./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/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_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/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_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/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 a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f --- 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 17:24:08,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:24:08,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:24:08,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:24:08,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:24:08,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:24:08,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:24:08,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:24:08,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:24:08,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:24:08,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:24:08,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:24:08,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:24:08,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:24:08,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:24:08,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:24:08,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:24:08,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:24:08,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:24:08,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:24:08,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:24:08,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:24:08,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:24:08,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:24:08,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:24:08,333 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:24:08,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:24:08,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:24:08,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:24:08,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:24:08,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:24:08,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:24:08,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:24:08,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:24:08,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:24:08,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:24:08,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:24:08,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:24:08,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:24:08,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:24:08,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:24:08,342 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 17:24:08,362 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:24:08,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:24:08,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:24:08,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:24:08,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:24:08,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:24:08,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:24:08,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:24:08,369 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:24:08,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:24:08,370 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:24:08,370 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:24:08,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:24:08,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:24:08,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:24:08,370 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:24:08,371 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:24:08,371 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:24:08,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:24:08,371 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:24:08,371 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:24:08,371 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:24:08,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:24:08,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:24:08,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:24:08,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:24:08,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:24:08,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:24:08,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:24:08,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:24:08,373 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:24:08,373 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:24:08,373 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:24:08,374 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:24:08,374 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_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f [2022-12-13 17:24:08,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:24:08,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:24:08,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:24:08,570 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:24:08,570 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:24:08,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2022-12-13 17:24:11,071 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:24:11,264 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:24:11,265 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2022-12-13 17:24:11,271 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/data/40a63bb02/06a26f87dcbd46bd925218b5f2725e47/FLAG5d5da48bb [2022-12-13 17:24:11,649 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/data/40a63bb02/06a26f87dcbd46bd925218b5f2725e47 [2022-12-13 17:24:11,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:24:11,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:24:11,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:24:11,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:24:11,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:24:11,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:24:11" (1/1) ... [2022-12-13 17:24:11,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b0b8af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:11, skipping insertion in model container [2022-12-13 17:24:11,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:24:11" (1/1) ... [2022-12-13 17:24:11,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:24:11,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:24:11,793 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:11,794 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:11,795 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:11,795 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:11,797 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:11,799 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:11,801 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:11,802 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:11,802 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:11,802 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:11,803 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:11,804 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:11,805 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:11,807 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:11,808 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:11,809 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:11,810 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:11,812 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:11,820 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_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2022-12-13 17:24:11,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:24:11,837 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 17:24:11,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@61e154aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:11, skipping insertion in model container [2022-12-13 17:24:11,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:24:11,838 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 17:24:11,840 INFO L158 Benchmark]: Toolchain (without parser) took 187.49ms. Allocated memory is still 121.6MB. Free memory was 88.7MB in the beginning and 77.5MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 17:24:11,840 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 121.6MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:24:11,840 INFO L158 Benchmark]: CACSL2BoogieTranslator took 186.02ms. Allocated memory is still 121.6MB. Free memory was 88.3MB in the beginning and 77.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 17:24:11,842 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 121.6MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 186.02ms. Allocated memory is still 121.6MB. Free memory was 88.3MB in the beginning and 77.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 143]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/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_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/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_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/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 a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f --- 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 17:24:13,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:24:13,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:24:13,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:24:13,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:24:13,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:24:13,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:24:13,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:24:13,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:24:13,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:24:13,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:24:13,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:24:13,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:24:13,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:24:13,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:24:13,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:24:13,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:24:13,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:24:13,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:24:13,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:24:13,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:24:13,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:24:13,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:24:13,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:24:13,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:24:13,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:24:13,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:24:13,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:24:13,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:24:13,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:24:13,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:24:13,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:24:13,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:24:13,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:24:13,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:24:13,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:24:13,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:24:13,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:24:13,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:24:13,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:24:13,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:24:13,335 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 17:24:13,358 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:24:13,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:24:13,359 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:24:13,359 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:24:13,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:24:13,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:24:13,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:24:13,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:24:13,361 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:24:13,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:24:13,361 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:24:13,361 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:24:13,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:24:13,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:24:13,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:24:13,362 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:24:13,362 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:24:13,362 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:24:13,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:24:13,363 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:24:13,363 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 17:24:13,363 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 17:24:13,363 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:24:13,363 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:24:13,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:24:13,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:24:13,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:24:13,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:24:13,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:24:13,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:24:13,365 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 17:24:13,365 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 17:24:13,365 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:24:13,365 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:24:13,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:24:13,365 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 17:24:13,366 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:24:13,366 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_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f [2022-12-13 17:24:13,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:24:13,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:24:13,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:24:13,621 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:24:13,621 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:24:13,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2022-12-13 17:24:16,246 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:24:16,382 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:24:16,382 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2022-12-13 17:24:16,388 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/data/338abb56d/0dae5f41bbab4354ac2556e995734920/FLAGe321df6ea [2022-12-13 17:24:16,399 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/data/338abb56d/0dae5f41bbab4354ac2556e995734920 [2022-12-13 17:24:16,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:24:16,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:24:16,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:24:16,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:24:16,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:24:16,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:24:16" (1/1) ... [2022-12-13 17:24:16,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@226b9a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:16, skipping insertion in model container [2022-12-13 17:24:16,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:24:16" (1/1) ... [2022-12-13 17:24:16,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:24:16,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:24:16,541 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,542 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,543 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,543 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,545 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,546 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,549 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,550 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,550 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,550 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,551 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,551 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,553 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,554 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,555 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,557 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,557 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,558 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,565 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_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2022-12-13 17:24:16,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:24:16,583 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 17:24:16,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:24:16,590 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,591 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,591 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,591 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,592 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,592 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,593 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,593 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,594 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,594 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,594 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,595 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,596 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,597 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,598 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,598 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,599 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,600 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,603 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_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2022-12-13 17:24:16,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:24:16,609 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:24:16,619 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,619 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,620 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,620 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,620 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,621 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,621 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,622 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,622 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,622 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,623 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,623 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,624 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,625 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,626 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,627 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,627 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:24:16,628 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:24:16,631 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_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2022-12-13 17:24:16,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:24:16,646 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:24:16,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:16 WrapperNode [2022-12-13 17:24:16,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:24:16,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:24:16,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:24:16,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:24:16,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:16" (1/1) ... [2022-12-13 17:24:16,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:16" (1/1) ... [2022-12-13 17:24:16,679 INFO L138 Inliner]: procedures = 29, calls = 75, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 172 [2022-12-13 17:24:16,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:24:16,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:24:16,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:24:16,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:24:16,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:16" (1/1) ... [2022-12-13 17:24:16,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:16" (1/1) ... [2022-12-13 17:24:16,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:16" (1/1) ... [2022-12-13 17:24:16,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:16" (1/1) ... [2022-12-13 17:24:16,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:16" (1/1) ... [2022-12-13 17:24:16,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:16" (1/1) ... [2022-12-13 17:24:16,709 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:16" (1/1) ... [2022-12-13 17:24:16,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:16" (1/1) ... [2022-12-13 17:24:16,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:24:16,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:24:16,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:24:16,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:24:16,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:16" (1/1) ... [2022-12-13 17:24:16,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:24:16,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:24:16,747 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:24:16,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:24:16,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:24:16,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 17:24:16,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:24:16,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 17:24:16,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 17:24:16,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 17:24:16,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 17:24:16,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 17:24:16,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 17:24:16,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 17:24:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 17:24:16,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 17:24:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-12-13 17:24:16,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-12-13 17:24:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 17:24:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 17:24:16,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 17:24:16,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:24:16,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:24:16,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:24:16,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 17:24:16,790 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 17:24:16,899 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:24:16,901 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:24:17,501 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:24:17,650 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:24:17,650 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-13 17:24:17,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:24:17 BoogieIcfgContainer [2022-12-13 17:24:17,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:24:17,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:24:17,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:24:17,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:24:17,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:24:16" (1/3) ... [2022-12-13 17:24:17,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab44121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:24:17, skipping insertion in model container [2022-12-13 17:24:17,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:24:16" (2/3) ... [2022-12-13 17:24:17,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab44121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:24:17, skipping insertion in model container [2022-12-13 17:24:17,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:24:17" (3/3) ... [2022-12-13 17:24:17,661 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc-dec.wvr.c [2022-12-13 17:24:17,679 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:24:17,679 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2022-12-13 17:24:17,679 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:24:17,769 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-12-13 17:24:17,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 245 places, 243 transitions, 526 flow [2022-12-13 17:24:17,889 INFO L130 PetriNetUnfolder]: 14/238 cut-off events. [2022-12-13 17:24:17,889 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 17:24:17,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 238 events. 14/238 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 350 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 188. Up to 2 conditions per place. [2022-12-13 17:24:17,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 243 transitions, 526 flow [2022-12-13 17:24:17,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 233 transitions, 496 flow [2022-12-13 17:24:17,913 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:24:17,935 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 235 places, 233 transitions, 496 flow [2022-12-13 17:24:17,938 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 235 places, 233 transitions, 496 flow [2022-12-13 17:24:17,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 233 transitions, 496 flow [2022-12-13 17:24:17,987 INFO L130 PetriNetUnfolder]: 14/233 cut-off events. [2022-12-13 17:24:17,987 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 17:24:17,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 233 events. 14/233 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 346 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 188. Up to 2 conditions per place. [2022-12-13 17:24:17,994 INFO L119 LiptonReduction]: Number of co-enabled transitions 8466 [2022-12-13 17:24:58,205 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 147 DAG size of output: 144 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 17:25:00,841 INFO L134 LiptonReduction]: Checked pairs total: 14566 [2022-12-13 17:25:00,841 INFO L136 LiptonReduction]: Total number of compositions: 222 [2022-12-13 17:25:00,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:25:00,854 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;@4756b71e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:25:00,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2022-12-13 17:25:00,856 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 17:25:00,856 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:25:00,857 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:25:00,857 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:25:00,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:25:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:00,861 INFO L85 PathProgramCache]: Analyzing trace with hash 32264, now seen corresponding path program 1 times [2022-12-13 17:25:00,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:25:00,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915586237] [2022-12-13 17:25:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:00,872 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 17:25:00,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:25:00,874 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:00,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:00,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:25:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:01,193 INFO L321 Elim1Store]: treesize reduction 240, result has 26.4 percent of original size [2022-12-13 17:25:01,193 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 5 case distinctions, treesize of input 21 treesize of output 93 [2022-12-13 17:25:01,230 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 17:25:01,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:25:01,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:25:01,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915586237] [2022-12-13 17:25:01,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915586237] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:25:01,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:25:01,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:25:01,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614038395] [2022-12-13 17:25:01,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:25:01,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:25:01,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:25:01,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:25:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:25:01,409 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 465 [2022-12-13 17:25:01,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:01,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:25:01,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 465 [2022-12-13 17:25:01,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:25:07,842 INFO L130 PetriNetUnfolder]: 65876/79027 cut-off events. [2022-12-13 17:25:07,842 INFO L131 PetriNetUnfolder]: For 907/907 co-relation queries the response was YES. [2022-12-13 17:25:07,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160500 conditions, 79027 events. 65876/79027 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 3870. Compared 375174 event pairs, 42198 based on Foata normal form. 0/31000 useless extension candidates. Maximal degree in co-relation 144278. Up to 78857 conditions per place. [2022-12-13 17:25:08,338 INFO L137 encePairwiseOnDemand]: 450/465 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2022-12-13 17:25:08,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 71 transitions, 302 flow [2022-12-13 17:25:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:25:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:25:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 667 transitions. [2022-12-13 17:25:08,351 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47813620071684587 [2022-12-13 17:25:08,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 667 transitions. [2022-12-13 17:25:08,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 667 transitions. [2022-12-13 17:25:08,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:25:08,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 667 transitions. [2022-12-13 17:25:08,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:08,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:08,370 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:08,371 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 200 flow. Second operand 3 states and 667 transitions. [2022-12-13 17:25:08,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 71 transitions, 302 flow [2022-12-13 17:25:08,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 282 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-12-13 17:25:08,544 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 154 flow [2022-12-13 17:25:08,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=72, 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=154, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2022-12-13 17:25:08,547 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -22 predicate places. [2022-12-13 17:25:08,548 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 154 flow [2022-12-13 17:25:08,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:08,548 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:25:08,548 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:25:08,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:08,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:08,750 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:25:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash 32372, now seen corresponding path program 1 times [2022-12-13 17:25:08,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:25:08,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100475443] [2022-12-13 17:25:08,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:08,755 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 17:25:08,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:25:08,758 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:08,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:08,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:25:08,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:08,889 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 17:25:08,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:25:08,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:25:08,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100475443] [2022-12-13 17:25:08,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100475443] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:25:08,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:25:08,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:25:08,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220771869] [2022-12-13 17:25:08,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:25:08,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:25:08,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:25:08,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:25:08,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:25:08,925 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 465 [2022-12-13 17:25:08,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:08,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:25:08,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 465 [2022-12-13 17:25:08,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:25:14,542 INFO L130 PetriNetUnfolder]: 65876/79029 cut-off events. [2022-12-13 17:25:14,542 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-12-13 17:25:14,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159015 conditions, 79029 events. 65876/79029 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 3870. Compared 375861 event pairs, 42198 based on Foata normal form. 0/31001 useless extension candidates. Maximal degree in co-relation 159009. Up to 78858 conditions per place. [2022-12-13 17:25:14,845 INFO L137 encePairwiseOnDemand]: 460/465 looper letters, 65 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2022-12-13 17:25:14,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 292 flow [2022-12-13 17:25:14,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:25:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:25:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2022-12-13 17:25:14,850 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4824372759856631 [2022-12-13 17:25:14,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2022-12-13 17:25:14,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2022-12-13 17:25:14,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:25:14,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2022-12-13 17:25:14,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:14,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:14,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:14,861 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 154 flow. Second operand 3 states and 673 transitions. [2022-12-13 17:25:14,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 292 flow [2022-12-13 17:25:14,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:25:14,865 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 169 flow [2022-12-13 17:25:14,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2022-12-13 17:25:14,866 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -20 predicate places. [2022-12-13 17:25:14,866 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 169 flow [2022-12-13 17:25:14,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:14,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:25:14,868 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:25:14,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:15,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:15,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:25:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:15,072 INFO L85 PathProgramCache]: Analyzing trace with hash 32265, now seen corresponding path program 1 times [2022-12-13 17:25:15,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:25:15,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017904989] [2022-12-13 17:25:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:15,075 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 17:25:15,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:25:15,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:15,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:15,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 17:25:15,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:15,478 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-12-13 17:25:15,478 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-12-13 17:25:15,542 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 17:25:15,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:25:15,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:25:15,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017904989] [2022-12-13 17:25:15,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017904989] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:25:15,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:25:15,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:25:15,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598422405] [2022-12-13 17:25:15,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:25:15,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:25:15,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:25:15,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:25:15,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:25:15,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 465 [2022-12-13 17:25:15,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:15,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:25:15,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 465 [2022-12-13 17:25:15,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:25:21,321 INFO L130 PetriNetUnfolder]: 65876/79028 cut-off events. [2022-12-13 17:25:21,321 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-12-13 17:25:21,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159021 conditions, 79028 events. 65876/79028 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 3870. Compared 375612 event pairs, 42198 based on Foata normal form. 1/31003 useless extension candidates. Maximal degree in co-relation 159013. Up to 78858 conditions per place. [2022-12-13 17:25:21,808 INFO L137 encePairwiseOnDemand]: 462/465 looper letters, 64 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2022-12-13 17:25:21,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 301 flow [2022-12-13 17:25:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:25:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:25:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 667 transitions. [2022-12-13 17:25:21,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47813620071684587 [2022-12-13 17:25:21,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 667 transitions. [2022-12-13 17:25:21,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 667 transitions. [2022-12-13 17:25:21,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:25:21,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 667 transitions. [2022-12-13 17:25:21,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:21,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:21,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:21,824 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 169 flow. Second operand 3 states and 667 transitions. [2022-12-13 17:25:21,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 301 flow [2022-12-13 17:25:21,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 297 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 17:25:21,828 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 173 flow [2022-12-13 17:25:21,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2022-12-13 17:25:21,829 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -18 predicate places. [2022-12-13 17:25:21,829 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 173 flow [2022-12-13 17:25:21,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:21,830 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:25:21,830 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 17:25:21,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:22,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:22,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:25:22,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:22,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1004053, now seen corresponding path program 1 times [2022-12-13 17:25:22,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:25:22,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057626604] [2022-12-13 17:25:22,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:22,035 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 17:25:22,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:25:22,038 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:22,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:22,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 17:25:22,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:22,413 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-12-13 17:25:22,414 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-12-13 17:25:22,480 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 17:25:22,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:25:22,671 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 17:25:22,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:25:22,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057626604] [2022-12-13 17:25:22,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057626604] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:25:22,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:25:22,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 17:25:22,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008575121] [2022-12-13 17:25:22,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:25:22,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:25:22,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:25:22,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:25:22,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:25:24,111 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 465 [2022-12-13 17:25:24,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:24,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:25:24,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 465 [2022-12-13 17:25:24,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:25:34,664 INFO L130 PetriNetUnfolder]: 131325/157629 cut-off events. [2022-12-13 17:25:34,665 INFO L131 PetriNetUnfolder]: For 300/300 co-relation queries the response was YES. [2022-12-13 17:25:34,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317155 conditions, 157629 events. 131325/157629 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 7415. Compared 798745 event pairs, 84228 based on Foata normal form. 3/61970 useless extension candidates. Maximal degree in co-relation 317145. Up to 78855 conditions per place. [2022-12-13 17:25:35,376 INFO L137 encePairwiseOnDemand]: 459/465 looper letters, 126 selfloop transitions, 11 changer transitions 0/143 dead transitions. [2022-12-13 17:25:35,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 143 transitions, 623 flow [2022-12-13 17:25:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:25:35,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:25:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1286 transitions. [2022-12-13 17:25:35,380 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46093189964157705 [2022-12-13 17:25:35,380 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1286 transitions. [2022-12-13 17:25:35,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1286 transitions. [2022-12-13 17:25:35,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:25:35,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1286 transitions. [2022-12-13 17:25:35,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:35,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 465.0) internal successors, (3255), 7 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:35,386 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 465.0) internal successors, (3255), 7 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:35,387 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 173 flow. Second operand 6 states and 1286 transitions. [2022-12-13 17:25:35,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 143 transitions, 623 flow [2022-12-13 17:25:35,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 143 transitions, 619 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:25:35,389 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 267 flow [2022-12-13 17:25:35,389 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=85, PETRI_TRANSITIONS=81} [2022-12-13 17:25:35,390 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -11 predicate places. [2022-12-13 17:25:35,390 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 267 flow [2022-12-13 17:25:35,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:35,390 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:25:35,391 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 17:25:35,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:35,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:35,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:25:35,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:35,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1004160, now seen corresponding path program 1 times [2022-12-13 17:25:35,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:25:35,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496987920] [2022-12-13 17:25:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:35,592 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 17:25:35,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:25:35,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:35,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 17:25:35,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:35,779 INFO L321 Elim1Store]: treesize reduction 313, result has 12.1 percent of original size [2022-12-13 17:25:35,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 61 treesize of output 83 [2022-12-13 17:25:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:25:35,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:25:35,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:25:35,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496987920] [2022-12-13 17:25:35,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496987920] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:25:35,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:25:35,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:25:35,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090518402] [2022-12-13 17:25:35,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:25:35,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:25:35,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:25:35,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:25:35,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:25:36,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 465 [2022-12-13 17:25:36,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:36,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:25:36,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 465 [2022-12-13 17:25:36,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:25:44,559 INFO L130 PetriNetUnfolder]: 111235/133937 cut-off events. [2022-12-13 17:25:44,559 INFO L131 PetriNetUnfolder]: For 308/308 co-relation queries the response was YES. [2022-12-13 17:25:44,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269833 conditions, 133937 events. 111235/133937 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 6114. Compared 676351 event pairs, 70836 based on Foata normal form. 0/53727 useless extension candidates. Maximal degree in co-relation 269819. Up to 133597 conditions per place. [2022-12-13 17:25:45,196 INFO L137 encePairwiseOnDemand]: 462/465 looper letters, 70 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2022-12-13 17:25:45,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 383 flow [2022-12-13 17:25:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:25:45,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:25:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2022-12-13 17:25:45,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46810035842293907 [2022-12-13 17:25:45,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2022-12-13 17:25:45,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2022-12-13 17:25:45,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:25:45,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2022-12-13 17:25:45,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:45,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:45,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:45,206 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 267 flow. Second operand 3 states and 653 transitions. [2022-12-13 17:25:45,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 383 flow [2022-12-13 17:25:45,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 77 transitions, 367 flow, removed 7 selfloop flow, removed 1 redundant places. [2022-12-13 17:25:45,210 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 227 flow [2022-12-13 17:25:45,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2022-12-13 17:25:45,211 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -12 predicate places. [2022-12-13 17:25:45,211 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 227 flow [2022-12-13 17:25:45,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:45,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:25:45,212 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 17:25:45,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 17:25:45,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:45,413 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:25:45,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:45,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1004159, now seen corresponding path program 1 times [2022-12-13 17:25:45,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:25:45,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833821970] [2022-12-13 17:25:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:45,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:25:45,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:25:45,419 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:45,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:45,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 17:25:45,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:45,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:25:45,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:25:45,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:25:45,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:25:45,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:25:45,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:25:45,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:25:45,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:25:45,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:25:45,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:25:45,792 INFO L321 Elim1Store]: treesize reduction 60, result has 43.4 percent of original size [2022-12-13 17:25:45,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 53 [2022-12-13 17:25:45,837 INFO L321 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2022-12-13 17:25:45,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 53 [2022-12-13 17:25:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:25:45,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:25:45,925 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:25:45,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833821970] [2022-12-13 17:25:45,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833821970] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:25:45,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:25:45,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:25:45,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297072322] [2022-12-13 17:25:45,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:25:45,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:25:45,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:25:45,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:25:45,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:25:46,122 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 465 [2022-12-13 17:25:46,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:46,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:25:46,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 465 [2022-12-13 17:25:46,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:25:53,062 INFO L130 PetriNetUnfolder]: 90713/109813 cut-off events. [2022-12-13 17:25:53,062 INFO L131 PetriNetUnfolder]: For 312/312 co-relation queries the response was YES. [2022-12-13 17:25:53,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221569 conditions, 109813 events. 90713/109813 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 4848. Compared 551357 event pairs, 57276 based on Foata normal form. 0/45447 useless extension candidates. Maximal degree in co-relation 221554. Up to 109473 conditions per place. [2022-12-13 17:25:53,641 INFO L137 encePairwiseOnDemand]: 462/465 looper letters, 66 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2022-12-13 17:25:53,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 339 flow [2022-12-13 17:25:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:25:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:25:53,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 660 transitions. [2022-12-13 17:25:53,644 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2022-12-13 17:25:53,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 660 transitions. [2022-12-13 17:25:53,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 660 transitions. [2022-12-13 17:25:53,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:25:53,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 660 transitions. [2022-12-13 17:25:53,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:53,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:53,647 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:53,647 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 227 flow. Second operand 3 states and 660 transitions. [2022-12-13 17:25:53,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 339 flow [2022-12-13 17:25:53,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 73 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:25:53,649 INFO L231 Difference]: Finished difference. Result has 83 places, 73 transitions, 206 flow [2022-12-13 17:25:53,650 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=83, PETRI_TRANSITIONS=73} [2022-12-13 17:25:53,650 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -13 predicate places. [2022-12-13 17:25:53,650 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 73 transitions, 206 flow [2022-12-13 17:25:53,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:53,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:25:53,651 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:25:53,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:53,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:53,852 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:25:53,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:53,853 INFO L85 PathProgramCache]: Analyzing trace with hash 965022553, now seen corresponding path program 1 times [2022-12-13 17:25:53,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:25:53,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100088252] [2022-12-13 17:25:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:53,855 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 17:25:53,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:25:53,859 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:53,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:53,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 17:25:53,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:54,136 INFO L321 Elim1Store]: treesize reduction 240, result has 26.4 percent of original size [2022-12-13 17:25:54,136 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 5 case distinctions, treesize of input 21 treesize of output 93 [2022-12-13 17:25:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:25:54,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:25:54,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:25:54,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100088252] [2022-12-13 17:25:54,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100088252] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:25:54,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:25:54,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:25:54,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14536131] [2022-12-13 17:25:54,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:25:54,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:25:54,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:25:54,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:25:54,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:25:54,449 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 465 [2022-12-13 17:25:54,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 73 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 189.25) internal successors, (757), 4 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:54,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:25:54,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 465 [2022-12-13 17:25:54,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:25:58,194 INFO L130 PetriNetUnfolder]: 40607/49683 cut-off events. [2022-12-13 17:25:58,194 INFO L131 PetriNetUnfolder]: For 172/172 co-relation queries the response was YES. [2022-12-13 17:25:58,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100278 conditions, 49683 events. 40607/49683 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 2106. Compared 235476 event pairs, 25264 based on Foata normal form. 0/24433 useless extension candidates. Maximal degree in co-relation 100262. Up to 49488 conditions per place. [2022-12-13 17:25:58,398 INFO L137 encePairwiseOnDemand]: 457/465 looper letters, 59 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2022-12-13 17:25:58,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 67 transitions, 320 flow [2022-12-13 17:25:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:25:58,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:25:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 815 transitions. [2022-12-13 17:25:58,401 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4381720430107527 [2022-12-13 17:25:58,401 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 815 transitions. [2022-12-13 17:25:58,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 815 transitions. [2022-12-13 17:25:58,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:25:58,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 815 transitions. [2022-12-13 17:25:58,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.75) internal successors, (815), 4 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:58,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 465.0) internal successors, (2325), 5 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:58,408 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 465.0) internal successors, (2325), 5 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:58,408 INFO L175 Difference]: Start difference. First operand has 83 places, 73 transitions, 206 flow. Second operand 4 states and 815 transitions. [2022-12-13 17:25:58,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 67 transitions, 320 flow [2022-12-13 17:25:58,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 67 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:25:58,410 INFO L231 Difference]: Finished difference. Result has 79 places, 67 transitions, 201 flow [2022-12-13 17:25:58,411 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=79, PETRI_TRANSITIONS=67} [2022-12-13 17:25:58,411 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -17 predicate places. [2022-12-13 17:25:58,411 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 67 transitions, 201 flow [2022-12-13 17:25:58,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 189.25) internal successors, (757), 4 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:25:58,412 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:25:58,412 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:25:58,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 17:25:58,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:58,614 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:25:58,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:58,615 INFO L85 PathProgramCache]: Analyzing trace with hash 965022554, now seen corresponding path program 1 times [2022-12-13 17:25:58,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:25:58,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406930190] [2022-12-13 17:25:58,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:58,616 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 17:25:58,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:25:58,619 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:58,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:25:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:58,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:25:58,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:58,811 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 17:25:58,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:25:58,889 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 17:25:58,938 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 17:25:58,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:25:58,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406930190] [2022-12-13 17:25:58,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406930190] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:25:58,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:25:58,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 17:25:58,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465565166] [2022-12-13 17:25:58,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:25:58,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:25:58,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:25:58,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:25:58,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:26:00,396 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 465 [2022-12-13 17:26:00,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 67 transitions, 201 flow. Second operand has 8 states, 8 states have (on average 191.25) internal successors, (1530), 8 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:00,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:26:00,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 465 [2022-12-13 17:26:00,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:26:04,716 INFO L130 PetriNetUnfolder]: 40357/49425 cut-off events. [2022-12-13 17:26:04,716 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2022-12-13 17:26:04,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99750 conditions, 49425 events. 40357/49425 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 2055. Compared 233775 event pairs, 25149 based on Foata normal form. 0/24400 useless extension candidates. Maximal degree in co-relation 99733. Up to 24743 conditions per place. [2022-12-13 17:26:04,942 INFO L137 encePairwiseOnDemand]: 460/465 looper letters, 110 selfloop transitions, 7 changer transitions 0/119 dead transitions. [2022-12-13 17:26:04,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 119 transitions, 557 flow [2022-12-13 17:26:04,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:26:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:26:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1447 transitions. [2022-12-13 17:26:04,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4445468509984639 [2022-12-13 17:26:04,946 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1447 transitions. [2022-12-13 17:26:04,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1447 transitions. [2022-12-13 17:26:04,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:26:04,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1447 transitions. [2022-12-13 17:26:04,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 206.71428571428572) internal successors, (1447), 7 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:04,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 465.0) internal successors, (3720), 8 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:04,951 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 465.0) internal successors, (3720), 8 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:04,952 INFO L175 Difference]: Start difference. First operand has 79 places, 67 transitions, 201 flow. Second operand 7 states and 1447 transitions. [2022-12-13 17:26:04,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 119 transitions, 557 flow [2022-12-13 17:26:04,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 119 transitions, 551 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:26:04,954 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 215 flow [2022-12-13 17:26:04,954 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=215, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2022-12-13 17:26:04,954 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -15 predicate places. [2022-12-13 17:26:04,954 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 215 flow [2022-12-13 17:26:04,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 191.25) internal successors, (1530), 8 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:04,955 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:26:04,955 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:26:04,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 17:26:05,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:05,156 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:26:05,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:26:05,157 INFO L85 PathProgramCache]: Analyzing trace with hash 965022820, now seen corresponding path program 1 times [2022-12-13 17:26:05,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:26:05,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474892771] [2022-12-13 17:26:05,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:26:05,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:26:05,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:26:05,161 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:05,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:26:05,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:26:05,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:26:05,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:26:05,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:26:05,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:26:05,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:26:05,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:26:05,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:26:05,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:26:05,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:26:05,663 INFO L321 Elim1Store]: treesize reduction 86, result has 37.7 percent of original size [2022-12-13 17:26:05,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 59 [2022-12-13 17:26:05,741 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-12-13 17:26:05,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 249 treesize of output 246 [2022-12-13 17:26:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:26:05,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:26:05,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:26:05,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474892771] [2022-12-13 17:26:05,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474892771] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:26:05,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:26:05,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:26:05,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686829856] [2022-12-13 17:26:05,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:26:05,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:26:05,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:26:05,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:26:05,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:26:06,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 465 [2022-12-13 17:26:06,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:06,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:26:06,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 465 [2022-12-13 17:26:06,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:26:09,537 INFO L130 PetriNetUnfolder]: 39157/47895 cut-off events. [2022-12-13 17:26:09,537 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-12-13 17:26:09,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96721 conditions, 47895 events. 39157/47895 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 2097. Compared 226370 event pairs, 24360 based on Foata normal form. 0/23747 useless extension candidates. Maximal degree in co-relation 96704. Up to 47715 conditions per place. [2022-12-13 17:26:09,766 INFO L137 encePairwiseOnDemand]: 462/465 looper letters, 61 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2022-12-13 17:26:09,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 64 transitions, 335 flow [2022-12-13 17:26:09,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:26:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:26:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2022-12-13 17:26:09,768 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46881720430107526 [2022-12-13 17:26:09,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2022-12-13 17:26:09,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2022-12-13 17:26:09,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:26:09,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2022-12-13 17:26:09,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:09,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:09,771 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:09,771 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 215 flow. Second operand 3 states and 654 transitions. [2022-12-13 17:26:09,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 64 transitions, 335 flow [2022-12-13 17:26:09,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 64 transitions, 320 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 17:26:09,773 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 198 flow [2022-12-13 17:26:09,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2022-12-13 17:26:09,773 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -18 predicate places. [2022-12-13 17:26:09,773 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 198 flow [2022-12-13 17:26:09,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:09,774 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:26:09,774 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:26:09,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:09,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:09,975 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:26:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:26:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash 965022819, now seen corresponding path program 1 times [2022-12-13 17:26:09,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:26:09,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979004697] [2022-12-13 17:26:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:26:09,978 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 17:26:09,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:26:09,981 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:09,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:26:10,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 17:26:10,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:26:10,268 INFO L321 Elim1Store]: treesize reduction 320, result has 10.1 percent of original size [2022-12-13 17:26:10,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 73 treesize of output 88 [2022-12-13 17:26:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:26:10,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:26:10,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:26:10,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979004697] [2022-12-13 17:26:10,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979004697] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:26:10,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:26:10,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:26:10,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19266789] [2022-12-13 17:26:10,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:26:10,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:26:10,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:26:10,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:26:10,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:26:10,992 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 465 [2022-12-13 17:26:10,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:10,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:26:10,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 465 [2022-12-13 17:26:10,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:26:14,433 INFO L130 PetriNetUnfolder]: 37707/46115 cut-off events. [2022-12-13 17:26:14,433 INFO L131 PetriNetUnfolder]: For 178/178 co-relation queries the response was YES. [2022-12-13 17:26:14,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93155 conditions, 46115 events. 37707/46115 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 2018. Compared 216900 event pairs, 23456 based on Foata normal form. 0/23069 useless extension candidates. Maximal degree in co-relation 93138. Up to 45935 conditions per place. [2022-12-13 17:26:14,695 INFO L137 encePairwiseOnDemand]: 462/465 looper letters, 59 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2022-12-13 17:26:14,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 62 transitions, 314 flow [2022-12-13 17:26:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:26:14,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:26:14,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 643 transitions. [2022-12-13 17:26:14,698 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46093189964157705 [2022-12-13 17:26:14,698 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 643 transitions. [2022-12-13 17:26:14,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 643 transitions. [2022-12-13 17:26:14,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:26:14,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 643 transitions. [2022-12-13 17:26:14,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:14,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:14,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:14,701 INFO L175 Difference]: Start difference. First operand has 78 places, 64 transitions, 198 flow. Second operand 3 states and 643 transitions. [2022-12-13 17:26:14,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 62 transitions, 314 flow [2022-12-13 17:26:14,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 62 transitions, 313 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:26:14,703 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 195 flow [2022-12-13 17:26:14,703 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2022-12-13 17:26:14,703 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -19 predicate places. [2022-12-13 17:26:14,703 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 195 flow [2022-12-13 17:26:14,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:14,704 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:26:14,704 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 17:26:14,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:14,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:14,905 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:26:14,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:26:14,906 INFO L85 PathProgramCache]: Analyzing trace with hash -149217015, now seen corresponding path program 2 times [2022-12-13 17:26:14,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:26:14,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307911396] [2022-12-13 17:26:14,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:26:14,907 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 17:26:14,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:26:14,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:14,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:15,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:26:15,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:26:15,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 17:26:15,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:26:15,271 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-12-13 17:26:15,271 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-12-13 17:26:15,410 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 17:26:15,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:26:15,902 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 17:26:15,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:26:15,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307911396] [2022-12-13 17:26:15,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307911396] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:26:15,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:26:15,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 17:26:15,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922069304] [2022-12-13 17:26:15,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:26:15,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:26:15,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:26:15,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:26:15,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:26:20,974 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 465 [2022-12-13 17:26:20,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 195 flow. Second operand has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:20,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:26:20,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 465 [2022-12-13 17:26:20,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:26:40,896 INFO L130 PetriNetUnfolder]: 167670/205491 cut-off events. [2022-12-13 17:26:40,896 INFO L131 PetriNetUnfolder]: For 780/780 co-relation queries the response was YES. [2022-12-13 17:26:41,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414825 conditions, 205491 events. 167670/205491 cut-off events. For 780/780 co-relation queries the response was YES. Maximal size of possible extension queue 6607. Compared 1104513 event pairs, 104632 based on Foata normal form. 6/103590 useless extension candidates. Maximal degree in co-relation 414807. Up to 22964 conditions per place. [2022-12-13 17:26:41,991 INFO L137 encePairwiseOnDemand]: 461/465 looper letters, 452 selfloop transitions, 12 changer transitions 0/466 dead transitions. [2022-12-13 17:26:41,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 466 transitions, 2065 flow [2022-12-13 17:26:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:26:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 17:26:41,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2774 transitions. [2022-12-13 17:26:41,997 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4971326164874552 [2022-12-13 17:26:41,997 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2774 transitions. [2022-12-13 17:26:41,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2774 transitions. [2022-12-13 17:26:41,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:26:41,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2774 transitions. [2022-12-13 17:26:42,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 231.16666666666666) internal successors, (2774), 12 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:42,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 465.0) internal successors, (6045), 13 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:42,103 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 465.0) internal successors, (6045), 13 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:42,103 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 195 flow. Second operand 12 states and 2774 transitions. [2022-12-13 17:26:42,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 466 transitions, 2065 flow [2022-12-13 17:26:42,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 466 transitions, 2064 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:26:42,107 INFO L231 Difference]: Finished difference. Result has 94 places, 69 transitions, 283 flow [2022-12-13 17:26:42,107 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=283, PETRI_PLACES=94, PETRI_TRANSITIONS=69} [2022-12-13 17:26:42,107 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -2 predicate places. [2022-12-13 17:26:42,107 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 69 transitions, 283 flow [2022-12-13 17:26:42,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:42,108 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:26:42,108 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:26:42,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:42,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:42,310 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:26:42,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:26:42,311 INFO L85 PathProgramCache]: Analyzing trace with hash -326234263, now seen corresponding path program 1 times [2022-12-13 17:26:42,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:26:42,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134936174] [2022-12-13 17:26:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:26:42,314 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 17:26:42,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:26:42,317 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:42,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:26:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:26:42,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:26:42,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:26:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:26:42,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:26:42,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:26:42,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134936174] [2022-12-13 17:26:42,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134936174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:26:42,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:26:42,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:26:42,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085926617] [2022-12-13 17:26:42,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:26:42,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:26:42,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:26:42,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:26:42,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:26:42,959 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 465 [2022-12-13 17:26:42,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 69 transitions, 283 flow. Second operand has 6 states, 6 states have (on average 196.16666666666666) internal successors, (1177), 6 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:42,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:26:42,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 465 [2022-12-13 17:26:42,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:08,367 INFO L130 PetriNetUnfolder]: 259265/315536 cut-off events. [2022-12-13 17:27:08,367 INFO L131 PetriNetUnfolder]: For 1473/1473 co-relation queries the response was YES. [2022-12-13 17:27:09,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 637926 conditions, 315536 events. 259265/315536 cut-off events. For 1473/1473 co-relation queries the response was YES. Maximal size of possible extension queue 9808. Compared 1699982 event pairs, 67473 based on Foata normal form. 0/156623 useless extension candidates. Maximal degree in co-relation 637900. Up to 214956 conditions per place. [2022-12-13 17:27:10,345 INFO L137 encePairwiseOnDemand]: 457/465 looper letters, 129 selfloop transitions, 7 changer transitions 0/138 dead transitions. [2022-12-13 17:27:10,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 138 transitions, 706 flow [2022-12-13 17:27:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:27:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:27:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1098 transitions. [2022-12-13 17:27:10,348 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.472258064516129 [2022-12-13 17:27:10,348 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1098 transitions. [2022-12-13 17:27:10,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1098 transitions. [2022-12-13 17:27:10,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:10,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1098 transitions. [2022-12-13 17:27:10,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.6) internal successors, (1098), 5 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:10,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 465.0) internal successors, (2790), 6 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:10,354 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 465.0) internal successors, (2790), 6 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:10,354 INFO L175 Difference]: Start difference. First operand has 94 places, 69 transitions, 283 flow. Second operand 5 states and 1098 transitions. [2022-12-13 17:27:10,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 138 transitions, 706 flow [2022-12-13 17:27:10,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 138 transitions, 693 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-12-13 17:27:10,358 INFO L231 Difference]: Finished difference. Result has 96 places, 74 transitions, 313 flow [2022-12-13 17:27:10,358 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=313, PETRI_PLACES=96, PETRI_TRANSITIONS=74} [2022-12-13 17:27:10,358 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, 0 predicate places. [2022-12-13 17:27:10,358 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 74 transitions, 313 flow [2022-12-13 17:27:10,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.16666666666666) internal successors, (1177), 6 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:10,359 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:10,359 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:10,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 17:27:10,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:27:10,561 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:27:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:10,562 INFO L85 PathProgramCache]: Analyzing trace with hash -325983540, now seen corresponding path program 1 times [2022-12-13 17:27:10,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:27:10,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593643967] [2022-12-13 17:27:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:10,564 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 17:27:10,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:27:10,567 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:27:10,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:27:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:10,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 17:27:10,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:10,781 INFO L321 Elim1Store]: treesize reduction 296, result has 11.9 percent of original size [2022-12-13 17:27:10,781 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 8 case distinctions, treesize of input 60 treesize of output 81 [2022-12-13 17:27:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:27:10,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:27:10,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:27:10,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593643967] [2022-12-13 17:27:10,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593643967] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:10,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:10,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:27:10,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721052189] [2022-12-13 17:27:10,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:10,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:27:10,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:27:10,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:27:10,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:27:11,189 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 465 [2022-12-13 17:27:11,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 74 transitions, 313 flow. Second operand has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:11,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:11,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 465 [2022-12-13 17:27:11,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:38,006 INFO L130 PetriNetUnfolder]: 247799/303179 cut-off events. [2022-12-13 17:27:38,006 INFO L131 PetriNetUnfolder]: For 88638/88638 co-relation queries the response was YES. [2022-12-13 17:27:39,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713967 conditions, 303179 events. 247799/303179 cut-off events. For 88638/88638 co-relation queries the response was YES. Maximal size of possible extension queue 9483. Compared 1690139 event pairs, 149958 based on Foata normal form. 0/213665 useless extension candidates. Maximal degree in co-relation 713938. Up to 302036 conditions per place. [2022-12-13 17:27:40,022 INFO L137 encePairwiseOnDemand]: 462/465 looper letters, 69 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2022-12-13 17:27:40,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 72 transitions, 449 flow [2022-12-13 17:27:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:27:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:27:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2022-12-13 17:27:40,025 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45949820788530465 [2022-12-13 17:27:40,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2022-12-13 17:27:40,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2022-12-13 17:27:40,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:40,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2022-12-13 17:27:40,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:40,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:40,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:40,029 INFO L175 Difference]: Start difference. First operand has 96 places, 74 transitions, 313 flow. Second operand 3 states and 641 transitions. [2022-12-13 17:27:40,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 72 transitions, 449 flow [2022-12-13 17:27:40,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 72 transitions, 442 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:27:40,056 INFO L231 Difference]: Finished difference. Result has 94 places, 72 transitions, 304 flow [2022-12-13 17:27:40,057 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=94, PETRI_TRANSITIONS=72} [2022-12-13 17:27:40,057 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -2 predicate places. [2022-12-13 17:27:40,057 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 72 transitions, 304 flow [2022-12-13 17:27:40,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:40,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:40,057 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:40,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 17:27:40,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:27:40,259 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:27:40,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:40,260 INFO L85 PathProgramCache]: Analyzing trace with hash -325983538, now seen corresponding path program 1 times [2022-12-13 17:27:40,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:27:40,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760000462] [2022-12-13 17:27:40,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:40,262 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 17:27:40,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:27:40,265 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:27:40,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:27:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:40,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:27:40,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:40,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:27:40,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:27:40,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:27:40,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:27:40,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:27:40,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:27:40,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:27:40,621 INFO L321 Elim1Store]: treesize reduction 102, result has 35.0 percent of original size [2022-12-13 17:27:40,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2022-12-13 17:27:40,652 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 17:27:40,652 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 39 treesize of output 35 [2022-12-13 17:27:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:27:40,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:27:40,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:27:40,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760000462] [2022-12-13 17:27:40,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760000462] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:40,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:40,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:27:40,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588472084] [2022-12-13 17:27:40,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:40,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:27:40,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:27:40,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:27:40,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:27:40,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 465 [2022-12-13 17:27:40,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 72 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:40,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:40,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 465 [2022-12-13 17:27:40,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:05,679 INFO L130 PetriNetUnfolder]: 245153/299642 cut-off events. [2022-12-13 17:28:05,679 INFO L131 PetriNetUnfolder]: For 74895/74895 co-relation queries the response was YES. [2022-12-13 17:28:06,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697507 conditions, 299642 events. 245153/299642 cut-off events. For 74895/74895 co-relation queries the response was YES. Maximal size of possible extension queue 9482. Compared 1664886 event pairs, 148320 based on Foata normal form. 0/211766 useless extension candidates. Maximal degree in co-relation 697477. Up to 298499 conditions per place. [2022-12-13 17:28:07,731 INFO L137 encePairwiseOnDemand]: 462/465 looper letters, 67 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2022-12-13 17:28:07,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 70 transitions, 436 flow [2022-12-13 17:28:07,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:28:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:28:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2022-12-13 17:28:07,734 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4645161290322581 [2022-12-13 17:28:07,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2022-12-13 17:28:07,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2022-12-13 17:28:07,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:07,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2022-12-13 17:28:07,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:07,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:07,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:07,739 INFO L175 Difference]: Start difference. First operand has 94 places, 72 transitions, 304 flow. Second operand 3 states and 648 transitions. [2022-12-13 17:28:07,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 70 transitions, 436 flow [2022-12-13 17:28:07,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 70 transitions, 435 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:28:07,762 INFO L231 Difference]: Finished difference. Result has 93 places, 70 transitions, 301 flow [2022-12-13 17:28:07,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=93, PETRI_TRANSITIONS=70} [2022-12-13 17:28:07,762 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -3 predicate places. [2022-12-13 17:28:07,762 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 70 transitions, 301 flow [2022-12-13 17:28:07,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:07,763 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:07,763 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:07,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-12-13 17:28:07,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:28:07,965 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:28:07,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:07,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1523322292, now seen corresponding path program 1 times [2022-12-13 17:28:07,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:28:07,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271296625] [2022-12-13 17:28:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:07,967 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 17:28:07,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:28:07,970 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:28:07,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:28:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:08,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 17:28:08,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:08,318 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-12-13 17:28:08,319 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-12-13 17:28:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:08,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:08,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:28:08,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271296625] [2022-12-13 17:28:08,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271296625] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:08,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:28:08,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 17:28:08,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485686440] [2022-12-13 17:28:08,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:08,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:28:08,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:28:08,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:28:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:28:12,587 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 465 [2022-12-13 17:28:12,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 70 transitions, 301 flow. Second operand has 10 states, 10 states have (on average 188.6) internal successors, (1886), 10 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:12,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:12,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 465 [2022-12-13 17:28:12,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:50,912 INFO L130 PetriNetUnfolder]: 357167/431420 cut-off events. [2022-12-13 17:28:50,912 INFO L131 PetriNetUnfolder]: For 96135/96135 co-relation queries the response was YES. [2022-12-13 17:28:52,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007540 conditions, 431420 events. 357167/431420 cut-off events. For 96135/96135 co-relation queries the response was YES. Maximal size of possible extension queue 12713. Compared 2436748 event pairs, 63639 based on Foata normal form. 6588/316751 useless extension candidates. Maximal degree in co-relation 1007509. Up to 150580 conditions per place. [2022-12-13 17:28:54,386 INFO L137 encePairwiseOnDemand]: 459/465 looper letters, 175 selfloop transitions, 13 changer transitions 0/190 dead transitions. [2022-12-13 17:28:54,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 190 transitions, 968 flow [2022-12-13 17:28:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:28:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 17:28:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1670 transitions. [2022-12-13 17:28:54,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4489247311827957 [2022-12-13 17:28:54,392 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1670 transitions. [2022-12-13 17:28:54,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1670 transitions. [2022-12-13 17:28:54,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:54,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1670 transitions. [2022-12-13 17:28:54,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 208.75) internal successors, (1670), 8 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:54,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 465.0) internal successors, (4185), 9 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:54,399 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 465.0) internal successors, (4185), 9 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:54,399 INFO L175 Difference]: Start difference. First operand has 93 places, 70 transitions, 301 flow. Second operand 8 states and 1670 transitions. [2022-12-13 17:28:54,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 190 transitions, 968 flow [2022-12-13 17:28:54,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 190 transitions, 965 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 17:28:54,430 INFO L231 Difference]: Finished difference. Result has 104 places, 75 transitions, 373 flow [2022-12-13 17:28:54,430 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=373, PETRI_PLACES=104, PETRI_TRANSITIONS=75} [2022-12-13 17:28:54,431 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, 8 predicate places. [2022-12-13 17:28:54,431 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 75 transitions, 373 flow [2022-12-13 17:28:54,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 188.6) internal successors, (1886), 10 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:54,431 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:54,431 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:54,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:28:54,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:28:54,633 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:28:54,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:54,634 INFO L85 PathProgramCache]: Analyzing trace with hash 262208200, now seen corresponding path program 1 times [2022-12-13 17:28:54,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:28:54,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346651934] [2022-12-13 17:28:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:54,635 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 17:28:54,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:28:54,638 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:28:54,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:28:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:54,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:28:54,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:54,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:28:54,782 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:28:54,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346651934] [2022-12-13 17:28:54,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346651934] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:54,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:54,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:28:54,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062159508] [2022-12-13 17:28:54,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:54,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:28:54,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:28:54,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:28:54,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:28:55,087 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 465 [2022-12-13 17:28:55,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 75 transitions, 373 flow. Second operand has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:55,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:55,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 465 [2022-12-13 17:28:55,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:29:53,986 INFO L130 PetriNetUnfolder]: 508583/613328 cut-off events. [2022-12-13 17:29:53,986 INFO L131 PetriNetUnfolder]: For 530557/530827 co-relation queries the response was YES. [2022-12-13 17:29:56,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1638357 conditions, 613328 events. 508583/613328 cut-off events. For 530557/530827 co-relation queries the response was YES. Maximal size of possible extension queue 17664. Compared 3522637 event pairs, 80109 based on Foata normal form. 72/447386 useless extension candidates. Maximal degree in co-relation 1638320. Up to 434160 conditions per place. [2022-12-13 17:29:59,116 INFO L137 encePairwiseOnDemand]: 457/465 looper letters, 129 selfloop transitions, 7 changer transitions 0/138 dead transitions. [2022-12-13 17:29:59,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 138 transitions, 843 flow [2022-12-13 17:29:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:29:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:29:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1086 transitions. [2022-12-13 17:29:59,123 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4670967741935484 [2022-12-13 17:29:59,123 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1086 transitions. [2022-12-13 17:29:59,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1086 transitions. [2022-12-13 17:29:59,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:59,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1086 transitions. [2022-12-13 17:29:59,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 217.2) internal successors, (1086), 5 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:59,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 465.0) internal successors, (2790), 6 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:59,130 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 465.0) internal successors, (2790), 6 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:59,130 INFO L175 Difference]: Start difference. First operand has 104 places, 75 transitions, 373 flow. Second operand 5 states and 1086 transitions. [2022-12-13 17:29:59,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 138 transitions, 843 flow [2022-12-13 17:30:06,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 138 transitions, 816 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-12-13 17:30:06,406 INFO L231 Difference]: Finished difference. Result has 106 places, 76 transitions, 378 flow [2022-12-13 17:30:06,406 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=378, PETRI_PLACES=106, PETRI_TRANSITIONS=76} [2022-12-13 17:30:06,406 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, 10 predicate places. [2022-12-13 17:30:06,407 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 76 transitions, 378 flow [2022-12-13 17:30:06,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:06,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:06,407 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:06,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 17:30:06,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:30:06,609 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:30:06,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:06,610 INFO L85 PathProgramCache]: Analyzing trace with hash 262455781, now seen corresponding path program 1 times [2022-12-13 17:30:06,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:30:06,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71867664] [2022-12-13 17:30:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:06,611 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 17:30:06,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:30:06,614 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:30:06,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:30:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:06,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 17:30:06,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:06,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:30:06,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:30:06,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:30:06,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:30:06,932 INFO L321 Elim1Store]: treesize reduction 150, result has 29.9 percent of original size [2022-12-13 17:30:06,932 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 5 case distinctions, treesize of input 23 treesize of output 71 [2022-12-13 17:30:06,946 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 22 treesize of output 20 [2022-12-13 17:30:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:30:07,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:30:07,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:30:07,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71867664] [2022-12-13 17:30:07,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71867664] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:30:07,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:30:07,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:30:07,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215956952] [2022-12-13 17:30:07,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:30:07,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:30:07,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:30:07,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:30:07,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:30:07,297 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 465 [2022-12-13 17:30:07,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 76 transitions, 378 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:07,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:07,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 465 [2022-12-13 17:30:07,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:03,494 INFO L130 PetriNetUnfolder]: 483455/585374 cut-off events. [2022-12-13 17:31:03,494 INFO L131 PetriNetUnfolder]: For 555126/555126 co-relation queries the response was YES. [2022-12-13 17:31:06,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1588381 conditions, 585374 events. 483455/585374 cut-off events. For 555126/555126 co-relation queries the response was YES. Maximal size of possible extension queue 17162. Compared 3319536 event pairs, 294552 based on Foata normal form. 0/457403 useless extension candidates. Maximal degree in co-relation 1588343. Up to 583475 conditions per place. [2022-12-13 17:31:08,817 INFO L137 encePairwiseOnDemand]: 462/465 looper letters, 71 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2022-12-13 17:31:08,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 74 transitions, 518 flow [2022-12-13 17:31:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:31:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:31:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2022-12-13 17:31:08,820 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46308243727598564 [2022-12-13 17:31:08,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2022-12-13 17:31:08,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2022-12-13 17:31:08,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:08,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2022-12-13 17:31:08,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:08,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:08,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:08,823 INFO L175 Difference]: Start difference. First operand has 106 places, 76 transitions, 378 flow. Second operand 3 states and 646 transitions. [2022-12-13 17:31:08,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 74 transitions, 518 flow [2022-12-13 17:31:09,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 74 transitions, 506 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 17:31:09,545 INFO L231 Difference]: Finished difference. Result has 103 places, 74 transitions, 364 flow [2022-12-13 17:31:09,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=364, PETRI_PLACES=103, PETRI_TRANSITIONS=74} [2022-12-13 17:31:09,546 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, 7 predicate places. [2022-12-13 17:31:09,546 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 74 transitions, 364 flow [2022-12-13 17:31:09,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:09,546 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:09,546 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:09,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:31:09,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:31:09,748 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:31:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:09,749 INFO L85 PathProgramCache]: Analyzing trace with hash 262455780, now seen corresponding path program 1 times [2022-12-13 17:31:09,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:31:09,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467731341] [2022-12-13 17:31:09,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:09,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:31:09,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:31:09,754 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:31:09,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:31:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:09,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:31:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:31:10,016 INFO L321 Elim1Store]: treesize reduction 286, result has 12.3 percent of original size [2022-12-13 17:31:10,016 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 6 case distinctions, treesize of input 43 treesize of output 66 [2022-12-13 17:31:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:31:10,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:31:10,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:31:10,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467731341] [2022-12-13 17:31:10,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467731341] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:31:10,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:31:10,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:31:10,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702122842] [2022-12-13 17:31:10,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:31:10,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:31:10,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:31:10,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:31:10,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:31:10,261 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 465 [2022-12-13 17:31:10,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 74 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:10,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:10,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 465 [2022-12-13 17:31:10,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:32:03,909 INFO L130 PetriNetUnfolder]: 473699/572792 cut-off events. [2022-12-13 17:32:03,909 INFO L131 PetriNetUnfolder]: For 511530/511530 co-relation queries the response was YES. [2022-12-13 17:32:06,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537828 conditions, 572792 events. 473699/572792 cut-off events. For 511530/511530 co-relation queries the response was YES. Maximal size of possible extension queue 16908. Compared 3229251 event pairs, 288270 based on Foata normal form. 0/449609 useless extension candidates. Maximal degree in co-relation 1537790. Up to 570893 conditions per place. [2022-12-13 17:32:08,772 INFO L137 encePairwiseOnDemand]: 462/465 looper letters, 69 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2022-12-13 17:32:08,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 72 transitions, 500 flow [2022-12-13 17:32:08,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:32:08,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:32:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2022-12-13 17:32:08,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44874551971326165 [2022-12-13 17:32:08,775 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2022-12-13 17:32:08,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2022-12-13 17:32:08,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:32:08,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2022-12-13 17:32:08,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:32:08,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:32:08,778 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 465.0) internal successors, (1860), 4 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:32:08,778 INFO L175 Difference]: Start difference. First operand has 103 places, 74 transitions, 364 flow. Second operand 3 states and 626 transitions. [2022-12-13 17:32:08,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 72 transitions, 500 flow [2022-12-13 17:32:09,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 72 transitions, 499 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:32:09,498 INFO L231 Difference]: Finished difference. Result has 102 places, 72 transitions, 361 flow [2022-12-13 17:32:09,498 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=361, PETRI_PLACES=102, PETRI_TRANSITIONS=72} [2022-12-13 17:32:09,499 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, 6 predicate places. [2022-12-13 17:32:09,499 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 72 transitions, 361 flow [2022-12-13 17:32:09,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:32:09,499 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:32:09,499 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:32:09,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 17:32:09,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:32:09,700 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:32:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:32:09,701 INFO L85 PathProgramCache]: Analyzing trace with hash -461475413, now seen corresponding path program 1 times [2022-12-13 17:32:09,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:32:09,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961499208] [2022-12-13 17:32:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:32:09,701 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 17:32:09,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:32:09,703 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:32:09,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:32:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:32:09,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 17:32:09,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:32:10,100 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-12-13 17:32:10,100 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-12-13 17:32:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:32:10,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:32:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:32:10,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:32:10,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961499208] [2022-12-13 17:32:10,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961499208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:32:10,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:32:10,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 17:32:10,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015136069] [2022-12-13 17:32:10,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:32:10,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:32:10,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:32:10,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:32:10,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:32:14,247 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 465 [2022-12-13 17:32:14,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 72 transitions, 361 flow. Second operand has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:32:14,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:32:14,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 465 [2022-12-13 17:32:14,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:33:36,867 INFO L130 PetriNetUnfolder]: 712838/852647 cut-off events. [2022-12-13 17:33:36,867 INFO L131 PetriNetUnfolder]: For 731337/731337 co-relation queries the response was YES. [2022-12-13 17:33:41,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2285153 conditions, 852647 events. 712838/852647 cut-off events. For 731337/731337 co-relation queries the response was YES. Maximal size of possible extension queue 22752. Compared 4900387 event pairs, 157446 based on Foata normal form. 13572/692591 useless extension candidates. Maximal degree in co-relation 2285114. Up to 322255 conditions per place. [2022-12-13 17:33:44,483 INFO L137 encePairwiseOnDemand]: 459/465 looper letters, 189 selfloop transitions, 13 changer transitions 0/204 dead transitions. [2022-12-13 17:33:44,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 204 transitions, 1255 flow [2022-12-13 17:33:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:33:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 17:33:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1654 transitions. [2022-12-13 17:33:44,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4446236559139785 [2022-12-13 17:33:44,488 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1654 transitions. [2022-12-13 17:33:44,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1654 transitions. [2022-12-13 17:33:44,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:33:44,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1654 transitions. [2022-12-13 17:33:44,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 206.75) internal successors, (1654), 8 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:33:44,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 465.0) internal successors, (4185), 9 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:33:44,496 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 465.0) internal successors, (4185), 9 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:33:44,496 INFO L175 Difference]: Start difference. First operand has 102 places, 72 transitions, 361 flow. Second operand 8 states and 1654 transitions. [2022-12-13 17:33:44,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 204 transitions, 1255 flow [2022-12-13 17:33:45,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 204 transitions, 1252 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 17:33:45,584 INFO L231 Difference]: Finished difference. Result has 113 places, 77 transitions, 433 flow [2022-12-13 17:33:45,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=465, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=433, PETRI_PLACES=113, PETRI_TRANSITIONS=77} [2022-12-13 17:33:45,585 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, 17 predicate places. [2022-12-13 17:33:45,585 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 77 transitions, 433 flow [2022-12-13 17:33:45,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:33:45,586 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:33:45,586 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:33:45,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:33:45,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:33:45,787 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-12-13 17:33:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:45,788 INFO L85 PathProgramCache]: Analyzing trace with hash -453811445, now seen corresponding path program 1 times [2022-12-13 17:33:45,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:33:45,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567293254] [2022-12-13 17:33:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:45,790 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 17:33:45,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:33:45,793 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:33:45,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09e8a013-9f6f-4f25-ac05-aae48b4b79d9/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:33:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:33:45,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:33:45,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:33:45,983 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 17:33:45,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:33:46,160 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 17:33:46,216 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 17:33:46,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:33:46,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567293254] [2022-12-13 17:33:46,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567293254] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:33:46,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:33:46,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 17:33:46,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317905802] [2022-12-13 17:33:46,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:33:46,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:33:46,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:33:46,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:33:46,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:33:48,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 465 [2022-12-13 17:33:48,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 77 transitions, 433 flow. Second operand has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:33:48,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:33:48,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 465 [2022-12-13 17:33:48,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand