./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/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_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/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_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --- 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 18:53:39,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:53:39,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:53:39,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:53:39,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:53:39,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:53:39,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:53:39,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:53:39,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:53:39,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:53:39,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:53:39,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:53:39,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:53:39,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:53:39,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:53:39,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:53:39,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:53:39,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:53:39,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:53:39,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:53:39,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:53:39,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:53:39,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:53:39,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:53:39,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:53:39,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:53:39,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:53:39,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:53:39,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:53:39,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:53:39,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:53:39,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:53:39,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:53:39,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:53:39,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:53:39,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:53:39,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:53:39,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:53:39,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:53:39,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:53:39,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:53:39,728 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 18:53:39,747 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:53:39,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:53:39,747 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:53:39,748 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:53:39,748 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:53:39,748 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:53:39,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:53:39,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:53:39,749 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:53:39,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:53:39,750 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:53:39,750 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:53:39,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:53:39,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:53:39,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:53:39,750 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:53:39,751 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:53:39,751 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:53:39,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:53:39,751 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:53:39,751 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:53:39,751 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:53:39,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:53:39,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:53:39,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:53:39,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:53:39,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:53:39,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:53:39,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:53:39,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:53:39,753 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:53:39,753 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:53:39,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:53:39,753 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:53:39,754 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_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc [2022-12-13 18:53:39,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:53:39,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:53:39,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:53:39,978 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:53:39,979 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:53:39,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2022-12-13 18:53:42,508 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:53:42,687 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:53:42,687 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2022-12-13 18:53:42,693 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/data/65e8e4e2e/ce339c9998c74c06864c377907adebb5/FLAGe01d50f4b [2022-12-13 18:53:43,093 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/data/65e8e4e2e/ce339c9998c74c06864c377907adebb5 [2022-12-13 18:53:43,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:53:43,096 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:53:43,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:53:43,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:53:43,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:53:43,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:53:43" (1/1) ... [2022-12-13 18:53:43,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bc5f788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:43, skipping insertion in model container [2022-12-13 18:53:43,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:53:43" (1/1) ... [2022-12-13 18:53:43,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:53:43,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:53:43,265 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:43,266 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:43,267 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:43,267 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:43,269 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:43,270 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:43,270 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:43,271 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:43,278 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_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-12-13 18:53:43,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:53:43,297 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 18:53:43,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@66b05a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:43, skipping insertion in model container [2022-12-13 18:53:43,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:53:43,298 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 18:53:43,299 INFO L158 Benchmark]: Toolchain (without parser) took 201.97ms. Allocated memory is still 130.0MB. Free memory was 95.9MB in the beginning and 85.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 18:53:43,299 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 130.0MB. Free memory is still 102.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 18:53:43,300 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.30ms. Allocated memory is still 130.0MB. Free memory was 95.9MB in the beginning and 85.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 18:53:43,301 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 130.0MB. Free memory is still 102.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 200.30ms. Allocated memory is still 130.0MB. Free memory was 95.9MB in the beginning and 85.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: 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_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/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_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/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_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --- 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 18:53:44,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:53:44,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:53:44,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:53:44,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:53:44,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:53:44,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:53:44,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:53:44,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:53:44,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:53:44,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:53:44,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:53:44,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:53:44,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:53:44,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:53:44,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:53:44,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:53:44,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:53:44,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:53:44,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:53:44,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:53:44,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:53:44,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:53:44,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:53:44,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:53:44,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:53:44,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:53:44,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:53:44,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:53:44,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:53:44,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:53:44,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:53:44,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:53:44,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:53:44,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:53:44,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:53:44,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:53:44,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:53:44,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:53:44,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:53:44,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:53:44,716 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 18:53:44,731 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:53:44,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:53:44,732 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:53:44,732 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:53:44,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:53:44,732 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:53:44,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:53:44,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:53:44,733 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:53:44,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:53:44,733 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:53:44,734 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:53:44,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:53:44,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:53:44,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:53:44,734 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:53:44,734 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:53:44,734 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:53:44,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:53:44,734 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:53:44,735 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 18:53:44,735 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 18:53:44,735 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:53:44,735 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:53:44,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:53:44,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:53:44,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:53:44,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:53:44,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:53:44,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:53:44,736 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 18:53:44,736 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 18:53:44,736 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:53:44,736 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:53:44,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:53:44,736 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 18:53:44,736 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:53:44,737 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_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc [2022-12-13 18:53:44,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:53:44,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:53:44,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:53:44,981 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:53:44,981 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:53:44,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2022-12-13 18:53:47,563 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:53:47,715 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:53:47,716 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2022-12-13 18:53:47,721 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/data/8e795f2b2/3b130c3f1fbd4c15b381cc4a0beaa2d3/FLAG587662d94 [2022-12-13 18:53:47,731 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/data/8e795f2b2/3b130c3f1fbd4c15b381cc4a0beaa2d3 [2022-12-13 18:53:47,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:53:47,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:53:47,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:53:47,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:53:47,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:53:47,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:53:47" (1/1) ... [2022-12-13 18:53:47,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41b29d75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:47, skipping insertion in model container [2022-12-13 18:53:47,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:53:47" (1/1) ... [2022-12-13 18:53:47,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:53:47,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:53:47,869 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:47,870 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:47,870 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:47,870 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:47,872 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:47,872 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:47,873 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:47,873 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:47,879 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_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-12-13 18:53:47,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:53:47,896 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 18:53:47,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:53:47,904 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:47,905 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:47,905 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:47,905 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:47,906 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:47,907 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:47,907 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:47,907 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:47,910 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_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-12-13 18:53:47,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:53:47,917 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:53:47,928 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:47,929 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:47,929 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:47,930 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:47,930 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:47,931 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:47,931 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:53:47,932 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:53:47,935 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_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-12-13 18:53:47,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:53:47,950 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:53:47,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:47 WrapperNode [2022-12-13 18:53:47,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:53:47,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:53:47,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:53:47,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:53:47,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:47" (1/1) ... [2022-12-13 18:53:47,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:47" (1/1) ... [2022-12-13 18:53:48,000 INFO L138 Inliner]: procedures = 28, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 120 [2022-12-13 18:53:48,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:53:48,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:53:48,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:53:48,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:53:48,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:47" (1/1) ... [2022-12-13 18:53:48,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:47" (1/1) ... [2022-12-13 18:53:48,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:47" (1/1) ... [2022-12-13 18:53:48,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:47" (1/1) ... [2022-12-13 18:53:48,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:47" (1/1) ... [2022-12-13 18:53:48,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:47" (1/1) ... [2022-12-13 18:53:48,028 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:47" (1/1) ... [2022-12-13 18:53:48,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:47" (1/1) ... [2022-12-13 18:53:48,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:53:48,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:53:48,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:53:48,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:53:48,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:47" (1/1) ... [2022-12-13 18:53:48,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:53:48,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:53:48,061 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:53:48,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:53:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:53:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 18:53:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:53:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 18:53:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 18:53:48,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 18:53:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 18:53:48,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 18:53:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 18:53:48,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 18:53:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 18:53:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 18:53:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 18:53:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:53:48,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:53:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:53:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 18:53:48,098 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 18:53:48,183 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:53:48,184 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:53:48,599 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:53:48,627 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:53:48,627 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-13 18:53:48,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:53:48 BoogieIcfgContainer [2022-12-13 18:53:48,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:53:48,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:53:48,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:53:48,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:53:48,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:53:47" (1/3) ... [2022-12-13 18:53:48,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a29fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:53:48, skipping insertion in model container [2022-12-13 18:53:48,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:53:47" (2/3) ... [2022-12-13 18:53:48,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a29fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:53:48, skipping insertion in model container [2022-12-13 18:53:48,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:53:48" (3/3) ... [2022-12-13 18:53:48,635 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2022-12-13 18:53:48,648 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:53:48,649 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-12-13 18:53:48,649 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:53:48,724 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 18:53:48,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 213 transitions, 450 flow [2022-12-13 18:53:48,806 INFO L130 PetriNetUnfolder]: 16/210 cut-off events. [2022-12-13 18:53:48,806 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 18:53:48,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 210 events. 16/210 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 229 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 158. Up to 3 conditions per place. [2022-12-13 18:53:48,810 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 213 transitions, 450 flow [2022-12-13 18:53:48,814 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 205 transitions, 428 flow [2022-12-13 18:53:48,817 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:53:48,825 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 205 transitions, 428 flow [2022-12-13 18:53:48,827 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 205 transitions, 428 flow [2022-12-13 18:53:48,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 205 transitions, 428 flow [2022-12-13 18:53:48,858 INFO L130 PetriNetUnfolder]: 16/205 cut-off events. [2022-12-13 18:53:48,858 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 18:53:48,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 205 events. 16/205 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 225 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 158. Up to 3 conditions per place. [2022-12-13 18:53:48,860 INFO L119 LiptonReduction]: Number of co-enabled transitions 2868 [2022-12-13 18:54:07,052 INFO L134 LiptonReduction]: Checked pairs total: 4514 [2022-12-13 18:54:07,052 INFO L136 LiptonReduction]: Total number of compositions: 209 [2022-12-13 18:54:07,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:54:07,069 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;@77d0d634, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:54:07,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2022-12-13 18:54:07,072 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 18:54:07,072 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:54:07,072 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:07,073 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:54:07,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:54:07,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:07,078 INFO L85 PathProgramCache]: Analyzing trace with hash 25217, now seen corresponding path program 1 times [2022-12-13 18:54:07,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:54:07,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329747033] [2022-12-13 18:54:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:07,089 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 18:54:07,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:54:07,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:07,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:07,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:54:07,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:07,327 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:54:07,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:54:07,359 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 18:54:07,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:54:07,360 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:54:07,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329747033] [2022-12-13 18:54:07,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329747033] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:07,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:07,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:54:07,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389258057] [2022-12-13 18:54:07,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:07,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:54:07,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:54:07,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:54:07,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:54:07,599 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 422 [2022-12-13 18:54:07,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:07,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:07,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 422 [2022-12-13 18:54:07,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:09,114 INFO L130 PetriNetUnfolder]: 10969/13701 cut-off events. [2022-12-13 18:54:09,114 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2022-12-13 18:54:09,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27619 conditions, 13701 events. 10969/13701 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 63996 event pairs, 5222 based on Foata normal form. 0/3705 useless extension candidates. Maximal degree in co-relation 11877. Up to 6812 conditions per place. [2022-12-13 18:54:09,174 INFO L137 encePairwiseOnDemand]: 415/422 looper letters, 93 selfloop transitions, 4 changer transitions 0/100 dead transitions. [2022-12-13 18:54:09,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 100 transitions, 430 flow [2022-12-13 18:54:09,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:54:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:54:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2022-12-13 18:54:09,186 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5086887835703001 [2022-12-13 18:54:09,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2022-12-13 18:54:09,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2022-12-13 18:54:09,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:54:09,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2022-12-13 18:54:09,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:09,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:09,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:09,200 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 126 flow. Second operand 3 states and 644 transitions. [2022-12-13 18:54:09,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 100 transitions, 430 flow [2022-12-13 18:54:09,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 100 transitions, 406 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 18:54:09,226 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 144 flow [2022-12-13 18:54:09,227 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2022-12-13 18:54:09,229 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2022-12-13 18:54:09,230 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 144 flow [2022-12-13 18:54:09,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:09,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:09,230 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:54:09,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:09,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:09,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:54:09,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:09,431 INFO L85 PathProgramCache]: Analyzing trace with hash 25216, now seen corresponding path program 1 times [2022-12-13 18:54:09,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:54:09,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652665645] [2022-12-13 18:54:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:09,432 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 18:54:09,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:54:09,433 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:09,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:09,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:54:09,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:09,552 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:54:09,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:54:09,564 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 18:54:09,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:54:09,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:54:09,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652665645] [2022-12-13 18:54:09,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652665645] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:09,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:09,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:54:09,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555926526] [2022-12-13 18:54:09,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:09,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:54:09,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:54:09,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:54:09,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:54:09,664 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 422 [2022-12-13 18:54:09,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:09,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:09,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 422 [2022-12-13 18:54:09,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:10,733 INFO L130 PetriNetUnfolder]: 10969/13697 cut-off events. [2022-12-13 18:54:10,734 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-12-13 18:54:10,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27421 conditions, 13697 events. 10969/13697 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 64341 event pairs, 5222 based on Foata normal form. 2/3591 useless extension candidates. Maximal degree in co-relation 13699. Up to 13615 conditions per place. [2022-12-13 18:54:10,779 INFO L137 encePairwiseOnDemand]: 419/422 looper letters, 50 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2022-12-13 18:54:10,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 242 flow [2022-12-13 18:54:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:54:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:54:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2022-12-13 18:54:10,782 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4684044233807267 [2022-12-13 18:54:10,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2022-12-13 18:54:10,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2022-12-13 18:54:10,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:54:10,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2022-12-13 18:54:10,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 18:54:10,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:10,786 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:10,786 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 144 flow. Second operand 3 states and 593 transitions. [2022-12-13 18:54:10,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 242 flow [2022-12-13 18:54:10,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:54:10,787 INFO L231 Difference]: Finished difference. Result has 53 places, 54 transitions, 134 flow [2022-12-13 18:54:10,787 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=53, PETRI_TRANSITIONS=54} [2022-12-13 18:54:10,788 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, -5 predicate places. [2022-12-13 18:54:10,788 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 54 transitions, 134 flow [2022-12-13 18:54:10,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:10,788 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:10,788 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 18:54:10,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:10,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:10,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:54:10,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:10,990 INFO L85 PathProgramCache]: Analyzing trace with hash 788398, now seen corresponding path program 1 times [2022-12-13 18:54:10,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:54:10,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869241681] [2022-12-13 18:54:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:10,990 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 18:54:10,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:54:10,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:10,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:11,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:54:11,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:11,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:11,124 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-13 18:54:11,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-12-13 18:54:11,450 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-12-13 18:54:11,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-12-13 18:54:11,516 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 18:54:11,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:54:11,516 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:54:11,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869241681] [2022-12-13 18:54:11,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869241681] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:11,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:11,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:54:11,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016804807] [2022-12-13 18:54:11,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:11,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:54:11,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:54:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:54:11,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:54:11,804 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 422 [2022-12-13 18:54:11,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 54 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:11,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:11,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 422 [2022-12-13 18:54:11,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:12,757 INFO L130 PetriNetUnfolder]: 8611/10857 cut-off events. [2022-12-13 18:54:12,757 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-12-13 18:54:12,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21738 conditions, 10857 events. 8611/10857 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 50907 event pairs, 4088 based on Foata normal form. 0/3045 useless extension candidates. Maximal degree in co-relation 21730. Up to 10775 conditions per place. [2022-12-13 18:54:12,795 INFO L137 encePairwiseOnDemand]: 419/422 looper letters, 48 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2022-12-13 18:54:12,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 228 flow [2022-12-13 18:54:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:54:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:54:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 600 transitions. [2022-12-13 18:54:12,798 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47393364928909953 [2022-12-13 18:54:12,798 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 600 transitions. [2022-12-13 18:54:12,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 600 transitions. [2022-12-13 18:54:12,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:54:12,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 600 transitions. [2022-12-13 18:54:12,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 18:54:12,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:12,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:12,802 INFO L175 Difference]: Start difference. First operand has 53 places, 54 transitions, 134 flow. Second operand 3 states and 600 transitions. [2022-12-13 18:54:12,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 228 flow [2022-12-13 18:54:12,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:54:12,803 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 131 flow [2022-12-13 18:54:12,804 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2022-12-13 18:54:12,804 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2022-12-13 18:54:12,804 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 131 flow [2022-12-13 18:54:12,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:12,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:12,805 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 18:54:12,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:13,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:13,006 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:54:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:13,006 INFO L85 PathProgramCache]: Analyzing trace with hash 788397, now seen corresponding path program 1 times [2022-12-13 18:54:13,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:54:13,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436317949] [2022-12-13 18:54:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:13,007 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 18:54:13,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:54:13,008 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:13,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:13,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 18:54:13,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:13,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:13,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:13,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:13,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:13,162 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-13 18:54:13,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-13 18:54:13,182 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 18:54:13,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 18:54:13,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:13,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:54:13,247 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 18:54:13,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:54:13,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:54:13,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436317949] [2022-12-13 18:54:13,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436317949] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:13,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:13,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:54:13,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501834496] [2022-12-13 18:54:13,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:13,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:54:13,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:54:13,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:54:13,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:54:13,515 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 422 [2022-12-13 18:54:13,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:13,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:13,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 422 [2022-12-13 18:54:13,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:14,274 INFO L130 PetriNetUnfolder]: 6253/8017 cut-off events. [2022-12-13 18:54:14,274 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-12-13 18:54:14,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16059 conditions, 8017 events. 6253/8017 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 37784 event pairs, 2954 based on Foata normal form. 0/2503 useless extension candidates. Maximal degree in co-relation 16050. Up to 7935 conditions per place. [2022-12-13 18:54:14,297 INFO L137 encePairwiseOnDemand]: 419/422 looper letters, 46 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2022-12-13 18:54:14,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 221 flow [2022-12-13 18:54:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:54:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:54:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2022-12-13 18:54:14,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47472353870458134 [2022-12-13 18:54:14,299 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2022-12-13 18:54:14,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2022-12-13 18:54:14,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:54:14,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2022-12-13 18:54:14,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:14,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:14,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:14,302 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 131 flow. Second operand 3 states and 601 transitions. [2022-12-13 18:54:14,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 221 flow [2022-12-13 18:54:14,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:54:14,303 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 128 flow [2022-12-13 18:54:14,303 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2022-12-13 18:54:14,304 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2022-12-13 18:54:14,304 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 128 flow [2022-12-13 18:54:14,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:14,304 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:14,304 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 18:54:14,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:14,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:14,505 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:54:14,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:14,505 INFO L85 PathProgramCache]: Analyzing trace with hash 786484, now seen corresponding path program 1 times [2022-12-13 18:54:14,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:54:14,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956101737] [2022-12-13 18:54:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:14,506 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 18:54:14,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:54:14,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:14,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:14,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:54:14,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:14,647 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:54:14,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:54:14,707 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 18:54:14,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:14,906 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 18:54:14,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:54:14,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956101737] [2022-12-13 18:54:14,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956101737] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:14,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:54:14,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 18:54:14,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786034425] [2022-12-13 18:54:14,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:14,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:54:14,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:54:14,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:54:14,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:54:15,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 422 [2022-12-13 18:54:15,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 128 flow. Second operand has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:15,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:15,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 422 [2022-12-13 18:54:15,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:17,816 INFO L130 PetriNetUnfolder]: 9383/12032 cut-off events. [2022-12-13 18:54:17,816 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-12-13 18:54:17,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24104 conditions, 12032 events. 9383/12032 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 58679 event pairs, 4431 based on Foata normal form. 0/3860 useless extension candidates. Maximal degree in co-relation 24094. Up to 3969 conditions per place. [2022-12-13 18:54:17,851 INFO L137 encePairwiseOnDemand]: 415/422 looper letters, 119 selfloop transitions, 15 changer transitions 0/137 dead transitions. [2022-12-13 18:54:17,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 137 transitions, 600 flow [2022-12-13 18:54:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:54:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:54:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1166 transitions. [2022-12-13 18:54:17,853 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46050552922590837 [2022-12-13 18:54:17,853 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1166 transitions. [2022-12-13 18:54:17,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1166 transitions. [2022-12-13 18:54:17,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:54:17,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1166 transitions. [2022-12-13 18:54:17,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 194.33333333333334) internal successors, (1166), 6 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:17,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:17,858 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:17,858 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 128 flow. Second operand 6 states and 1166 transitions. [2022-12-13 18:54:17,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 137 transitions, 600 flow [2022-12-13 18:54:17,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 137 transitions, 599 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:54:17,860 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 240 flow [2022-12-13 18:54:17,860 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2022-12-13 18:54:17,861 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 1 predicate places. [2022-12-13 18:54:17,861 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 240 flow [2022-12-13 18:54:17,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:17,861 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:17,861 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 18:54:17,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-13 18:54:18,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:18,063 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:54:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:18,063 INFO L85 PathProgramCache]: Analyzing trace with hash 757666273, now seen corresponding path program 1 times [2022-12-13 18:54:18,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:54:18,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206155267] [2022-12-13 18:54:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:18,065 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 18:54:18,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:54:18,067 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:18,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:18,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 18:54:18,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:18,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:18,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:18,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:18,224 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 18:54:18,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-13 18:54:18,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 18:54:18,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:18,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:54:18,317 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 18:54:18,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:54:18,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:54:18,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206155267] [2022-12-13 18:54:18,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206155267] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:18,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:18,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:54:18,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329236923] [2022-12-13 18:54:18,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:18,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:54:18,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:54:18,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:54:18,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:54:18,509 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 422 [2022-12-13 18:54:18,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:18,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:18,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 422 [2022-12-13 18:54:18,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:19,318 INFO L130 PetriNetUnfolder]: 8864/11354 cut-off events. [2022-12-13 18:54:19,318 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-12-13 18:54:19,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22793 conditions, 11354 events. 