), 12 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:23:55,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:23:55,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 852 [2022-12-13 11:23:55,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:24:01,425 INFO L130 PetriNetUnfolder]: 24333/32031 cut-off events. [2022-12-13 11:24:01,425 INFO L131 PetriNetUnfolder]: For 23876/23911 co-relation queries the response was YES. [2022-12-13 11:24:01,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95692 conditions, 32031 events. 24333/32031 cut-off events. For 23876/23911 co-relation queries the response was YES. Maximal size of possible extension queue 1817. Compared 186863 event pairs, 6010 based on Foata normal form. 498/18557 useless extension candidates. Maximal degree in co-relation 95648. Up to 13059 conditions per place. [2022-12-13 11:24:01,615 INFO L137 encePairwiseOnDemand]: 838/852 looper letters, 162 selfloop transitions, 74 changer transitions 0/240 dead transitions. [2022-12-13 11:24:01,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 240 transitions, 1975 flow [2022-12-13 11:24:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:24:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 11:24:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4911 transitions. [2022-12-13 11:24:01,622 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41172032193158953 [2022-12-13 11:24:01,622 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4911 transitions. [2022-12-13 11:24:01,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4911 transitions. [2022-12-13 11:24:01,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:24:01,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4911 transitions. [2022-12-13 11:24:01,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 350.7857142857143) internal successors, (4911), 14 states have internal predecessors, (4911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:24:01,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 852.0) internal successors, (12780), 15 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:24:01,635 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 852.0) internal successors, (12780), 15 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:24:01,635 INFO L175 Difference]: Start difference. First operand has 111 places, 132 transitions, 1129 flow. Second operand 14 states and 4911 transitions. [2022-12-13 11:24:01,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 240 transitions, 1975 flow [2022-12-13 11:24:01,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 240 transitions, 1885 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 11:24:01,750 INFO L231 Difference]: Finished difference. Result has 126 places, 139 transitions, 1329 flow [2022-12-13 11:24:01,750 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1329, PETRI_PLACES=126, PETRI_TRANSITIONS=139} [2022-12-13 11:24:01,750 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 63 predicate places. [2022-12-13 11:24:01,750 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 139 transitions, 1329 flow [2022-12-13 11:24:01,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 340.8333333333333) internal successors, (4090), 12 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:24:01,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:24:01,751 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 11:24:01,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:24:01,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:24:01,953 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:24:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:24:01,954 INFO L85 PathProgramCache]: Analyzing trace with hash -219093683, now seen corresponding path program 3 times [2022-12-13 11:24:01,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:24:01,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895959706] [2022-12-13 11:24:01,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:24:01,955 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 11:24:01,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:24:01,958 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:24:01,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:24:02,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 11:24:02,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:24:02,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:24:02,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:24:02,256 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:24:02,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:24:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:24:02,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:24:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:24:04,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:24:04,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895959706] [2022-12-13 11:24:04,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895959706] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:24:04,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:24:04,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 11:24:04,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816287925] [2022-12-13 11:24:04,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:24:04,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 11:24:04,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:24:04,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 11:24:04,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 11:24:32,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 852 [2022-12-13 11:24:32,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 139 transitions, 1329 flow. Second operand has 24 states, 24 states have (on average 337.0) internal successors, (8088), 24 states have internal predecessors, (8088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:24:32,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:24:32,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 852 [2022-12-13 11:24:32,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:24:44,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:24:46,220 WARN L539 Checker$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 11:24:48,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:24:50,226 WARN L539 Checker$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 11:24:52,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:24:54,231 WARN L539 Checker$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 11:24:56,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:24:58,236 WARN L539 Checker$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 11:25:00,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:25:02,266 WARN L539 Checker$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 11:25:08,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:25:10,174 WARN L539 Checker$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 11:25:12,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:25:14,179 WARN L539 Checker$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 11:25:16,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:25:18,184 WARN L539 Checker$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 11:25:20,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:25:22,190 WARN L539 Checker$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 11:25:24,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:25:26,223 WARN L539 Checker$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 11:25:40,733 INFO L130 PetriNetUnfolder]: 43352/57088 cut-off events. [2022-12-13 11:25:40,733 INFO L131 PetriNetUnfolder]: For 193568/196077 co-relation queries the response was YES. [2022-12-13 11:25:40,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193547 conditions, 57088 events. 43352/57088 cut-off events. For 193568/196077 co-relation queries the response was YES. Maximal size of possible extension queue 2118. Compared 350828 event pairs, 22657 based on Foata normal form. 2539/37562 useless extension candidates. Maximal degree in co-relation 193499. Up to 14995 conditions per place. [2022-12-13 11:25:41,138 INFO L137 encePairwiseOnDemand]: 842/852 looper letters, 376 selfloop transitions, 109 changer transitions 0/497 dead transitions. [2022-12-13 11:25:41,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 497 transitions, 4088 flow [2022-12-13 11:25:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 11:25:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 11:25:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 8514 transitions. [2022-12-13 11:25:41,150 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4163732394366197 [2022-12-13 11:25:41,150 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 8514 transitions. [2022-12-13 11:25:41,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 8514 transitions. [2022-12-13 11:25:41,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:25:41,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 8514 transitions. [2022-12-13 11:25:41,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 354.75) internal successors, (8514), 24 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:25:41,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 