./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R --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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --- 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-38b53e6 [2022-11-25 17:21:51,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:21:51,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:21:51,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:21:51,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:21:51,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:21:51,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:21:51,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:21:51,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:21:51,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:21:51,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:21:51,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:21:51,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:21:51,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:21:51,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:21:51,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:21:51,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:21:51,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:21:51,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:21:51,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:21:51,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:21:51,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:21:51,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:21:51,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:21:51,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:21:51,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:21:51,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:21:51,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:21:51,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:21:51,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:21:51,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:21:51,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:21:51,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:21:51,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:21:51,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:21:51,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:21:51,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:21:51,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:21:51,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:21:51,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:21:51,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:21:51,900 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:21:51,926 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:21:51,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:21:51,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:21:51,927 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:21:51,928 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:21:51,928 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:21:51,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:21:51,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:21:51,930 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:21:51,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:21:51,930 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:21:51,931 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:21:51,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:21:51,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:21:51,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:21:51,931 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:21:51,932 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:21:51,932 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:21:51,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:21:51,932 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:21:51,933 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:21:51,933 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:21:51,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:21:51,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:21:51,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:21:51,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:21:51,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:21:51,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:21:51,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:21:51,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:21:51,935 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:21:51,936 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:21:51,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:21:51,936 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_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 [2022-11-25 17:21:52,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:21:52,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:21:52,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:21:52,381 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:21:52,382 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:21:52,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-25 17:21:55,580 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:21:55,878 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:21:55,879 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-25 17:21:55,892 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/data/4343e6744/0453846c660c436dae979624fe7fdd7e/FLAG6c6ccbaf8 [2022-11-25 17:21:55,921 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/data/4343e6744/0453846c660c436dae979624fe7fdd7e [2022-11-25 17:21:55,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:21:55,931 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:21:55,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:21:55,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:21:55,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:21:55,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:21:55" (1/1) ... [2022-11-25 17:21:55,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71047020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:21:55, skipping insertion in model container [2022-11-25 17:21:55,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:21:55" (1/1) ... [2022-11-25 17:21:55,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:21:55,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:21:56,235 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:21:56,241 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:21:56,242 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:21:56,244 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:21:56,248 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:21:56,249 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:21:56,260 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:21:56,264 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:21:56,264 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:21:56,269 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:21:56,274 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:21:56,276 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:21:56,276 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:21:56,278 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:21:56,295 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_4b5d938d-08f3-4aa6-9312-e173c12854a9/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-25 17:21:56,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:21:56,338 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) [2022-11-25 17:21:56,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1645394d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:21:56, skipping insertion in model container [2022-11-25 17:21:56,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:21:56,341 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 17:21:56,343 INFO L158 Benchmark]: Toolchain (without parser) took 411.05ms. Allocated memory is still 174.1MB. Free memory was 143.2MB in the beginning and 131.7MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 17:21:56,344 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 117.4MB. Free memory is still 93.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:21:56,345 INFO L158 Benchmark]: CACSL2BoogieTranslator took 406.40ms. Allocated memory is still 174.1MB. Free memory was 142.9MB in the beginning and 131.7MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 17:21:56,347 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 117.4MB. Free memory is still 93.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 406.40ms. Allocated memory is still 174.1MB. Free memory was 142.9MB in the beginning and 131.7MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 159]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R --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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --- 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-38b53e6 [2022-11-25 17:21:59,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:21:59,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:21:59,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:21:59,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:21:59,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:21:59,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:21:59,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:21:59,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:21:59,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:21:59,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:21:59,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:21:59,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:21:59,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:21:59,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:21:59,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:21:59,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:21:59,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:21:59,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:21:59,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:21:59,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:21:59,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:21:59,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:21:59,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:21:59,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:21:59,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:21:59,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:21:59,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:21:59,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:21:59,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:21:59,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:21:59,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:21:59,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:21:59,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:21:59,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:21:59,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:21:59,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:21:59,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:21:59,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:21:59,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:21:59,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:21:59,181 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:21:59,208 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:21:59,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:21:59,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:21:59,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:21:59,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:21:59,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:21:59,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:21:59,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:21:59,212 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:21:59,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:21:59,213 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:21:59,213 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:21:59,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:21:59,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:21:59,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:21:59,214 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:21:59,215 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:21:59,215 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:21:59,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:21:59,216 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:21:59,216 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:21:59,216 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:21:59,217 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:21:59,217 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:21:59,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:21:59,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:21:59,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:21:59,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:21:59,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:21:59,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:21:59,220 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:21:59,220 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:21:59,220 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:21:59,221 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:21:59,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:21:59,221 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:21:59,222 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_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 [2022-11-25 17:21:59,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:21:59,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:21:59,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:21:59,720 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:21:59,721 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:21:59,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-25 17:22:02,952 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:22:03,207 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:22:03,208 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-25 17:22:03,216 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/data/731b38433/7fdc4dafbce745078dd8e93e59e60c16/FLAGe9e938bf4 [2022-11-25 17:22:03,236 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/data/731b38433/7fdc4dafbce745078dd8e93e59e60c16 [2022-11-25 17:22:03,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:22:03,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:22:03,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:22:03,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:22:03,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:22:03,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:22:03" (1/1) ... [2022-11-25 17:22:03,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3575bc5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:03, skipping insertion in model container [2022-11-25 17:22:03,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:22:03" (1/1) ... [2022-11-25 17:22:03,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:22:03,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:22:03,472 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,496 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,500 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,505 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,527 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,529 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,530 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,532 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,541 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,543 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,543 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,545 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,557 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_4b5d938d-08f3-4aa6-9312-e173c12854a9/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-25 17:22:03,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:22:03,623 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 17:22:03,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:22:03,645 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,649 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,652 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,654 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,657 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,659 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,665 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,672 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,673 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,674 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,676 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,677 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,682 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,684 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,689 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_4b5d938d-08f3-4aa6-9312-e173c12854a9/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-25 17:22:03,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:22:03,709 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:22:03,736 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,741 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,742 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,744 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,746 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,748 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,759 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,761 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,763 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,765 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,768 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,772 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,778 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:03,780 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:03,785 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_4b5d938d-08f3-4aa6-9312-e173c12854a9/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-25 17:22:03,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:22:03,826 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:22:03,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:03 WrapperNode [2022-11-25 17:22:03,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:22:03,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:22:03,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:22:03,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:22:03,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:03" (1/1) ... [2022-11-25 17:22:03,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:03" (1/1) ... [2022-11-25 17:22:03,930 INFO L138 Inliner]: procedures = 27, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 305 [2022-11-25 17:22:03,942 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:22:03,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:22:03,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:22:03,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:22:03,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:03" (1/1) ... [2022-11-25 17:22:03,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:03" (1/1) ... [2022-11-25 17:22:03,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:03" (1/1) ... [2022-11-25 17:22:03,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:03" (1/1) ... [2022-11-25 17:22:03,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:03" (1/1) ... [2022-11-25 17:22:04,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:03" (1/1) ... [2022-11-25 17:22:04,008 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:03" (1/1) ... [2022-11-25 17:22:04,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:03" (1/1) ... [2022-11-25 17:22:04,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:22:04,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:22:04,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:22:04,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:22:04,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:03" (1/1) ... [2022-11-25 17:22:04,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:22:04,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:04,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:22:04,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:22:04,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:22:04,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:22:04,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:22:04,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:22:04,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:22:04,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:22:04,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:22:04,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:22:04,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:22:04,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:22:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:22:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:22:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:22:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:22:04,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:22:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:22:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:22:04,152 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:22:04,346 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:22:04,348 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:22:05,351 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:22:05,709 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:22:05,710 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 17:22:05,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:22:05 BoogieIcfgContainer [2022-11-25 17:22:05,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:22:05,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:22:05,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:22:05,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:22:05,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:22:03" (1/3) ... [2022-11-25 17:22:05,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecf0475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:22:05, skipping insertion in model container [2022-11-25 17:22:05,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:03" (2/3) ... [2022-11-25 17:22:05,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecf0475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:22:05, skipping insertion in model container [2022-11-25 17:22:05,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:22:05" (3/3) ... [2022-11-25 17:22:05,730 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2022-11-25 17:22:05,753 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:22:05,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-11-25 17:22:05,754 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:22:05,925 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:22:05,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 293 transitions, 610 flow [2022-11-25 17:22:06,208 INFO L130 PetriNetUnfolder]: 22/290 cut-off events. [2022-11-25 17:22:06,208 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:22:06,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 290 events. 22/290 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 300 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 237. Up to 3 conditions per place. [2022-11-25 17:22:06,217 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 293 transitions, 610 flow [2022-11-25 17:22:06,234 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 285 transitions, 588 flow [2022-11-25 17:22:06,239 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:22:06,274 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 285 transitions, 588 flow [2022-11-25 17:22:06,280 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 285 transitions, 588 flow [2022-11-25 17:22:06,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 285 transitions, 588 flow [2022-11-25 17:22:06,379 INFO L130 PetriNetUnfolder]: 22/285 cut-off events. [2022-11-25 17:22:06,380 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:22:06,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 285 events. 22/285 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 295 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 237. Up to 3 conditions per place. [2022-11-25 17:22:06,387 INFO L119 LiptonReduction]: Number of co-enabled transitions 3794 [2022-11-25 17:23:03,348 INFO L134 LiptonReduction]: Checked pairs total: 6486 [2022-11-25 17:23:03,348 INFO L136 LiptonReduction]: Total number of compositions: 310 [2022-11-25 17:23:03,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:23:03,374 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;@482a44e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:23:03,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2022-11-25 17:23:03,378 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:23:03,378 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:23:03,379 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:03,380 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:23:03,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-25 17:23:03,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:03,387 INFO L85 PathProgramCache]: Analyzing trace with hash 43280, now seen corresponding path program 1 times [2022-11-25 17:23:03,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:23:03,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953886093] [2022-11-25 17:23:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:03,403 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 [2022-11-25 17:23:03,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:23:03,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:23:03,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:23:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:03,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:23:03,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:03,928 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:23:03,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:23:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:04,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:23:04,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:23:04,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953886093] [2022-11-25 17:23:04,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953886093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:04,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:04,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:23:04,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332594179] [2022-11-25 17:23:04,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:04,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:23:04,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:23:04,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:23:04,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:23:04,526 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 603 [2022-11-25 17:23:04,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:04,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:04,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 603 [2022-11-25 17:23:04,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:09,909 INFO L130 PetriNetUnfolder]: 14639/20368 cut-off events. [2022-11-25 17:23:09,910 INFO L131 PetriNetUnfolder]: For 482/482 co-relation queries the response was YES. [2022-11-25 17:23:09,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41233 conditions, 20368 events. 14639/20368 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 1549. Compared 116012 event pairs, 12706 based on Foata normal form. 0/6817 useless extension candidates. Maximal degree in co-relation 19060. Up to 10187 conditions per place. [2022-11-25 17:23:10,083 INFO L137 encePairwiseOnDemand]: 592/603 looper letters, 114 selfloop transitions, 6 changer transitions 0/120 dead transitions. [2022-11-25 17:23:10,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 120 transitions, 516 flow [2022-11-25 17:23:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:23:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:23:10,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 829 transitions. [2022-11-25 17:23:10,180 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4582642343836374 [2022-11-25 17:23:10,181 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 829 transitions. [2022-11-25 17:23:10,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 829 transitions. [2022-11-25 17:23:10,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:10,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 829 transitions. [2022-11-25 17:23:10,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:10,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:10,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:10,250 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 146 flow. Second operand 3 states and 829 transitions. [2022-11-25 17:23:10,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 120 transitions, 516 flow [2022-11-25 17:23:10,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 120 transitions, 492 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:23:10,287 INFO L231 Difference]: Finished difference. Result has 64 places, 67 transitions, 180 flow [2022-11-25 17:23:10,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=64, PETRI_TRANSITIONS=67} [2022-11-25 17:23:10,307 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -3 predicate places. [2022-11-25 17:23:10,307 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 67 transitions, 180 flow [2022-11-25 17:23:10,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:10,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:10,309 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:23:10,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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)] Ended with exit code 0 [2022-11-25 17:23:10,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:23:10,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-25 17:23:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash 43279, now seen corresponding path program 1 times [2022-11-25 17:23:10,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:23:10,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124652007] [2022-11-25 17:23:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:10,525 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 [2022-11-25 17:23:10,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:23:10,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:23:10,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:23:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:10,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:23:10,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:10,812 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:23:10,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 17:23:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:10,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:23:10,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:23:10,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124652007] [2022-11-25 17:23:10,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124652007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:10,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:10,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:23:10,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631746029] [2022-11-25 17:23:10,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:10,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:23:10,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:23:10,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:23:10,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:23:11,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 603 [2022-11-25 17:23:11,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 67 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:11,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:11,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 603 [2022-11-25 17:23:11,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:14,367 INFO L130 PetriNetUnfolder]: 14639/20362 cut-off events. [2022-11-25 17:23:14,367 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2022-11-25 17:23:14,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40930 conditions, 20362 events. 14639/20362 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 1538. Compared 115814 event pairs, 12706 based on Foata normal form. 4/6827 useless extension candidates. Maximal degree in co-relation 20445. Up to 20362 conditions per place. [2022-11-25 17:23:14,564 INFO L137 encePairwiseOnDemand]: 599/603 looper letters, 63 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2022-11-25 17:23:14,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 302 flow [2022-11-25 17:23:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:23:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:23:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2022-11-25 17:23:14,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4223327805417358 [2022-11-25 17:23:14,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2022-11-25 17:23:14,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2022-11-25 17:23:14,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:14,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2022-11-25 17:23:14,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:14,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:14,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:14,582 INFO L175 Difference]: Start difference. First operand has 64 places, 67 transitions, 180 flow. Second operand 3 states and 764 transitions. [2022-11-25 17:23:14,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 302 flow [2022-11-25 17:23:14,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:23:14,585 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 164 flow [2022-11-25 17:23:14,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2022-11-25 17:23:14,587 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -6 predicate places. [2022-11-25 17:23:14,587 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 164 flow [2022-11-25 17:23:14,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:14,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:14,589 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:23:14,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:14,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:23:14,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-25 17:23:14,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:14,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1346861, now seen corresponding path program 1 times [2022-11-25 17:23:14,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:23:14,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098337146] [2022-11-25 17:23:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:14,805 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 [2022-11-25 17:23:14,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:23:14,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:23:14,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:23:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:14,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:23:14,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:15,087 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:23:15,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:23:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:15,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:15,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:23:15,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098337146] [2022-11-25 17:23:15,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098337146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:15,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:23:15,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 17:23:15,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706551367] [2022-11-25 17:23:15,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:15,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:23:15,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:23:15,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:23:15,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:23:17,039 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 603 [2022-11-25 17:23:17,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 220.0) internal successors, (1320), 6 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:17,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:17,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 603 [2022-11-25 17:23:17,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:24,102 INFO L130 PetriNetUnfolder]: 21968/30557 cut-off events. [2022-11-25 17:23:24,102 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2022-11-25 17:23:24,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61421 conditions, 30557 events. 21968/30557 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 1829. Compared 180068 event pairs, 19059 based on Foata normal form. 0/10236 useless extension candidates. Maximal degree in co-relation 61413. Up to 10185 conditions per place. [2022-11-25 17:23:24,258 INFO L137 encePairwiseOnDemand]: 591/603 looper letters, 158 selfloop transitions, 27 changer transitions 0/185 dead transitions. [2022-11-25 17:23:24,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 185 transitions, 818 flow [2022-11-25 17:23:24,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:23:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:23:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1508 transitions. [2022-11-25 17:23:24,264 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4168048645660586 [2022-11-25 17:23:24,264 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1508 transitions. [2022-11-25 17:23:24,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1508 transitions. [2022-11-25 17:23:24,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:24,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1508 transitions. [2022-11-25 17:23:24,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 251.33333333333334) internal successors, (1508), 6 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:24,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 603.0) internal successors, (4221), 7 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:24,280 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 603.0) internal successors, (4221), 7 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:24,280 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 164 flow. Second operand 6 states and 1508 transitions. [2022-11-25 17:23:24,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 185 transitions, 818 flow [2022-11-25 17:23:24,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 185 transitions, 817 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:23:24,286 INFO L231 Difference]: Finished difference. Result has 69 places, 85 transitions, 367 flow [2022-11-25 17:23:24,287 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=367, PETRI_PLACES=69, PETRI_TRANSITIONS=85} [2022-11-25 17:23:24,288 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 2 predicate places. [2022-11-25 17:23:24,289 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 85 transitions, 367 flow [2022-11-25 17:23:24,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 220.0) internal successors, (1320), 6 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:24,290 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:24,290 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:23:24,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:24,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:23:24,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-25 17:23:24,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:24,505 INFO L85 PathProgramCache]: Analyzing trace with hash 41831449, now seen corresponding path program 1 times [2022-11-25 17:23:24,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:23:24,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347074109] [2022-11-25 17:23:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:24,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:23:24,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:23:24,507 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:23:24,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:23:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:24,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:23:24,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:24,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:24,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:24,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:24,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:24,854 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 17:23:24,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-25 17:23:24,900 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 17:23:24,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-25 17:23:24,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:24,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:23:25,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:25,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:23:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:25,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:23:25,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:23:25,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347074109] [2022-11-25 17:23:25,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347074109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:25,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:25,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:23:25,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072907085] [2022-11-25 17:23:25,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:25,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:23:25,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:23:25,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:23:25,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:23:25,424 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 603 [2022-11-25 17:23:25,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 85 transitions, 367 flow. Second operand has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:25,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:25,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 603 [2022-11-25 17:23:25,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:29,536 INFO L130 PetriNetUnfolder]: 16926/23832 cut-off events. [2022-11-25 17:23:29,536 INFO L131 PetriNetUnfolder]: For 155/155 co-relation queries the response was YES. [2022-11-25 17:23:29,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48045 conditions, 23832 events. 16926/23832 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 1560. Compared 140655 event pairs, 14637 based on Foata normal form. 0/8633 useless extension candidates. Maximal degree in co-relation 48032. Up to 23832 conditions per place. [2022-11-25 17:23:29,668 INFO L137 encePairwiseOnDemand]: 600/603 looper letters, 80 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2022-11-25 17:23:29,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 509 flow [2022-11-25 17:23:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:23:29,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:23:29,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2022-11-25 17:23:29,673 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43228302929795465 [2022-11-25 17:23:29,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2022-11-25 17:23:29,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2022-11-25 17:23:29,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:29,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2022-11-25 17:23:29,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 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) [2022-11-25 17:23:29,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:29,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:29,684 INFO L175 Difference]: Start difference. First operand has 69 places, 85 transitions, 367 flow. Second operand 3 states and 782 transitions. [2022-11-25 17:23:29,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 509 flow [2022-11-25 17:23:29,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 81 transitions, 479 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-11-25 17:23:29,693 INFO L231 Difference]: Finished difference. Result has 68 places, 81 transitions, 319 flow [2022-11-25 17:23:29,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=68, PETRI_TRANSITIONS=81} [2022-11-25 17:23:29,695 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2022-11-25 17:23:29,696 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 81 transitions, 319 flow [2022-11-25 17:23:29,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:29,697 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:29,697 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:23:29,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:23:29,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:23:29,924 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-25 17:23:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:29,924 INFO L85 PathProgramCache]: Analyzing trace with hash 41831448, now seen corresponding path program 1 times [2022-11-25 17:23:29,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:23:29,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793461595] [2022-11-25 17:23:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:29,926 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 [2022-11-25 17:23:29,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:23:29,928 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:23:29,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:23:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:30,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:23:30,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:30,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:30,202 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-25 17:23:30,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-25 17:23:30,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:30,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:23:30,387 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:23:30,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:23:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:30,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:23:30,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:23:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793461595] [2022-11-25 17:23:30,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793461595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:30,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:30,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:23:30,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787744702] [2022-11-25 17:23:30,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:30,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:23:30,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:23:30,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:23:30,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:23:30,827 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 603 [2022-11-25 17:23:30,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:30,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:30,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 603 [2022-11-25 17:23:30,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:33,530 INFO L130 PetriNetUnfolder]: 11884/17107 cut-off events. [2022-11-25 17:23:33,530 INFO L131 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-11-25 17:23:33,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34569 conditions, 17107 events. 11884/17107 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 1037. Compared 99923 event pairs, 10215 based on Foata normal form. 0/7019 useless extension candidates. Maximal degree in co-relation 34555. Up to 17107 conditions per place. [2022-11-25 17:23:33,636 INFO L137 encePairwiseOnDemand]: 600/603 looper letters, 76 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2022-11-25 17:23:33,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 453 flow [2022-11-25 17:23:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:23:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:23:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 780 transitions. [2022-11-25 17:23:33,642 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4311774461028192 [2022-11-25 17:23:33,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 780 transitions. [2022-11-25 17:23:33,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 780 transitions. [2022-11-25 17:23:33,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:33,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 780 transitions. [2022-11-25 17:23:33,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.0) internal successors, (780), 3 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:33,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:33,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:33,654 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 319 flow. Second operand 3 states and 780 transitions. [2022-11-25 17:23:33,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 453 flow [2022-11-25 17:23:33,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 77 transitions, 452 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:23:33,657 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 300 flow [2022-11-25 17:23:33,658 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2022-11-25 17:23:33,662 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2022-11-25 17:23:33,662 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 300 flow [2022-11-25 17:23:33,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:33,664 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:33,664 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:23:33,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-25 17:23:33,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:23:33,877 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-25 17:23:33,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:33,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1474775120, now seen corresponding path program 2 times [2022-11-25 17:23:33,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:23:33,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979248783] [2022-11-25 17:23:33,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:23:33,879 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 [2022-11-25 17:23:33,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:23:33,880 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:23:33,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:23:33,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:23:33,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:34,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:23:34,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:34,163 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:23:34,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:23:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:34,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:35,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:23:35,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979248783] [2022-11-25 17:23:35,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979248783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:35,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:23:35,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:23:35,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145907749] [2022-11-25 17:23:35,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:35,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:23:35,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:23:35,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:23:35,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:23:42,639 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 603 [2022-11-25 17:23:42,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 300 flow. Second operand has 12 states, 12 states have (on average 223.0) internal successors, (2676), 12 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:42,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:42,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 603 [2022-11-25 17:23:42,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:46,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:23:48,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:23:50,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:23:52,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:23:53,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:23:57,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:23:58,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:24:00,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:24:02,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:24:04,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:24:06,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:24:21,533 INFO L130 PetriNetUnfolder]: 39592/56977 cut-off events. [2022-11-25 17:24:21,533 INFO L131 PetriNetUnfolder]: For 550/550 co-relation queries the response was YES. [2022-11-25 17:24:21,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115015 conditions, 56977 events. 39592/56977 cut-off events. For 550/550 co-relation queries the response was YES. Maximal size of possible extension queue 1795. Compared 369931 event pairs, 34050 based on Foata normal form. 15/23360 useless extension candidates. Maximal degree in co-relation 115000. Up to 5713 conditions per place. [2022-11-25 17:24:21,794 INFO L137 encePairwiseOnDemand]: 593/603 looper letters, 468 selfloop transitions, 49 changer transitions 0/517 dead transitions. [2022-11-25 17:24:21,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 517 transitions, 2412 flow [2022-11-25 17:24:21,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:24:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:24:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3862 transitions. [2022-11-25 17:24:21,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4269762299613046 [2022-11-25 17:24:21,809 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3862 transitions. [2022-11-25 17:24:21,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3862 transitions. [2022-11-25 17:24:21,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:21,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3862 transitions. [2022-11-25 17:24:21,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 257.46666666666664) internal successors, (3862), 15 states have internal predecessors, (3862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:21,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 603.0) internal successors, (9648), 16 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:21,840 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 603.0) internal successors, (9648), 16 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:21,841 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 300 flow. Second operand 15 states and 3862 transitions. [2022-11-25 17:24:21,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 517 transitions, 2412 flow [2022-11-25 17:24:21,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 517 transitions, 2411 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:24:21,850 INFO L231 Difference]: Finished difference. Result has 90 places, 105 transitions, 657 flow [2022-11-25 17:24:21,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=657, PETRI_PLACES=90, PETRI_TRANSITIONS=105} [2022-11-25 17:24:21,852 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 23 predicate places. [2022-11-25 17:24:21,852 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 105 transitions, 657 flow [2022-11-25 17:24:21,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 223.0) internal successors, (2676), 12 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:21,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:21,854 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:24:21,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:22,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:22,067 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-25 17:24:22,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:22,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1545350469, now seen corresponding path program 1 times [2022-11-25 17:24:22,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:24:22,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194115399] [2022-11-25 17:24:22,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:22,068 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 [2022-11-25 17:24:22,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:24:22,070 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:24:22,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:24:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:22,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:24:22,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:22,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:22,348 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-25 17:24:22,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-25 17:24:22,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:22,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:24:22,501 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:24:22,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:24:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:22,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:24:22,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:24:22,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194115399] [2022-11-25 17:24:22,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194115399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:22,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:22,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:24:22,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374646315] [2022-11-25 17:24:22,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:22,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:24:22,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:24:22,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:24:22,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:24:22,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 603 [2022-11-25 17:24:22,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 105 transitions, 657 flow. Second operand has 4 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:22,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:22,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 603 [2022-11-25 17:24:22,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:24:31,527 INFO L130 PetriNetUnfolder]: 38372/55097 cut-off events. [2022-11-25 17:24:31,528 INFO L131 PetriNetUnfolder]: For 600/600 co-relation queries the response was YES. [2022-11-25 17:24:31,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111377 conditions, 55097 events. 38372/55097 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 1622. Compared 357515 event pairs, 32990 based on Foata normal form. 0/22955 useless extension candidates. Maximal degree in co-relation 111351. Up to 55097 conditions per place. [2022-11-25 17:24:31,879 INFO L137 encePairwiseOnDemand]: 600/603 looper letters, 102 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2022-11-25 17:24:31,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 103 transitions, 859 flow [2022-11-25 17:24:31,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:24:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:24:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 778 transitions. [2022-11-25 17:24:31,882 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4300718629076838 [2022-11-25 17:24:31,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 778 transitions. [2022-11-25 17:24:31,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 778 transitions. [2022-11-25 17:24:31,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:31,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 778 transitions. [2022-11-25 17:24:31,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:31,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:31,890 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:31,890 INFO L175 Difference]: Start difference. First operand has 90 places, 105 transitions, 657 flow. Second operand 3 states and 778 transitions. [2022-11-25 17:24:31,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 103 transitions, 859 flow [2022-11-25 17:24:31,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 103 transitions, 763 flow, removed 23 selfloop flow, removed 4 redundant places. [2022-11-25 17:24:31,898 INFO L231 Difference]: Finished difference. Result has 86 places, 103 transitions, 559 flow [2022-11-25 17:24:31,899 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=559, PETRI_PLACES=86, PETRI_TRANSITIONS=103} [2022-11-25 17:24:31,899 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2022-11-25 17:24:31,900 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 103 transitions, 559 flow [2022-11-25 17:24:31,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:31,900 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:31,901 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:24:31,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:24:32,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:32,114 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-25 17:24:32,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:32,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1545350468, now seen corresponding path program 1 times [2022-11-25 17:24:32,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:24:32,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712787295] [2022-11-25 17:24:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:32,115 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 [2022-11-25 17:24:32,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:24:32,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:24:32,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b5d938d-08f3-4aa6-9312-e173c12854a9/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:24:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:32,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:24:32,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:32,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:32,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:32,423 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-25 17:24:32,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-25 17:24:32,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-25 17:24:32,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:32,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:24:32,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:32,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:24:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:32,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:24:32,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:24:32,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712787295] [2022-11-25 17:24:32,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712787295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:32,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:32,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:24:32,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027223498] [2022-11-25 17:24:32,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:32,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:24:32,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:24:32,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:24:32,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:24:33,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 603 [2022-11-25 17:24:33,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 103 transitions, 559 flow. Second operand has 4 states, 4 states have (on average 242.5) internal successors, (970), 4 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:33,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:33,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 603 [2022-11-25 17:24:33,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand