./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.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_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/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_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/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_cea463d8-5d3d-4663-975c-f5846354ec01/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 df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a --- 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 15:06:12,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:06:12,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:06:12,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:06:12,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:06:12,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:06:12,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:06:12,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:06:12,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:06:12,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:06:12,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:06:12,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:06:12,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:06:12,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:06:12,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:06:12,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:06:12,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:06:12,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:06:12,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:06:12,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:06:12,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:06:12,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:06:12,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:06:12,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:06:12,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:06:12,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:06:12,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:06:12,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:06:12,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:06:12,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:06:12,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:06:12,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:06:12,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:06:12,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:06:12,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:06:12,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:06:12,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:06:12,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:06:12,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:06:12,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:06:12,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:06:12,133 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 15:06:12,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:06:12,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:06:12,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:06:12,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:06:12,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:06:12,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:06:12,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:06:12,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:06:12,149 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:06:12,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:06:12,149 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:06:12,149 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 15:06:12,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:06:12,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:06:12,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:06:12,149 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 15:06:12,149 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 15:06:12,150 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 15:06:12,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:06:12,150 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 15:06:12,150 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:06:12,150 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:06:12,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:06:12,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:06:12,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:06:12,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:06:12,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:06:12,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:06:12,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:06:12,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:06:12,151 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:06:12,151 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:06:12,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:06:12,151 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:06:12,151 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_cea463d8-5d3d-4663-975c-f5846354ec01/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a [2022-12-13 15:06:12,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:06:12,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:06:12,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:06:12,345 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:06:12,345 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:06:12,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2022-12-13 15:06:14,901 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:06:15,063 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:06:15,064 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2022-12-13 15:06:15,070 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/data/926e4de63/829843a7181f4de692b8e43b2f3bc82e/FLAG694dd3a36 [2022-12-13 15:06:15,081 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/data/926e4de63/829843a7181f4de692b8e43b2f3bc82e [2022-12-13 15:06:15,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:06:15,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:06:15,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:06:15,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:06:15,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:06:15,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:06:15" (1/1) ... [2022-12-13 15:06:15,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df51607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:15, skipping insertion in model container [2022-12-13 15:06:15,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:06:15" (1/1) ... [2022-12-13 15:06:15,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:06:15,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:06:15,241 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:15,242 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:15,243 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:15,245 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:15,245 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:15,246 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:15,249 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:15,250 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:15,250 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:15,252 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:15,252 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:15,253 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:15,254 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:15,255 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:15,255 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:15,256 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:15,257 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:15,257 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:15,259 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:15,260 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:15,260 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:15,261 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:15,262 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:15,262 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:15,272 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_cea463d8-5d3d-4663-975c-f5846354ec01/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2022-12-13 15:06:15,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:06:15,293 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 15:06:15,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b2029de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:15, skipping insertion in model container [2022-12-13 15:06:15,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:06:15,293 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 15:06:15,295 INFO L158 Benchmark]: Toolchain (without parser) took 209.94ms. Allocated memory is still 123.7MB. Free memory was 85.8MB in the beginning and 74.1MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 15:06:15,295 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 123.7MB. Free memory is still 95.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 15:06:15,296 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.83ms. Allocated memory is still 123.7MB. Free memory was 85.8MB in the beginning and 74.1MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 15:06:15,297 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 123.7MB. Free memory is still 95.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 207.83ms. Allocated memory is still 123.7MB. Free memory was 85.8MB in the beginning and 74.1MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: 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_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/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_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/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_cea463d8-5d3d-4663-975c-f5846354ec01/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 df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a --- 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 15:06:16,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:06:16,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:06:16,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:06:16,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:06:16,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:06:16,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:06:16,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:06:16,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:06:16,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:06:16,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:06:16,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:06:16,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:06:16,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:06:16,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:06:16,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:06:16,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:06:16,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:06:16,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:06:16,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:06:16,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:06:16,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:06:16,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:06:16,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:06:16,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:06:16,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:06:16,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:06:16,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:06:16,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:06:16,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:06:16,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:06:16,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:06:16,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:06:16,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:06:16,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:06:16,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:06:16,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:06:16,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:06:16,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:06:16,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:06:16,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:06:16,773 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 15:06:16,794 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:06:16,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:06:16,795 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:06:16,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:06:16,796 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:06:16,796 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:06:16,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:06:16,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:06:16,797 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:06:16,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:06:16,797 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:06:16,797 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 15:06:16,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:06:16,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:06:16,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:06:16,798 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 15:06:16,798 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 15:06:16,799 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 15:06:16,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:06:16,799 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 15:06:16,799 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 15:06:16,799 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 15:06:16,800 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:06:16,800 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:06:16,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:06:16,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:06:16,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:06:16,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:06:16,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:06:16,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:06:16,801 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 15:06:16,801 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 15:06:16,802 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:06:16,802 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:06:16,802 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:06:16,802 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 15:06:16,802 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:06:16,802 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_cea463d8-5d3d-4663-975c-f5846354ec01/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a [2022-12-13 15:06:17,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:06:17,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:06:17,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:06:17,033 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:06:17,033 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:06:17,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2022-12-13 15:06:19,615 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:06:19,782 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:06:19,782 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2022-12-13 15:06:19,788 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/data/4fbe0e33e/eb41c03c79b84be5b62f745ace0854bf/FLAGd115ec35c [2022-12-13 15:06:20,176 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/data/4fbe0e33e/eb41c03c79b84be5b62f745ace0854bf [2022-12-13 15:06:20,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:06:20,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:06:20,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:06:20,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:06:20,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:06:20,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:06:20" (1/1) ... [2022-12-13 15:06:20,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@588363a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:20, skipping insertion in model container [2022-12-13 15:06:20,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:06:20" (1/1) ... [2022-12-13 15:06:20,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:06:20,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:06:20,320 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,322 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,322 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,325 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,329 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,330 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,330 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,331 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,331 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,332 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,333 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,338 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,339 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,339 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,341 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,359 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_cea463d8-5d3d-4663-975c-f5846354ec01/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2022-12-13 15:06:20,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:06:20,380 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 15:06:20,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:06:20,386 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,387 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,387 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,388 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,388 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,389 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,389 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,390 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,390 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,391 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,391 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,391 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,392 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,392 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,392 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,393 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,393 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,394 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,394 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,395 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,395 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,396 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,396 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,396 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,400 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_cea463d8-5d3d-4663-975c-f5846354ec01/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2022-12-13 15:06:20,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:06:20,407 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:06:20,416 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,417 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,417 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,418 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,418 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,418 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,419 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,419 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,419 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,420 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,420 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,421 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,421 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,421 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,422 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,422 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,423 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,423 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,424 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,424 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,424 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,425 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,425 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:06:20,425 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:06:20,429 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_cea463d8-5d3d-4663-975c-f5846354ec01/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2022-12-13 15:06:20,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:06:20,443 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:06:20,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:20 WrapperNode [2022-12-13 15:06:20,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:06:20,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:06:20,444 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:06:20,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:06:20,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:20" (1/1) ... [2022-12-13 15:06:20,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:20" (1/1) ... [2022-12-13 15:06:20,477 INFO L138 Inliner]: procedures = 29, calls = 76, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 293 [2022-12-13 15:06:20,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:06:20,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:06:20,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:06:20,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:06:20,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:20" (1/1) ... [2022-12-13 15:06:20,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:20" (1/1) ... [2022-12-13 15:06:20,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:20" (1/1) ... [2022-12-13 15:06:20,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:20" (1/1) ... [2022-12-13 15:06:20,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:20" (1/1) ... [2022-12-13 15:06:20,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:20" (1/1) ... [2022-12-13 15:06:20,501 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:20" (1/1) ... [2022-12-13 15:06:20,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:20" (1/1) ... [2022-12-13 15:06:20,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:06:20,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:06:20,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:06:20,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:06:20,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:20" (1/1) ... [2022-12-13 15:06:20,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:06:20,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:06:20,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:06:20,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:06:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:06:20,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 15:06:20,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:06:20,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 15:06:20,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 15:06:20,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 15:06:20,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 15:06:20,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 15:06:20,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 15:06:20,562 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 15:06:20,562 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 15:06:20,562 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 15:06:20,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 15:06:20,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 15:06:20,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 15:06:20,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:06:20,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:06:20,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:06:20,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 15:06:20,564 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 15:06:20,671 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:06:20,672 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:06:21,227 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:06:21,353 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:06:21,354 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 15:06:21,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:06:21 BoogieIcfgContainer [2022-12-13 15:06:21,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:06:21,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:06:21,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:06:21,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:06:21,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:06:20" (1/3) ... [2022-12-13 15:06:21,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d31c103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:06:21, skipping insertion in model container [2022-12-13 15:06:21,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:06:20" (2/3) ... [2022-12-13 15:06:21,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d31c103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:06:21, skipping insertion in model container [2022-12-13 15:06:21,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:06:21" (3/3) ... [2022-12-13 15:06:21,365 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2022-12-13 15:06:21,378 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:06:21,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-12-13 15:06:21,378 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:06:21,430 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 15:06:21,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 253 transitions, 538 flow [2022-12-13 15:06:21,537 INFO L130 PetriNetUnfolder]: 18/249 cut-off events. [2022-12-13 15:06:21,537 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 15:06:21,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 249 events. 18/249 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 226 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 197. Up to 2 conditions per place. [2022-12-13 15:06:21,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 253 transitions, 538 flow [2022-12-13 15:06:21,549 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 244 transitions, 512 flow [2022-12-13 15:06:21,552 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:06:21,563 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 239 places, 244 transitions, 512 flow [2022-12-13 15:06:21,565 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 239 places, 244 transitions, 512 flow [2022-12-13 15:06:21,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 244 transitions, 512 flow [2022-12-13 15:06:21,611 INFO L130 PetriNetUnfolder]: 18/244 cut-off events. [2022-12-13 15:06:21,611 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 15:06:21,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 244 events. 18/244 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 225 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 197. Up to 2 conditions per place. [2022-12-13 15:06:21,620 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2022-12-13 15:06:54,516 INFO L134 LiptonReduction]: Checked pairs total: 5455 [2022-12-13 15:06:54,516 INFO L136 LiptonReduction]: Total number of compositions: 247 [2022-12-13 15:06:54,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:06:54,536 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;@49f8e7cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:06:54,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-12-13 15:06:54,539 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 15:06:54,539 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:06:54,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:06:54,540 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:06:54,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:06:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:06:54,544 INFO L85 PathProgramCache]: Analyzing trace with hash 38448, now seen corresponding path program 1 times [2022-12-13 15:06:54,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:06:54,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155040031] [2022-12-13 15:06:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:06:54,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:06:54,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:06:54,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:06:54,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:06:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:06:54,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:06:54,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:06:54,805 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 15:06:54,806 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 15:06:54,845 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 15:06:54,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:06:54,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:06:54,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155040031] [2022-12-13 15:06:54,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155040031] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:06:54,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:06:54,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:06:54,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172474875] [2022-12-13 15:06:54,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:06:54,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:06:54,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:06:54,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:06:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:06:55,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 500 [2022-12-13 15:06:55,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:06:55,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:06:55,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 500 [2022-12-13 15:06:55,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:06:57,374 INFO L130 PetriNetUnfolder]: 15612/19511 cut-off events. [2022-12-13 15:06:57,374 INFO L131 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-12-13 15:06:57,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39190 conditions, 19511 events. 15612/19511 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 1469. Compared 95484 event pairs, 10106 based on Foata normal form. 0/5200 useless extension candidates. Maximal degree in co-relation 34210. Up to 19205 conditions per place. [2022-12-13 15:06:57,496 INFO L137 encePairwiseOnDemand]: 496/500 looper letters, 54 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2022-12-13 15:06:57,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 61 transitions, 256 flow [2022-12-13 15:06:57,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:06:57,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:06:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-12-13 15:06:57,510 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45466666666666666 [2022-12-13 15:06:57,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-12-13 15:06:57,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-12-13 15:06:57,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:06:57,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-12-13 15:06:57,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:06:57,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:06:57,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:06:57,530 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 152 flow. Second operand 3 states and 682 transitions. [2022-12-13 15:06:57,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 61 transitions, 256 flow [2022-12-13 15:06:57,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 61 transitions, 240 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 15:06:57,544 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 132 flow [2022-12-13 15:06:57,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2022-12-13 15:06:57,549 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2022-12-13 15:06:57,549 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 132 flow [2022-12-13 15:06:57,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:06:57,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:06:57,549 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:06:57,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:06:57,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:06:57,751 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:06:57,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:06:57,752 INFO L85 PathProgramCache]: Analyzing trace with hash 38449, now seen corresponding path program 1 times [2022-12-13 15:06:57,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:06:57,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607232174] [2022-12-13 15:06:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:06:57,754 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 15:06:57,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:06:57,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:06:57,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:06:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:06:57,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:06:57,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:06:58,100 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:06:58,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:06:58,132 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 15:06:58,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:06:58,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:06:58,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607232174] [2022-12-13 15:06:58,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607232174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:06:58,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:06:58,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:06:58,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742307984] [2022-12-13 15:06:58,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:06:58,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:06:58,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:06:58,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:06:58,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:06:58,297 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 500 [2022-12-13 15:06:58,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:06:58,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:06:58,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 500 [2022-12-13 15:06:58,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:01,816 INFO L130 PetriNetUnfolder]: 31223/39019 cut-off events. [2022-12-13 15:07:01,816 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:07:01,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77742 conditions, 39019 events. 31223/39019 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2686. Compared 206919 event pairs, 20212 based on Foata normal form. 0/10774 useless extension candidates. Maximal degree in co-relation 77736. Up to 19206 conditions per place. [2022-12-13 15:07:01,972 INFO L137 encePairwiseOnDemand]: 494/500 looper letters, 103 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2022-12-13 15:07:01,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 113 transitions, 458 flow [2022-12-13 15:07:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:07:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2022-12-13 15:07:01,975 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4886666666666667 [2022-12-13 15:07:01,975 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2022-12-13 15:07:01,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2022-12-13 15:07:01,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:01,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2022-12-13 15:07:01,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:01,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:01,980 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:01,980 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 132 flow. Second operand 3 states and 733 transitions. [2022-12-13 15:07:01,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 113 transitions, 458 flow [2022-12-13 15:07:01,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 113 transitions, 457 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:07:01,982 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 163 flow [2022-12-13 15:07:01,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2022-12-13 15:07:01,983 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -6 predicate places. [2022-12-13 15:07:01,983 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 163 flow [2022-12-13 15:07:01,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:01,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:01,983 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:07:01,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:02,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:02,184 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:07:02,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:02,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1196020, now seen corresponding path program 1 times [2022-12-13 15:07:02,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:07:02,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128467898] [2022-12-13 15:07:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:02,185 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 15:07:02,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:07:02,186 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:02,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:02,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 15:07:02,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:07:02,413 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:07:02,413 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:07:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:02,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:07:02,648 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 15:07:02,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:07:02,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128467898] [2022-12-13 15:07:02,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128467898] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:07:02,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:07:02,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 15:07:02,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908330565] [2022-12-13 15:07:02,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:07:02,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:07:02,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:07:02,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:07:02,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:07:03,408 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 500 [2022-12-13 15:07:03,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 163 flow. Second operand has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:03,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:03,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 500 [2022-12-13 15:07:03,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:09,297 INFO L130 PetriNetUnfolder]: 46842/58539 cut-off events. [2022-12-13 15:07:09,297 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:07:09,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116658 conditions, 58539 events. 46842/58539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3784. Compared 321979 event pairs, 30318 based on Foata normal form. 0/16362 useless extension candidates. Maximal degree in co-relation 116649. Up to 19207 conditions per place. [2022-12-13 15:07:09,548 INFO L137 encePairwiseOnDemand]: 491/500 looper letters, 152 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2022-12-13 15:07:09,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 177 transitions, 771 flow [2022-12-13 15:07:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:07:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:07:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1365 transitions. [2022-12-13 15:07:09,552 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.455 [2022-12-13 15:07:09,552 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1365 transitions. [2022-12-13 15:07:09,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1365 transitions. [2022-12-13 15:07:09,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:09,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1365 transitions. [2022-12-13 15:07:09,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 227.5) internal successors, (1365), 6 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:09,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 500.0) internal successors, (3500), 7 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:09,560 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 500.0) internal successors, (3500), 7 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:09,560 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 163 flow. Second operand 6 states and 1365 transitions. [2022-12-13 15:07:09,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 177 transitions, 771 flow [2022-12-13 15:07:09,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 177 transitions, 757 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:07:09,563 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 300 flow [2022-12-13 15:07:09,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2022-12-13 15:07:09,564 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 1 predicate places. [2022-12-13 15:07:09,564 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 300 flow [2022-12-13 15:07:09,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:09,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:09,565 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:07:09,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:09,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:09,766 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:07:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:09,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1197490, now seen corresponding path program 1 times [2022-12-13 15:07:09,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:07:09,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859538497] [2022-12-13 15:07:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:09,767 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 15:07:09,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:07:09,768 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:09,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:09,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 15:07:09,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:07:09,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:09,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:09,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:09,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:09,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:09,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:09,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:10,018 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-13 15:07:10,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2022-12-13 15:07:10,062 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-12-13 15:07:10,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-12-13 15:07:10,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:10,123 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 15:07:10,148 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 15:07:10,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:07:10,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:07:10,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859538497] [2022-12-13 15:07:10,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859538497] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:10,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:10,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:07:10,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729987658] [2022-12-13 15:07:10,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:10,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:07:10,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:07:10,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:07:10,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:07:10,410 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 500 [2022-12-13 15:07:10,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 300 flow. Second operand has 4 states, 4 states have (on average 213.75) internal successors, (855), 4 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:10,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:10,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 500 [2022-12-13 15:07:10,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:14,652 INFO L130 PetriNetUnfolder]: 37840/47659 cut-off events. [2022-12-13 15:07:14,652 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 15:07:14,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94946 conditions, 47659 events. 37840/47659 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2978. Compared 261904 event pairs, 24318 based on Foata normal form. 0/13738 useless extension candidates. Maximal degree in co-relation 94933. Up to 46741 conditions per place. [2022-12-13 15:07:14,898 INFO L137 encePairwiseOnDemand]: 497/500 looper letters, 68 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2022-12-13 15:07:14,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 418 flow [2022-12-13 15:07:14,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:07:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 694 transitions. [2022-12-13 15:07:14,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46266666666666667 [2022-12-13 15:07:14,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 694 transitions. [2022-12-13 15:07:14,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 694 transitions. [2022-12-13 15:07:14,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:14,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 694 transitions. [2022-12-13 15:07:14,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:14,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:14,905 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:14,905 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 300 flow. Second operand 3 states and 694 transitions. [2022-12-13 15:07:14,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 418 flow [2022-12-13 15:07:14,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 75 transitions, 399 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 15:07:14,908 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 263 flow [2022-12-13 15:07:14,908 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2022-12-13 15:07:14,908 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2022-12-13 15:07:14,909 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 263 flow [2022-12-13 15:07:14,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.75) internal successors, (855), 4 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:14,909 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:14,909 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:07:14,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:15,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:15,111 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:07:15,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:15,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1197492, now seen corresponding path program 1 times [2022-12-13 15:07:15,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:07:15,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988416906] [2022-12-13 15:07:15,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:15,114 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 15:07:15,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:07:15,118 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:15,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:15,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 15:07:15,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:07:15,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:15,342 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-12-13 15:07:15,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-12-13 15:07:16,153 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-12-13 15:07:16,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-12-13 15:07:16,284 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 15:07:16,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:07:16,284 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:07:16,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988416906] [2022-12-13 15:07:16,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988416906] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:16,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:16,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:07:16,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37156837] [2022-12-13 15:07:16,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:16,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:07:16,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:07:16,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:07:16,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:07:16,765 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 500 [2022-12-13 15:07:16,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:16,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:16,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 500 [2022-12-13 15:07:16,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:19,926 INFO L130 PetriNetUnfolder]: 28838/36779 cut-off events. [2022-12-13 15:07:19,926 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 15:07:19,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73167 conditions, 36779 events. 28838/36779 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2146. Compared 202542 event pairs, 18318 based on Foata normal form. 0/11863 useless extension candidates. Maximal degree in co-relation 73153. Up to 35861 conditions per place. [2022-12-13 15:07:20,099 INFO L137 encePairwiseOnDemand]: 497/500 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2022-12-13 15:07:20,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 71 transitions, 373 flow [2022-12-13 15:07:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:07:20,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2022-12-13 15:07:20,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4573333333333333 [2022-12-13 15:07:20,102 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2022-12-13 15:07:20,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2022-12-13 15:07:20,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:20,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2022-12-13 15:07:20,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:20,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:20,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:20,106 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 263 flow. Second operand 3 states and 686 transitions. [2022-12-13 15:07:20,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 71 transitions, 373 flow [2022-12-13 15:07:20,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:07:20,108 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 244 flow [2022-12-13 15:07:20,108 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2022-12-13 15:07:20,108 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2022-12-13 15:07:20,108 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 244 flow [2022-12-13 15:07:20,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:20,109 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:20,109 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:07:20,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:20,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:20,310 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:07:20,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:20,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1150818475, now seen corresponding path program 1 times [2022-12-13 15:07:20,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:07:20,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498045484] [2022-12-13 15:07:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:20,314 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 15:07:20,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:07:20,317 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:20,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:20,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 15:07:20,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:07:20,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:20,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:20,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:20,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:20,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:20,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:20,599 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-12-13 15:07:20,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-12-13 15:07:20,630 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 15:07:20,631 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 31 treesize of output 27 [2022-12-13 15:07:20,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:20,687 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 15:07:20,734 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 15:07:20,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:07:20,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:07:20,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498045484] [2022-12-13 15:07:20,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498045484] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:20,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:20,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:07:20,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402428401] [2022-12-13 15:07:20,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:20,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:07:20,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:07:20,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:07:20,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:07:20,964 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 500 [2022-12-13 15:07:20,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:20,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:20,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 500 [2022-12-13 15:07:20,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:23,901 INFO L130 PetriNetUnfolder]: 27617/35168 cut-off events. [2022-12-13 15:07:23,901 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 15:07:23,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69946 conditions, 35168 events. 27617/35168 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2034. Compared 192099 event pairs, 17409 based on Foata normal form. 0/11557 useless extension candidates. Maximal degree in co-relation 69931. Up to 34250 conditions per place. [2022-12-13 15:07:24,054 INFO L137 encePairwiseOnDemand]: 497/500 looper letters, 62 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2022-12-13 15:07:24,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 366 flow [2022-12-13 15:07:24,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:24,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:07:24,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2022-12-13 15:07:24,056 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46 [2022-12-13 15:07:24,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2022-12-13 15:07:24,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2022-12-13 15:07:24,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:24,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2022-12-13 15:07:24,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:24,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:24,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:24,059 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 244 flow. Second operand 3 states and 690 transitions. [2022-12-13 15:07:24,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 366 flow [2022-12-13 15:07:24,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:07:24,061 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 241 flow [2022-12-13 15:07:24,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2022-12-13 15:07:24,061 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2022-12-13 15:07:24,061 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 241 flow [2022-12-13 15:07:24,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:24,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:24,062 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:07:24,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:24,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:24,264 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:07:24,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:24,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1150818474, now seen corresponding path program 1 times [2022-12-13 15:07:24,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:07:24,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685146043] [2022-12-13 15:07:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:24,267 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 15:07:24,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:07:24,270 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:24,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:24,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 15:07:24,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:07:24,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:24,485 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-12-13 15:07:24,486 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 7 case distinctions, treesize of input 49 treesize of output 74 [2022-12-13 15:07:24,720 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-13 15:07:24,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-12-13 15:07:24,794 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 15:07:24,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:07:24,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:07:24,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685146043] [2022-12-13 15:07:24,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685146043] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:24,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:24,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:07:24,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370074911] [2022-12-13 15:07:24,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:24,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:07:24,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:07:24,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:07:24,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:07:25,022 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 500 [2022-12-13 15:07:25,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:25,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:25,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 500 [2022-12-13 15:07:25,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:27,783 INFO L130 PetriNetUnfolder]: 26396/33557 cut-off events. [2022-12-13 15:07:27,783 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 15:07:27,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66725 conditions, 33557 events. 26396/33557 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1956. Compared 181414 event pairs, 16500 based on Foata normal form. 0/11251 useless extension candidates. Maximal degree in co-relation 66709. Up to 32639 conditions per place. [2022-12-13 15:07:27,949 INFO L137 encePairwiseOnDemand]: 497/500 looper letters, 60 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2022-12-13 15:07:27,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 359 flow [2022-12-13 15:07:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:27,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:07:27,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-12-13 15:07:27,952 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45466666666666666 [2022-12-13 15:07:27,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-12-13 15:07:27,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-12-13 15:07:27,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:27,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-12-13 15:07:27,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:27,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:27,955 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:27,955 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 241 flow. Second operand 3 states and 682 transitions. [2022-12-13 15:07:27,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 359 flow [2022-12-13 15:07:27,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:07:27,957 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 238 flow [2022-12-13 15:07:27,957 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2022-12-13 15:07:27,958 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-12-13 15:07:27,958 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 238 flow [2022-12-13 15:07:27,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:27,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:27,958 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 15:07:27,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:28,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:28,161 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:07:28,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1274965745, now seen corresponding path program 2 times [2022-12-13 15:07:28,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:07:28,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031525419] [2022-12-13 15:07:28,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:07:28,164 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 15:07:28,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:07:28,167 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:28,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:28,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:07:28,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:07:28,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 15:07:28,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:07:28,452 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:07:28,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:07:28,566 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 15:07:28,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:07:29,085 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 15:07:29,085 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:07:29,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031525419] [2022-12-13 15:07:29,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031525419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:07:29,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:07:29,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 15:07:29,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094381086] [2022-12-13 15:07:29,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:07:29,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:07:29,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:07:29,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:07:29,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:07:34,387 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 500 [2022-12-13 15:07:34,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 238 flow. Second operand has 12 states, 12 states have (on average 201.0) internal successors, (2412), 12 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:34,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:34,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 500 [2022-12-13 15:07:34,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:37,832 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 15:07:40,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:07:42,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:07:44,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:07:56,826 INFO L130 PetriNetUnfolder]: 79177/100647 cut-off events. [2022-12-13 15:07:56,826 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-12-13 15:07:57,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200050 conditions, 100647 events. 79177/100647 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 4290. Compared 596447 event pairs, 49500 based on Foata normal form. 11/34736 useless extension candidates. Maximal degree in co-relation 200033. Up to 10885 conditions per place. [2022-12-13 15:07:57,356 INFO L137 encePairwiseOnDemand]: 493/500 looper letters, 374 selfloop transitions, 31 changer transitions 0/411 dead transitions. [2022-12-13 15:07:57,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 411 transitions, 1896 flow [2022-12-13 15:07:57,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:07:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:07:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2816 transitions. [2022-12-13 15:07:57,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4693333333333333 [2022-12-13 15:07:57,363 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2816 transitions. [2022-12-13 15:07:57,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2816 transitions. [2022-12-13 15:07:57,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:57,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2816 transitions. [2022-12-13 15:07:57,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 234.66666666666666) internal successors, (2816), 12 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:57,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 500.0) internal successors, (6500), 13 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:57,375 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 500.0) internal successors, (6500), 13 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:57,375 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 238 flow. Second operand 12 states and 2816 transitions. [2022-12-13 15:07:57,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 411 transitions, 1896 flow [2022-12-13 15:07:57,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 411 transitions, 1895 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:07:57,380 INFO L231 Difference]: Finished difference. Result has 85 places, 85 transitions, 469 flow [2022-12-13 15:07:57,380 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=469, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-12-13 15:07:57,380 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2022-12-13 15:07:57,380 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 469 flow [2022-12-13 15:07:57,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 201.0) internal successors, (2412), 12 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:57,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:57,381 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:07:57,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:57,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:57,583 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:07:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:57,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1315627327, now seen corresponding path program 1 times [2022-12-13 15:07:57,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:07:57,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96071077] [2022-12-13 15:07:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:57,584 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 15:07:57,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:07:57,585 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:57,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:07:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:57,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 15:07:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:07:57,705 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 15:07:57,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:07:57,705 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:07:57,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96071077] [2022-12-13 15:07:57,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96071077] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:57,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:57,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:07:57,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74422785] [2022-12-13 15:07:57,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:57,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:07:57,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:07:57,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:07:57,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:07:57,818 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 500 [2022-12-13 15:07:57,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 469 flow. Second operand has 4 states, 4 states have (on average 211.25) internal successors, (845), 4 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:57,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:57,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 500 [2022-12-13 15:07:57,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:08:08,272 INFO L130 PetriNetUnfolder]: 90338/116481 cut-off events. [2022-12-13 15:08:08,272 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2022-12-13 15:08:08,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231684 conditions, 116481 events. 90338/116481 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 4905. Compared 727984 event pairs, 57510 based on Foata normal form. 0/43310 useless extension candidates. Maximal degree in co-relation 231659. Up to 97892 conditions per place. [2022-12-13 15:08:08,898 INFO L137 encePairwiseOnDemand]: 491/500 looper letters, 125 selfloop transitions, 3 changer transitions 0/134 dead transitions. [2022-12-13 15:08:08,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 134 transitions, 942 flow [2022-12-13 15:08:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:08:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:08:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 932 transitions. [2022-12-13 15:08:08,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.466 [2022-12-13 15:08:08,901 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 932 transitions. [2022-12-13 15:08:08,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 932 transitions. [2022-12-13 15:08:08,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:08:08,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 932 transitions. [2022-12-13 15:08:08,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:08,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:08,904 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:08,904 INFO L175 Difference]: Start difference. First operand has 85 places, 85 transitions, 469 flow. Second operand 4 states and 932 transitions. [2022-12-13 15:08:08,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 134 transitions, 942 flow [2022-12-13 15:08:08,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 134 transitions, 859 flow, removed 21 selfloop flow, removed 4 redundant places. [2022-12-13 15:08:08,907 INFO L231 Difference]: Finished difference. Result has 85 places, 85 transitions, 427 flow [2022-12-13 15:08:08,907 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=427, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-12-13 15:08:08,908 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2022-12-13 15:08:08,908 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 427 flow [2022-12-13 15:08:08,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 211.25) internal successors, (845), 4 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:08,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:08:08,908 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:08,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:08:09,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:08:09,110 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:08:09,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:09,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2129987216, now seen corresponding path program 1 times [2022-12-13 15:08:09,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:08:09,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005529132] [2022-12-13 15:08:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:09,112 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 15:08:09,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:08:09,114 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:08:09,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:08:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:09,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 15:08:09,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:08:09,323 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-12-13 15:08:09,323 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-12-13 15:08:09,780 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-12-13 15:08:09,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-12-13 15:08:09,966 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 15:08:09,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:08:09,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:08:09,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005529132] [2022-12-13 15:08:09,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005529132] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:09,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:08:09,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:08:09,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062704264] [2022-12-13 15:08:09,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:09,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:09,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:08:09,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:09,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:08:10,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 500 [2022-12-13 15:08:10,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 427 flow. Second operand has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:10,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:08:10,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 500 [2022-12-13 15:08:10,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:08:20,818 INFO L130 PetriNetUnfolder]: 89096/114609 cut-off events. [2022-12-13 15:08:20,819 INFO L131 PetriNetUnfolder]: For 10125/10125 co-relation queries the response was YES. [2022-12-13 15:08:21,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258868 conditions, 114609 events. 89096/114609 cut-off events. For 10125/10125 co-relation queries the response was YES. Maximal size of possible extension queue 4892. Compared 714626 event pairs, 56637 based on Foata normal form. 0/52113 useless extension candidates. Maximal degree in co-relation 258841. Up to 111387 conditions per place. [2022-12-13 15:08:21,594 INFO L137 encePairwiseOnDemand]: 497/500 looper letters, 76 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2022-12-13 15:08:21,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 577 flow [2022-12-13 15:08:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:21,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:08:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 680 transitions. [2022-12-13 15:08:21,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4533333333333333 [2022-12-13 15:08:21,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 680 transitions. [2022-12-13 15:08:21,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 680 transitions. [2022-12-13 15:08:21,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:08:21,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 680 transitions. [2022-12-13 15:08:21,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:21,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:21,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:21,600 INFO L175 Difference]: Start difference. First operand has 85 places, 85 transitions, 427 flow. Second operand 3 states and 680 transitions. [2022-12-13 15:08:21,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 577 flow [2022-12-13 15:08:21,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 83 transitions, 571 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 15:08:21,632 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 419 flow [2022-12-13 15:08:21,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=419, PETRI_PLACES=84, PETRI_TRANSITIONS=83} [2022-12-13 15:08:21,633 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 13 predicate places. [2022-12-13 15:08:21,633 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 419 flow [2022-12-13 15:08:21,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:21,633 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:08:21,634 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:21,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 15:08:21,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:08:21,835 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:08:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:21,836 INFO L85 PathProgramCache]: Analyzing trace with hash 909898113, now seen corresponding path program 1 times [2022-12-13 15:08:21,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:08:21,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332490515] [2022-12-13 15:08:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:21,838 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 15:08:21,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:08:21,841 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:08:21,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:08:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:21,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:08:21,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:22,088 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 15:08:22,088 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 15:08:22,121 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 15:08:22,121 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 15:08:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:08:22,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:08:22,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:08:22,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332490515] [2022-12-13 15:08:22,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332490515] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:22,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:08:22,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:08:22,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395069417] [2022-12-13 15:08:22,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:22,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:08:22,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:08:22,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:08:22,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:08:22,323 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 500 [2022-12-13 15:08:22,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 419 flow. Second operand has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:22,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:08:22,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 500 [2022-12-13 15:08:22,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:08:30,072 INFO L130 PetriNetUnfolder]: 61007/79662 cut-off events. [2022-12-13 15:08:30,072 INFO L131 PetriNetUnfolder]: For 8255/8255 co-relation queries the response was YES. [2022-12-13 15:08:30,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175319 conditions, 79662 events. 61007/79662 cut-off events. For 8255/8255 co-relation queries the response was YES. Maximal size of possible extension queue 3411. Compared 498679 event pairs, 39159 based on Foata normal form. 0/40935 useless extension candidates. Maximal degree in co-relation 175291. Up to 77336 conditions per place. [2022-12-13 15:08:30,594 INFO L137 encePairwiseOnDemand]: 496/500 looper letters, 63 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2022-12-13 15:08:30,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 561 flow [2022-12-13 15:08:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:08:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:08:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 869 transitions. [2022-12-13 15:08:30,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4345 [2022-12-13 15:08:30,597 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 869 transitions. [2022-12-13 15:08:30,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 869 transitions. [2022-12-13 15:08:30,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:08:30,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 869 transitions. [2022-12-13 15:08:30,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:30,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:30,601 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:30,601 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 419 flow. Second operand 4 states and 869 transitions. [2022-12-13 15:08:30,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 561 flow [2022-12-13 15:08:30,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 81 transitions, 560 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:08:30,621 INFO L231 Difference]: Finished difference. Result has 84 places, 81 transitions, 434 flow [2022-12-13 15:08:30,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=434, PETRI_PLACES=84, PETRI_TRANSITIONS=81} [2022-12-13 15:08:30,622 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 13 predicate places. [2022-12-13 15:08:30,622 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 81 transitions, 434 flow [2022-12-13 15:08:30,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:30,623 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:08:30,623 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:30,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:08:30,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:08:30,825 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:08:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:30,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2129987217, now seen corresponding path program 1 times [2022-12-13 15:08:30,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:08:30,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026236549] [2022-12-13 15:08:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:30,828 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 15:08:30,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:08:30,831 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:08:30,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:08:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:30,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 15:08:30,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:31,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:08:31,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:08:31,127 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-12-13 15:08:31,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 53 [2022-12-13 15:08:31,146 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 60 treesize of output 58 [2022-12-13 15:08:31,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:08:31,249 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 15:08:31,314 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 15:08:31,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:08:31,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:08:31,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026236549] [2022-12-13 15:08:31,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026236549] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:31,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:08:31,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:08:31,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921559729] [2022-12-13 15:08:31,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:31,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:08:31,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:08:31,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:08:31,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:08:31,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 500 [2022-12-13 15:08:31,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 81 transitions, 434 flow. Second operand has 4 states, 4 states have (on average 214.75) internal successors, (859), 4 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:31,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:08:31,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 500 [2022-12-13 15:08:31,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:08:39,289 INFO L130 PetriNetUnfolder]: 59909/78024 cut-off events. [2022-12-13 15:08:39,289 INFO L131 PetriNetUnfolder]: For 8168/8168 co-relation queries the response was YES. [2022-12-13 15:08:39,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171785 conditions, 78024 events. 59909/78024 cut-off events. For 8168/8168 co-relation queries the response was YES. Maximal size of possible extension queue 3393. Compared 483972 event pairs, 38412 based on Foata normal form. 0/40413 useless extension candidates. Maximal degree in co-relation 171756. Up to 75711 conditions per place. [2022-12-13 15:08:39,795 INFO L137 encePairwiseOnDemand]: 497/500 looper letters, 72 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2022-12-13 15:08:39,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 79 transitions, 576 flow [2022-12-13 15:08:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:39,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:08:39,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-12-13 15:08:39,797 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45466666666666666 [2022-12-13 15:08:39,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-12-13 15:08:39,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-12-13 15:08:39,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:08:39,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-12-13 15:08:39,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:39,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:39,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:39,801 INFO L175 Difference]: Start difference. First operand has 84 places, 81 transitions, 434 flow. Second operand 3 states and 682 transitions. [2022-12-13 15:08:39,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 79 transitions, 576 flow [2022-12-13 15:08:39,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 79 transitions, 563 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:08:39,817 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 419 flow [2022-12-13 15:08:39,818 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=419, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2022-12-13 15:08:39,818 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 11 predicate places. [2022-12-13 15:08:39,818 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 419 flow [2022-12-13 15:08:39,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 214.75) internal successors, (859), 4 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:39,818 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:08:39,819 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:39,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-12-13 15:08:40,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:08:40,019 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:08:40,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:40,020 INFO L85 PathProgramCache]: Analyzing trace with hash 909898114, now seen corresponding path program 1 times [2022-12-13 15:08:40,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:08:40,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583783911] [2022-12-13 15:08:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:40,020 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 15:08:40,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:08:40,021 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:08:40,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:08:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:40,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 15:08:40,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:40,321 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:08:40,321 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:08:40,484 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 15:08:40,485 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 15:08:40,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:08:40,587 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 15:08:40,596 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 15:08:40,597 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 15:08:40,633 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 15:08:40,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:08:46,183 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 15:08:46,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:08:46,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583783911] [2022-12-13 15:08:46,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583783911] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:08:46,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:08:46,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 15:08:46,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30831551] [2022-12-13 15:08:46,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:08:46,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:08:46,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:08:46,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:08:46,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:08:48,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:08:50,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:08:56,040 WARN L539 Checker$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 15:09:04,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:09:05,765 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 500 [2022-12-13 15:09:05,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 419 flow. Second operand has 8 states, 8 states have (on average 189.5) internal successors, (1516), 8 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:05,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:09:05,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 500 [2022-12-13 15:09:05,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:09:12,963 WARN L233 SmtUtils]: Spent 7.10s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:09:14,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:09:23,791 WARN L233 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:09:47,113 INFO L130 PetriNetUnfolder]: 115018/149877 cut-off events. [2022-12-13 15:09:47,113 INFO L131 PetriNetUnfolder]: For 20865/20865 co-relation queries the response was YES. [2022-12-13 15:09:47,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327310 conditions, 149877 events. 115018/149877 cut-off events. For 20865/20865 co-relation queries the response was YES. Maximal size of possible extension queue 5926. Compared 987583 event pairs, 73008 based on Foata normal form. 0/86981 useless extension candidates. Maximal degree in co-relation 327281. Up to 61183 conditions per place. [2022-12-13 15:09:48,179 INFO L137 encePairwiseOnDemand]: 491/500 looper letters, 204 selfloop transitions, 31 changer transitions 0/241 dead transitions. [2022-12-13 15:09:48,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 241 transitions, 1459 flow [2022-12-13 15:09:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:09:48,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 15:09:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3015 transitions. [2022-12-13 15:09:48,186 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.402 [2022-12-13 15:09:48,186 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3015 transitions. [2022-12-13 15:09:48,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3015 transitions. [2022-12-13 15:09:48,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:09:48,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3015 transitions. [2022-12-13 15:09:48,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 201.0) internal successors, (3015), 15 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:48,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 500.0) internal successors, (8000), 16 states have internal predecessors, (8000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:48,197 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 500.0) internal successors, (8000), 16 states have internal predecessors, (8000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:48,197 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 419 flow. Second operand 15 states and 3015 transitions. [2022-12-13 15:09:48,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 241 transitions, 1459 flow [2022-12-13 15:09:48,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 241 transitions, 1458 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:09:48,237 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 668 flow [2022-12-13 15:09:48,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=668, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2022-12-13 15:09:48,237 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 30 predicate places. [2022-12-13 15:09:48,237 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 668 flow [2022-12-13 15:09:48,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.5) internal successors, (1516), 8 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:48,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:09:48,238 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:09:48,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:09:48,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:09:48,439 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:09:48,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:09:48,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1605087981, now seen corresponding path program 1 times [2022-12-13 15:09:48,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:09:48,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297027042] [2022-12-13 15:09:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:48,442 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 15:09:48,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:09:48,445 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:09:48,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:09:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:48,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:09:48,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:09:48,725 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 15:09:48,755 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 15:09:48,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:09:48,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:09:48,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297027042] [2022-12-13 15:09:48,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297027042] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:09:48,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:09:48,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:09:48,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873618492] [2022-12-13 15:09:48,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:09:48,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:09:48,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:09:48,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:09:48,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:09:49,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 500 [2022-12-13 15:09:49,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 668 flow. Second operand has 4 states, 4 states have (on average 207.75) internal successors, (831), 4 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:49,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:09:49,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 500 [2022-12-13 15:09:49,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:09:59,901 INFO L130 PetriNetUnfolder]: 75976/100341 cut-off events. [2022-12-13 15:09:59,902 INFO L131 PetriNetUnfolder]: For 70057/70057 co-relation queries the response was YES. [2022-12-13 15:10:00,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236731 conditions, 100341 events. 75976/100341 cut-off events. For 70057/70057 co-relation queries the response was YES. Maximal size of possible extension queue 4191. Compared 658902 event pairs, 47880 based on Foata normal form. 0/67455 useless extension candidates. Maximal degree in co-relation 236695. Up to 96628 conditions per place. [2022-12-13 15:10:00,663 INFO L137 encePairwiseOnDemand]: 496/500 looper letters, 72 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2022-12-13 15:10:00,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 95 transitions, 842 flow [2022-12-13 15:10:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:10:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:10:00,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 865 transitions. [2022-12-13 15:10:00,666 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4325 [2022-12-13 15:10:00,666 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 865 transitions. [2022-12-13 15:10:00,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 865 transitions. [2022-12-13 15:10:00,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:00,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 865 transitions. [2022-12-13 15:10:00,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 216.25) internal successors, (865), 4 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:00,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:00,669 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:00,669 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 668 flow. Second operand 4 states and 865 transitions. [2022-12-13 15:10:00,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 95 transitions, 842 flow [2022-12-13 15:10:00,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 95 transitions, 821 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 15:10:00,773 INFO L231 Difference]: Finished difference. Result has 101 places, 95 transitions, 677 flow [2022-12-13 15:10:00,774 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=677, PETRI_PLACES=101, PETRI_TRANSITIONS=95} [2022-12-13 15:10:00,774 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 30 predicate places. [2022-12-13 15:10:00,774 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 95 transitions, 677 flow [2022-12-13 15:10:00,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.75) internal successors, (831), 4 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:00,774 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:00,774 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:10:00,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 15:10:00,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:00,976 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:10:00,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:00,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1605087982, now seen corresponding path program 1 times [2022-12-13 15:10:00,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:10:00,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423017684] [2022-12-13 15:10:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:00,979 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 15:10:00,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:10:00,982 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:00,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:01,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 15:10:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:10:01,157 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 15:10:01,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:10:01,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:10:01,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423017684] [2022-12-13 15:10:01,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423017684] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:10:01,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:10:01,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:10:01,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588681234] [2022-12-13 15:10:01,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:10:01,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:10:01,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:10:01,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:10:01,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:10:01,316 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 500 [2022-12-13 15:10:01,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 95 transitions, 677 flow. Second operand has 4 states, 4 states have (on average 211.75) internal successors, (847), 4 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:01,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:01,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 500 [2022-12-13 15:10:01,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:11,529 INFO L130 PetriNetUnfolder]: 69419/92061 cut-off events. [2022-12-13 15:10:11,529 INFO L131 PetriNetUnfolder]: For 65264/65264 co-relation queries the response was YES. [2022-12-13 15:10:11,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217634 conditions, 92061 events. 69419/92061 cut-off events. For 65264/65264 co-relation queries the response was YES. Maximal size of possible extension queue 3933. Compared 606902 event pairs, 44001 based on Foata normal form. 0/63801 useless extension candidates. Maximal degree in co-relation 217597. Up to 85950 conditions per place. [2022-12-13 15:10:12,276 INFO L137 encePairwiseOnDemand]: 493/500 looper letters, 101 selfloop transitions, 18 changer transitions 0/125 dead transitions. [2022-12-13 15:10:12,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 125 transitions, 1020 flow [2022-12-13 15:10:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:10:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:10:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 913 transitions. [2022-12-13 15:10:12,278 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4565 [2022-12-13 15:10:12,278 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 913 transitions. [2022-12-13 15:10:12,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 913 transitions. [2022-12-13 15:10:12,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:12,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 913 transitions. [2022-12-13 15:10:12,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:12,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:12,282 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:12,282 INFO L175 Difference]: Start difference. First operand has 101 places, 95 transitions, 677 flow. Second operand 4 states and 913 transitions. [2022-12-13 15:10:12,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 125 transitions, 1020 flow [2022-12-13 15:10:12,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 125 transitions, 1000 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:10:12,367 INFO L231 Difference]: Finished difference. Result has 104 places, 97 transitions, 748 flow [2022-12-13 15:10:12,367 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=748, PETRI_PLACES=104, PETRI_TRANSITIONS=97} [2022-12-13 15:10:12,367 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 33 predicate places. [2022-12-13 15:10:12,367 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 97 transitions, 748 flow [2022-12-13 15:10:12,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 211.75) internal successors, (847), 4 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:12,368 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:12,368 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:10:12,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:12,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:12,569 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:10:12,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:12,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2122526800, now seen corresponding path program 1 times [2022-12-13 15:10:12,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:10:12,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140577156] [2022-12-13 15:10:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:12,569 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 15:10:12,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:10:12,570 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:12,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:12,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 15:10:12,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:10:12,665 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 15:10:12,884 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 15:10:12,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:10:13,888 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 15:10:13,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:10:13,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140577156] [2022-12-13 15:10:13,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140577156] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:10:13,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:10:13,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 15:10:13,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111721242] [2022-12-13 15:10:13,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:10:13,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:10:13,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:10:13,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:10:13,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:10:17,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 500 [2022-12-13 15:10:17,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 97 transitions, 748 flow. Second operand has 8 states, 8 states have (on average 195.875) internal successors, (1567), 8 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:17,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:17,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 500 [2022-12-13 15:10:17,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:31,710 INFO L130 PetriNetUnfolder]: 58946/78690 cut-off events. [2022-12-13 15:10:31,710 INFO L131 PetriNetUnfolder]: For 67117/67117 co-relation queries the response was YES. [2022-12-13 15:10:32,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206116 conditions, 78690 events. 58946/78690 cut-off events. For 67117/67117 co-relation queries the response was YES. Maximal size of possible extension queue 3311. Compared 517148 event pairs, 37311 based on Foata normal form. 0/68095 useless extension candidates. Maximal degree in co-relation 206078. Up to 53725 conditions per place. [2022-12-13 15:10:32,339 INFO L137 encePairwiseOnDemand]: 493/500 looper letters, 144 selfloop transitions, 37 changer transitions 0/187 dead transitions. [2022-12-13 15:10:32,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 187 transitions, 1401 flow [2022-12-13 15:10:32,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:10:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:10:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1885 transitions. [2022-12-13 15:10:32,344 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41888888888888887 [2022-12-13 15:10:32,344 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1885 transitions. [2022-12-13 15:10:32,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1885 transitions. [2022-12-13 15:10:32,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:32,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1885 transitions. [2022-12-13 15:10:32,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 209.44444444444446) internal successors, (1885), 9 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:32,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 500.0) internal successors, (5000), 10 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:32,351 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 500.0) internal successors, (5000), 10 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:32,351 INFO L175 Difference]: Start difference. First operand has 104 places, 97 transitions, 748 flow. Second operand 9 states and 1885 transitions. [2022-12-13 15:10:32,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 187 transitions, 1401 flow [2022-12-13 15:10:32,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 187 transitions, 1358 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-12-13 15:10:32,453 INFO L231 Difference]: Finished difference. Result has 112 places, 99 transitions, 820 flow [2022-12-13 15:10:32,454 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=820, PETRI_PLACES=112, PETRI_TRANSITIONS=99} [2022-12-13 15:10:32,454 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 41 predicate places. [2022-12-13 15:10:32,454 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 99 transitions, 820 flow [2022-12-13 15:10:32,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 195.875) internal successors, (1567), 8 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:32,455 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:32,455 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:10:32,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:32,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:32,656 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:10:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:32,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1781654028, now seen corresponding path program 1 times [2022-12-13 15:10:32,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:10:32,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480041392] [2022-12-13 15:10:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:32,659 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 15:10:32,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:10:32,662 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:32,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:32,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 15:10:32,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:10:32,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:10:32,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:10:32,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:10:32,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:10:32,997 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 15:10:32,997 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-12-13 15:10:33,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-13 15:10:33,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:10:33,045 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 15:10:33,173 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 15:10:33,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:10:33,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:10:33,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480041392] [2022-12-13 15:10:33,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480041392] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:10:33,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:10:33,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:10:33,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57430643] [2022-12-13 15:10:33,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:10:33,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:10:33,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:10:33,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:10:33,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:10:33,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 500 [2022-12-13 15:10:33,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 99 transitions, 820 flow. Second operand has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:33,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:33,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 500 [2022-12-13 15:10:33,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:42,193 INFO L130 PetriNetUnfolder]: 54788/73134 cut-off events. [2022-12-13 15:10:42,193 INFO L131 PetriNetUnfolder]: For 99512/99512 co-relation queries the response was YES. [2022-12-13 15:10:42,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206779 conditions, 73134 events. 54788/73134 cut-off events. For 99512/99512 co-relation queries the response was YES. Maximal size of possible extension queue 3024. Compared 476624 event pairs, 34775 based on Foata normal form. 0/68792 useless extension candidates. Maximal degree in co-relation 206740. Up to 70231 conditions per place. [2022-12-13 15:10:42,761 INFO L137 encePairwiseOnDemand]: 497/500 looper letters, 90 selfloop transitions, 1 changer transitions 0/97 dead transitions. [2022-12-13 15:10:42,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 97 transitions, 998 flow [2022-12-13 15:10:42,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:10:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:10:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2022-12-13 15:10:42,764 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.448 [2022-12-13 15:10:42,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2022-12-13 15:10:42,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2022-12-13 15:10:42,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:42,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2022-12-13 15:10:42,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:42,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:42,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:42,767 INFO L175 Difference]: Start difference. First operand has 112 places, 99 transitions, 820 flow. Second operand 3 states and 672 transitions. [2022-12-13 15:10:42,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 97 transitions, 998 flow [2022-12-13 15:10:42,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 97 transitions, 890 flow, removed 20 selfloop flow, removed 5 redundant places. [2022-12-13 15:10:42,887 INFO L231 Difference]: Finished difference. Result has 107 places, 97 transitions, 710 flow [2022-12-13 15:10:42,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=710, PETRI_PLACES=107, PETRI_TRANSITIONS=97} [2022-12-13 15:10:42,888 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2022-12-13 15:10:42,888 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 97 transitions, 710 flow [2022-12-13 15:10:42,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:42,888 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:42,888 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:10:42,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 15:10:43,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:43,090 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:10:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:43,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1781654030, now seen corresponding path program 1 times [2022-12-13 15:10:43,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:10:43,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440492557] [2022-12-13 15:10:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:43,093 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 15:10:43,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:10:43,096 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:43,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:43,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:10:43,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:10:43,330 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-12-13 15:10:43,331 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 4 case distinctions, treesize of input 40 treesize of output 55 [2022-12-13 15:10:43,382 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 15:10:43,383 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 15:10:43,413 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 15:10:43,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:10:43,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:10:43,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440492557] [2022-12-13 15:10:43,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440492557] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:10:43,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:10:43,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:10:43,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418071879] [2022-12-13 15:10:43,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:10:43,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:10:43,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:10:43,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:10:43,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:10:43,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 500 [2022-12-13 15:10:43,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 97 transitions, 710 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:43,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:43,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 500 [2022-12-13 15:10:43,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:51,465 INFO L130 PetriNetUnfolder]: 46551/62124 cut-off events. [2022-12-13 15:10:51,465 INFO L131 PetriNetUnfolder]: For 88284/88284 co-relation queries the response was YES. [2022-12-13 15:10:51,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177272 conditions, 62124 events. 46551/62124 cut-off events. For 88284/88284 co-relation queries the response was YES. Maximal size of possible extension queue 2720. Compared 399080 event pairs, 29629 based on Foata normal form. 0/59312 useless extension candidates. Maximal degree in co-relation 177233. Up to 59506 conditions per place. [2022-12-13 15:10:51,945 INFO L137 encePairwiseOnDemand]: 497/500 looper letters, 88 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2022-12-13 15:10:51,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 95 transitions, 884 flow [2022-12-13 15:10:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:10:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:10:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-12-13 15:10:51,947 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44266666666666665 [2022-12-13 15:10:51,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-12-13 15:10:51,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-12-13 15:10:51,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:51,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-12-13 15:10:51,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:51,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:51,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:51,950 INFO L175 Difference]: Start difference. First operand has 107 places, 97 transitions, 710 flow. Second operand 3 states and 664 transitions. [2022-12-13 15:10:51,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 95 transitions, 884 flow [2022-12-13 15:10:52,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 95 transitions, 883 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:10:52,053 INFO L231 Difference]: Finished difference. Result has 106 places, 95 transitions, 707 flow [2022-12-13 15:10:52,054 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=707, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2022-12-13 15:10:52,054 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 35 predicate places. [2022-12-13 15:10:52,054 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 707 flow [2022-12-13 15:10:52,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:52,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:52,054 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 15:10:52,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:52,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:52,255 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:10:52,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:52,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1112431103, now seen corresponding path program 2 times [2022-12-13 15:10:52,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:10:52,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605139171] [2022-12-13 15:10:52,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:10:52,256 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 15:10:52,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:10:52,257 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:52,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:10:52,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 15:10:52,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:10:52,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 15:10:52,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:10:52,619 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:10:52,619 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:10:52,880 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 15:10:52,880 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 15:10:53,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:10:53,053 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 15:10:53,068 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 15:10:53,068 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 15:10:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 15:10:53,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:10:53,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:10:53,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605139171] [2022-12-13 15:10:53,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605139171] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:10:53,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:10:53,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:10:53,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585550587] [2022-12-13 15:10:53,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:10:53,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:10:53,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:10:53,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:10:53,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:10:53,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 500 [2022-12-13 15:10:53,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 707 flow. Second operand has 4 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:10:53,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:53,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 500 [2022-12-13 15:10:53,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:11:00,546 INFO L130 PetriNetUnfolder]: 37828/51031 cut-off events. [2022-12-13 15:11:00,546 INFO L131 PetriNetUnfolder]: For 73215/73215 co-relation queries the response was YES. [2022-12-13 15:11:00,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135613 conditions, 51031 events. 37828/51031 cut-off events. For 73215/73215 co-relation queries the response was YES. Maximal size of possible extension queue 2276. Compared 328665 event pairs, 24177 based on Foata normal form. 2729/51466 useless extension candidates. Maximal degree in co-relation 135573. Up to 48828 conditions per place. [2022-12-13 15:11:00,969 INFO L137 encePairwiseOnDemand]: 496/500 looper letters, 75 selfloop transitions, 12 changer transitions 0/93 dead transitions. [2022-12-13 15:11:00,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 93 transitions, 861 flow [2022-12-13 15:11:00,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:11:00,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:11:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 835 transitions. [2022-12-13 15:11:00,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4175 [2022-12-13 15:11:00,972 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 835 transitions. [2022-12-13 15:11:00,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 835 transitions. [2022-12-13 15:11:00,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:11:00,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 835 transitions. [2022-12-13 15:11:00,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 208.75) internal successors, (835), 4 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:00,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:00,975 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:00,975 INFO L175 Difference]: Start difference. First operand has 106 places, 95 transitions, 707 flow. Second operand 4 states and 835 transitions. [2022-12-13 15:11:00,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 93 transitions, 861 flow [2022-12-13 15:11:01,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 93 transitions, 853 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 15:11:01,027 INFO L231 Difference]: Finished difference. Result has 104 places, 93 transitions, 703 flow [2022-12-13 15:11:01,028 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=703, PETRI_PLACES=104, PETRI_TRANSITIONS=93} [2022-12-13 15:11:01,028 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 33 predicate places. [2022-12-13 15:11:01,028 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 93 transitions, 703 flow [2022-12-13 15:11:01,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:01,028 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:11:01,028 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 15:11:01,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 15:11:01,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:11:01,230 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:11:01,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:11:01,231 INFO L85 PathProgramCache]: Analyzing trace with hash -821510127, now seen corresponding path program 3 times [2022-12-13 15:11:01,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:11:01,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939626097] [2022-12-13 15:11:01,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:11:01,232 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 15:11:01,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:11:01,235 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:11:01,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:11:01,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 15:11:01,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:11:01,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 15:11:01,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:11:01,679 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:11:01,679 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:11:02,344 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 15:11:02,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:11:05,502 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 15:11:05,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:11:05,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939626097] [2022-12-13 15:11:05,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939626097] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:11:05,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:11:05,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 15:11:05,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017359496] [2022-12-13 15:11:05,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:11:05,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:11:05,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:11:05,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:11:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:11:31,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 500 [2022-12-13 15:11:31,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 93 transitions, 703 flow. Second operand has 24 states, 24 states have (on average 201.0) internal successors, (4824), 24 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:11:31,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:11:31,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 500 [2022-12-13 15:11:31,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:11:41,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:11:43,958 WARN L539 Checker$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 15:11:45,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:11:47,963 WARN L539 Checker$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 15:11:49,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:11:51,969 WARN L539 Checker$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 15:11:53,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:11:55,999 WARN L539 Checker$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 15:11:57,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:11:59,348 WARN L539 Checker$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 15:12:22,884 INFO L130 PetriNetUnfolder]: 65203/87782 cut-off events. [2022-12-13 15:12:22,884 INFO L131 PetriNetUnfolder]: For 86672/86672 co-relation queries the response was YES. [2022-12-13 15:12:23,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234300 conditions, 87782 events. 65203/87782 cut-off events. For 86672/86672 co-relation queries the response was YES. Maximal size of possible extension queue 3187. Compared 586832 event pairs, 41496 based on Foata normal form. 28/87748 useless extension candidates. Maximal degree in co-relation 234261. Up to 24403 conditions per place. [2022-12-13 15:12:23,629 INFO L137 encePairwiseOnDemand]: 493/500 looper letters, 376 selfloop transitions, 65 changer transitions 0/447 dead transitions. [2022-12-13 15:12:23,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 447 transitions, 2949 flow [2022-12-13 15:12:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 15:12:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 15:12:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5221 transitions. [2022-12-13 15:12:23,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4350833333333333 [2022-12-13 15:12:23,637 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5221 transitions. [2022-12-13 15:12:23,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5221 transitions. [2022-12-13 15:12:23,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:12:23,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5221 transitions. [2022-12-13 15:12:23,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 217.54166666666666) internal successors, (5221), 24 states have internal predecessors, (5221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:23,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 500.0) internal successors, (12500), 25 states have internal predecessors, (12500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:23,653 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 500.0) internal successors, (12500), 25 states have internal predecessors, (12500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:23,653 INFO L175 Difference]: Start difference. First operand has 104 places, 93 transitions, 703 flow. Second operand 24 states and 5221 transitions. [2022-12-13 15:12:23,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 447 transitions, 2949 flow [2022-12-13 15:12:23,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 447 transitions, 2924 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:12:23,761 INFO L231 Difference]: Finished difference. Result has 139 places, 124 transitions, 1185 flow [2022-12-13 15:12:23,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1185, PETRI_PLACES=139, PETRI_TRANSITIONS=124} [2022-12-13 15:12:23,761 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 68 predicate places. [2022-12-13 15:12:23,762 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 124 transitions, 1185 flow [2022-12-13 15:12:23,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 201.0) internal successors, (4824), 24 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:23,762 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:12:23,762 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:12:23,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:12:23,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:12:23,964 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:12:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:23,965 INFO L85 PathProgramCache]: Analyzing trace with hash 407960430, now seen corresponding path program 2 times [2022-12-13 15:12:23,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:12:23,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686161342] [2022-12-13 15:12:23,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:12:23,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:12:23,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:12:23,969 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:12:23,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:12:24,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 15:12:24,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:12:24,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 15:12:24,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:12:24,109 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 15:12:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 15:12:24,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:12:24,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:12:24,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686161342] [2022-12-13 15:12:24,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686161342] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:12:24,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:12:24,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:12:24,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777272142] [2022-12-13 15:12:24,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:24,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:12:24,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:12:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:12:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:12:24,527 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 500 [2022-12-13 15:12:24,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 124 transitions, 1185 flow. Second operand has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:24,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:12:24,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 500 [2022-12-13 15:12:24,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:12:32,134 INFO L130 PetriNetUnfolder]: 41776/57527 cut-off events. [2022-12-13 15:12:32,134 INFO L131 PetriNetUnfolder]: For 65798/65798 co-relation queries the response was YES. [2022-12-13 15:12:32,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135558 conditions, 57527 events. 41776/57527 cut-off events. For 65798/65798 co-relation queries the response was YES. Maximal size of possible extension queue 2047. Compared 384913 event pairs, 26457 based on Foata normal form. 7677/62910 useless extension candidates. Maximal degree in co-relation 135505. Up to 54449 conditions per place. [2022-12-13 15:12:32,717 INFO L137 encePairwiseOnDemand]: 496/500 looper letters, 70 selfloop transitions, 46 changer transitions 0/122 dead transitions. [2022-12-13 15:12:32,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 122 transitions, 1401 flow [2022-12-13 15:12:32,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:12:32,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:12:32,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 857 transitions. [2022-12-13 15:12:32,720 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4285 [2022-12-13 15:12:32,720 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 857 transitions. [2022-12-13 15:12:32,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 857 transitions. [2022-12-13 15:12:32,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:12:32,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 857 transitions. [2022-12-13 15:12:32,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:32,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:32,723 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:32,723 INFO L175 Difference]: Start difference. First operand has 139 places, 124 transitions, 1185 flow. Second operand 4 states and 857 transitions. [2022-12-13 15:12:32,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 122 transitions, 1401 flow [2022-12-13 15:12:32,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 122 transitions, 1261 flow, removed 36 selfloop flow, removed 8 redundant places. [2022-12-13 15:12:32,764 INFO L231 Difference]: Finished difference. Result has 132 places, 122 transitions, 1121 flow [2022-12-13 15:12:32,764 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1121, PETRI_PLACES=132, PETRI_TRANSITIONS=122} [2022-12-13 15:12:32,765 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 61 predicate places. [2022-12-13 15:12:32,765 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 122 transitions, 1121 flow [2022-12-13 15:12:32,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:32,765 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:12:32,765 INFO L209 CegarLoopForPetriNet]: trace histogram [13, 1, 1, 1] [2022-12-13 15:12:32,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:12:32,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:12:32,967 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:12:32,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:32,968 INFO L85 PathProgramCache]: Analyzing trace with hash -498709509, now seen corresponding path program 1 times [2022-12-13 15:12:32,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:12:32,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379448899] [2022-12-13 15:12:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:32,970 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 15:12:32,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:12:32,973 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:12:32,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:12:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:33,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 15:12:33,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:12:33,130 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 15:12:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:34,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:12:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:39,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:12:39,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379448899] [2022-12-13 15:12:39,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379448899] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:12:39,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:12:39,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2022-12-13 15:12:39,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770106163] [2022-12-13 15:12:39,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:12:39,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:12:39,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:12:39,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:12:39,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2022-12-13 15:13:27,528 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 500 [2022-12-13 15:13:27,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 122 transitions, 1121 flow. Second operand has 30 states, 30 states have (on average 199.03333333333333) internal successors, (5971), 30 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:13:27,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:13:27,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 500 [2022-12-13 15:13:27,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:13:44,413 WARN L233 SmtUtils]: Spent 10.08s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:13:47,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:13:48,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:13:50,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:13:52,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:13:54,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:13:56,643 WARN L539 Checker$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 15:13:58,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:14:00,649 WARN L539 Checker$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 15:14:02,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:14:04,654 WARN L539 Checker$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 15:14:06,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:14:08,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:14:10,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:14:19,091 WARN L233 SmtUtils]: Spent 7.32s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:14:26,243 WARN L233 SmtUtils]: Spent 5.77s on a formula simplification that was a NOOP. DAG size: 135 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:15:13,581 INFO L130 PetriNetUnfolder]: 89320/122889 cut-off events. [2022-12-13 15:15:13,581 INFO L131 PetriNetUnfolder]: For 50510/50510 co-relation queries the response was YES. [2022-12-13 15:15:14,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288835 conditions, 122889 events. 89320/122889 cut-off events. For 50510/50510 co-relation queries the response was YES. Maximal size of possible extension queue 2312. Compared 848399 event pairs, 56235 based on Foata normal form. 60/122887 useless extension candidates. Maximal degree in co-relation 288784. Up to 24597 conditions per place. [2022-12-13 15:15:14,777 INFO L137 encePairwiseOnDemand]: 494/500 looper letters, 742 selfloop transitions, 77 changer transitions 0/825 dead transitions. [2022-12-13 15:15:14,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 825 transitions, 5559 flow [2022-12-13 15:15:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 15:15:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 15:15:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6696 transitions. [2022-12-13 15:15:14,786 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4464 [2022-12-13 15:15:14,786 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6696 transitions. [2022-12-13 15:15:14,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6696 transitions. [2022-12-13 15:15:14,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:15:14,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6696 transitions. [2022-12-13 15:15:14,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 223.2) internal successors, (6696), 30 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:15:14,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 500.0) internal successors, (15500), 31 states have internal predecessors, (15500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:15:14,803 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 500.0) internal successors, (15500), 31 states have internal predecessors, (15500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:15:14,803 INFO L175 Difference]: Start difference. First operand has 132 places, 122 transitions, 1121 flow. Second operand 30 states and 6696 transitions. [2022-12-13 15:15:14,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 825 transitions, 5559 flow [2022-12-13 15:15:14,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 825 transitions, 5424 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:15:14,884 INFO L231 Difference]: Finished difference. Result has 175 places, 143 transitions, 1559 flow [2022-12-13 15:15:14,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1559, PETRI_PLACES=175, PETRI_TRANSITIONS=143} [2022-12-13 15:15:14,885 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 104 predicate places. [2022-12-13 15:15:14,885 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 143 transitions, 1559 flow [2022-12-13 15:15:14,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 199.03333333333333) internal successors, (5971), 30 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:15:14,886 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:15:14,886 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2022-12-13 15:15:14,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:15:15,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:15:15,087 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 15:15:15,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:15:15,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1637046865, now seen corresponding path program 4 times [2022-12-13 15:15:15,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:15:15,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283048698] [2022-12-13 15:15:15,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:15:15,090 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:15:15,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:15:15,093 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:15:15,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea463d8-5d3d-4663-975c-f5846354ec01/bin/uautomizer-uyxdKDjOR8/mathsat -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 15:15:15,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:15:15,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:15:15,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 15:15:15,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:15:15,538 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 15:15:15,538 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 15:15:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:15:17,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:15:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:15:29,707 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:15:29,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283048698] [2022-12-13 15:15:29,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283048698] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:15:29,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:15:29,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2022-12-13 15:15:29,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862905394] [2022-12-13 15:15:29,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:15:29,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 15:15:29,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:15:29,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 15:15:29,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 15:17:28,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 500 [2022-12-13 15:17:28,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 143 transitions, 1559 flow. Second operand has 48 states, 48 states have (on average 201.0) internal successors, (9648), 48 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:17:28,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:17:28,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 500 [2022-12-13 15:17:28,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:18:08,608 WARN L233 SmtUtils]: Spent 17.37s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:18:22,981 WARN L233 SmtUtils]: Spent 11.05s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:18:43,006 WARN L233 SmtUtils]: Spent 16.68s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:18:46,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:18:48,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:18:50,206 WARN L539 Checker$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 15:18:52,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:18:54,213 WARN L539 Checker$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 15:18:56,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:18:58,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:19:00,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:19:02,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:19:04,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:19:06,251 WARN L539 Checker$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 15:19:08,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:19:10,258 WARN L539 Checker$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 15:19:12,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:19:14,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:19:16,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:19:18,272 WARN L539 Checker$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 15:19:20,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:19:22,278 WARN L539 Checker$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 15:19:24,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:19:26,285 WARN L539 Checker$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 15:19:28,288 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 15:19:44,007 WARN L233 SmtUtils]: Spent 13.55s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:19:57,360 WARN L233 SmtUtils]: Spent 9.99s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:20:08,449 WARN L233 SmtUtils]: Spent 7.81s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)