8864/11354 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 55369 event pairs, 4176 based on Foata normal form. 0/3634 useless extension candidates. Maximal degree in co-relation 22778. Up to 11231 conditions per place. [2022-12-13 18:54:19,356 INFO L137 encePairwiseOnDemand]: 419/422 looper letters, 55 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2022-12-13 18:54:19,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 348 flow [2022-12-13 18:54:19,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:54:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:54:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2022-12-13 18:54:19,358 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4731437598736177 [2022-12-13 18:54:19,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2022-12-13 18:54:19,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2022-12-13 18:54:19,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:54:19,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2022-12-13 18:54:19,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:19,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:19,361 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:19,361 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 240 flow. Second operand 3 states and 599 transitions. [2022-12-13 18:54:19,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 348 flow [2022-12-13 18:54:19,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 329 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 18:54:19,362 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 219 flow [2022-12-13 18:54:19,362 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2022-12-13 18:54:19,363 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 0 predicate places. [2022-12-13 18:54:19,363 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 219 flow [2022-12-13 18:54:19,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:19,363 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:19,363 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 18:54:19,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:19,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:19,565 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:54:19,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:19,565 INFO L85 PathProgramCache]: Analyzing trace with hash 757666272, now seen corresponding path program 1 times [2022-12-13 18:54:19,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:54:19,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623392360] [2022-12-13 18:54:19,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:19,566 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 18:54:19,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:54:19,568 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:19,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:19,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 18:54:19,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:19,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:19,708 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-13 18:54:19,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-12-13 18:54:19,759 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 18:54:19,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 18:54:19,796 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 18:54:19,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:54:19,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:54:19,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623392360] [2022-12-13 18:54:19,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623392360] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:19,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:19,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:54:19,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086275249] [2022-12-13 18:54:19,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:19,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:54:19,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:54:19,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:54:19,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:54:19,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 422 [2022-12-13 18:54:19,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:19,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:19,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 422 [2022-12-13 18:54:19,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:20,741 INFO L130 PetriNetUnfolder]: 8345/10676 cut-off events. [2022-12-13 18:54:20,741 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 18:54:20,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21428 conditions, 10676 events. 8345/10676 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 51731 event pairs, 3921 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 21412. Up to 10553 conditions per place. [2022-12-13 18:54:20,767 INFO L137 encePairwiseOnDemand]: 419/422 looper letters, 53 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2022-12-13 18:54:20,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 323 flow [2022-12-13 18:54:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:54:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:54:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2022-12-13 18:54:20,769 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46919431279620855 [2022-12-13 18:54:20,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2022-12-13 18:54:20,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2022-12-13 18:54:20,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:54:20,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2022-12-13 18:54:20,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:20,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:20,771 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:20,771 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 219 flow. Second operand 3 states and 594 transitions. [2022-12-13 18:54:20,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 323 flow [2022-12-13 18:54:20,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:54:20,773 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 216 flow [2022-12-13 18:54:20,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2022-12-13 18:54:20,773 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2022-12-13 18:54:20,773 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 216 flow [2022-12-13 18:54:20,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:20,774 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:20,774 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:54:20,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 18:54:20,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:20,975 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:54:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:20,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2012811542, now seen corresponding path program 1 times [2022-12-13 18:54:20,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:54:20,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799387018] [2022-12-13 18:54:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:20,978 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 18:54:20,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:54:20,981 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:20,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:21,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:54:21,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:21,210 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 18:54:21,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:54:21,210 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:54:21,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799387018] [2022-12-13 18:54:21,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799387018] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:21,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:21,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:54:21,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221924620] [2022-12-13 18:54:21,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:21,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:54:21,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:54:21,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:54:21,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:54:21,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 422 [2022-12-13 18:54:21,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 216 flow. Second operand has 5 states, 5 states have (on average 180.2) internal successors, (901), 5 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:21,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:21,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 422 [2022-12-13 18:54:21,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:22,301 INFO L130 PetriNetUnfolder]: 6429/8501 cut-off events. [2022-12-13 18:54:22,301 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-12-13 18:54:22,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17098 conditions, 8501 events. 6429/8501 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 42963 event pairs, 2752 based on Foata normal form. 1/3371 useless extension candidates. Maximal degree in co-relation 17081. Up to 6315 conditions per place. [2022-12-13 18:54:22,326 INFO L137 encePairwiseOnDemand]: 413/422 looper letters, 98 selfloop transitions, 10 changer transitions 0/110 dead transitions. [2022-12-13 18:54:22,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 110 transitions, 554 flow [2022-12-13 18:54:22,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:54:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:54:22,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 996 transitions. [2022-12-13 18:54:22,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4720379146919431 [2022-12-13 18:54:22,329 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 996 transitions. [2022-12-13 18:54:22,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 996 transitions. [2022-12-13 18:54:22,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:54:22,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 996 transitions. [2022-12-13 18:54:22,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 199.2) internal successors, (996), 5 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:22,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:22,334 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:22,334 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 216 flow. Second operand 5 states and 996 transitions. [2022-12-13 18:54:22,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 110 transitions, 554 flow [2022-12-13 18:54:22,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 110 transitions, 553 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:54:22,336 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 266 flow [2022-12-13 18:54:22,336 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2022-12-13 18:54:22,337 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 5 predicate places. [2022-12-13 18:54:22,337 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 266 flow [2022-12-13 18:54:22,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 180.2) internal successors, (901), 5 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:22,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:22,337 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 18:54:22,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:22,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:22,539 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:54:22,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:22,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1960032065, now seen corresponding path program 2 times [2022-12-13 18:54:22,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:54:22,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391148087] [2022-12-13 18:54:22,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:54:22,543 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 18:54:22,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:54:22,546 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:22,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:22,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:54:22,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:22,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 18:54:22,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:22,767 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:54:22,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:54:22,885 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 18:54:22,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:23,443 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 18:54:23,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:54:23,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391148087] [2022-12-13 18:54:23,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391148087] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:23,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:54:23,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:54:23,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444152706] [2022-12-13 18:54:23,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:23,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:54:23,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:54:23,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:54:23,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:54:27,816 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 422 [2022-12-13 18:54:27,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 266 flow. Second operand has 12 states, 12 states have (on average 174.0) internal successors, (2088), 12 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:27,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:27,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 422 [2022-12-13 18:54:27,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:30,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:32,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:34,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:36,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:38,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:40,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:47,314 INFO L130 PetriNetUnfolder]: 26107/33473 cut-off events. [2022-12-13 18:54:47,314 INFO L131 PetriNetUnfolder]: For 2323/2444 co-relation queries the response was YES. [2022-12-13 18:54:47,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73706 conditions, 33473 events. 26107/33473 cut-off events. For 2323/2444 co-relation queries the response was YES. Maximal size of possible extension queue 1491. Compared 182251 event pairs, 12327 based on Foata normal form. 133/13873 useless extension candidates. Maximal degree in co-relation 73685. Up to 6565 conditions per place. [2022-12-13 18:54:47,450 INFO L137 encePairwiseOnDemand]: 415/422 looper letters, 343 selfloop transitions, 32 changer transitions 0/379 dead transitions. [2022-12-13 18:54:47,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 379 transitions, 1884 flow [2022-12-13 18:54:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:54:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 18:54:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2462 transitions. [2022-12-13 18:54:47,456 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4861769352290679 [2022-12-13 18:54:47,456 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2462 transitions. [2022-12-13 18:54:47,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2462 transitions. [2022-12-13 18:54:47,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:54:47,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2462 transitions. [2022-12-13 18:54:47,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 205.16666666666666) internal successors, (2462), 12 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:47,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 422.0) internal successors, (5486), 13 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:47,464 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 422.0) internal successors, (5486), 13 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:47,465 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 266 flow. Second operand 12 states and 2462 transitions. [2022-12-13 18:54:47,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 379 transitions, 1884 flow [2022-12-13 18:54:47,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 379 transitions, 1852 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 18:54:47,470 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 496 flow [2022-12-13 18:54:47,470 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=496, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2022-12-13 18:54:47,470 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 21 predicate places. [2022-12-13 18:54:47,470 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 496 flow [2022-12-13 18:54:47,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 174.0) internal successors, (2088), 12 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:47,471 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:47,471 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:47,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:47,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:47,673 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:54:47,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:47,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2027133171, now seen corresponding path program 1 times [2022-12-13 18:54:47,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:54:47,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303529941] [2022-12-13 18:54:47,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:47,676 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 18:54:47,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:54:47,678 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:47,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:47,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 18:54:47,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:47,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:47,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:47,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:47,880 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 18:54:47,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-13 18:54:47,889 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 18 treesize of output 16 [2022-12-13 18:54:47,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:54:47,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:54:47,971 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 18:54:47,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:54:47,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:54:47,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303529941] [2022-12-13 18:54:47,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303529941] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:47,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:47,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:54:47,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953305150] [2022-12-13 18:54:47,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:47,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:54:47,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:54:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:54:47,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:54:48,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 422 [2022-12-13 18:54:48,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 496 flow. Second operand has 4 states, 4 states have (on average 184.75) internal successors, (739), 4 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:48,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:48,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 422 [2022-12-13 18:54:48,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:50,660 INFO L130 PetriNetUnfolder]: 25566/32496 cut-off events. [2022-12-13 18:54:50,661 INFO L131 PetriNetUnfolder]: For 1807/1920 co-relation queries the response was YES. [2022-12-13 18:54:50,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71667 conditions, 32496 events. 25566/32496 cut-off events. For 1807/1920 co-relation queries the response was YES. Maximal size of possible extension queue 1324. Compared 171092 event pairs, 11840 based on Foata normal form. 113/13279 useless extension candidates. Maximal degree in co-relation 71639. Up to 32182 conditions per place. [2022-12-13 18:54:50,806 INFO L137 encePairwiseOnDemand]: 419/422 looper letters, 71 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2022-12-13 18:54:50,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 76 transitions, 636 flow [2022-12-13 18:54:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:54:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:54:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2022-12-13 18:54:50,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46524486571879936 [2022-12-13 18:54:50,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2022-12-13 18:54:50,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2022-12-13 18:54:50,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:54:50,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2022-12-13 18:54:50,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:50,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:50,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:50,812 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 496 flow. Second operand 3 states and 589 transitions. [2022-12-13 18:54:50,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 76 transitions, 636 flow [2022-12-13 18:54:50,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 577 flow, removed 14 selfloop flow, removed 4 redundant places. [2022-12-13 18:54:50,816 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 435 flow [2022-12-13 18:54:50,816 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=435, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2022-12-13 18:54:50,817 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 17 predicate places. [2022-12-13 18:54:50,817 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 435 flow [2022-12-13 18:54:50,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.75) internal successors, (739), 4 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:50,818 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:50,818 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:50,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-13 18:54:51,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:51,019 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:54:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2027133172, now seen corresponding path program 1 times [2022-12-13 18:54:51,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:54:51,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572024719] [2022-12-13 18:54:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:51,021 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 18:54:51,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:54:51,023 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:51,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:51,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:54:51,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:51,126 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 18:54:51,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-12-13 18:54:51,152 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 18:54:51,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 18:54:51,162 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 18:54:51,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:54:51,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:54:51,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572024719] [2022-12-13 18:54:51,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572024719] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:51,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:51,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:54:51,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71442457] [2022-12-13 18:54:51,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:51,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:54:51,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:54:51,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:54:51,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:54:51,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 422 [2022-12-13 18:54:51,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 435 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:51,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:51,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 422 [2022-12-13 18:54:51,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:53,587 INFO L130 PetriNetUnfolder]: 24299/30793 cut-off events. [2022-12-13 18:54:53,587 INFO L131 PetriNetUnfolder]: For 1746/1851 co-relation queries the response was YES. [2022-12-13 18:54:53,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67792 conditions, 30793 events. 24299/30793 cut-off events. For 1746/1851 co-relation queries the response was YES. Maximal size of possible extension queue 1240. Compared 159261 event pairs, 11203 based on Foata normal form. 105/12842 useless extension candidates. Maximal degree in co-relation 67763. Up to 30479 conditions per place. [2022-12-13 18:54:53,719 INFO L137 encePairwiseOnDemand]: 419/422 looper letters, 69 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2022-12-13 18:54:53,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 571 flow [2022-12-13 18:54:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:54:53,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:54:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2022-12-13 18:54:53,721 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46129541864139023 [2022-12-13 18:54:53,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2022-12-13 18:54:53,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2022-12-13 18:54:53,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:54:53,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2022-12-13 18:54:53,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:53,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:53,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:53,724 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 435 flow. Second operand 3 states and 584 transitions. [2022-12-13 18:54:53,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 571 flow [2022-12-13 18:54:53,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 570 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:54:53,727 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 432 flow [2022-12-13 18:54:53,727 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=72, 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=432, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2022-12-13 18:54:53,728 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2022-12-13 18:54:53,728 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 432 flow [2022-12-13 18:54:53,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:53,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:53,728 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:53,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:53,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:53,929 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:54:53,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:53,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1583375387, now seen corresponding path program 1 times [2022-12-13 18:54:53,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:54:53,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394093854] [2022-12-13 18:54:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:53,932 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 18:54:53,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:54:53,935 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:53,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:54,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:54:54,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:54,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 18:54:54,084 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 18:54:54,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:54:54,084 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:54:54,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394093854] [2022-12-13 18:54:54,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394093854] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:54,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:54,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:54:54,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951195282] [2022-12-13 18:54:54,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:54,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:54:54,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:54:54,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:54:54,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:54:54,403 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 422 [2022-12-13 18:54:54,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 432 flow. Second operand has 6 states, 6 states have (on average 178.33333333333334) internal successors, (1070), 6 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:54,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:54,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 422 [2022-12-13 18:54:54,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:58,361 INFO L130 PetriNetUnfolder]: 38661/49963 cut-off events. [2022-12-13 18:54:58,361 INFO L131 PetriNetUnfolder]: For 4237/4432 co-relation queries the response was YES. [2022-12-13 18:54:58,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111341 conditions, 49963 events. 38661/49963 cut-off events. For 4237/4432 co-relation queries the response was YES. Maximal size of possible extension queue 2136. Compared 294197 event pairs, 11843 based on Foata normal form. 195/23394 useless extension candidates. Maximal degree in co-relation 111311. Up to 28219 conditions per place. [2022-12-13 18:54:58,599 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 88 selfloop transitions, 8 changer transitions 0/99 dead transitions. [2022-12-13 18:54:58,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 684 flow [2022-12-13 18:54:58,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:54:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:54:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 948 transitions. [2022-12-13 18:54:58,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4492890995260663 [2022-12-13 18:54:58,602 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 948 transitions. [2022-12-13 18:54:58,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 948 transitions. [2022-12-13 18:54:58,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:54:58,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 948 transitions. [2022-12-13 18:54:58,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.6) internal successors, (948), 5 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:58,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:58,606 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:58,606 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 432 flow. Second operand 5 states and 948 transitions. [2022-12-13 18:54:58,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 684 flow [2022-12-13 18:54:58,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 99 transitions, 683 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:54:58,611 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 455 flow [2022-12-13 18:54:58,611 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=455, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2022-12-13 18:54:58,611 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2022-12-13 18:54:58,611 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 455 flow [2022-12-13 18:54:58,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 178.33333333333334) internal successors, (1070), 6 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:58,612 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:54:58,612 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:58,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:58,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:58,814 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:54:58,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:58,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1583375384, now seen corresponding path program 1 times [2022-12-13 18:54:58,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:54:58,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687540781] [2022-12-13 18:54:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:58,816 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 18:54:58,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:54:58,819 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:58,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:54:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:58,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:54:58,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:58,939 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 18:54:58,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:54:58,939 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:54:58,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687540781] [2022-12-13 18:54:58,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687540781] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:58,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:58,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:54:58,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990825982] [2022-12-13 18:54:58,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:58,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:54:58,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:54:58,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:54:58,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:54:59,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 422 [2022-12-13 18:54:59,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 455 flow. Second operand has 5 states, 5 states have (on average 180.6) internal successors, (903), 5 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:54:59,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:54:59,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 422 [2022-12-13 18:54:59,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:55:03,392 INFO L130 PetriNetUnfolder]: 37254/48102 cut-off events. [2022-12-13 18:55:03,392 INFO L131 PetriNetUnfolder]: For 7012/7054 co-relation queries the response was YES. [2022-12-13 18:55:03,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111224 conditions, 48102 events. 37254/48102 cut-off events. For 7012/7054 co-relation queries the response was YES. Maximal size of possible extension queue 2268. Compared 277769 event pairs, 20322 based on Foata normal form. 42/23186 useless extension candidates. Maximal degree in co-relation 111192. Up to 47555 conditions per place. [2022-12-13 18:55:03,722 INFO L137 encePairwiseOnDemand]: 412/422 looper letters, 90 selfloop transitions, 16 changer transitions 0/109 dead transitions. [2022-12-13 18:55:03,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 754 flow [2022-12-13 18:55:03,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:55:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:55:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 974 transitions. [2022-12-13 18:55:03,725 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46161137440758293 [2022-12-13 18:55:03,725 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 974 transitions. [2022-12-13 18:55:03,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 974 transitions. [2022-12-13 18:55:03,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:55:03,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 974 transitions. [2022-12-13 18:55:03,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 194.8) internal successors, (974), 5 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:03,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:03,730 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:03,731 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 455 flow. Second operand 5 states and 974 transitions. [2022-12-13 18:55:03,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 754 flow [2022-12-13 18:55:03,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 737 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 18:55:03,742 INFO L231 Difference]: Finished difference. Result has 81 places, 76 transitions, 491 flow [2022-12-13 18:55:03,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=491, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2022-12-13 18:55:03,742 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 23 predicate places. [2022-12-13 18:55:03,742 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 491 flow [2022-12-13 18:55:03,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 180.6) internal successors, (903), 5 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:03,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:55:03,743 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:55:03,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 18:55:03,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:55:03,945 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:55:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:55:03,946 INFO L85 PathProgramCache]: Analyzing trace with hash -271369951, now seen corresponding path program 1 times [2022-12-13 18:55:03,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:55:03,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483276064] [2022-12-13 18:55:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:55:03,949 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 18:55:03,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:55:03,952 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:55:03,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:55:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:55:04,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 18:55:04,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:55:04,193 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:55:04,193 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:55:04,302 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:55:04,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:55:04,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:55:04,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:55:04,427 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:55:04,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:55:04,510 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 18:55:04,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:55:06,971 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 18:55:06,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:55:06,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483276064] [2022-12-13 18:55:06,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483276064] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:55:06,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:55:06,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 18:55:06,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141595423] [2022-12-13 18:55:06,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:55:06,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 18:55:06,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:55:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 18:55:06,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:55:11,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 422 [2022-12-13 18:55:11,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 491 flow. Second operand has 10 states, 10 states have (on average 161.6) internal successors, (1616), 10 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:11,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:55:11,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 422 [2022-12-13 18:55:11,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:55:35,632 INFO L130 PetriNetUnfolder]: 125124/168702 cut-off events. [2022-12-13 18:55:35,632 INFO L131 PetriNetUnfolder]: For 23805/27090 co-relation queries the response was YES. [2022-12-13 18:55:36,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399935 conditions, 168702 events. 125124/168702 cut-off events. For 23805/27090 co-relation queries the response was YES. Maximal size of possible extension queue 7903. Compared 1252788 event pairs, 54757 based on Foata normal form. 3285/93345 useless extension candidates. Maximal degree in co-relation 399901. Up to 25369 conditions per place. [2022-12-13 18:55:36,702 INFO L137 encePairwiseOnDemand]: 412/422 looper letters, 559 selfloop transitions, 54 changer transitions 0/616 dead transitions. [2022-12-13 18:55:36,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 616 transitions, 3431 flow [2022-12-13 18:55:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 18:55:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 18:55:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4890 transitions. [2022-12-13 18:55:36,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4291732490784623 [2022-12-13 18:55:36,711 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4890 transitions. [2022-12-13 18:55:36,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4890 transitions. [2022-12-13 18:55:36,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:55:36,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4890 transitions. [2022-12-13 18:55:36,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 181.11111111111111) internal successors, (4890), 27 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:36,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 422.0) internal successors, (11816), 28 states have internal predecessors, (11816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:36,729 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 422.0) internal successors, (11816), 28 states have internal predecessors, (11816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:36,729 INFO L175 Difference]: Start difference. First operand has 81 places, 76 transitions, 491 flow. Second operand 27 states and 4890 transitions. [2022-12-13 18:55:36,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 616 transitions, 3431 flow [2022-12-13 18:55:36,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 616 transitions, 3397 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:55:36,939 INFO L231 Difference]: Finished difference. Result has 111 places, 108 transitions, 823 flow [2022-12-13 18:55:36,939 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=823, PETRI_PLACES=111, PETRI_TRANSITIONS=108} [2022-12-13 18:55:36,940 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 53 predicate places. [2022-12-13 18:55:36,940 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 108 transitions, 823 flow [2022-12-13 18:55:36,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 161.6) internal successors, (1616), 10 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:36,940 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:55:36,940 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:55:36,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:55:37,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:55:37,141 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:55:37,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:55:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash -271369952, now seen corresponding path program 1 times [2022-12-13 18:55:37,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:55:37,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659105461] [2022-12-13 18:55:37,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:55:37,143 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 18:55:37,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:55:37,145 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:55:37,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:55:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:55:37,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:55:37,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:55:37,323 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:55:37,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:55:37,350 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 18:55:37,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 18:55:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:55:37,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:55:37,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:55:37,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659105461] [2022-12-13 18:55:37,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659105461] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:55:37,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:55:37,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:55:37,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918962870] [2022-12-13 18:55:37,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:55:37,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:55:37,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:55:37,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:55:37,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:55:37,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 422 [2022-12-13 18:55:37,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 108 transitions, 823 flow. Second operand has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:37,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:55:37,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 422 [2022-12-13 18:55:37,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:55:47,497 INFO L130 PetriNetUnfolder]: 79845/107200 cut-off events. [2022-12-13 18:55:47,497 INFO L131 PetriNetUnfolder]: For 227098/232149 co-relation queries the response was YES. [2022-12-13 18:55:47,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321059 conditions, 107200 events. 79845/107200 cut-off events. For 227098/232149 co-relation queries the response was YES. Maximal size of possible extension queue 5108. Compared 762102 event pairs, 48738 based on Foata normal form. 13214/75313 useless extension candidates. Maximal degree in co-relation 321019. Up to 106545 conditions per place. [2022-12-13 18:55:48,374 INFO L137 encePairwiseOnDemand]: 418/422 looper letters, 79 selfloop transitions, 12 changer transitions 0/106 dead transitions. [2022-12-13 18:55:48,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 106 transitions, 997 flow [2022-12-13 18:55:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:55:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:55:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 740 transitions. [2022-12-13 18:55:48,377 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43838862559241704 [2022-12-13 18:55:48,377 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 740 transitions. [2022-12-13 18:55:48,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 740 transitions. [2022-12-13 18:55:48,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:55:48,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 740 transitions. [2022-12-13 18:55:48,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:48,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:48,382 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:48,382 INFO L175 Difference]: Start difference. First operand has 111 places, 108 transitions, 823 flow. Second operand 4 states and 740 transitions. [2022-12-13 18:55:48,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 106 transitions, 997 flow [2022-12-13 18:55:48,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 106 transitions, 902 flow, removed 27 selfloop flow, removed 4 redundant places. [2022-12-13 18:55:48,979 INFO L231 Difference]: Finished difference. Result has 108 places, 106 transitions, 744 flow [2022-12-13 18:55:48,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=744, PETRI_PLACES=108, PETRI_TRANSITIONS=106} [2022-12-13 18:55:48,979 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 50 predicate places. [2022-12-13 18:55:48,979 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 106 transitions, 744 flow [2022-12-13 18:55:48,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:48,980 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:55:48,980 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:55:48,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:55:49,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:55:49,182 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:55:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:55:49,183 INFO L85 PathProgramCache]: Analyzing trace with hash 177471637, now seen corresponding path program 1 times [2022-12-13 18:55:49,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:55:49,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941233137] [2022-12-13 18:55:49,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:55:49,185 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 18:55:49,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:55:49,189 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:55:49,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:55:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:55:49,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 18:55:49,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:55:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:55:49,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:55:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:55:49,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:55:49,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941233137] [2022-12-13 18:55:49,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941233137] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:55:49,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:55:49,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:55:49,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708062736] [2022-12-13 18:55:49,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:55:49,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:55:49,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:55:49,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:55:49,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:55:50,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 422 [2022-12-13 18:55:50,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 106 transitions, 744 flow. Second operand has 12 states, 12 states have (on average 175.5) internal successors, (2106), 12 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:50,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:55:50,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 422 [2022-12-13 18:55:50,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:55:58,086 INFO L130 PetriNetUnfolder]: 54841/74010 cut-off events. [2022-12-13 18:55:58,086 INFO L131 PetriNetUnfolder]: For 84704/86457 co-relation queries the response was YES. [2022-12-13 18:55:58,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206136 conditions, 74010 events. 54841/74010 cut-off events. For 84704/86457 co-relation queries the response was YES. Maximal size of possible extension queue 3381. Compared 504970 event pairs, 16520 based on Foata normal form. 2691/46361 useless extension candidates. Maximal degree in co-relation 206097. Up to 34226 conditions per place. [2022-12-13 18:55:58,598 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 179 selfloop transitions, 41 changer transitions 0/223 dead transitions. [2022-12-13 18:55:58,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 223 transitions, 1467 flow [2022-12-13 18:55:58,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 18:55:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 18:55:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2611 transitions. [2022-12-13 18:55:58,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4419431279620853 [2022-12-13 18:55:58,604 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2611 transitions. [2022-12-13 18:55:58,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2611 transitions. [2022-12-13 18:55:58,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:55:58,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2611 transitions. [2022-12-13 18:55:58,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.5) internal successors, (2611), 14 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:58,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 422.0) internal successors, (6330), 15 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:58,612 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 422.0) internal successors, (6330), 15 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:55:58,612 INFO L175 Difference]: Start difference. First operand has 108 places, 106 transitions, 744 flow. Second operand 14 states and 2611 transitions. [2022-12-13 18:55:58,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 223 transitions, 1467 flow [2022-12-13 18:56:02,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 223 transitions, 1432 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-12-13 18:56:02,089 INFO L231 Difference]: Finished difference. Result has 114 places, 99 transitions, 792 flow [2022-12-13 18:56:02,089 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=792, PETRI_PLACES=114, PETRI_TRANSITIONS=99} [2022-12-13 18:56:02,089 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 56 predicate places. [2022-12-13 18:56:02,090 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 99 transitions, 792 flow [2022-12-13 18:56:02,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 175.5) internal successors, (2106), 12 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:02,090 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:02,090 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:02,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 18:56:02,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:02,292 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:56:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:02,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1211337987, now seen corresponding path program 1 times [2022-12-13 18:56:02,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:56:02,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877879314] [2022-12-13 18:56:02,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:02,295 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 18:56:02,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:56:02,298 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:02,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:02,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:56:02,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:02,395 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 18:56:02,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:56:02,396 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:56:02,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877879314] [2022-12-13 18:56:02,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877879314] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:02,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:56:02,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:56:02,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936636721] [2022-12-13 18:56:02,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:02,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:56:02,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:56:02,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:56:02,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:56:02,415 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 422 [2022-12-13 18:56:02,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 99 transitions, 792 flow. Second operand has 4 states, 4 states have (on average 190.5) internal successors, (762), 4 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:02,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:02,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 422 [2022-12-13 18:56:02,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:07,169 INFO L130 PetriNetUnfolder]: 33826/47750 cut-off events. [2022-12-13 18:56:07,169 INFO L131 PetriNetUnfolder]: For 214470/218168 co-relation queries the response was YES. [2022-12-13 18:56:07,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155637 conditions, 47750 events. 33826/47750 cut-off events. For 214470/218168 co-relation queries the response was YES. Maximal size of possible extension queue 2168. Compared 329781 event pairs, 5981 based on Foata normal form. 3698/40089 useless extension candidates. Maximal degree in co-relation 155596. Up to 33423 conditions per place. [2022-12-13 18:56:07,615 INFO L137 encePairwiseOnDemand]: 416/422 looper letters, 129 selfloop transitions, 4 changer transitions 0/144 dead transitions. [2022-12-13 18:56:07,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 144 transitions, 1290 flow [2022-12-13 18:56:07,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:56:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:56:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 823 transitions. [2022-12-13 18:56:07,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48755924170616116 [2022-12-13 18:56:07,618 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 823 transitions. [2022-12-13 18:56:07,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 823 transitions. [2022-12-13 18:56:07,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:07,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 823 transitions. [2022-12-13 18:56:07,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:07,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:07,621 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:07,621 INFO L175 Difference]: Start difference. First operand has 114 places, 99 transitions, 792 flow. Second operand 4 states and 823 transitions. [2022-12-13 18:56:07,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 144 transitions, 1290 flow [2022-12-13 18:56:07,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 144 transitions, 1259 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 18:56:07,745 INFO L231 Difference]: Finished difference. Result has 116 places, 101 transitions, 788 flow [2022-12-13 18:56:07,745 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=788, PETRI_PLACES=116, PETRI_TRANSITIONS=101} [2022-12-13 18:56:07,746 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 58 predicate places. [2022-12-13 18:56:07,746 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 101 transitions, 788 flow [2022-12-13 18:56:07,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 190.5) internal successors, (762), 4 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:07,746 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:07,746 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:07,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-12-13 18:56:07,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:07,948 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:56:07,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:07,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1213247908, now seen corresponding path program 1 times [2022-12-13 18:56:07,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:56:07,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931719438] [2022-12-13 18:56:07,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:07,950 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 18:56:07,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:56:07,953 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:07,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 18:56:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:08,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 18:56:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:56:08,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:56:08,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:56:08,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931719438] [2022-12-13 18:56:08,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931719438] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:08,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:56:08,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:56:08,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186945848] [2022-12-13 18:56:08,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:08,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:56:08,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:56:08,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:56:08,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:56:08,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 422 [2022-12-13 18:56:08,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 101 transitions, 788 flow. Second operand has 4 states, 4 states have (on average 180.25) internal successors, (721), 4 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:08,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:08,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 422 [2022-12-13 18:56:08,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:12,269 INFO L130 PetriNetUnfolder]: 24422/34912 cut-off events. [2022-12-13 18:56:12,269 INFO L131 PetriNetUnfolder]: For 143640/146937 co-relation queries the response was YES. [2022-12-13 18:56:12,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117839 conditions, 34912 events. 24422/34912 cut-off events. For 143640/146937 co-relation queries the response was YES. Maximal size of possible extension queue 1603. Compared 238637 event pairs, 15932 based on Foata normal form. 3297/31782 useless extension candidates. Maximal degree in co-relation 117795. Up to 34423 conditions per place. [2022-12-13 18:56:12,543 INFO L137 encePairwiseOnDemand]: 418/422 looper letters, 75 selfloop transitions, 11 changer transitions 0/99 dead transitions. [2022-12-13 18:56:12,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 99 transitions, 952 flow [2022-12-13 18:56:12,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:56:12,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:56:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 746 transitions. [2022-12-13 18:56:12,546 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4419431279620853 [2022-12-13 18:56:12,546 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 746 transitions. [2022-12-13 18:56:12,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 746 transitions. [2022-12-13 18:56:12,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:12,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 746 transitions. [2022-12-13 18:56:12,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.5) internal successors, (746), 4 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:12,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:12,548 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:12,548 INFO L175 Difference]: Start difference. First operand has 116 places, 101 transitions, 788 flow. Second operand 4 states and 746 transitions. [2022-12-13 18:56:12,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 99 transitions, 952 flow [2022-12-13 18:56:12,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 99 transitions, 947 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 18:56:12,645 INFO L231 Difference]: Finished difference. Result has 116 places, 99 transitions, 797 flow [2022-12-13 18:56:12,645 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=797, PETRI_PLACES=116, PETRI_TRANSITIONS=99} [2022-12-13 18:56:12,645 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 58 predicate places. [2022-12-13 18:56:12,645 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 99 transitions, 797 flow [2022-12-13 18:56:12,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.25) internal successors, (721), 4 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:12,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:12,645 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:12,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:12,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:12,847 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:56:12,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:12,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1213247907, now seen corresponding path program 1 times [2022-12-13 18:56:12,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:56:12,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911639571] [2022-12-13 18:56:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:12,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:56:12,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:56:12,852 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:12,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:13,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 18:56:13,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:13,158 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:56:13,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:56:13,236 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:56:13,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:56:13,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:56:13,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:56:13,337 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:56:13,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:56:13,419 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 18:56:13,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:56:15,823 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 18:56:15,823 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:56:15,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911639571] [2022-12-13 18:56:15,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911639571] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:56:15,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:56:15,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 18:56:15,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111121168] [2022-12-13 18:56:15,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:56:15,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 18:56:15,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:56:15,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 18:56:15,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:56:20,384 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 422 [2022-12-13 18:56:20,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 99 transitions, 797 flow. Second operand has 10 states, 10 states have (on average 163.0) internal successors, (1630), 10 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:20,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:20,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 422 [2022-12-13 18:56:20,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:33,526 INFO L130 PetriNetUnfolder]: 25845/36662 cut-off events. [2022-12-13 18:56:33,526 INFO L131 PetriNetUnfolder]: For 175073/178216 co-relation queries the response was YES. [2022-12-13 18:56:33,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123899 conditions, 36662 events. 25845/36662 cut-off events. For 175073/178216 co-relation queries the response was YES. Maximal size of possible extension queue 1641. Compared 248126 event pairs, 9120 based on Foata normal form. 3143/33963 useless extension candidates. Maximal degree in co-relation 123854. Up to 7681 conditions per place. [2022-12-13 18:56:33,815 INFO L137 encePairwiseOnDemand]: 410/422 looper letters, 352 selfloop transitions, 73 changer transitions 0/436 dead transitions. [2022-12-13 18:56:33,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 436 transitions, 2923 flow [2022-12-13 18:56:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 18:56:33,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 18:56:33,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4249 transitions. [2022-12-13 18:56:33,820 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4195300157977883 [2022-12-13 18:56:33,820 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4249 transitions. [2022-12-13 18:56:33,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4249 transitions. [2022-12-13 18:56:33,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:33,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4249 transitions. [2022-12-13 18:56:33,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 177.04166666666666) internal successors, (4249), 24 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:33,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 422.0) internal successors, (10550), 25 states have internal predecessors, (10550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:33,833 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 422.0) internal successors, (10550), 25 states have internal predecessors, (10550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:33,833 INFO L175 Difference]: Start difference. First operand has 116 places, 99 transitions, 797 flow. Second operand 24 states and 4249 transitions. [2022-12-13 18:56:33,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 436 transitions, 2923 flow [2022-12-13 18:56:33,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 436 transitions, 2907 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:56:33,944 INFO L231 Difference]: Finished difference. Result has 142 places, 140 transitions, 1184 flow [2022-12-13 18:56:33,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1184, PETRI_PLACES=142, PETRI_TRANSITIONS=140} [2022-12-13 18:56:33,944 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 84 predicate places. [2022-12-13 18:56:33,945 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 140 transitions, 1184 flow [2022-12-13 18:56:33,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.0) internal successors, (1630), 10 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:33,945 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:33,945 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:33,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:34,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:34,147 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:56:34,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:34,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1133190604, now seen corresponding path program 2 times [2022-12-13 18:56:34,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:56:34,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425269413] [2022-12-13 18:56:34,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:56:34,149 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 18:56:34,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:56:34,152 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:34,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:34,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 18:56:34,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:56:34,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:56:34,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:34,371 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:56:34,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:56:34,451 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:56:34,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:56:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:56:34,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:56:34,565 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:56:34,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:56:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 18:56:34,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:56:34,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:56:34,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425269413] [2022-12-13 18:56:34,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425269413] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:34,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:56:34,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:56:34,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220817320] [2022-12-13 18:56:34,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:34,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:56:34,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:56:34,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:56:34,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:56:35,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 422 [2022-12-13 18:56:35,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 140 transitions, 1184 flow. Second operand has 5 states, 5 states have (on average 173.6) internal successors, (868), 5 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:35,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:35,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 422 [2022-12-13 18:56:35,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:40,082 INFO L130 PetriNetUnfolder]: 29780/42895 cut-off events. [2022-12-13 18:56:40,083 INFO L131 PetriNetUnfolder]: For 147022/150977 co-relation queries the response was YES. [2022-12-13 18:56:40,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150356 conditions, 42895 events. 29780/42895 cut-off events. For 147022/150977 co-relation queries the response was YES. Maximal size of possible extension queue 1593. Compared 291287 event pairs, 13095 based on Foata normal form. 3871/41493 useless extension candidates. Maximal degree in co-relation 150306. Up to 27293 conditions per place. [2022-12-13 18:56:40,373 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 161 selfloop transitions, 27 changer transitions 0/199 dead transitions. [2022-12-13 18:56:40,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 199 transitions, 1914 flow [2022-12-13 18:56:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:56:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:56:40,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 917 transitions. [2022-12-13 18:56:40,375 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43459715639810426 [2022-12-13 18:56:40,375 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 917 transitions. [2022-12-13 18:56:40,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 917 transitions. [2022-12-13 18:56:40,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:40,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 917 transitions. [2022-12-13 18:56:40,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 183.4) internal successors, (917), 5 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:40,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:40,378 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:40,378 INFO L175 Difference]: Start difference. First operand has 142 places, 140 transitions, 1184 flow. Second operand 5 states and 917 transitions. [2022-12-13 18:56:40,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 199 transitions, 1914 flow [2022-12-13 18:56:41,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 199 transitions, 1810 flow, removed 29 selfloop flow, removed 7 redundant places. [2022-12-13 18:56:41,114 INFO L231 Difference]: Finished difference. Result has 140 places, 141 transitions, 1187 flow [2022-12-13 18:56:41,114 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1187, PETRI_PLACES=140, PETRI_TRANSITIONS=141} [2022-12-13 18:56:41,114 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 82 predicate places. [2022-12-13 18:56:41,114 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 141 transitions, 1187 flow [2022-12-13 18:56:41,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.6) internal successors, (868), 5 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:41,114 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:41,114 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:41,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 18:56:41,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:41,316 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:56:41,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:41,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1570816673, now seen corresponding path program 2 times [2022-12-13 18:56:41,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:56:41,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489924116] [2022-12-13 18:56:41,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:56:41,318 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 18:56:41,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:56:41,321 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:56:41,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 18:56:41,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:56:41,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:56:41,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 18:56:41,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:41,647 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 18:56:41,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 18:56:41,746 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:56:41,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:56:41,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:56:41,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:56:41,836 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:56:41,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:56:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:56:41,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:56:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:56:42,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:56:42,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489924116] [2022-12-13 18:56:42,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489924116] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:56:42,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:56:42,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 18:56:42,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691206536] [2022-12-13 18:56:42,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:56:42,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 18:56:42,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:56:42,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 18:56:42,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-13 18:56:45,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:56:47,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:56:52,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:56:55,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:56:57,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:56:59,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:57:01,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:57:03,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 422 [2022-12-13 18:57:03,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 141 transitions, 1187 flow. Second operand has 14 states, 14 states have (on average 161.42857142857142) internal successors, (2260), 14 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:03,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:57:03,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 422 [2022-12-13 18:57:03,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:57:11,726 INFO L130 PetriNetUnfolder]: 39278/56811 cut-off events. [2022-12-13 18:57:11,726 INFO L131 PetriNetUnfolder]: For 211163/216430 co-relation queries the response was YES. [2022-12-13 18:57:12,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207033 conditions, 56811 events. 39278/56811 cut-off events. For 211163/216430 co-relation queries the response was YES. Maximal size of possible extension queue 2091. Compared 405750 event pairs, 12317 based on Foata normal form. 5437/55362 useless extension candidates. Maximal degree in co-relation 206983. Up to 23512 conditions per place. [2022-12-13 18:57:12,188 INFO L137 encePairwiseOnDemand]: 415/422 looper letters, 307 selfloop transitions, 32 changer transitions 0/350 dead transitions. [2022-12-13 18:57:12,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 350 transitions, 2767 flow [2022-12-13 18:57:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 18:57:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 18:57:12,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2293 transitions. [2022-12-13 18:57:12,192 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4179730222384251 [2022-12-13 18:57:12,192 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2293 transitions. [2022-12-13 18:57:12,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2293 transitions. [2022-12-13 18:57:12,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:12,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2293 transitions. [2022-12-13 18:57:12,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 176.3846153846154) internal successors, (2293), 13 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:12,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 422.0) internal successors, (5908), 14 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:12,197 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 422.0) internal successors, (5908), 14 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:12,198 INFO L175 Difference]: Start difference. First operand has 140 places, 141 transitions, 1187 flow. Second operand 13 states and 2293 transitions. [2022-12-13 18:57:12,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 350 transitions, 2767 flow [2022-12-13 18:57:14,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 350 transitions, 2691 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-12-13 18:57:14,196 INFO L231 Difference]: Finished difference. Result has 151 places, 143 transitions, 1227 flow [2022-12-13 18:57:14,197 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1227, PETRI_PLACES=151, PETRI_TRANSITIONS=143} [2022-12-13 18:57:14,197 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 93 predicate places. [2022-12-13 18:57:14,197 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 143 transitions, 1227 flow [2022-12-13 18:57:14,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 161.42857142857142) internal successors, (2260), 14 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:14,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:57:14,197 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:14,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-13 18:57:14,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:57:14,399 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:57:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:14,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1995126006, now seen corresponding path program 1 times [2022-12-13 18:57:14,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:57:14,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933203878] [2022-12-13 18:57:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:57:14,402 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 18:57:14,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:57:14,404 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:57:14,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 18:57:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:57:14,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 18:57:14,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:57:14,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:57:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:57:14,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:57:14,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933203878] [2022-12-13 18:57:14,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933203878] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:57:14,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:57:14,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:57:14,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464081544] [2022-12-13 18:57:14,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:57:14,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:57:14,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:57:14,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:57:14,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:57:15,642 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 422 [2022-12-13 18:57:15,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 143 transitions, 1227 flow. Second operand has 12 states, 12 states have (on average 176.0) internal successors, (2112), 12 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:15,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:57:15,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 422 [2022-12-13 18:57:15,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:57:22,915 INFO L130 PetriNetUnfolder]: 37386/53965 cut-off events. [2022-12-13 18:57:22,916 INFO L131 PetriNetUnfolder]: For 131604/135638 co-relation queries the response was YES. [2022-12-13 18:57:23,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177104 conditions, 53965 events. 37386/53965 cut-off events. For 131604/135638 co-relation queries the response was YES. Maximal size of possible extension queue 2193. Compared 379636 event pairs, 19607 based on Foata normal form. 4538/50203 useless extension candidates. Maximal degree in co-relation 177052. Up to 39028 conditions per place. [2022-12-13 18:57:23,323 INFO L137 encePairwiseOnDemand]: 409/422 looper letters, 169 selfloop transitions, 44 changer transitions 0/225 dead transitions. [2022-12-13 18:57:23,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 225 transitions, 1951 flow [2022-12-13 18:57:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 18:57:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 18:57:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2572 transitions. [2022-12-13 18:57:23,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43534190927555855 [2022-12-13 18:57:23,327 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2572 transitions. [2022-12-13 18:57:23,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2572 transitions. [2022-12-13 18:57:23,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:23,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2572 transitions. [2022-12-13 18:57:23,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 183.71428571428572) internal successors, (2572), 14 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:23,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 422.0) internal successors, (6330), 15 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:23,333 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 422.0) internal successors, (6330), 15 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:23,333 INFO L175 Difference]: Start difference. First operand has 151 places, 143 transitions, 1227 flow. Second operand 14 states and 2572 transitions. [2022-12-13 18:57:23,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 225 transitions, 1951 flow [2022-12-13 18:57:23,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 225 transitions, 1864 flow, removed 15 selfloop flow, removed 6 redundant places. [2022-12-13 18:57:23,726 INFO L231 Difference]: Finished difference. Result has 158 places, 137 transitions, 1238 flow [2022-12-13 18:57:23,726 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1238, PETRI_PLACES=158, PETRI_TRANSITIONS=137} [2022-12-13 18:57:23,726 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 100 predicate places. [2022-12-13 18:57:23,726 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 137 transitions, 1238 flow [2022-12-13 18:57:23,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.0) internal successors, (2112), 12 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:23,727 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:57:23,727 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:23,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-13 18:57:23,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:57:23,928 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:57:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:23,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1450671081, now seen corresponding path program 3 times [2022-12-13 18:57:23,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:57:23,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353114819] [2022-12-13 18:57:23,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:57:23,931 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 18:57:23,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:57:23,933 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:57:23,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 18:57:24,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 18:57:24,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:57:24,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 18:57:24,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:24,173 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:57:24,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:57:24,269 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:57:24,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:57:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:57:24,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-12-13 18:57:24,379 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:57:24,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:57:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:57:24,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:57:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:57:25,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:57:25,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353114819] [2022-12-13 18:57:25,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353114819] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:57:25,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:57:25,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 18:57:25,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412214084] [2022-12-13 18:57:25,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:57:25,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 18:57:25,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:57:25,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 18:57:25,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-12-13 18:57:37,512 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 422 [2022-12-13 18:57:37,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 137 transitions, 1238 flow. Second operand has 16 states, 16 states have (on average 162.375) internal successors, (2598), 16 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:37,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:57:37,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 422 [2022-12-13 18:57:37,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:57:52,252 INFO L130 PetriNetUnfolder]: 49686/69157 cut-off events. [2022-12-13 18:57:52,252 INFO L131 PetriNetUnfolder]: For 146269/152456 co-relation queries the response was YES. [2022-12-13 18:57:52,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238469 conditions, 69157 events. 49686/69157 cut-off events. For 146269/152456 co-relation queries the response was YES. Maximal size of possible extension queue 2210. Compared 465679 event pairs, 6847 based on Foata normal form. 7643/67853 useless extension candidates. Maximal degree in co-relation 238418. Up to 18448 conditions per place. [2022-12-13 18:57:52,785 INFO L137 encePairwiseOnDemand]: 414/422 looper letters, 437 selfloop transitions, 43 changer transitions 21/511 dead transitions. [2022-12-13 18:57:52,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 511 transitions, 4062 flow [2022-12-13 18:57:52,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 18:57:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 18:57:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4180 transitions. [2022-12-13 18:57:52,791 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4127172195892575 [2022-12-13 18:57:52,791 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4180 transitions. [2022-12-13 18:57:52,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4180 transitions. [2022-12-13 18:57:52,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:52,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4180 transitions. [2022-12-13 18:57:52,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 174.16666666666666) internal successors, (4180), 24 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:52,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 422.0) internal successors, (10550), 25 states have internal predecessors, (10550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:52,801 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 422.0) internal successors, (10550), 25 states have internal predecessors, (10550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:52,801 INFO L175 Difference]: Start difference. First operand has 158 places, 137 transitions, 1238 flow. Second operand 24 states and 4180 transitions. [2022-12-13 18:57:52,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 511 transitions, 4062 flow [2022-12-13 18:57:53,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 511 transitions, 3979 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-12-13 18:57:53,568 INFO L231 Difference]: Finished difference. Result has 179 places, 141 transitions, 1290 flow [2022-12-13 18:57:53,568 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1290, PETRI_PLACES=179, PETRI_TRANSITIONS=141} [2022-12-13 18:57:53,568 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 121 predicate places. [2022-12-13 18:57:53,568 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 141 transitions, 1290 flow [2022-12-13 18:57:53,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 162.375) internal successors, (2598), 16 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:53,569 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:57:53,569 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 18:57:53,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-13 18:57:53,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:57:53,771 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:57:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash 292946529, now seen corresponding path program 3 times [2022-12-13 18:57:53,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:57:53,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069954794] [2022-12-13 18:57:53,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:57:53,773 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 18:57:53,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:57:53,776 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:57:53,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 18:57:53,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 18:57:53,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:57:53,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 18:57:53,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:54,042 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:57:54,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:57:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:54,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:57:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:57:56,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:57:56,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069954794] [2022-12-13 18:57:56,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069954794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:57:56,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:57:56,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 18:57:56,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800447432] [2022-12-13 18:57:56,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:57:56,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 18:57:56,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:57:56,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 18:57:56,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 18:58:15,251 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 422 [2022-12-13 18:58:15,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 141 transitions, 1290 flow. Second operand has 24 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:58:15,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:58:15,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 422 [2022-12-13 18:58:15,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:58:26,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:58:28,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:58:30,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:58:32,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:58:34,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:58:36,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:58:38,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:58:40,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:58:42,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:58:44,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:59:02,924 INFO L130 PetriNetUnfolder]: 61699/86074 cut-off events. [2022-12-13 18:59:02,924 INFO L131 PetriNetUnfolder]: For 363082/376969 co-relation queries the response was YES. [2022-12-13 18:59:03,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336818 conditions, 86074 events. 61699/86074 cut-off events. For 363082/376969 co-relation queries the response was YES. Maximal size of possible extension queue 2555. Compared 578276 event pairs, 40854 based on Foata normal form. 12055/88959 useless extension candidates. Maximal degree in co-relation 336763. Up to 13757 conditions per place. [2022-12-13 18:59:03,731 INFO L137 encePairwiseOnDemand]: 415/422 looper letters, 562 selfloop transitions, 65 changer transitions 0/645 dead transitions. [2022-12-13 18:59:03,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 645 transitions, 5817 flow [2022-12-13 18:59:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 18:59:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 18:59:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4558 transitions. [2022-12-13 18:59:03,738 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45003949447077407 [2022-12-13 18:59:03,738 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4558 transitions. [2022-12-13 18:59:03,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4558 transitions. [2022-12-13 18:59:03,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:59:03,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4558 transitions. [2022-12-13 18:59:03,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 189.91666666666666) internal successors, (4558), 24 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:03,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 422.0) internal successors, (10550), 25 states have internal predecessors, (10550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:03,750 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 422.0) internal successors, (10550), 25 states have internal predecessors, (10550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:03,750 INFO L175 Difference]: Start difference. First operand has 179 places, 141 transitions, 1290 flow. Second operand 24 states and 4558 transitions. [2022-12-13 18:59:03,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 645 transitions, 5817 flow [2022-12-13 18:59:05,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 645 transitions, 5284 flow, removed 162 selfloop flow, removed 19 redundant places. [2022-12-13 18:59:05,018 INFO L231 Difference]: Finished difference. Result has 192 places, 170 transitions, 1669 flow [2022-12-13 18:59:05,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1669, PETRI_PLACES=192, PETRI_TRANSITIONS=170} [2022-12-13 18:59:05,019 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 134 predicate places. [2022-12-13 18:59:05,019 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 170 transitions, 1669 flow [2022-12-13 18:59:05,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:05,019 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:59:05,020 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:59:05,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-13 18:59:05,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:59:05,221 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:59:05,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:59:05,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1932288502, now seen corresponding path program 2 times [2022-12-13 18:59:05,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:59:05,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375590769] [2022-12-13 18:59:05,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:59:05,223 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 18:59:05,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:59:05,226 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:59:05,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-13 18:59:05,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 18:59:05,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:59:05,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:59:05,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:59:05,413 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:59:05,414 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:59:05,502 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:59:05,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:59:05,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:59:05,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:59:05,598 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:59:05,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:59:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 18:59:05,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:59:05,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:59:05,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375590769] [2022-12-13 18:59:05,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375590769] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:59:05,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:59:05,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:59:05,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887755398] [2022-12-13 18:59:05,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:59:05,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:59:05,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:59:05,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:59:05,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:59:06,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 422 [2022-12-13 18:59:06,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 170 transitions, 1669 flow. Second operand has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:06,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:59:06,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 422 [2022-12-13 18:59:06,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:59:17,623 INFO L130 PetriNetUnfolder]: 66272/91675 cut-off events. [2022-12-13 18:59:17,623 INFO L131 PetriNetUnfolder]: For 290211/299592 co-relation queries the response was YES. [2022-12-13 18:59:18,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319340 conditions, 91675 events. 66272/91675 cut-off events. For 290211/299592 co-relation queries the response was YES. Maximal size of possible extension queue 2552. Compared 599964 event pairs, 31656 based on Foata normal form. 10409/91999 useless extension candidates. Maximal degree in co-relation 319275. Up to 66640 conditions per place. [2022-12-13 18:59:18,575 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 148 selfloop transitions, 46 changer transitions 0/204 dead transitions. [2022-12-13 18:59:18,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 204 transitions, 2233 flow [2022-12-13 18:59:18,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:59:18,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:59:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 911 transitions. [2022-12-13 18:59:18,578 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4317535545023697 [2022-12-13 18:59:18,578 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 911 transitions. [2022-12-13 18:59:18,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 911 transitions. [2022-12-13 18:59:18,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:59:18,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 911 transitions. [2022-12-13 18:59:18,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 182.2) internal successors, (911), 5 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:18,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:18,581 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:18,581 INFO L175 Difference]: Start difference. First operand has 192 places, 170 transitions, 1669 flow. Second operand 5 states and 911 transitions. [2022-12-13 18:59:18,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 204 transitions, 2233 flow [2022-12-13 18:59:20,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 204 transitions, 2077 flow, removed 36 selfloop flow, removed 10 redundant places. [2022-12-13 18:59:20,121 INFO L231 Difference]: Finished difference. Result has 187 places, 170 transitions, 1629 flow [2022-12-13 18:59:20,121 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1629, PETRI_PLACES=187, PETRI_TRANSITIONS=170} [2022-12-13 18:59:20,121 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 129 predicate places. [2022-12-13 18:59:20,121 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 170 transitions, 1629 flow [2022-12-13 18:59:20,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:20,122 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:59:20,122 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:59:20,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 18:59:20,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:59:20,323 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 18:59:20,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:59:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash -488485908, now seen corresponding path program 2 times [2022-12-13 18:59:20,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:59:20,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607431637] [2022-12-13 18:59:20,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:59:20,326 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 18:59:20,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:59:20,328 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:59:20,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-13 18:59:20,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:59:20,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:59:20,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 18:59:20,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:59:20,647 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 18:59:20,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 18:59:20,728 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:59:20,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:59:20,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:59:20,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:59:20,811 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:59:20,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:59:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:59:20,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:59:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:59:21,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:59:21,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607431637] [2022-12-13 18:59:21,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607431637] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:59:21,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:59:21,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 18:59:21,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66721091] [2022-12-13 18:59:21,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:59:21,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 18:59:21,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:59:21,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 18:59:21,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-13 18:59:23,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:59:30,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:59:33,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:59:37,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:59:37,932 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 422 [2022-12-13 18:59:37,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 170 transitions, 1629 flow. Second operand has 14 states, 14 states have (on average 164.85714285714286) internal successors, (2308), 14 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:37,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:59:37,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 422 [2022-12-13 18:59:37,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:59:58,046 INFO L130 PetriNetUnfolder]: 98800/137051 cut-off events. [2022-12-13 18:59:58,046 INFO L131 PetriNetUnfolder]: For 484979/498041 co-relation queries the response was YES. [2022-12-13 18:59:59,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481774 conditions, 137051 events. 98800/137051 cut-off events. For 484979/498041 co-relation queries the response was YES. Maximal size of possible extension queue 3642. Compared 942853 event pairs, 20799 based on Foata normal form. 16142/138830 useless extension candidates. Maximal degree in co-relation 481707. Up to 44968 conditions per place. [2022-12-13 18:59:59,597 INFO L137 encePairwiseOnDemand]: 413/422 looper letters, 253 selfloop transitions, 67 changer transitions 3/333 dead transitions. [2022-12-13 18:59:59,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 333 transitions, 2973 flow [2022-12-13 18:59:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 18:59:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 18:59:59,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2454 transitions. [2022-12-13 18:59:59,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41536899119837506 [2022-12-13 18:59:59,602 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2454 transitions. [2022-12-13 18:59:59,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2454 transitions. [2022-12-13 18:59:59,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:59:59,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2454 transitions. [2022-12-13 18:59:59,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 175.28571428571428) internal successors, (2454), 14 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:59,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 422.0) internal successors, (6330), 15 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:59,609 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 422.0) internal successors, (6330), 15 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:59,609 INFO L175 Difference]: Start difference. First operand has 187 places, 170 transitions, 1629 flow. Second operand 14 states and 2454 transitions. [2022-12-13 18:59:59,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 333 transitions, 2973 flow [2022-12-13 19:00:04,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 333 transitions, 2871 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-12-13 19:00:04,737 INFO L231 Difference]: Finished difference. Result has 196 places, 182 transitions, 1787 flow [2022-12-13 19:00:04,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1787, PETRI_PLACES=196, PETRI_TRANSITIONS=182} [2022-12-13 19:00:04,738 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 138 predicate places. [2022-12-13 19:00:04,738 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 182 transitions, 1787 flow [2022-12-13 19:00:04,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 164.85714285714286) internal successors, (2308), 14 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:00:04,738 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:00:04,738 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:00:04,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-13 19:00:04,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:00:04,939 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 19:00:04,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:00:04,940 INFO L85 PathProgramCache]: Analyzing trace with hash -488485906, now seen corresponding path program 1 times [2022-12-13 19:00:04,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:00:04,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148025873] [2022-12-13 19:00:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:00:04,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:00:04,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:00:04,945 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:00:04,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-13 19:00:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:00:05,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:00:05,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:00:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:00:05,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:00:05,506 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 27 treesize of output 23 [2022-12-13 19:00:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:00:05,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:00:05,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148025873] [2022-12-13 19:00:05,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148025873] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:00:05,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:00:05,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 19:00:05,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602901315] [2022-12-13 19:00:05,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:00:05,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 19:00:05,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:00:05,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 19:00:05,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:00:09,896 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 422 [2022-12-13 19:00:09,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 182 transitions, 1787 flow. Second operand has 14 states, 14 states have (on average 174.71428571428572) internal successors, (2446), 14 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:00:09,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:00:09,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 422 [2022-12-13 19:00:09,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:00:30,805 INFO L130 PetriNetUnfolder]: 90793/125964 cut-off events. [2022-12-13 19:00:30,805 INFO L131 PetriNetUnfolder]: For 441560/453732 co-relation queries the response was YES. [2022-12-13 19:00:32,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469406 conditions, 125964 events. 90793/125964 cut-off events. For 441560/453732 co-relation queries the response was YES. Maximal size of possible extension queue 3299. Compared 864986 event pairs, 24791 based on Foata normal form. 15252/127917 useless extension candidates. Maximal degree in co-relation 469339. Up to 44948 conditions per place. [2022-12-13 19:00:32,410 INFO L137 encePairwiseOnDemand]: 413/422 looper letters, 443 selfloop transitions, 90 changer transitions 0/543 dead transitions. [2022-12-13 19:00:32,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 543 transitions, 4637 flow [2022-12-13 19:00:32,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 19:00:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 19:00:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3763 transitions. [2022-12-13 19:00:32,415 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44585308056872036 [2022-12-13 19:00:32,415 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3763 transitions. [2022-12-13 19:00:32,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3763 transitions. [2022-12-13 19:00:32,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:00:32,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3763 transitions. [2022-12-13 19:00:32,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 188.15) internal successors, (3763), 20 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:00:32,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 422.0) internal successors, (8862), 21 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:00:32,424 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 422.0) internal successors, (8862), 21 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:00:32,424 INFO L175 Difference]: Start difference. First operand has 196 places, 182 transitions, 1787 flow. Second operand 20 states and 3763 transitions. [2022-12-13 19:00:32,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 543 transitions, 4637 flow [2022-12-13 19:00:33,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 543 transitions, 4495 flow, removed 15 selfloop flow, removed 7 redundant places. [2022-12-13 19:00:33,893 INFO L231 Difference]: Finished difference. Result has 208 places, 190 transitions, 1927 flow [2022-12-13 19:00:33,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1927, PETRI_PLACES=208, PETRI_TRANSITIONS=190} [2022-12-13 19:00:33,894 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 150 predicate places. [2022-12-13 19:00:33,894 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 190 transitions, 1927 flow [2022-12-13 19:00:33,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 174.71428571428572) internal successors, (2446), 14 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:00:33,894 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:00:33,894 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:00:33,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-12-13 19:00:34,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:00:34,096 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 19:00:34,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:00:34,097 INFO L85 PathProgramCache]: Analyzing trace with hash 202882589, now seen corresponding path program 1 times [2022-12-13 19:00:34,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:00:34,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128080855] [2022-12-13 19:00:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:00:34,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:00:34,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:00:34,101 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:00:34,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-13 19:00:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:00:34,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 19:00:34,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:00:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:00:34,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:00:34,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:00:34,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128080855] [2022-12-13 19:00:34,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128080855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:00:34,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:00:34,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:00:34,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489396115] [2022-12-13 19:00:34,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:00:34,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:00:34,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:00:34,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:00:34,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:00:34,291 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 422 [2022-12-13 19:00:34,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 190 transitions, 1927 flow. Second operand has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:00:34,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:00:34,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 422 [2022-12-13 19:00:34,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:00:55,431 INFO L130 PetriNetUnfolder]: 109857/152056 cut-off events. [2022-12-13 19:00:55,431 INFO L131 PetriNetUnfolder]: For 451439/463432 co-relation queries the response was YES. [2022-12-13 19:00:56,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565568 conditions, 152056 events. 109857/152056 cut-off events. For 451439/463432 co-relation queries the response was YES. Maximal size of possible extension queue 3550. Compared 1030178 event pairs, 49745 based on Foata normal form. 13699/151170 useless extension candidates. Maximal degree in co-relation 565502. Up to 105631 conditions per place. [2022-12-13 19:00:57,092 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 254 selfloop transitions, 42 changer transitions 8/312 dead transitions. [2022-12-13 19:00:57,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 312 transitions, 3297 flow [2022-12-13 19:00:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:00:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:00:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1014 transitions. [2022-12-13 19:00:57,095 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48056872037914694 [2022-12-13 19:00:57,095 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1014 transitions. [2022-12-13 19:00:57,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1014 transitions. [2022-12-13 19:00:57,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:00:57,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1014 transitions. [2022-12-13 19:00:57,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.8) internal successors, (1014), 5 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:00:57,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:00:57,098 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:00:57,098 INFO L175 Difference]: Start difference. First operand has 208 places, 190 transitions, 1927 flow. Second operand 5 states and 1014 transitions. [2022-12-13 19:00:57,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 312 transitions, 3297 flow [2022-12-13 19:01:01,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 312 transitions, 3133 flow, removed 2 selfloop flow, removed 9 redundant places. [2022-12-13 19:01:01,110 INFO L231 Difference]: Finished difference. Result has 205 places, 204 transitions, 2064 flow [2022-12-13 19:01:01,110 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2064, PETRI_PLACES=205, PETRI_TRANSITIONS=204} [2022-12-13 19:01:01,110 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 147 predicate places. [2022-12-13 19:01:01,110 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 204 transitions, 2064 flow [2022-12-13 19:01:01,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:01:01,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:01:01,111 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:01:01,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-13 19:01:01,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:01:01,312 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 19:01:01,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:01:01,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1130574329, now seen corresponding path program 2 times [2022-12-13 19:01:01,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:01:01,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847412080] [2022-12-13 19:01:01,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:01:01,314 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 19:01:01,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:01:01,317 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:01:01,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-13 19:01:01,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:01:01,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:01:01,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 19:01:01,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:01:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:01:01,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:01:01,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:01:01,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847412080] [2022-12-13 19:01:01,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847412080] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:01:01,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:01:01,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:01:01,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15976066] [2022-12-13 19:01:01,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:01:01,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:01:01,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:01:01,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:01:01,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:01:01,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 422 [2022-12-13 19:01:01,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 204 transitions, 2064 flow. Second operand has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:01:01,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:01:01,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 422 [2022-12-13 19:01:01,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:01:33,321 INFO L130 PetriNetUnfolder]: 168923/232506 cut-off events. [2022-12-13 19:01:33,321 INFO L131 PetriNetUnfolder]: For 832220/850137 co-relation queries the response was YES. [2022-12-13 19:01:35,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878560 conditions, 232506 events. 168923/232506 cut-off events. For 832220/850137 co-relation queries the response was YES. Maximal size of possible extension queue 5331. Compared 1627028 event pairs, 60865 based on Foata normal form. 19623/226986 useless extension candidates. Maximal degree in co-relation 878495. Up to 108883 conditions per place. [2022-12-13 19:01:35,906 INFO L137 encePairwiseOnDemand]: 416/422 looper letters, 314 selfloop transitions, 25 changer transitions 12/359 dead transitions. [2022-12-13 19:01:35,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 359 transitions, 3818 flow [2022-12-13 19:01:35,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:01:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:01:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1017 transitions. [2022-12-13 19:01:35,909 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4819905213270142 [2022-12-13 19:01:35,909 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1017 transitions. [2022-12-13 19:01:35,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1017 transitions. [2022-12-13 19:01:35,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:01:35,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1017 transitions. [2022-12-13 19:01:35,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.4) internal successors, (1017), 5 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:01:35,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:01:35,912 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:01:35,912 INFO L175 Difference]: Start difference. First operand has 205 places, 204 transitions, 2064 flow. Second operand 5 states and 1017 transitions. [2022-12-13 19:01:35,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 359 transitions, 3818 flow [2022-12-13 19:01:44,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 359 transitions, 3774 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:01:44,074 INFO L231 Difference]: Finished difference. Result has 210 places, 217 transitions, 2278 flow [2022-12-13 19:01:44,074 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2278, PETRI_PLACES=210, PETRI_TRANSITIONS=217} [2022-12-13 19:01:44,075 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 152 predicate places. [2022-12-13 19:01:44,075 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 217 transitions, 2278 flow [2022-12-13 19:01:44,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:01:44,075 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:01:44,075 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:01:44,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-13 19:01:44,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:01:44,277 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 19:01:44,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:01:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1120275509, now seen corresponding path program 3 times [2022-12-13 19:01:44,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:01:44,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049323998] [2022-12-13 19:01:44,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:01:44,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:01:44,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:01:44,282 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:01:44,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-13 19:01:44,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 19:01:44,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:01:44,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 19:01:44,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:01:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:01:44,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:01:44,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:01:44,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049323998] [2022-12-13 19:01:44,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049323998] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:01:44,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:01:44,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:01:44,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607312871] [2022-12-13 19:01:44,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:01:44,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:01:44,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:01:44,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:01:44,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:01:44,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 422 [2022-12-13 19:01:44,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 217 transitions, 2278 flow. Second operand has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:01:44,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:01:44,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 422 [2022-12-13 19:01:44,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:02:11,171 INFO L130 PetriNetUnfolder]: 139199/192392 cut-off events. [2022-12-13 19:02:11,171 INFO L131 PetriNetUnfolder]: For 789616/804617 co-relation queries the response was YES. [2022-12-13 19:02:12,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758870 conditions, 192392 events. 139199/192392 cut-off events. For 789616/804617 co-relation queries the response was YES. Maximal size of possible extension queue 4359. Compared 1329325 event pairs, 21757 based on Foata normal form. 16707/189106 useless extension candidates. Maximal degree in co-relation 758803. Up to 105733 conditions per place. [2022-12-13 19:02:13,414 INFO L137 encePairwiseOnDemand]: 416/422 looper letters, 260 selfloop transitions, 65 changer transitions 19/350 dead transitions. [2022-12-13 19:02:13,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 350 transitions, 3754 flow [2022-12-13 19:02:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:02:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:02:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1211 transitions. [2022-12-13 19:02:13,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4782780410742496 [2022-12-13 19:02:13,416 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1211 transitions. [2022-12-13 19:02:13,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1211 transitions. [2022-12-13 19:02:13,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:02:13,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1211 transitions. [2022-12-13 19:02:13,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.83333333333334) internal successors, (1211), 6 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:02:13,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:02:13,420 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:02:13,420 INFO L175 Difference]: Start difference. First operand has 210 places, 217 transitions, 2278 flow. Second operand 6 states and 1211 transitions. [2022-12-13 19:02:13,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 350 transitions, 3754 flow [2022-12-13 19:02:21,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 350 transitions, 3721 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-12-13 19:02:21,208 INFO L231 Difference]: Finished difference. Result has 215 places, 213 transitions, 2432 flow [2022-12-13 19:02:21,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2432, PETRI_PLACES=215, PETRI_TRANSITIONS=213} [2022-12-13 19:02:21,208 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 157 predicate places. [2022-12-13 19:02:21,209 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 213 transitions, 2432 flow [2022-12-13 19:02:21,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:02:21,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:02:21,209 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:02:21,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-12-13 19:02:21,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:02:21,411 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 19:02:21,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:02:21,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1283497729, now seen corresponding path program 3 times [2022-12-13 19:02:21,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:02:21,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256774186] [2022-12-13 19:02:21,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:02:21,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:02:21,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:02:21,416 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:02:21,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-13 19:02:21,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 19:02:21,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:02:21,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:02:21,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:02:21,844 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:02:21,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:02:21,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 19:02:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:02:22,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:02:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:02:22,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:02:22,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256774186] [2022-12-13 19:02:22,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256774186] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:02:22,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:02:22,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 19:02:22,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457905001] [2022-12-13 19:02:22,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:02:22,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 19:02:22,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:02:22,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 19:02:22,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-12-13 19:02:26,129 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 422 [2022-12-13 19:02:26,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 213 transitions, 2432 flow. Second operand has 16 states, 16 states have (on average 166.875) internal successors, (2670), 16 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:02:26,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:02:26,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 422 [2022-12-13 19:02:26,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:02:54,964 INFO L130 PetriNetUnfolder]: 133070/183886 cut-off events. [2022-12-13 19:02:54,964 INFO L131 PetriNetUnfolder]: For 840990/858712 co-relation queries the response was YES. [2022-12-13 19:02:56,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738963 conditions, 183886 events. 133070/183886 cut-off events. For 840990/858712 co-relation queries the response was YES. Maximal size of possible extension queue 4839. Compared 1300716 event pairs, 61379 based on Foata normal form. 18785/180351 useless extension candidates. Maximal degree in co-relation 738910. Up to 127054 conditions per place. [2022-12-13 19:02:57,301 INFO L137 encePairwiseOnDemand]: 409/422 looper letters, 332 selfloop transitions, 68 changer transitions 0/410 dead transitions. [2022-12-13 19:02:57,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 410 transitions, 4111 flow [2022-12-13 19:02:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 19:02:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 19:02:57,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3504 transitions. [2022-12-13 19:02:57,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4151658767772512 [2022-12-13 19:02:57,306 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3504 transitions. [2022-12-13 19:02:57,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3504 transitions. [2022-12-13 19:02:57,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:02:57,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3504 transitions. [2022-12-13 19:02:57,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 175.2) internal successors, (3504), 20 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:02:57,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 422.0) internal successors, (8862), 21 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:02:57,315 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 422.0) internal successors, (8862), 21 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:02:57,315 INFO L175 Difference]: Start difference. First operand has 215 places, 213 transitions, 2432 flow. Second operand 20 states and 3504 transitions. [2022-12-13 19:02:57,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 410 transitions, 4111 flow [2022-12-13 19:03:05,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 410 transitions, 3903 flow, removed 24 selfloop flow, removed 12 redundant places. [2022-12-13 19:03:05,911 INFO L231 Difference]: Finished difference. Result has 219 places, 213 transitions, 2443 flow [2022-12-13 19:03:05,911 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2196, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2443, PETRI_PLACES=219, PETRI_TRANSITIONS=213} [2022-12-13 19:03:05,911 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 161 predicate places. [2022-12-13 19:03:05,912 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 213 transitions, 2443 flow [2022-12-13 19:03:05,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 166.875) internal successors, (2670), 16 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:03:05,912 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:03:05,912 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 19:03:05,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-12-13 19:03:06,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:03:06,116 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 19:03:06,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:03:06,117 INFO L85 PathProgramCache]: Analyzing trace with hash -183609833, now seen corresponding path program 4 times [2022-12-13 19:03:06,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:03:06,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87594512] [2022-12-13 19:03:06,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:03:06,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:03:06,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:03:06,121 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:03:06,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-13 19:03:06,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:03:06,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:03:06,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:03:06,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:03:06,399 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:03:06,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:03:06,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 19:03:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:03:06,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:03:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:03:06,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:03:06,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87594512] [2022-12-13 19:03:06,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87594512] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:03:06,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:03:06,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-12-13 19:03:06,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440241629] [2022-12-13 19:03:06,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:03:06,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 19:03:06,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:03:06,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 19:03:06,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-12-13 19:03:10,740 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 422 [2022-12-13 19:03:10,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 213 transitions, 2443 flow. Second operand has 16 states, 16 states have (on average 166.5) internal successors, (2664), 16 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:03:10,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:03:10,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 422 [2022-12-13 19:03:10,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:03:40,270 INFO L130 PetriNetUnfolder]: 134639/186107 cut-off events. [2022-12-13 19:03:40,270 INFO L131 PetriNetUnfolder]: For 769447/782407 co-relation queries the response was YES. [2022-12-13 19:03:41,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757064 conditions, 186107 events. 134639/186107 cut-off events. For 769447/782407 co-relation queries the response was YES. Maximal size of possible extension queue 4973. Compared 1319781 event pairs, 62186 based on Foata normal form. 9413/171181 useless extension candidates. Maximal degree in co-relation 757008. Up to 117349 conditions per place. [2022-12-13 19:03:42,512 INFO L137 encePairwiseOnDemand]: 412/422 looper letters, 392 selfloop transitions, 55 changer transitions 0/467 dead transitions. [2022-12-13 19:03:42,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 467 transitions, 5401 flow [2022-12-13 19:03:42,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 19:03:42,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 19:03:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3511 transitions. [2022-12-13 19:03:42,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4159952606635071 [2022-12-13 19:03:42,517 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3511 transitions. [2022-12-13 19:03:42,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3511 transitions. [2022-12-13 19:03:42,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:03:42,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3511 transitions. [2022-12-13 19:03:42,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 175.55) internal successors, (3511), 20 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:03:42,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 422.0) internal successors, (8862), 21 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:03:42,526 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 422.0) internal successors, (8862), 21 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:03:42,526 INFO L175 Difference]: Start difference. First operand has 219 places, 213 transitions, 2443 flow. Second operand 20 states and 3511 transitions. [2022-12-13 19:03:42,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 467 transitions, 5401 flow [2022-12-13 19:03:55,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 467 transitions, 5222 flow, removed 28 selfloop flow, removed 7 redundant places. [2022-12-13 19:03:55,364 INFO L231 Difference]: Finished difference. Result has 236 places, 219 transitions, 2598 flow [2022-12-13 19:03:55,364 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2598, PETRI_PLACES=236, PETRI_TRANSITIONS=219} [2022-12-13 19:03:55,364 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 178 predicate places. [2022-12-13 19:03:55,365 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 219 transitions, 2598 flow [2022-12-13 19:03:55,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 166.5) internal successors, (2664), 16 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:03:55,365 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:03:55,365 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 19:03:55,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-12-13 19:03:55,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:03:55,566 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 19:03:55,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:03:55,567 INFO L85 PathProgramCache]: Analyzing trace with hash 373079073, now seen corresponding path program 5 times [2022-12-13 19:03:55,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:03:55,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723865879] [2022-12-13 19:03:55,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:03:55,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:03:55,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:03:55,572 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:03:55,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-13 19:03:55,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 19:03:55,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:03:55,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 19:03:55,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:03:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:03:56,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:03:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 19:03:56,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:03:56,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723865879] [2022-12-13 19:03:56,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723865879] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:03:56,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:03:56,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-12-13 19:03:56,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053893038] [2022-12-13 19:03:56,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:03:56,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 19:03:56,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:03:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 19:03:56,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:04:00,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 422 [2022-12-13 19:04:00,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 219 transitions, 2598 flow. Second operand has 21 states, 21 states have (on average 175.38095238095238) internal successors, (3683), 21 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:04:00,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:04:00,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 422 [2022-12-13 19:04:00,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:04:28,612 INFO L130 PetriNetUnfolder]: 106096/148529 cut-off events. [2022-12-13 19:04:28,612 INFO L131 PetriNetUnfolder]: For 599230/611535 co-relation queries the response was YES. [2022-12-13 19:04:29,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610244 conditions, 148529 events. 106096/148529 cut-off events. For 599230/611535 co-relation queries the response was YES. Maximal size of possible extension queue 4082. Compared 1076511 event pairs, 27300 based on Foata normal form. 9524/137756 useless extension candidates. Maximal degree in co-relation 610183. Up to 47201 conditions per place. [2022-12-13 19:04:30,454 INFO L137 encePairwiseOnDemand]: 412/422 looper letters, 730 selfloop transitions, 84 changer transitions 0/832 dead transitions. [2022-12-13 19:04:30,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 832 transitions, 8992 flow [2022-12-13 19:04:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 19:04:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 19:04:30,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6896 transitions. [2022-12-13 19:04:30,462 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44165492506724735 [2022-12-13 19:04:30,462 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6896 transitions. [2022-12-13 19:04:30,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6896 transitions. [2022-12-13 19:04:30,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:04:30,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6896 transitions. [2022-12-13 19:04:30,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 186.3783783783784) internal successors, (6896), 37 states have internal predecessors, (6896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:04:30,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 422.0) internal successors, (16036), 38 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:04:30,479 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 422.0) internal successors, (16036), 38 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:04:30,480 INFO L175 Difference]: Start difference. First operand has 236 places, 219 transitions, 2598 flow. Second operand 37 states and 6896 transitions. [2022-12-13 19:04:30,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 832 transitions, 8992 flow [2022-12-13 19:04:49,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 832 transitions, 8893 flow, removed 18 selfloop flow, removed 12 redundant places. [2022-12-13 19:04:49,399 INFO L231 Difference]: Finished difference. Result has 262 places, 224 transitions, 2800 flow [2022-12-13 19:04:49,399 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2800, PETRI_PLACES=262, PETRI_TRANSITIONS=224} [2022-12-13 19:04:49,399 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 204 predicate places. [2022-12-13 19:04:49,399 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 224 transitions, 2800 flow [2022-12-13 19:04:49,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 175.38095238095238) internal successors, (3683), 21 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:04:49,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:04:49,400 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:04:49,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-12-13 19:04:49,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:04:49,601 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-12-13 19:04:49,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:04:49,602 INFO L85 PathProgramCache]: Analyzing trace with hash -726808823, now seen corresponding path program 4 times [2022-12-13 19:04:49,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:04:49,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437105500] [2022-12-13 19:04:49,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:04:49,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:04:49,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:04:49,606 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:04:49,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08d5a0f4-b604-49fe-8a71-3bb3d0c39870/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-12-13 19:04:49,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:04:49,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:04:49,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 19:04:49,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:04:50,007 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:04:50,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:04:50,122 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 19:04:50,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 19:04:50,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:04:50,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-12-13 19:04:50,294 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 19:04:50,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 19:04:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:04:50,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:04:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:04:51,951 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:04:51,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437105500] [2022-12-13 19:04:51,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437105500] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:04:51,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:04:51,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 19:04:51,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464940590] [2022-12-13 19:04:51,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:04:51,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 19:04:51,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:04:51,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 19:04:51,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:05:08,970 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 422 [2022-12-13 19:05:08,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 224 transitions, 2800 flow. Second operand has 18 states, 18 states have (on average 160.77777777777777) internal successors, (2894), 18 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:05:08,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:05:08,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 422 [2022-12-13 19:05:08,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:05:14,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:05:16,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:05:18,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:05:24,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:05:25,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]