852.0) internal successors, (21300), 25 states have internal predecessors, (21300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:25:41,171 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 852.0) internal successors, (21300), 25 states have internal predecessors, (21300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:25:41,171 INFO L175 Difference]: Start difference. First operand has 126 places, 139 transitions, 1329 flow. Second operand 24 states and 8514 transitions. [2022-12-13 11:25:41,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 497 transitions, 4088 flow [2022-12-13 11:25:41,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 497 transitions, 3995 flow, removed 11 selfloop flow, removed 3 redundant places. [2022-12-13 11:25:41,449 INFO L231 Difference]: Finished difference. Result has 163 places, 177 transitions, 2019 flow [2022-12-13 11:25:41,449 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2019, PETRI_PLACES=163, PETRI_TRANSITIONS=177} [2022-12-13 11:25:41,449 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 100 predicate places. [2022-12-13 11:25:41,450 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 177 transitions, 2019 flow [2022-12-13 11:25:41,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 337.0) internal successors, (8088), 24 states have internal predecessors, (8088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:25:41,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:25:41,451 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:25:41,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:25:41,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:25:41,652 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:25:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:25:41,653 INFO L85 PathProgramCache]: Analyzing trace with hash 67782840, now seen corresponding path program 1 times [2022-12-13 11:25:41,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:25:41,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562847818] [2022-12-13 11:25:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:25:41,655 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 11:25:41,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:25:41,658 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:25:41,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:25:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:25:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 11:25:41,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:25:41,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 11:25:41,983 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 11:25:42,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:25:42,033 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 11:25:42,041 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:25:42,041 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 11:25:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:25:42,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:25:42,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:25:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:25:42,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:25:42,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562847818] [2022-12-13 11:25:42,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562847818] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:25:42,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:25:42,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:25:42,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420854784] [2022-12-13 11:25:42,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:25:42,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:25:42,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:25:42,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:25:42,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:25:45,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:25:47,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:25:50,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:25:53,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:25:57,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:25:57,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 852 [2022-12-13 11:25:57,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 177 transitions, 2019 flow. Second operand has 12 states, 12 states have (on average 316.0) internal successors, (3792), 12 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:25:57,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:25:57,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 852 [2022-12-13 11:25:57,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:26:12,074 WARN L539 Checker$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 11:26:25,063 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 11:26:41,078 INFO L130 PetriNetUnfolder]: 67655/90998 cut-off events. [2022-12-13 11:26:41,078 INFO L131 PetriNetUnfolder]: For 332266/337019 co-relation queries the response was YES. [2022-12-13 11:26:41,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312949 conditions, 90998 events. 67655/90998 cut-off events. For 332266/337019 co-relation queries the response was YES. Maximal size of possible extension queue 3531. Compared 627888 event pairs, 24840 based on Foata normal form. 4824/63020 useless extension candidates. Maximal degree in co-relation 312884. Up to 39474 conditions per place. [2022-12-13 11:26:42,019 INFO L137 encePairwiseOnDemand]: 838/852 looper letters, 321 selfloop transitions, 98 changer transitions 0/429 dead transitions. [2022-12-13 11:26:42,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 429 transitions, 3826 flow [2022-12-13 11:26:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 11:26:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 11:26:42,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 8805 transitions. [2022-12-13 11:26:42,029 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38275952008346376 [2022-12-13 11:26:42,030 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 8805 transitions. [2022-12-13 11:26:42,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 8805 transitions. [2022-12-13 11:26:42,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:26:42,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 8805 transitions. [2022-12-13 11:26:42,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 326.1111111111111) internal successors, (8805), 27 states have internal predecessors, (8805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:42,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 852.0) internal successors, (23856), 28 states have internal predecessors, (23856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:42,051 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 852.0) internal successors, (23856), 28 states have internal predecessors, (23856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:42,051 INFO L175 Difference]: Start difference. First operand has 163 places, 177 transitions, 2019 flow. Second operand 27 states and 8805 transitions. [2022-12-13 11:26:42,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 429 transitions, 3826 flow [2022-12-13 11:26:42,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 429 transitions, 3613 flow, removed 44 selfloop flow, removed 6 redundant places. [2022-12-13 11:26:42,445 INFO L231 Difference]: Finished difference. Result has 189 places, 187 transitions, 2104 flow [2022-12-13 11:26:42,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2104, PETRI_PLACES=189, PETRI_TRANSITIONS=187} [2022-12-13 11:26:42,445 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 126 predicate places. [2022-12-13 11:26:42,445 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 187 transitions, 2104 flow [2022-12-13 11:26:42,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 316.0) internal successors, (3792), 12 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:42,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:26:42,446 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:26:42,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-12-13 11:26:42,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:26:42,647 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:26:42,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:26:42,648 INFO L85 PathProgramCache]: Analyzing trace with hash 67782839, now seen corresponding path program 1 times [2022-12-13 11:26:42,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:26:42,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482693412] [2022-12-13 11:26:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:26:42,649 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 11:26:42,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:26:42,652 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:26:42,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:26:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:26:42,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:26:42,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:26:42,824 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 11:26:42,839 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 11:26:42,839 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 11:26:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:26:42,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:26:42,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:26:42,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482693412] [2022-12-13 11:26:42,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482693412] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:26:42,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:26:42,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:26:42,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069088045] [2022-12-13 11:26:42,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:26:42,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:26:42,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:26:42,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:26:42,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:26:43,177 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 852 [2022-12-13 11:26:43,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 187 transitions, 2104 flow. Second operand has 4 states, 4 states have (on average 344.75) internal successors, (1379), 4 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:43,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:26:43,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 852 [2022-12-13 11:26:43,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:26:52,613 INFO L130 PetriNetUnfolder]: 36364/49987 cut-off events. [2022-12-13 11:26:52,614 INFO L131 PetriNetUnfolder]: For 238251/243022 co-relation queries the response was YES. [2022-12-13 11:26:52,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201939 conditions, 49987 events. 36364/49987 cut-off events. For 238251/243022 co-relation queries the response was YES. Maximal size of possible extension queue 1946. Compared 335253 event pairs, 21925 based on Foata normal form. 9287/43820 useless extension candidates. Maximal degree in co-relation 201867. Up to 49481 conditions per place. [2022-12-13 11:26:53,104 INFO L137 encePairwiseOnDemand]: 848/852 looper letters, 140 selfloop transitions, 28 changer transitions 0/185 dead transitions. [2022-12-13 11:26:53,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 185 transitions, 2432 flow [2022-12-13 11:26:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:26:53,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:26:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1404 transitions. [2022-12-13 11:26:53,107 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4119718309859155 [2022-12-13 11:26:53,107 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1404 transitions. [2022-12-13 11:26:53,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1404 transitions. [2022-12-13 11:26:53,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:26:53,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1404 transitions. [2022-12-13 11:26:53,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 351.0) internal successors, (1404), 4 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 11:26:53,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 852.0) internal successors, (4260), 5 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:53,110 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 852.0) internal successors, (4260), 5 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:53,111 INFO L175 Difference]: Start difference. First operand has 189 places, 187 transitions, 2104 flow. Second operand 4 states and 1404 transitions. [2022-12-13 11:26:53,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 185 transitions, 2432 flow [2022-12-13 11:26:53,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 185 transitions, 2382 flow, removed 16 selfloop flow, removed 4 redundant places. [2022-12-13 11:26:53,908 INFO L231 Difference]: Finished difference. Result has 186 places, 185 transitions, 2102 flow [2022-12-13 11:26:53,908 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=2046, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2102, PETRI_PLACES=186, PETRI_TRANSITIONS=185} [2022-12-13 11:26:53,908 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 123 predicate places. [2022-12-13 11:26:53,908 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 185 transitions, 2102 flow [2022-12-13 11:26:53,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 344.75) internal successors, (1379), 4 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:53,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:26:53,909 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:26:53,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-12-13 11:26:54,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:26:54,110 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:26:54,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:26:54,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2101279814, now seen corresponding path program 1 times [2022-12-13 11:26:54,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:26:54,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778251511] [2022-12-13 11:26:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:26:54,113 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 11:26:54,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:26:54,115 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:26:54,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:26:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:26:54,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:26:54,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:26:54,371 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 11:26:54,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:26:54,519 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 11:26:54,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:26:54,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778251511] [2022-12-13 11:26:54,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778251511] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:26:54,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:26:54,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:26:54,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208072282] [2022-12-13 11:26:54,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:26:54,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:26:54,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:26:54,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:26:54,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:26:55,642 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 852 [2022-12-13 11:26:55,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 185 transitions, 2102 flow. Second operand has 12 states, 12 states have (on average 341.1666666666667) internal successors, (4094), 12 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:26:55,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:26:55,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 852 [2022-12-13 11:26:55,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:27:07,324 INFO L130 PetriNetUnfolder]: 43008/58279 cut-off events. [2022-12-13 11:27:07,324 INFO L131 PetriNetUnfolder]: For 261098/263990 co-relation queries the response was YES. [2022-12-13 11:27:07,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227017 conditions, 58279 events. 43008/58279 cut-off events. For 261098/263990 co-relation queries the response was YES. Maximal size of possible extension queue 2314. Compared 388676 event pairs, 14779 based on Foata normal form. 3514/45100 useless extension candidates. Maximal degree in co-relation 226945. Up to 33189 conditions per place. [2022-12-13 11:27:07,851 INFO L137 encePairwiseOnDemand]: 838/852 looper letters, 179 selfloop transitions, 93 changer transitions 0/282 dead transitions. [2022-12-13 11:27:07,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 282 transitions, 3044 flow [2022-12-13 11:27:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:27:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 11:27:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4898 transitions. [2022-12-13 11:27:07,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4106304493628437 [2022-12-13 11:27:07,857 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4898 transitions. [2022-12-13 11:27:07,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4898 transitions. [2022-12-13 11:27:07,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:27:07,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4898 transitions. [2022-12-13 11:27:07,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 349.85714285714283) internal successors, (4898), 14 states have internal predecessors, (4898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:07,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 852.0) internal successors, (12780), 15 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:07,868 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 852.0) internal successors, (12780), 15 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:07,868 INFO L175 Difference]: Start difference. First operand has 186 places, 185 transitions, 2102 flow. Second operand 14 states and 4898 transitions. [2022-12-13 11:27:07,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 282 transitions, 3044 flow [2022-12-13 11:27:09,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 282 transitions, 3011 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 11:27:09,020 INFO L231 Difference]: Finished difference. Result has 198 places, 187 transitions, 2272 flow [2022-12-13 11:27:09,020 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2272, PETRI_PLACES=198, PETRI_TRANSITIONS=187} [2022-12-13 11:27:09,020 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 135 predicate places. [2022-12-13 11:27:09,020 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 187 transitions, 2272 flow [2022-12-13 11:27:09,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 341.1666666666667) internal successors, (4094), 12 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:09,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:09,021 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:27:09,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:27:09,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:27:09,222 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:27:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:09,223 INFO L85 PathProgramCache]: Analyzing trace with hash 962566225, now seen corresponding path program 2 times [2022-12-13 11:27:09,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:27:09,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370417792] [2022-12-13 11:27:09,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:27:09,226 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 11:27:09,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:27:09,229 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:27:09,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:27:09,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 11:27:09,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:27:09,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 11:27:09,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:27:09,451 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:27:09,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:27:09,574 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 11:27:09,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 11:27:09,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:27:09,666 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 11:27:09,675 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:27:09,675 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 11:27:09,721 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-13 11:27:09,722 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 16 treesize of output 18 [2022-12-13 11:27:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 11:27:09,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:27:09,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:27:09,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370417792] [2022-12-13 11:27:09,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370417792] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:27:09,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:27:09,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:27:09,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879481308] [2022-12-13 11:27:09,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:27:09,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:27:09,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:27:09,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:27:09,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:27:10,617 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 852 [2022-12-13 11:27:10,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 187 transitions, 2272 flow. Second operand has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:10,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:27:10,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 852 [2022-12-13 11:27:10,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:27:23,761 INFO L130 PetriNetUnfolder]: 45624/62492 cut-off events. [2022-12-13 11:27:23,762 INFO L131 PetriNetUnfolder]: For 259565/262646 co-relation queries the response was YES. [2022-12-13 11:27:24,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245820 conditions, 62492 events. 45624/62492 cut-off events. For 259565/262646 co-relation queries the response was YES. Maximal size of possible extension queue 2482. Compared 415659 event pairs, 12857 based on Foata normal form. 4083/47203 useless extension candidates. Maximal degree in co-relation 245747. Up to 39377 conditions per place. [2022-12-13 11:27:24,458 INFO L137 encePairwiseOnDemand]: 847/852 looper letters, 169 selfloop transitions, 38 changer transitions 0/216 dead transitions. [2022-12-13 11:27:24,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 216 transitions, 2835 flow [2022-12-13 11:27:24,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:27:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:27:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1753 transitions. [2022-12-13 11:27:24,462 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41150234741784036 [2022-12-13 11:27:24,462 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1753 transitions. [2022-12-13 11:27:24,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1753 transitions. [2022-12-13 11:27:24,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:27:24,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1753 transitions. [2022-12-13 11:27:24,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 350.6) internal successors, (1753), 5 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:24,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 852.0) internal successors, (5112), 6 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:24,466 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 852.0) internal successors, (5112), 6 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:24,467 INFO L175 Difference]: Start difference. First operand has 198 places, 187 transitions, 2272 flow. Second operand 5 states and 1753 transitions. [2022-12-13 11:27:24,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 216 transitions, 2835 flow [2022-12-13 11:27:26,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 216 transitions, 2663 flow, removed 8 selfloop flow, removed 6 redundant places. [2022-12-13 11:27:26,165 INFO L231 Difference]: Finished difference. Result has 197 places, 188 transitions, 2217 flow [2022-12-13 11:27:26,165 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2217, PETRI_PLACES=197, PETRI_TRANSITIONS=188} [2022-12-13 11:27:26,165 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 134 predicate places. [2022-12-13 11:27:26,165 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 188 transitions, 2217 flow [2022-12-13 11:27:26,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:26,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:26,166 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:27:26,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-12-13 11:27:26,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:27:26,367 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:27:26,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:26,368 INFO L85 PathProgramCache]: Analyzing trace with hash -443796077, now seen corresponding path program 2 times [2022-12-13 11:27:26,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:27:26,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044665292] [2022-12-13 11:27:26,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:27:26,370 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 11:27:26,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:27:26,373 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:27:26,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:27:26,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:27:26,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:27:26,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:27:26,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:27:26,690 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 11:27:26,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 11:27:26,797 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 11:27:26,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 11:27:26,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:27:26,863 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 11:27:26,885 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 11:27:26,885 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 11:27:26,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:27:26,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 11:27:26,990 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-13 11:27:26,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 11:27:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:27:27,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:27:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:27:34,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:27:34,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044665292] [2022-12-13 11:27:34,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044665292] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:27:34,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:27:34,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 11:27:34,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132120281] [2022-12-13 11:27:34,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:27:34,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:27:34,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:27:34,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:27:34,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=191, Unknown=1, NotChecked=0, Total=240 [2022-12-13 11:27:36,774 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 11:27:39,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:27:41,187 WARN L539 Checker$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 11:27:43,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:27:48,103 WARN L539 Checker$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 11:27:52,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:27:55,839 WARN L539 Checker$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 11:27:58,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:00,486 WARN L539 Checker$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 11:28:02,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:05,227 WARN L539 Checker$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 11:28:08,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:11,509 WARN L539 Checker$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 11:28:13,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:16,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:18,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:20,282 WARN L539 Checker$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 11:28:22,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:24,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:27,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:30,038 WARN L539 Checker$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 11:28:33,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:34,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:37,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:38,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:40,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:42,939 WARN L539 Checker$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 11:28:45,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:28:47,681 WARN L539 Checker$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 11:28:48,264 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 852 [2022-12-13 11:28:48,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 188 transitions, 2217 flow. Second operand has 16 states, 16 states have (on average 292.5) internal successors, (4680), 16 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:48,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:28:48,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 852 [2022-12-13 11:28:48,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:29:09,044 INFO L130 PetriNetUnfolder]: 59521/82312 cut-off events. [2022-12-13 11:29:09,044 INFO L131 PetriNetUnfolder]: For 382694/386755 co-relation queries the response was YES. [2022-12-13 11:29:09,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336302 conditions, 82312 events. 59521/82312 cut-off events. For 382694/386755 co-relation queries the response was YES. Maximal size of possible extension queue 3355. Compared 588349 event pairs, 12530 based on Foata normal form. 5865/63146 useless extension candidates. Maximal degree in co-relation 336228. Up to 33471 conditions per place. [2022-12-13 11:29:09,855 INFO L137 encePairwiseOnDemand]: 843/852 looper letters, 254 selfloop transitions, 77 changer transitions 0/340 dead transitions. [2022-12-13 11:29:09,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 340 transitions, 3446 flow [2022-12-13 11:29:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:29:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 11:29:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3992 transitions. [2022-12-13 11:29:09,861 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3604189237992055 [2022-12-13 11:29:09,861 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3992 transitions. [2022-12-13 11:29:09,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3992 transitions. [2022-12-13 11:29:09,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:29:09,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3992 transitions. [2022-12-13 11:29:09,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 307.0769230769231) internal successors, (3992), 13 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:09,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 852.0) internal successors, (11928), 14 states have internal predecessors, (11928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:09,871 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 852.0) internal successors, (11928), 14 states have internal predecessors, (11928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:09,871 INFO L175 Difference]: Start difference. First operand has 197 places, 188 transitions, 2217 flow. Second operand 13 states and 3992 transitions. [2022-12-13 11:29:09,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 340 transitions, 3446 flow [2022-12-13 11:29:12,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 340 transitions, 3353 flow, removed 15 selfloop flow, removed 3 redundant places. [2022-12-13 11:29:12,179 INFO L231 Difference]: Finished difference. Result has 208 places, 190 transitions, 2369 flow [2022-12-13 11:29:12,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=2135, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2369, PETRI_PLACES=208, PETRI_TRANSITIONS=190} [2022-12-13 11:29:12,179 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 145 predicate places. [2022-12-13 11:29:12,179 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 190 transitions, 2369 flow [2022-12-13 11:29:12,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 292.5) internal successors, (4680), 16 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:12,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:29:12,180 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:29:12,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:29:12,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:29:12,381 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:29:12,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:29:12,382 INFO L85 PathProgramCache]: Analyzing trace with hash 728679886, now seen corresponding path program 1 times [2022-12-13 11:29:12,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:29:12,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36852690] [2022-12-13 11:29:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:29:12,384 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 11:29:12,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:29:12,387 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:29:12,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:29:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:29:12,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 11:29:12,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:29:12,643 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 11:29:12,652 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 11:29:12,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:29:12,693 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 11:29:12,710 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:29:12,710 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 11:29:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:29:12,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:29:13,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:29:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:29:13,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:29:13,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36852690] [2022-12-13 11:29:13,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36852690] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:29:13,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:29:13,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:29:13,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146979412] [2022-12-13 11:29:13,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:29:13,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:29:13,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:29:13,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:29:13,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:29:15,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:29:18,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:29:21,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:29:23,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:29:26,915 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 852 [2022-12-13 11:29:26,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 190 transitions, 2369 flow. Second operand has 12 states, 12 states have (on average 320.3333333333333) internal successors, (3844), 12 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:26,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:29:26,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 852 [2022-12-13 11:29:26,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:29:39,879 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 11:30:06,088 INFO L130 PetriNetUnfolder]: 65541/94446 cut-off events. [2022-12-13 11:30:06,088 INFO L131 PetriNetUnfolder]: For 492795/502048 co-relation queries the response was YES. [2022-12-13 11:30:06,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376347 conditions, 94446 events. 65541/94446 cut-off events. For 492795/502048 co-relation queries the response was YES. Maximal size of possible extension queue 3427. Compared 721330 event pairs, 25515 based on Foata normal form. 9279/78319 useless extension candidates. Maximal degree in co-relation 376271. Up to 36846 conditions per place. [2022-12-13 11:30:07,118 INFO L137 encePairwiseOnDemand]: 836/852 looper letters, 294 selfloop transitions, 108 changer transitions 0/418 dead transitions. [2022-12-13 11:30:07,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 418 transitions, 4166 flow [2022-12-13 11:30:07,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 11:30:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 11:30:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 9201 transitions. [2022-12-13 11:30:07,128 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38568913480885314 [2022-12-13 11:30:07,128 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 9201 transitions. [2022-12-13 11:30:07,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 9201 transitions. [2022-12-13 11:30:07,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:30:07,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 9201 transitions. [2022-12-13 11:30:07,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 328.60714285714283) internal successors, (9201), 28 states have internal predecessors, (9201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:07,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 852.0) internal successors, (24708), 29 states have internal predecessors, (24708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:07,151 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 852.0) internal successors, (24708), 29 states have internal predecessors, (24708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:07,151 INFO L175 Difference]: Start difference. First operand has 208 places, 190 transitions, 2369 flow. Second operand 28 states and 9201 transitions. [2022-12-13 11:30:07,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 418 transitions, 4166 flow [2022-12-13 11:30:08,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 418 transitions, 4059 flow, removed 24 selfloop flow, removed 5 redundant places. [2022-12-13 11:30:08,462 INFO L231 Difference]: Finished difference. Result has 241 places, 210 transitions, 2749 flow [2022-12-13 11:30:08,462 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2749, PETRI_PLACES=241, PETRI_TRANSITIONS=210} [2022-12-13 11:30:08,462 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 178 predicate places. [2022-12-13 11:30:08,462 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 210 transitions, 2749 flow [2022-12-13 11:30:08,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 320.3333333333333) internal successors, (3844), 12 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:08,463 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:30:08,463 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:30:08,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-13 11:30:08,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:30:08,664 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:30:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:30:08,665 INFO L85 PathProgramCache]: Analyzing trace with hash 728680092, now seen corresponding path program 1 times [2022-12-13 11:30:08,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:30:08,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103635220] [2022-12-13 11:30:08,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:30:08,667 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 11:30:08,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:30:08,669 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:30:08,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:30:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:30:09,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 11:30:09,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:30:09,051 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 11:30:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:30:09,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:30:09,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:30:09,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103635220] [2022-12-13 11:30:09,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103635220] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:30:09,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:30:09,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:30:09,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098368729] [2022-12-13 11:30:09,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:30:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:30:09,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:30:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:30:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:30:09,260 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 852 [2022-12-13 11:30:09,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 210 transitions, 2749 flow. Second operand has 4 states, 4 states have (on average 345.25) internal successors, (1381), 4 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:09,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:30:09,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 852 [2022-12-13 11:30:09,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:30:24,986 INFO L130 PetriNetUnfolder]: 51550/75407 cut-off events. [2022-12-13 11:30:24,986 INFO L131 PetriNetUnfolder]: For 474999/486276 co-relation queries the response was YES. [2022-12-13 11:30:25,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348688 conditions, 75407 events. 51550/75407 cut-off events. For 474999/486276 co-relation queries the response was YES. Maximal size of possible extension queue 3251. Compared 599304 event pairs, 40492 based on Foata normal form. 11277/76009 useless extension candidates. Maximal degree in co-relation 348602. Up to 74928 conditions per place. [2022-12-13 11:30:26,055 INFO L137 encePairwiseOnDemand]: 849/852 looper letters, 167 selfloop transitions, 14 changer transitions 0/204 dead transitions. [2022-12-13 11:30:26,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 204 transitions, 3058 flow [2022-12-13 11:30:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:30:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:30:26,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1402 transitions. [2022-12-13 11:30:26,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4113849765258216 [2022-12-13 11:30:26,059 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1402 transitions. [2022-12-13 11:30:26,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1402 transitions. [2022-12-13 11:30:26,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:30:26,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1402 transitions. [2022-12-13 11:30:26,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 350.5) internal successors, (1402), 4 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:26,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 852.0) internal successors, (4260), 5 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:26,063 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 852.0) internal successors, (4260), 5 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:26,063 INFO L175 Difference]: Start difference. First operand has 241 places, 210 transitions, 2749 flow. Second operand 4 states and 1402 transitions. [2022-12-13 11:30:26,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 204 transitions, 3058 flow [2022-12-13 11:30:28,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 204 transitions, 2910 flow, removed 5 selfloop flow, removed 15 redundant places. [2022-12-13 11:30:28,788 INFO L231 Difference]: Finished difference. Result has 228 places, 204 transitions, 2576 flow [2022-12-13 11:30:28,788 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=2548, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2576, PETRI_PLACES=228, PETRI_TRANSITIONS=204} [2022-12-13 11:30:28,788 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 165 predicate places. [2022-12-13 11:30:28,788 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 204 transitions, 2576 flow [2022-12-13 11:30:28,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 345.25) internal successors, (1381), 4 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:28,788 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:30:28,788 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:30:28,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:30:28,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:30:28,990 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:30:28,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:30:28,991 INFO L85 PathProgramCache]: Analyzing trace with hash 728679665, now seen corresponding path program 1 times [2022-12-13 11:30:28,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:30:28,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275464436] [2022-12-13 11:30:28,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:30:28,993 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 11:30:28,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:30:28,995 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:30:28,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:30:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:30:29,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 11:30:29,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:30:29,326 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:30:29,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:30:29,426 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 11:30:29,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 11:30:29,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:30:29,505 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 11:30:29,517 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:30:29,517 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 11:30:29,565 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-13 11:30:29,565 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 16 treesize of output 18 [2022-12-13 11:30:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:30:29,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:30:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:30:32,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:30:32,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275464436] [2022-12-13 11:30:32,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275464436] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:30:32,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:30:32,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:30:32,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006922375] [2022-12-13 11:30:32,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:30:32,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:30:32,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:30:32,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:30:32,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:30:39,081 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 11:30:44,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 852 [2022-12-13 11:30:44,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 204 transitions, 2576 flow. Second operand has 12 states, 12 states have (on average 321.3333333333333) internal successors, (3856), 12 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:44,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:30:44,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 852 [2022-12-13 11:30:44,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:30:50,395 WARN L233 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 36 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:30:57,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:31:14,909 WARN L233 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 51 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:31:23,485 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 45 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:31:39,632 INFO L130 PetriNetUnfolder]: 54417/79392 cut-off events. [2022-12-13 11:31:39,632 INFO L131 PetriNetUnfolder]: For 435239/443153 co-relation queries the response was YES. [2022-12-13 11:31:40,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367094 conditions, 79392 events. 54417/79392 cut-off events. For 435239/443153 co-relation queries the response was YES. Maximal size of possible extension queue 2994. Compared 602287 event pairs, 27987 based on Foata normal form. 9224/79805 useless extension candidates. Maximal degree in co-relation 367009. Up to 24993 conditions per place. [2022-12-13 11:31:40,682 INFO L137 encePairwiseOnDemand]: 837/852 looper letters, 354 selfloop transitions, 116 changer transitions 0/486 dead transitions. [2022-12-13 11:31:40,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 486 transitions, 5135 flow [2022-12-13 11:31:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 11:31:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 11:31:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 7994 transitions. [2022-12-13 11:31:40,692 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3909428794992175 [2022-12-13 11:31:40,692 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 7994 transitions. [2022-12-13 11:31:40,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 7994 transitions. [2022-12-13 11:31:40,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:40,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 7994 transitions. [2022-12-13 11:31:40,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 333.0833333333333) internal successors, (7994), 24 states have internal predecessors, (7994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:40,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 852.0) internal successors, (21300), 25 states have internal predecessors, (21300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:40,710 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 852.0) internal successors, (21300), 25 states have internal predecessors, (21300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:40,710 INFO L175 Difference]: Start difference. First operand has 228 places, 204 transitions, 2576 flow. Second operand 24 states and 7994 transitions. [2022-12-13 11:31:40,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 486 transitions, 5135 flow [2022-12-13 11:31:46,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 486 transitions, 5116 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:31:46,907 INFO L231 Difference]: Finished difference. Result has 259 places, 225 transitions, 3117 flow [2022-12-13 11:31:46,908 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=2561, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3117, PETRI_PLACES=259, PETRI_TRANSITIONS=225} [2022-12-13 11:31:46,908 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 196 predicate places. [2022-12-13 11:31:46,908 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 225 transitions, 3117 flow [2022-12-13 11:31:46,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 321.3333333333333) internal successors, (3856), 12 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:46,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:46,908 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:31:46,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 11:31:47,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:31:47,110 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:31:47,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:47,111 INFO L85 PathProgramCache]: Analyzing trace with hash 728680091, now seen corresponding path program 1 times [2022-12-13 11:31:47,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:31:47,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335241603] [2022-12-13 11:31:47,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:47,113 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 11:31:47,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:31:47,115 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:31:47,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:31:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:47,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:31:47,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:31:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:31:47,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:31:47,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-13 11:31:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:31:47,599 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:31:47,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335241603] [2022-12-13 11:31:47,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335241603] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:31:47,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:31:47,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 11:31:47,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846099072] [2022-12-13 11:31:47,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:31:47,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:31:47,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:31:47,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:31:47,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:31:50,633 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 852 [2022-12-13 11:31:50,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 225 transitions, 3117 flow. Second operand has 10 states, 10 states have (on average 336.4) internal successors, (3364), 10 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:50,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:50,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 852 [2022-12-13 11:31:50,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:32:07,179 INFO L130 PetriNetUnfolder]: 51804/76753 cut-off events. [2022-12-13 11:32:07,179 INFO L131 PetriNetUnfolder]: For 520657/528434 co-relation queries the response was YES. [2022-12-13 11:32:07,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379946 conditions, 76753 events. 51804/76753 cut-off events. For 520657/528434 co-relation queries the response was YES. Maximal size of possible extension queue 3016. Compared 597920 event pairs, 30554 based on Foata normal form. 10371/80693 useless extension candidates. Maximal degree in co-relation 379851. Up to 52932 conditions per place. [2022-12-13 11:32:08,162 INFO L137 encePairwiseOnDemand]: 842/852 looper letters, 178 selfloop transitions, 94 changer transitions 0/288 dead transitions. [2022-12-13 11:32:08,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 288 transitions, 3918 flow [2022-12-13 11:32:08,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:32:08,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:32:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3122 transitions. [2022-12-13 11:32:08,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40714658320292124 [2022-12-13 11:32:08,167 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3122 transitions. [2022-12-13 11:32:08,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3122 transitions. [2022-12-13 11:32:08,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:32:08,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3122 transitions. [2022-12-13 11:32:08,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 346.8888888888889) internal successors, (3122), 9 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:08,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 852.0) internal successors, (8520), 10 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:08,174 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 852.0) internal successors, (8520), 10 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:08,174 INFO L175 Difference]: Start difference. First operand has 259 places, 225 transitions, 3117 flow. Second operand 9 states and 3122 transitions. [2022-12-13 11:32:08,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 288 transitions, 3918 flow [2022-12-13 11:32:16,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 288 transitions, 3732 flow, removed 6 selfloop flow, removed 16 redundant places. [2022-12-13 11:32:16,734 INFO L231 Difference]: Finished difference. Result has 252 places, 222 transitions, 3085 flow [2022-12-13 11:32:16,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=852, PETRI_DIFFERENCE_MINUEND_FLOW=2860, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3085, PETRI_PLACES=252, PETRI_TRANSITIONS=222} [2022-12-13 11:32:16,735 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 189 predicate places. [2022-12-13 11:32:16,735 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 222 transitions, 3085 flow [2022-12-13 11:32:16,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 336.4) internal successors, (3364), 10 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:16,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:32:16,735 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:32:16,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-13 11:32:16,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:32:16,937 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 11:32:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:32:16,938 INFO L85 PathProgramCache]: Analyzing trace with hash -872762588, now seen corresponding path program 3 times [2022-12-13 11:32:16,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:32:16,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518156156] [2022-12-13 11:32:16,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:32:16,940 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 11:32:16,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:32:16,942 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:32:16,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8c1b13-c2f2-444e-ab1b-6f058cbab194/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-13 11:32:17,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 11:32:17,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:32:17,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 11:32:17,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:32:17,271 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:32:17,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 11:32:17,379 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 11:32:17,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 11:32:17,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:32:17,495 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 19 treesize of output 19 [2022-12-13 11:32:17,512 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 11:32:17,513 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 11:32:17,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:32:17,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-12-13 11:32:17,636 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-13 11:32:17,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 11:32:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:32:17,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:32:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 1 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:32:25,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:32:25,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518156156] [2022-12-13 11:32:25,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518156156] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:32:25,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:32:25,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 11:32:25,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068063646] [2022-12-13 11:32:25,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:32:25,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:32:25,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:32:25,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:32:25,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=242, Unknown=2, NotChecked=0, Total=306 [2022-12-13 11:32:27,396 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 11:32:28,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:32:31,024 WARN L539 Checker$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 11:32:34,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:32:37,205 WARN L539 Checker$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 11:32:39,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:32:41,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:32:43,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:32:46,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:32:50,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:32:52,700 WARN L539 Checker$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 11:32:56,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:33:01,036 WARN L539 Checker$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 11:33:04,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:33:06,906 WARN L539 Checker$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 11:33:09,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:33:11,269 WARN L539 Checker$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 11:33:12,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:33:15,602 WARN L539 Checker$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 11:33:17,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:33:19,827 WARN L539 Checker$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 11:33:22,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:33:25,126 WARN L539 Checker$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 11:33:28,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:33:31,298 WARN L539 Checker$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 11:33:34,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:33:37,615 WARN L539 Checker$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 11:33:40,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:33:45,137 WARN L539 Checker$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 11:33:48,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:33:50,787 WARN L539 Checker$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 11:33:52,994 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 852 [2022-12-13 11:33:52,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 222 transitions, 3085 flow. Second operand has 18 states, 18 states have (on average 263.44444444444446) internal successors, (4742), 18 states have internal predecessors, (4742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:33:52,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:33:52,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 852 [2022-12-13 11:33:52,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand