./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/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_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/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_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/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 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --- 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 13:13:14,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:13:14,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:13:14,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:13:14,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:13:14,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:13:14,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:13:14,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:13:14,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:13:14,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:13:14,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:13:14,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:13:14,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:13:14,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:13:14,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:13:14,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:13:14,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:13:14,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:13:14,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:13:14,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:13:14,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:13:14,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:13:14,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:13:14,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:13:14,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:13:14,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:13:14,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:13:14,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:13:14,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:13:14,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:13:14,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:13:14,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:13:14,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:13:14,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:13:14,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:13:14,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:13:14,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:13:14,106 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:13:14,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:13:14,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:13:14,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:13:14,108 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 13:13:14,128 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:13:14,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:13:14,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:13:14,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:13:14,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:13:14,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:13:14,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:13:14,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:13:14,131 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:13:14,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:13:14,131 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:13:14,132 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:13:14,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:13:14,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:13:14,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:13:14,132 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:13:14,133 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:13:14,133 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:13:14,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:13:14,133 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:13:14,133 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:13:14,133 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:13:14,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:13:14,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:13:14,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:13:14,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:13:14,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:13:14,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:13:14,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:13:14,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:13:14,135 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:13:14,135 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:13:14,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:13:14,136 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:13:14,136 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_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e [2022-12-13 13:13:14,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:13:14,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:13:14,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:13:14,321 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:13:14,321 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:13:14,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-12-13 13:13:16,866 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:13:17,029 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:13:17,029 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-12-13 13:13:17,036 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/data/eb523d34e/7ab90502199248b38aacf841d60e9eee/FLAG84354cc75 [2022-12-13 13:13:17,047 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/data/eb523d34e/7ab90502199248b38aacf841d60e9eee [2022-12-13 13:13:17,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:13:17,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:13:17,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:13:17,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:13:17,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:13:17,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:13:17" (1/1) ... [2022-12-13 13:13:17,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c0bc43d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:17, skipping insertion in model container [2022-12-13 13:13:17,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:13:17" (1/1) ... [2022-12-13 13:13:17,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:13:17,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:13:17,217 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_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-12-13 13:13:17,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:13:17,236 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 13:13:17,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1b3aed33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:17, skipping insertion in model container [2022-12-13 13:13:17,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:13:17,237 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 13:13:17,239 INFO L158 Benchmark]: Toolchain (without parser) took 187.43ms. Allocated memory is still 130.0MB. Free memory was 100.0MB in the beginning and 90.1MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 13:13:17,239 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 130.0MB. Free memory is still 72.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:13:17,240 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.74ms. Allocated memory is still 130.0MB. Free memory was 100.0MB in the beginning and 90.1MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 13:13:17,241 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 130.0MB. Free memory is still 72.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 185.74ms. Allocated memory is still 130.0MB. Free memory was 100.0MB in the beginning and 90.1MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 103]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/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_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/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_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/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 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --- 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 13:13:18,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:13:18,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:13:18,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:13:18,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:13:18,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:13:18,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:13:18,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:13:18,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:13:18,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:13:18,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:13:18,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:13:18,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:13:18,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:13:18,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:13:18,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:13:18,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:13:18,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:13:18,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:13:18,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:13:18,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:13:18,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:13:18,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:13:18,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:13:18,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:13:18,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:13:18,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:13:18,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:13:18,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:13:18,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:13:18,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:13:18,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:13:18,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:13:18,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:13:18,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:13:18,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:13:18,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:13:18,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:13:18,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:13:18,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:13:18,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:13:18,633 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 13:13:18,651 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:13:18,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:13:18,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:13:18,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:13:18,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:13:18,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:13:18,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:13:18,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:13:18,653 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:13:18,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:13:18,654 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:13:18,654 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:13:18,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:13:18,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:13:18,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:13:18,655 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:13:18,655 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:13:18,655 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:13:18,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:13:18,656 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:13:18,656 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 13:13:18,656 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 13:13:18,656 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:13:18,656 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:13:18,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:13:18,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:13:18,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:13:18,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:13:18,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:13:18,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:13:18,658 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 13:13:18,658 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 13:13:18,658 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:13:18,658 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:13:18,658 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:13:18,659 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 13:13:18,659 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:13:18,659 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_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e [2022-12-13 13:13:18,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:13:18,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:13:18,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:13:18,907 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:13:18,907 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:13:18,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-12-13 13:13:21,521 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:13:21,699 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:13:21,699 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-12-13 13:13:21,706 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/data/aa91e0e90/fbba0af249544c05a37f489135be6844/FLAG17b5668a2 [2022-12-13 13:13:21,721 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/data/aa91e0e90/fbba0af249544c05a37f489135be6844 [2022-12-13 13:13:21,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:13:21,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:13:21,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:13:21,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:13:21,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:13:21,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:13:21" (1/1) ... [2022-12-13 13:13:21,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1410f4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:21, skipping insertion in model container [2022-12-13 13:13:21,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:13:21" (1/1) ... [2022-12-13 13:13:21,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:13:21,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:13:21,891 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_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-12-13 13:13:21,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:13:21,911 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 13:13:21,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:13:21,929 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_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-12-13 13:13:21,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:13:21,938 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:13:21,959 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_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-12-13 13:13:21,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:13:21,979 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:13:21,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:21 WrapperNode [2022-12-13 13:13:21,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:13:21,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:13:21,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:13:21,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:13:21,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:21" (1/1) ... [2022-12-13 13:13:21,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:21" (1/1) ... [2022-12-13 13:13:22,019 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 152 [2022-12-13 13:13:22,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:13:22,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:13:22,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:13:22,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:13:22,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:21" (1/1) ... [2022-12-13 13:13:22,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:21" (1/1) ... [2022-12-13 13:13:22,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:21" (1/1) ... [2022-12-13 13:13:22,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:21" (1/1) ... [2022-12-13 13:13:22,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:21" (1/1) ... [2022-12-13 13:13:22,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:21" (1/1) ... [2022-12-13 13:13:22,052 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:21" (1/1) ... [2022-12-13 13:13:22,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:21" (1/1) ... [2022-12-13 13:13:22,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:13:22,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:13:22,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:13:22,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:13:22,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:21" (1/1) ... [2022-12-13 13:13:22,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:13:22,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:13:22,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:13:22,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:13:22,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:13:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 13:13:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:13:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 13:13:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 13:13:22,128 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 13:13:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 13:13:22,128 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 13:13:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 13:13:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:13:22,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:13:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:13:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 13:13:22,130 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 13:13:22,227 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:13:22,229 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:13:22,604 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:13:22,612 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:13:22,612 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 13:13:22,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:13:22 BoogieIcfgContainer [2022-12-13 13:13:22,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:13:22,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:13:22,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:13:22,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:13:22,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:13:21" (1/3) ... [2022-12-13 13:13:22,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192f012a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:13:22, skipping insertion in model container [2022-12-13 13:13:22,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:21" (2/3) ... [2022-12-13 13:13:22,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192f012a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:13:22, skipping insertion in model container [2022-12-13 13:13:22,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:13:22" (3/3) ... [2022-12-13 13:13:22,623 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2022-12-13 13:13:22,645 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:13:22,645 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-12-13 13:13:22,645 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:13:22,710 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 13:13:22,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 221 transitions, 458 flow [2022-12-13 13:13:22,791 INFO L130 PetriNetUnfolder]: 16/219 cut-off events. [2022-12-13 13:13:22,791 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:13:22,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 219 events. 16/219 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 273 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2022-12-13 13:13:22,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 221 transitions, 458 flow [2022-12-13 13:13:22,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 214 transitions, 440 flow [2022-12-13 13:13:22,803 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:13:22,811 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 205 places, 214 transitions, 440 flow [2022-12-13 13:13:22,813 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 205 places, 214 transitions, 440 flow [2022-12-13 13:13:22,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 214 transitions, 440 flow [2022-12-13 13:13:22,842 INFO L130 PetriNetUnfolder]: 16/214 cut-off events. [2022-12-13 13:13:22,842 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:13:22,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 214 events. 16/214 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 254 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2022-12-13 13:13:22,845 INFO L119 LiptonReduction]: Number of co-enabled transitions 5052 [2022-12-13 13:13:48,433 INFO L134 LiptonReduction]: Checked pairs total: 4996 [2022-12-13 13:13:48,433 INFO L136 LiptonReduction]: Total number of compositions: 250 [2022-12-13 13:13:48,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:13:48,448 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;@3e2e91bf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:13:48,448 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-12-13 13:13:48,449 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 13:13:48,450 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:13:48,450 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:48,450 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:13:48,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:13:48,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:48,454 INFO L85 PathProgramCache]: Analyzing trace with hash 28125, now seen corresponding path program 1 times [2022-12-13 13:13:48,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:13:48,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319518376] [2022-12-13 13:13:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:48,463 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 13:13:48,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:13:48,464 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:48,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:48,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:13:48,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:48,668 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 13:13:48,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 13:13:48,693 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 13:13:48,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:13:48,694 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:13:48,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319518376] [2022-12-13 13:13:48,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319518376] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:13:48,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:13:48,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:13:48,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706142448] [2022-12-13 13:13:48,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:13:48,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:13:48,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:13:48,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:13:48,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:13:48,932 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 471 [2022-12-13 13:13:48,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:48,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:13:48,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 471 [2022-12-13 13:13:48,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:13:49,493 INFO L130 PetriNetUnfolder]: 1053/1492 cut-off events. [2022-12-13 13:13:49,493 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-12-13 13:13:49,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3018 conditions, 1492 events. 1053/1492 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 7198 event pairs, 502 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 1302. Up to 742 conditions per place. [2022-12-13 13:13:49,503 INFO L137 encePairwiseOnDemand]: 464/471 looper letters, 60 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2022-12-13 13:13:49,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 64 transitions, 276 flow [2022-12-13 13:13:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:13:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:13:49,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 662 transitions. [2022-12-13 13:13:49,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46850672328379334 [2022-12-13 13:13:49,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 662 transitions. [2022-12-13 13:13:49,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 662 transitions. [2022-12-13 13:13:49,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:13:49,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 662 transitions. [2022-12-13 13:13:49,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:49,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:49,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:49,535 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 88 flow. Second operand 3 states and 662 transitions. [2022-12-13 13:13:49,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 64 transitions, 276 flow [2022-12-13 13:13:49,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 64 transitions, 260 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 13:13:49,542 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 84 flow [2022-12-13 13:13:49,543 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2022-12-13 13:13:49,547 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2022-12-13 13:13:49,547 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 84 flow [2022-12-13 13:13:49,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:49,548 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:49,548 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:13:49,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:49,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:49,749 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:13:49,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:49,751 INFO L85 PathProgramCache]: Analyzing trace with hash 28124, now seen corresponding path program 1 times [2022-12-13 13:13:49,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:13:49,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101714966] [2022-12-13 13:13:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:49,752 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 13:13:49,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:13:49,755 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:49,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:49,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:13:49,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:49,922 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 13:13:49,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 13:13:49,933 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 13:13:49,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:13:49,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:13:49,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101714966] [2022-12-13 13:13:49,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101714966] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:13:49,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:13:49,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:13:49,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299528251] [2022-12-13 13:13:49,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:13:49,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:13:49,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:13:49,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:13:49,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:13:50,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 471 [2022-12-13 13:13:50,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:50,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:13:50,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 471 [2022-12-13 13:13:50,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:13:50,418 INFO L130 PetriNetUnfolder]: 1053/1490 cut-off events. [2022-12-13 13:13:50,418 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:13:50,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2989 conditions, 1490 events. 1053/1490 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 7269 event pairs, 502 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 1492. Up to 1478 conditions per place. [2022-12-13 13:13:50,427 INFO L137 encePairwiseOnDemand]: 469/471 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2022-12-13 13:13:50,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 146 flow [2022-12-13 13:13:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:13:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:13:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2022-12-13 13:13:50,430 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44090587402689313 [2022-12-13 13:13:50,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2022-12-13 13:13:50,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2022-12-13 13:13:50,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:13:50,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2022-12-13 13:13:50,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:50,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:50,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:50,436 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 84 flow. Second operand 3 states and 623 transitions. [2022-12-13 13:13:50,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 146 flow [2022-12-13 13:13:50,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:13:50,438 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 82 flow [2022-12-13 13:13:50,438 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2022-12-13 13:13:50,439 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2022-12-13 13:13:50,439 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 82 flow [2022-12-13 13:13:50,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:50,439 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:50,439 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:13:50,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:50,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:50,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:13:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:50,641 INFO L85 PathProgramCache]: Analyzing trace with hash 28311, now seen corresponding path program 1 times [2022-12-13 13:13:50,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:13:50,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896795768] [2022-12-13 13:13:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:50,642 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 13:13:50,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:13:50,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:50,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:50,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 13:13:50,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:50,708 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 13:13:50,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:13:50,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:13:50,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896795768] [2022-12-13 13:13:50,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896795768] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:13:50,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:13:50,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:13:50,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797645372] [2022-12-13 13:13:50,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:13:50,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:13:50,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:13:50,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:13:50,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:13:50,739 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 471 [2022-12-13 13:13:50,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:50,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:13:50,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 471 [2022-12-13 13:13:50,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:13:51,028 INFO L130 PetriNetUnfolder]: 527/747 cut-off events. [2022-12-13 13:13:51,028 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 13:13:51,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1503 conditions, 747 events. 527/747 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 3171 event pairs, 251 based on Foata normal form. 1/186 useless extension candidates. Maximal degree in co-relation 1495. Up to 741 conditions per place. [2022-12-13 13:13:51,031 INFO L137 encePairwiseOnDemand]: 466/471 looper letters, 30 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2022-12-13 13:13:51,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 146 flow [2022-12-13 13:13:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:13:51,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:13:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2022-12-13 13:13:51,033 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4472753007784855 [2022-12-13 13:13:51,033 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2022-12-13 13:13:51,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2022-12-13 13:13:51,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:13:51,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2022-12-13 13:13:51,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:51,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:51,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:51,038 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 82 flow. Second operand 3 states and 632 transitions. [2022-12-13 13:13:51,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 146 flow [2022-12-13 13:13:51,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 143 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 13:13:51,039 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 91 flow [2022-12-13 13:13:51,039 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2022-12-13 13:13:51,039 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2022-12-13 13:13:51,040 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 91 flow [2022-12-13 13:13:51,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:51,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:51,040 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:13:51,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:51,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:51,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:13:51,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:51,244 INFO L85 PathProgramCache]: Analyzing trace with hash 876130, now seen corresponding path program 1 times [2022-12-13 13:13:51,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:13:51,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754255030] [2022-12-13 13:13:51,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:51,246 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 13:13:51,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:13:51,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:51,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:51,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 13:13:51,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:51,415 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 13:13:51,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 13:13:51,460 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 13:13:51,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:13:51,634 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 13:13:51,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:13:51,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754255030] [2022-12-13 13:13:51,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754255030] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:13:51,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:13:51,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 13:13:51,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351349484] [2022-12-13 13:13:51,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:13:51,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:13:51,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:13:51,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:13:51,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:13:52,287 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 471 [2022-12-13 13:13:52,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 91 flow. Second operand has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:52,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:13:52,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 471 [2022-12-13 13:13:52,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:13:53,052 INFO L130 PetriNetUnfolder]: 1059/1499 cut-off events. [2022-12-13 13:13:53,052 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:13:53,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3025 conditions, 1499 events. 1059/1499 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 7282 event pairs, 502 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 3015. Up to 744 conditions per place. [2022-12-13 13:13:53,056 INFO L137 encePairwiseOnDemand]: 465/471 looper letters, 58 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2022-12-13 13:13:53,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 71 transitions, 331 flow [2022-12-13 13:13:53,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:13:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:13:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1224 transitions. [2022-12-13 13:13:53,060 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43312101910828027 [2022-12-13 13:13:53,060 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1224 transitions. [2022-12-13 13:13:53,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1224 transitions. [2022-12-13 13:13:53,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:13:53,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1224 transitions. [2022-12-13 13:13:53,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:53,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 471.0) internal successors, (3297), 7 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:53,065 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 471.0) internal successors, (3297), 7 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:53,065 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 91 flow. Second operand 6 states and 1224 transitions. [2022-12-13 13:13:53,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 71 transitions, 331 flow [2022-12-13 13:13:53,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 71 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:13:53,067 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 185 flow [2022-12-13 13:13:53,067 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=185, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2022-12-13 13:13:53,067 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2022-12-13 13:13:53,067 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 185 flow [2022-12-13 13:13:53,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:53,068 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:53,068 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:13:53,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 13:13:53,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:53,269 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:13:53,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:53,269 INFO L85 PathProgramCache]: Analyzing trace with hash 876316, now seen corresponding path program 1 times [2022-12-13 13:13:53,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:13:53,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851277161] [2022-12-13 13:13:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:53,270 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 13:13:53,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:13:53,271 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:53,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:53,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:13:53,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:53,358 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-12-13 13:13:53,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-12-13 13:13:53,380 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 13:13:53,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:13:53,380 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:13:53,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851277161] [2022-12-13 13:13:53,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851277161] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:13:53,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:13:53,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:13:53,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119969462] [2022-12-13 13:13:53,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:13:53,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:13:53,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:13:53,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:13:53,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:13:53,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 471 [2022-12-13 13:13:53,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:53,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:13:53,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 471 [2022-12-13 13:13:53,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:13:53,757 INFO L130 PetriNetUnfolder]: 799/1157 cut-off events. [2022-12-13 13:13:53,757 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-13 13:13:53,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2367 conditions, 1157 events. 799/1157 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 5551 event pairs, 378 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 2353. Up to 1145 conditions per place. [2022-12-13 13:13:53,761 INFO L137 encePairwiseOnDemand]: 468/471 looper letters, 36 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2022-12-13 13:13:53,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 233 flow [2022-12-13 13:13:53,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:13:53,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:13:53,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 613 transitions. [2022-12-13 13:13:53,767 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4338287331917905 [2022-12-13 13:13:53,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 613 transitions. [2022-12-13 13:13:53,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 613 transitions. [2022-12-13 13:13:53,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:13:53,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 613 transitions. [2022-12-13 13:13:53,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:53,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:53,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:53,770 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 185 flow. Second operand 3 states and 613 transitions. [2022-12-13 13:13:53,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 233 flow [2022-12-13 13:13:53,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 215 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-13 13:13:53,771 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 143 flow [2022-12-13 13:13:53,771 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2022-12-13 13:13:53,772 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2022-12-13 13:13:53,772 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 143 flow [2022-12-13 13:13:53,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:53,772 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:53,772 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:13:53,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:53,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:53,974 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:13:53,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:53,975 INFO L85 PathProgramCache]: Analyzing trace with hash 876317, now seen corresponding path program 1 times [2022-12-13 13:13:53,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:13:53,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993111439] [2022-12-13 13:13:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:53,977 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 13:13:53,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:13:53,980 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:53,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:54,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 13:13:54,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:54,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:13:54,140 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-12-13 13:13:54,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2022-12-13 13:13:54,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 13:13:54,213 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 13:13:54,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:13:54,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:13:54,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993111439] [2022-12-13 13:13:54,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993111439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:13:54,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:13:54,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:13:54,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220527415] [2022-12-13 13:13:54,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:13:54,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:13:54,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:13:54,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:13:54,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:13:54,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 471 [2022-12-13 13:13:54,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:54,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:13:54,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 471 [2022-12-13 13:13:54,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:13:54,602 INFO L130 PetriNetUnfolder]: 539/815 cut-off events. [2022-12-13 13:13:54,602 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-12-13 13:13:54,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1666 conditions, 815 events. 539/815 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 3888 event pairs, 254 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 1651. Up to 803 conditions per place. [2022-12-13 13:13:54,604 INFO L137 encePairwiseOnDemand]: 468/471 looper letters, 32 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2022-12-13 13:13:54,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 35 transitions, 187 flow [2022-12-13 13:13:54,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:13:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:13:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2022-12-13 13:13:54,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43878273177636234 [2022-12-13 13:13:54,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2022-12-13 13:13:54,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2022-12-13 13:13:54,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:13:54,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2022-12-13 13:13:54,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:54,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:54,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:54,609 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 143 flow. Second operand 3 states and 620 transitions. [2022-12-13 13:13:54,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 35 transitions, 187 flow [2022-12-13 13:13:54,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 35 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:13:54,610 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 122 flow [2022-12-13 13:13:54,610 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2022-12-13 13:13:54,611 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2022-12-13 13:13:54,611 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 122 flow [2022-12-13 13:13:54,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:54,611 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:54,611 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:13:54,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:54,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:54,813 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:13:54,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:54,814 INFO L85 PathProgramCache]: Analyzing trace with hash 842158116, now seen corresponding path program 1 times [2022-12-13 13:13:54,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:13:54,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065401624] [2022-12-13 13:13:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:54,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:13:54,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:13:54,819 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:54,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:54,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 13:13:54,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:54,990 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 13:13:54,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2022-12-13 13:13:55,008 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 13:13:55,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:13:55,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:13:55,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065401624] [2022-12-13 13:13:55,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065401624] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:13:55,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:13:55,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:13:55,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897636671] [2022-12-13 13:13:55,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:13:55,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:13:55,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:13:55,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:13:55,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:13:55,097 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 471 [2022-12-13 13:13:55,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:55,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:13:55,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 471 [2022-12-13 13:13:55,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:13:55,317 INFO L130 PetriNetUnfolder]: 497/747 cut-off events. [2022-12-13 13:13:55,317 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-12-13 13:13:55,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1531 conditions, 747 events. 497/747 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 3401 event pairs, 234 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 1515. Up to 735 conditions per place. [2022-12-13 13:13:55,320 INFO L137 encePairwiseOnDemand]: 468/471 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2022-12-13 13:13:55,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 180 flow [2022-12-13 13:13:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:13:55,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:13:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2022-12-13 13:13:55,325 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4309978768577495 [2022-12-13 13:13:55,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2022-12-13 13:13:55,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2022-12-13 13:13:55,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:13:55,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2022-12-13 13:13:55,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:55,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:55,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:55,327 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 122 flow. Second operand 3 states and 609 transitions. [2022-12-13 13:13:55,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 180 flow [2022-12-13 13:13:55,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 33 transitions, 179 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:13:55,328 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 119 flow [2022-12-13 13:13:55,328 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2022-12-13 13:13:55,329 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2022-12-13 13:13:55,329 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 119 flow [2022-12-13 13:13:55,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:55,329 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:55,329 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:13:55,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:55,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:55,530 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:13:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:55,531 INFO L85 PathProgramCache]: Analyzing trace with hash 842158117, now seen corresponding path program 1 times [2022-12-13 13:13:55,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:13:55,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063252239] [2022-12-13 13:13:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:55,531 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 13:13:55,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:13:55,532 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:55,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:55,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:13:55,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:55,657 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 13:13:55,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 13:13:55,835 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 13:13:55,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:13:56,035 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 13:13:56,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:13:56,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063252239] [2022-12-13 13:13:56,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063252239] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:13:56,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:13:56,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 13:13:56,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584112738] [2022-12-13 13:13:56,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:13:56,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:13:56,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:13:56,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:13:56,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:13:56,929 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 471 [2022-12-13 13:13:56,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 119 flow. Second operand has 8 states, 8 states have (on average 189.25) internal successors, (1514), 8 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:56,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:13:56,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 471 [2022-12-13 13:13:56,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:13:57,501 INFO L130 PetriNetUnfolder]: 455/679 cut-off events. [2022-12-13 13:13:57,501 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-12-13 13:13:57,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1396 conditions, 679 events. 455/679 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 3090 event pairs, 214 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 1379. Up to 336 conditions per place. [2022-12-13 13:13:57,503 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 46 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2022-12-13 13:13:57,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 263 flow [2022-12-13 13:13:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:13:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:13:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 989 transitions. [2022-12-13 13:13:57,506 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4199575371549894 [2022-12-13 13:13:57,506 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 989 transitions. [2022-12-13 13:13:57,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 989 transitions. [2022-12-13 13:13:57,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:13:57,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 989 transitions. [2022-12-13 13:13:57,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.8) internal successors, (989), 5 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:57,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:57,512 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 471.0) internal successors, (2826), 6 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:57,512 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 119 flow. Second operand 5 states and 989 transitions. [2022-12-13 13:13:57,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 263 flow [2022-12-13 13:13:57,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:13:57,514 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 120 flow [2022-12-13 13:13:57,514 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2022-12-13 13:13:57,515 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2022-12-13 13:13:57,515 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 120 flow [2022-12-13 13:13:57,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.25) internal successors, (1514), 8 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:57,515 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:57,515 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 13:13:57,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:57,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:57,717 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:13:57,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:57,718 INFO L85 PathProgramCache]: Analyzing trace with hash 335210269, now seen corresponding path program 2 times [2022-12-13 13:13:57,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:13:57,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674062821] [2022-12-13 13:13:57,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:13:57,720 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 13:13:57,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:13:57,723 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:57,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:13:57,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:13:57,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:13:57,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 13:13:57,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:57,891 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 13:13:57,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 13:13:58,004 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 13:13:58,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:13:58,568 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 13:13:58,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:13:58,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674062821] [2022-12-13 13:13:58,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674062821] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:13:58,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:13:58,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 13:13:58,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943325263] [2022-12-13 13:13:58,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:13:58,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:13:58,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:13:58,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:13:58,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:14:02,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 471 [2022-12-13 13:14:02,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 120 flow. Second operand has 12 states, 12 states have (on average 194.0) internal successors, (2328), 12 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:02,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:02,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 471 [2022-12-13 13:14:02,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:06,143 INFO L130 PetriNetUnfolder]: 2036/3029 cut-off events. [2022-12-13 13:14:06,144 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-12-13 13:14:06,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6123 conditions, 3029 events. 2036/3029 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 16482 event pairs, 963 based on Foata normal form. 6/1118 useless extension candidates. Maximal degree in co-relation 6105. Up to 331 conditions per place. [2022-12-13 13:14:06,153 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 182 selfloop transitions, 12 changer transitions 0/196 dead transitions. [2022-12-13 13:14:06,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 196 transitions, 924 flow [2022-12-13 13:14:06,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:14:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 13:14:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2516 transitions. [2022-12-13 13:14:06,158 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4451521585279547 [2022-12-13 13:14:06,158 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2516 transitions. [2022-12-13 13:14:06,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2516 transitions. [2022-12-13 13:14:06,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:06,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2516 transitions. [2022-12-13 13:14:06,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 209.66666666666666) internal successors, (2516), 12 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:06,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 states have internal predecessors, (6123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:06,165 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 states have internal predecessors, (6123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:06,166 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 120 flow. Second operand 12 states and 2516 transitions. [2022-12-13 13:14:06,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 196 transitions, 924 flow [2022-12-13 13:14:06,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 196 transitions, 919 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:14:06,169 INFO L231 Difference]: Finished difference. Result has 59 places, 38 transitions, 213 flow [2022-12-13 13:14:06,169 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=59, PETRI_TRANSITIONS=38} [2022-12-13 13:14:06,170 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2022-12-13 13:14:06,170 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 38 transitions, 213 flow [2022-12-13 13:14:06,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 194.0) internal successors, (2328), 12 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:06,171 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:06,171 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:14:06,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:06,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:06,372 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:14:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:06,373 INFO L85 PathProgramCache]: Analyzing trace with hash 337090500, now seen corresponding path program 1 times [2022-12-13 13:14:06,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:14:06,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213485571] [2022-12-13 13:14:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:06,375 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 13:14:06,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:14:06,379 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:06,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:06,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:14:06,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:06,487 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 13:14:06,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 13:14:06,502 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 13:14:06,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:14:06,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:14:06,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213485571] [2022-12-13 13:14:06,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213485571] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:06,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:14:06,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:14:06,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012826235] [2022-12-13 13:14:06,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:06,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:14:06,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:14:06,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:14:06,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:14:06,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 471 [2022-12-13 13:14:06,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 38 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:06,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:06,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 471 [2022-12-13 13:14:06,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:07,043 INFO L130 PetriNetUnfolder]: 1406/2147 cut-off events. [2022-12-13 13:14:07,043 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-12-13 13:14:07,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4396 conditions, 2147 events. 1406/2147 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11382 event pairs, 657 based on Foata normal form. 0/905 useless extension candidates. Maximal degree in co-relation 4371. Up to 2089 conditions per place. [2022-12-13 13:14:07,050 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 29 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2022-12-13 13:14:07,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 36 transitions, 277 flow [2022-12-13 13:14:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:14:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:14:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 763 transitions. [2022-12-13 13:14:07,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40498938428874737 [2022-12-13 13:14:07,052 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 763 transitions. [2022-12-13 13:14:07,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 763 transitions. [2022-12-13 13:14:07,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:07,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 763 transitions. [2022-12-13 13:14:07,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.75) internal successors, (763), 4 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:07,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:07,055 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:07,055 INFO L175 Difference]: Start difference. First operand has 59 places, 38 transitions, 213 flow. Second operand 4 states and 763 transitions. [2022-12-13 13:14:07,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 36 transitions, 277 flow [2022-12-13 13:14:07,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 36 transitions, 252 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-12-13 13:14:07,057 INFO L231 Difference]: Finished difference. Result has 56 places, 36 transitions, 194 flow [2022-12-13 13:14:07,057 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=56, PETRI_TRANSITIONS=36} [2022-12-13 13:14:07,057 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2022-12-13 13:14:07,057 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 36 transitions, 194 flow [2022-12-13 13:14:07,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:07,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:07,057 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:14:07,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:07,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:07,259 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:14:07,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:07,260 INFO L85 PathProgramCache]: Analyzing trace with hash 337090501, now seen corresponding path program 1 times [2022-12-13 13:14:07,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:14:07,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536320667] [2022-12-13 13:14:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:07,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:14:07,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:14:07,265 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:07,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:07,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:14:07,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:07,419 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 13:14:07,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:14:07,563 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 35 treesize of output 31 [2022-12-13 13:14:07,650 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 13:14:07,650 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:14:07,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536320667] [2022-12-13 13:14:07,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536320667] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:14:07,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:14:07,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 13:14:07,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635061507] [2022-12-13 13:14:07,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:14:07,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:14:07,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:14:07,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:14:07,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:14:08,635 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 471 [2022-12-13 13:14:08,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 36 transitions, 194 flow. Second operand has 8 states, 8 states have (on average 190.25) internal successors, (1522), 8 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:08,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:08,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 471 [2022-12-13 13:14:08,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:09,729 INFO L130 PetriNetUnfolder]: 1802/2840 cut-off events. [2022-12-13 13:14:09,729 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-12-13 13:14:09,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5802 conditions, 2840 events. 1802/2840 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17079 event pairs, 342 based on Foata normal form. 0/1247 useless extension candidates. Maximal degree in co-relation 5776. Up to 1819 conditions per place. [2022-12-13 13:14:09,738 INFO L137 encePairwiseOnDemand]: 466/471 looper letters, 56 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2022-12-13 13:14:09,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 68 transitions, 405 flow [2022-12-13 13:14:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:14:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 13:14:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1380 transitions. [2022-12-13 13:14:09,740 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41856232939035487 [2022-12-13 13:14:09,741 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1380 transitions. [2022-12-13 13:14:09,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1380 transitions. [2022-12-13 13:14:09,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:09,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1380 transitions. [2022-12-13 13:14:09,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 197.14285714285714) internal successors, (1380), 7 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:09,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:09,745 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:09,745 INFO L175 Difference]: Start difference. First operand has 56 places, 36 transitions, 194 flow. Second operand 7 states and 1380 transitions. [2022-12-13 13:14:09,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 68 transitions, 405 flow [2022-12-13 13:14:09,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 68 transitions, 398 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:14:09,753 INFO L231 Difference]: Finished difference. Result has 62 places, 39 transitions, 234 flow [2022-12-13 13:14:09,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=234, PETRI_PLACES=62, PETRI_TRANSITIONS=39} [2022-12-13 13:14:09,753 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2022-12-13 13:14:09,754 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 39 transitions, 234 flow [2022-12-13 13:14:09,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 190.25) internal successors, (1522), 8 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:09,754 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:09,754 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:09,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:09,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:09,956 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:14:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:09,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1859872145, now seen corresponding path program 1 times [2022-12-13 13:14:09,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:14:09,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656472733] [2022-12-13 13:14:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:09,959 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 13:14:09,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:14:09,962 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:09,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:10,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 13:14:10,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:10,101 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 13:14:10,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 13:14:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:14:10,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:14:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:14:10,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:14:10,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656472733] [2022-12-13 13:14:10,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656472733] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:14:10,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:14:10,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 13:14:10,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026297263] [2022-12-13 13:14:10,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:14:11,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:14:11,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:14:11,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:14:11,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:14:13,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 471 [2022-12-13 13:14:13,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 39 transitions, 234 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 13:14:13,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:13,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 471 [2022-12-13 13:14:13,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:18,244 INFO L130 PetriNetUnfolder]: 1283/2129 cut-off events. [2022-12-13 13:14:18,244 INFO L131 PetriNetUnfolder]: For 632/632 co-relation queries the response was YES. [2022-12-13 13:14:18,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4886 conditions, 2129 events. 1283/2129 cut-off events. For 632/632 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 12404 event pairs, 726 based on Foata normal form. 21/1370 useless extension candidates. Maximal degree in co-relation 4858. Up to 1765 conditions per place. [2022-12-13 13:14:18,250 INFO L137 encePairwiseOnDemand]: 462/471 looper letters, 51 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2022-12-13 13:14:18,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 64 transitions, 423 flow [2022-12-13 13:14:18,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:14:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 13:14:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1754 transitions. [2022-12-13 13:14:18,254 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41377683415899974 [2022-12-13 13:14:18,254 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1754 transitions. [2022-12-13 13:14:18,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1754 transitions. [2022-12-13 13:14:18,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:18,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1754 transitions. [2022-12-13 13:14:18,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.88888888888889) internal successors, (1754), 9 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:18,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 471.0) internal successors, (4710), 10 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:18,260 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 471.0) internal successors, (4710), 10 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:18,260 INFO L175 Difference]: Start difference. First operand has 62 places, 39 transitions, 234 flow. Second operand 9 states and 1754 transitions. [2022-12-13 13:14:18,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 64 transitions, 423 flow [2022-12-13 13:14:18,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 407 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 13:14:18,262 INFO L231 Difference]: Finished difference. Result has 69 places, 39 transitions, 263 flow [2022-12-13 13:14:18,262 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=263, PETRI_PLACES=69, PETRI_TRANSITIONS=39} [2022-12-13 13:14:18,262 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2022-12-13 13:14:18,263 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 39 transitions, 263 flow [2022-12-13 13:14:18,263 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 13:14:18,263 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:18,263 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:18,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 13:14:18,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:18,464 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:14:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1259346124, now seen corresponding path program 2 times [2022-12-13 13:14:18,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:14:18,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50534155] [2022-12-13 13:14:18,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:14:18,467 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 13:14:18,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:14:18,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:18,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:18,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 13:14:18,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:14:18,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 13:14:18,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:18,600 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 13:14:18,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 13:14:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 13:14:18,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:14:18,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:14:18,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50534155] [2022-12-13 13:14:18,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50534155] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:18,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:14:18,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:14:18,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713389540] [2022-12-13 13:14:18,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:18,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:14:18,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:14:18,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:14:18,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:14:19,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 471 [2022-12-13 13:14:19,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 39 transitions, 263 flow. Second operand has 4 states, 4 states have (on average 195.5) internal successors, (782), 4 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:19,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:19,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 471 [2022-12-13 13:14:19,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:19,337 INFO L130 PetriNetUnfolder]: 515/977 cut-off events. [2022-12-13 13:14:19,337 INFO L131 PetriNetUnfolder]: For 955/955 co-relation queries the response was YES. [2022-12-13 13:14:19,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2262 conditions, 977 events. 515/977 cut-off events. For 955/955 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5377 event pairs, 270 based on Foata normal form. 162/959 useless extension candidates. Maximal degree in co-relation 2232. Up to 919 conditions per place. [2022-12-13 13:14:19,340 INFO L137 encePairwiseOnDemand]: 464/471 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2022-12-13 13:14:19,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 34 transitions, 293 flow [2022-12-13 13:14:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:14:19,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:14:19,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 797 transitions. [2022-12-13 13:14:19,343 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42303609341825904 [2022-12-13 13:14:19,344 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 797 transitions. [2022-12-13 13:14:19,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 797 transitions. [2022-12-13 13:14:19,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:19,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 797 transitions. [2022-12-13 13:14:19,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:19,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:19,346 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:19,347 INFO L175 Difference]: Start difference. First operand has 69 places, 39 transitions, 263 flow. Second operand 4 states and 797 transitions. [2022-12-13 13:14:19,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 34 transitions, 293 flow [2022-12-13 13:14:19,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 34 transitions, 246 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-12-13 13:14:19,348 INFO L231 Difference]: Finished difference. Result has 55 places, 34 transitions, 194 flow [2022-12-13 13:14:19,348 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=55, PETRI_TRANSITIONS=34} [2022-12-13 13:14:19,349 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2022-12-13 13:14:19,349 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 34 transitions, 194 flow [2022-12-13 13:14:19,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.5) internal successors, (782), 4 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:19,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:19,349 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 13:14:19,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:19,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:19,550 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:14:19,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:19,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1125502723, now seen corresponding path program 3 times [2022-12-13 13:14:19,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:14:19,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562781403] [2022-12-13 13:14:19,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:14:19,553 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 13:14:19,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:14:19,556 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:19,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:19,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 13:14:19,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:14:19,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 13:14:19,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:19,772 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 13:14:19,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 13:14:20,094 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 13:14:20,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:14:22,811 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 13:14:22,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:14:22,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562781403] [2022-12-13 13:14:22,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562781403] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:14:22,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:14:22,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 13:14:22,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792687151] [2022-12-13 13:14:22,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:14:22,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 13:14:22,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:14:22,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 13:14:22,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 13:14:42,200 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 471 [2022-12-13 13:14:42,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 34 transitions, 194 flow. Second operand has 24 states, 24 states have (on average 194.0) internal successors, (4656), 24 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:42,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:42,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 471 [2022-12-13 13:14:42,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:58,645 INFO L130 PetriNetUnfolder]: 1199/2273 cut-off events. [2022-12-13 13:14:58,646 INFO L131 PetriNetUnfolder]: For 753/753 co-relation queries the response was YES. [2022-12-13 13:14:58,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5037 conditions, 2273 events. 1199/2273 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 13446 event pairs, 630 based on Foata normal form. 12/1865 useless extension candidates. Maximal degree in co-relation 5014. Up to 504 conditions per place. [2022-12-13 13:14:58,651 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 296 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2022-12-13 13:14:58,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 322 transitions, 1810 flow [2022-12-13 13:14:58,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 13:14:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 13:14:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4943 transitions. [2022-12-13 13:14:58,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43727883934890305 [2022-12-13 13:14:58,658 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4943 transitions. [2022-12-13 13:14:58,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4943 transitions. [2022-12-13 13:14:58,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:58,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4943 transitions. [2022-12-13 13:14:58,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 205.95833333333334) internal successors, (4943), 24 states have internal predecessors, (4943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:58,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 471.0) internal successors, (11775), 25 states have internal predecessors, (11775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:58,671 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 471.0) internal successors, (11775), 25 states have internal predecessors, (11775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:58,671 INFO L175 Difference]: Start difference. First operand has 55 places, 34 transitions, 194 flow. Second operand 24 states and 4943 transitions. [2022-12-13 13:14:58,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 322 transitions, 1810 flow [2022-12-13 13:14:58,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 322 transitions, 1786 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:14:58,675 INFO L231 Difference]: Finished difference. Result has 89 places, 47 transitions, 376 flow [2022-12-13 13:14:58,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=376, PETRI_PLACES=89, PETRI_TRANSITIONS=47} [2022-12-13 13:14:58,675 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2022-12-13 13:14:58,675 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 47 transitions, 376 flow [2022-12-13 13:14:58,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 194.0) internal successors, (4656), 24 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:58,676 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:58,676 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:58,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:58,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:58,877 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:14:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:58,877 INFO L85 PathProgramCache]: Analyzing trace with hash 961991519, now seen corresponding path program 1 times [2022-12-13 13:14:58,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:14:58,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482288644] [2022-12-13 13:14:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:58,878 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 13:14:58,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:14:58,879 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:58,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:58,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:14:58,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:58,987 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 13:14:58,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:14:58,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:14:58,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482288644] [2022-12-13 13:14:58,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482288644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:58,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:14:58,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:14:58,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836758826] [2022-12-13 13:14:58,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:58,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:14:58,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:14:58,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:14:58,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:14:59,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 471 [2022-12-13 13:14:59,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 47 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:59,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:59,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 471 [2022-12-13 13:14:59,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:59,552 INFO L130 PetriNetUnfolder]: 1493/2756 cut-off events. [2022-12-13 13:14:59,552 INFO L131 PetriNetUnfolder]: For 609/609 co-relation queries the response was YES. [2022-12-13 13:14:59,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6203 conditions, 2756 events. 1493/2756 cut-off events. For 609/609 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 16777 event pairs, 273 based on Foata normal form. 21/2273 useless extension candidates. Maximal degree in co-relation 6167. Up to 2101 conditions per place. [2022-12-13 13:14:59,564 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 51 selfloop transitions, 4 changer transitions 1/58 dead transitions. [2022-12-13 13:14:59,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 58 transitions, 517 flow [2022-12-13 13:14:59,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:14:59,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:14:59,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2022-12-13 13:14:59,566 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4394904458598726 [2022-12-13 13:14:59,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2022-12-13 13:14:59,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2022-12-13 13:14:59,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:59,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2022-12-13 13:14:59,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:59,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:59,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:59,569 INFO L175 Difference]: Start difference. First operand has 89 places, 47 transitions, 376 flow. Second operand 3 states and 621 transitions. [2022-12-13 13:14:59,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 58 transitions, 517 flow [2022-12-13 13:14:59,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 58 transitions, 469 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-12-13 13:14:59,573 INFO L231 Difference]: Finished difference. Result has 82 places, 50 transitions, 358 flow [2022-12-13 13:14:59,573 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=82, PETRI_TRANSITIONS=50} [2022-12-13 13:14:59,573 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2022-12-13 13:14:59,573 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 50 transitions, 358 flow [2022-12-13 13:14:59,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:59,573 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:59,573 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:59,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:59,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:59,774 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:14:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:59,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1184183953, now seen corresponding path program 1 times [2022-12-13 13:14:59,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:14:59,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520440620] [2022-12-13 13:14:59,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:59,777 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 13:14:59,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:14:59,780 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:59,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:14:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:59,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:14:59,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:14:59,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:14:59,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:14:59,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520440620] [2022-12-13 13:14:59,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520440620] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:59,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:14:59,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:14:59,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218407289] [2022-12-13 13:14:59,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:59,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:14:59,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:14:59,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:14:59,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:14:59,926 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 471 [2022-12-13 13:14:59,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 50 transitions, 358 flow. Second operand has 4 states, 4 states have (on average 196.75) internal successors, (787), 4 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:59,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:59,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 471 [2022-12-13 13:14:59,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:15:00,526 INFO L130 PetriNetUnfolder]: 1703/3267 cut-off events. [2022-12-13 13:15:00,526 INFO L131 PetriNetUnfolder]: For 1491/1491 co-relation queries the response was YES. [2022-12-13 13:15:00,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8232 conditions, 3267 events. 1703/3267 cut-off events. For 1491/1491 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 20866 event pairs, 660 based on Foata normal form. 80/3347 useless extension candidates. Maximal degree in co-relation 8194. Up to 2148 conditions per place. [2022-12-13 13:15:00,535 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 60 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2022-12-13 13:15:00,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 65 transitions, 535 flow [2022-12-13 13:15:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:15:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:15:00,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 803 transitions. [2022-12-13 13:15:00,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4262208067940552 [2022-12-13 13:15:00,538 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 803 transitions. [2022-12-13 13:15:00,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 803 transitions. [2022-12-13 13:15:00,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:15:00,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 803 transitions. [2022-12-13 13:15:00,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:00,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:00,541 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:00,541 INFO L175 Difference]: Start difference. First operand has 82 places, 50 transitions, 358 flow. Second operand 4 states and 803 transitions. [2022-12-13 13:15:00,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 65 transitions, 535 flow [2022-12-13 13:15:00,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 65 transitions, 529 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:15:00,545 INFO L231 Difference]: Finished difference. Result has 86 places, 52 transitions, 383 flow [2022-12-13 13:15:00,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=383, PETRI_PLACES=86, PETRI_TRANSITIONS=52} [2022-12-13 13:15:00,546 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2022-12-13 13:15:00,546 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 52 transitions, 383 flow [2022-12-13 13:15:00,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 196.75) internal successors, (787), 4 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:00,546 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:15:00,546 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:15:00,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:00,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:00,748 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:15:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:15:00,749 INFO L85 PathProgramCache]: Analyzing trace with hash -173392553, now seen corresponding path program 2 times [2022-12-13 13:15:00,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:15:00,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679550155] [2022-12-13 13:15:00,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:15:00,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:15:00,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:15:00,754 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:00,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:00,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:15:00,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:15:00,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:15:00,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:15:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:15:00,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:15:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:15:00,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:15:00,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679550155] [2022-12-13 13:15:00,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679550155] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:15:00,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:15:00,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-12-13 13:15:00,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658584504] [2022-12-13 13:15:00,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:15:00,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:15:00,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:15:00,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:15:00,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:15:01,060 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2022-12-13 13:15:01,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 52 transitions, 383 flow. Second operand has 6 states, 6 states have (on average 199.16666666666666) internal successors, (1195), 6 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:01,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:15:01,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2022-12-13 13:15:01,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:15:02,352 INFO L130 PetriNetUnfolder]: 2623/5047 cut-off events. [2022-12-13 13:15:02,353 INFO L131 PetriNetUnfolder]: For 4691/5251 co-relation queries the response was YES. [2022-12-13 13:15:02,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15994 conditions, 5047 events. 2623/5047 cut-off events. For 4691/5251 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 35300 event pairs, 540 based on Foata normal form. 1240/6287 useless extension candidates. Maximal degree in co-relation 15954. Up to 1841 conditions per place. [2022-12-13 13:15:02,377 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 80 selfloop transitions, 12 changer transitions 4/97 dead transitions. [2022-12-13 13:15:02,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 97 transitions, 763 flow [2022-12-13 13:15:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:15:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 13:15:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1430 transitions. [2022-12-13 13:15:02,381 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43372763117986046 [2022-12-13 13:15:02,381 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1430 transitions. [2022-12-13 13:15:02,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1430 transitions. [2022-12-13 13:15:02,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:15:02,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1430 transitions. [2022-12-13 13:15:02,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 204.28571428571428) internal successors, (1430), 7 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:02,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:02,388 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 471.0) internal successors, (3768), 8 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:02,388 INFO L175 Difference]: Start difference. First operand has 86 places, 52 transitions, 383 flow. Second operand 7 states and 1430 transitions. [2022-12-13 13:15:02,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 97 transitions, 763 flow [2022-12-13 13:15:02,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 97 transitions, 744 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 13:15:02,397 INFO L231 Difference]: Finished difference. Result has 96 places, 59 transitions, 476 flow [2022-12-13 13:15:02,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=476, PETRI_PLACES=96, PETRI_TRANSITIONS=59} [2022-12-13 13:15:02,397 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2022-12-13 13:15:02,398 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 59 transitions, 476 flow [2022-12-13 13:15:02,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 199.16666666666666) internal successors, (1195), 6 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:02,398 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:15:02,398 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:15:02,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:02,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:02,599 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:15:02,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:15:02,599 INFO L85 PathProgramCache]: Analyzing trace with hash -4610533, now seen corresponding path program 1 times [2022-12-13 13:15:02,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:15:02,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230587350] [2022-12-13 13:15:02,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:15:02,600 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 13:15:02,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:15:02,600 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:02,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:02,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:15:02,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:15:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:15:02,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:15:02,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:15:02,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230587350] [2022-12-13 13:15:02,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230587350] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:15:02,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:15:02,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:15:02,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806923030] [2022-12-13 13:15:02,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:15:02,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:15:02,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:15:02,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:15:02,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:15:02,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2022-12-13 13:15:02,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 59 transitions, 476 flow. Second operand has 4 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:02,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:15:02,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2022-12-13 13:15:02,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:15:03,564 INFO L130 PetriNetUnfolder]: 2343/4567 cut-off events. [2022-12-13 13:15:03,564 INFO L131 PetriNetUnfolder]: For 12171/12771 co-relation queries the response was YES. [2022-12-13 13:15:03,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17659 conditions, 4567 events. 2343/4567 cut-off events. For 12171/12771 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 31480 event pairs, 1140 based on Foata normal form. 720/5247 useless extension candidates. Maximal degree in co-relation 17614. Up to 3228 conditions per place. [2022-12-13 13:15:03,582 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 62 selfloop transitions, 8 changer transitions 4/75 dead transitions. [2022-12-13 13:15:03,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 75 transitions, 688 flow [2022-12-13 13:15:03,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:15:03,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:15:03,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 817 transitions. [2022-12-13 13:15:03,584 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43365180467091297 [2022-12-13 13:15:03,584 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 817 transitions. [2022-12-13 13:15:03,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 817 transitions. [2022-12-13 13:15:03,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:15:03,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 817 transitions. [2022-12-13 13:15:03,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:03,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:03,586 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:03,586 INFO L175 Difference]: Start difference. First operand has 96 places, 59 transitions, 476 flow. Second operand 4 states and 817 transitions. [2022-12-13 13:15:03,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 75 transitions, 688 flow [2022-12-13 13:15:03,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 75 transitions, 672 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-12-13 13:15:03,607 INFO L231 Difference]: Finished difference. Result has 101 places, 60 transitions, 501 flow [2022-12-13 13:15:03,607 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=501, PETRI_PLACES=101, PETRI_TRANSITIONS=60} [2022-12-13 13:15:03,608 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2022-12-13 13:15:03,608 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 60 transitions, 501 flow [2022-12-13 13:15:03,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:03,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:15:03,608 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:15:03,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:03,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:03,808 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:15:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:15:03,809 INFO L85 PathProgramCache]: Analyzing trace with hash -556203205, now seen corresponding path program 2 times [2022-12-13 13:15:03,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:15:03,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464112491] [2022-12-13 13:15:03,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:15:03,810 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:15:03,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:15:03,811 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:03,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:03,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:15:03,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:15:03,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:15:03,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:15:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:15:03,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:15:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:15:04,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:15:04,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464112491] [2022-12-13 13:15:04,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464112491] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 13:15:04,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:15:04,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-13 13:15:04,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742198045] [2022-12-13 13:15:04,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:15:04,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:15:04,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:15:04,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:15:04,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:15:04,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 471 [2022-12-13 13:15:04,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 60 transitions, 501 flow. Second operand has 4 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:04,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:15:04,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 471 [2022-12-13 13:15:04,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:15:04,959 INFO L130 PetriNetUnfolder]: 2343/4467 cut-off events. [2022-12-13 13:15:04,959 INFO L131 PetriNetUnfolder]: For 14491/15151 co-relation queries the response was YES. [2022-12-13 13:15:04,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17762 conditions, 4467 events. 2343/4467 cut-off events. For 14491/15151 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 29164 event pairs, 780 based on Foata normal form. 700/5167 useless extension candidates. Maximal degree in co-relation 17714. Up to 3280 conditions per place. [2022-12-13 13:15:04,976 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 58 selfloop transitions, 9 changer transitions 5/73 dead transitions. [2022-12-13 13:15:04,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 73 transitions, 710 flow [2022-12-13 13:15:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:15:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:15:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 817 transitions. [2022-12-13 13:15:04,978 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43365180467091297 [2022-12-13 13:15:04,978 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 817 transitions. [2022-12-13 13:15:04,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 817 transitions. [2022-12-13 13:15:04,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:15:04,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 817 transitions. [2022-12-13 13:15:04,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:04,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:04,980 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:04,980 INFO L175 Difference]: Start difference. First operand has 101 places, 60 transitions, 501 flow. Second operand 4 states and 817 transitions. [2022-12-13 13:15:04,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 73 transitions, 710 flow [2022-12-13 13:15:05,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 73 transitions, 682 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 13:15:05,047 INFO L231 Difference]: Finished difference. Result has 105 places, 62 transitions, 533 flow [2022-12-13 13:15:05,047 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=533, PETRI_PLACES=105, PETRI_TRANSITIONS=62} [2022-12-13 13:15:05,047 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2022-12-13 13:15:05,048 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 62 transitions, 533 flow [2022-12-13 13:15:05,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:05,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:15:05,048 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:15:05,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:05,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:05,249 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:15:05,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:15:05,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1765027823, now seen corresponding path program 3 times [2022-12-13 13:15:05,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:15:05,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045402419] [2022-12-13 13:15:05,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:15:05,251 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 13:15:05,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:15:05,253 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:05,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:05,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 13:15:05,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:15:05,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:15:05,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:15:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:15:05,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:15:05,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:15:05,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045402419] [2022-12-13 13:15:05,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045402419] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:15:05,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:15:05,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:15:05,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210543039] [2022-12-13 13:15:05,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:15:05,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:15:05,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:15:05,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:15:05,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:15:05,519 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 471 [2022-12-13 13:15:05,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 62 transitions, 533 flow. Second operand has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:05,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:15:05,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 471 [2022-12-13 13:15:05,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:15:06,522 INFO L130 PetriNetUnfolder]: 2723/4947 cut-off events. [2022-12-13 13:15:06,522 INFO L131 PetriNetUnfolder]: For 14691/15131 co-relation queries the response was YES. [2022-12-13 13:15:06,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19084 conditions, 4947 events. 2723/4947 cut-off events. For 14691/15131 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 29663 event pairs, 520 based on Foata normal form. 380/5287 useless extension candidates. Maximal degree in co-relation 19034. Up to 4060 conditions per place. [2022-12-13 13:15:06,540 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 67 selfloop transitions, 6 changer transitions 1/76 dead transitions. [2022-12-13 13:15:06,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 76 transitions, 744 flow [2022-12-13 13:15:06,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:15:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:15:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 803 transitions. [2022-12-13 13:15:06,542 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4262208067940552 [2022-12-13 13:15:06,542 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 803 transitions. [2022-12-13 13:15:06,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 803 transitions. [2022-12-13 13:15:06,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:15:06,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 803 transitions. [2022-12-13 13:15:06,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:06,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:06,545 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:06,545 INFO L175 Difference]: Start difference. First operand has 105 places, 62 transitions, 533 flow. Second operand 4 states and 803 transitions. [2022-12-13 13:15:06,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 76 transitions, 744 flow [2022-12-13 13:15:06,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 76 transitions, 720 flow, removed 2 selfloop flow, removed 4 redundant places. [2022-12-13 13:15:06,581 INFO L231 Difference]: Finished difference. Result has 105 places, 64 transitions, 543 flow [2022-12-13 13:15:06,581 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=543, PETRI_PLACES=105, PETRI_TRANSITIONS=64} [2022-12-13 13:15:06,581 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2022-12-13 13:15:06,581 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 64 transitions, 543 flow [2022-12-13 13:15:06,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:06,581 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:15:06,581 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:15:06,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:06,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:06,783 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:15:06,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:15:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1335841059, now seen corresponding path program 4 times [2022-12-13 13:15:06,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:15:06,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275488331] [2022-12-13 13:15:06,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:15:06,785 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 13:15:06,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:15:06,788 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:06,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:06,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:15:06,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:15:06,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:15:06,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:15:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:15:06,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:15:06,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:15:06,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275488331] [2022-12-13 13:15:06,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275488331] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:15:06,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:15:06,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:15:06,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672292136] [2022-12-13 13:15:06,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:15:06,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:15:06,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:15:06,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:15:06,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:15:07,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 471 [2022-12-13 13:15:07,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 64 transitions, 543 flow. Second operand has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:07,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:15:07,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 471 [2022-12-13 13:15:07,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:15:07,979 INFO L130 PetriNetUnfolder]: 2823/4947 cut-off events. [2022-12-13 13:15:07,979 INFO L131 PetriNetUnfolder]: For 16889/17309 co-relation queries the response was YES. [2022-12-13 13:15:07,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20624 conditions, 4947 events. 2823/4947 cut-off events. For 16889/17309 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 28747 event pairs, 1020 based on Foata normal form. 400/5287 useless extension candidates. Maximal degree in co-relation 20574. Up to 3548 conditions per place. [2022-12-13 13:15:08,000 INFO L137 encePairwiseOnDemand]: 467/471 looper letters, 67 selfloop transitions, 13 changer transitions 1/83 dead transitions. [2022-12-13 13:15:08,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 83 transitions, 829 flow [2022-12-13 13:15:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:15:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:15:08,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 803 transitions. [2022-12-13 13:15:08,002 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4262208067940552 [2022-12-13 13:15:08,002 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 803 transitions. [2022-12-13 13:15:08,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 803 transitions. [2022-12-13 13:15:08,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:15:08,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 803 transitions. [2022-12-13 13:15:08,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:08,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:08,004 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 471.0) internal successors, (2355), 5 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:08,004 INFO L175 Difference]: Start difference. First operand has 105 places, 64 transitions, 543 flow. Second operand 4 states and 803 transitions. [2022-12-13 13:15:08,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 83 transitions, 829 flow [2022-12-13 13:15:08,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 83 transitions, 801 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-12-13 13:15:08,041 INFO L231 Difference]: Finished difference. Result has 108 places, 70 transitions, 627 flow [2022-12-13 13:15:08,042 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=627, PETRI_PLACES=108, PETRI_TRANSITIONS=70} [2022-12-13 13:15:08,042 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2022-12-13 13:15:08,042 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 70 transitions, 627 flow [2022-12-13 13:15:08,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:08,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:15:08,042 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:15:08,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:08,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:08,243 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 13:15:08,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:15:08,244 INFO L85 PathProgramCache]: Analyzing trace with hash -695018729, now seen corresponding path program 1 times [2022-12-13 13:15:08,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:15:08,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696936069] [2022-12-13 13:15:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:15:08,246 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 13:15:08,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:15:08,249 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:08,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a404b4-2d9a-4741-99e9-2f6c7eb6808d/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:15:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:08,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 13:15:08,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:15:09,063 INFO L321 Elim1Store]: treesize reduction 568, result has 4.2 percent of original size [2022-12-13 13:15:09,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 66 case distinctions, treesize of input 838 treesize of output 152 [2022-12-13 13:15:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:15:09,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:15:45,124 WARN L233 SmtUtils]: Spent 35.29s on a formula simplification. DAG size of input: 1527 DAG size of output: 354 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-13 13:15:45,126 INFO L321 Elim1Store]: treesize reduction 2999, result has 20.6 percent of original size [2022-12-13 13:15:45,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 28 select indices, 28 select index equivalence classes, 0 disjoint index pairs (out of 378 index pairs), introduced 48 new quantified variables, introduced 378 case distinctions, treesize of input 4440 treesize of output 1108