./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:16:21,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:16:21,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:16:21,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:16:21,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:16:21,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:16:21,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:16:21,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:16:21,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:16:21,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:16:21,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:16:21,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:16:21,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:16:21,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:16:21,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:16:21,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:16:21,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:16:21,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:16:21,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:16:21,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:16:21,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:16:21,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:16:21,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:16:21,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:16:21,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:16:21,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:16:21,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:16:21,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:16:21,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:16:21,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:16:21,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:16:21,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:16:21,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:16:21,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:16:21,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:16:21,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:16:21,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:16:21,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:16:21,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:16:21,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:16:21,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:16:21,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 18:16:21,890 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:16:21,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:16:21,891 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:16:21,891 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:16:21,892 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:16:21,892 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:16:21,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:16:21,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:16:21,893 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:16:21,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:16:21,893 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:16:21,893 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:16:21,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:16:21,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:16:21,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:16:21,894 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:16:21,894 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:16:21,894 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:16:21,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:16:21,895 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:16:21,895 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:16:21,895 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:16:21,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:16:21,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:16:21,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:16:21,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:16:21,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:16:21,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:16:21,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:16:21,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:16:21,897 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:16:21,897 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:16:21,897 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:16:21,897 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:16:21,898 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_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2022-12-13 18:16:22,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:16:22,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:16:22,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:16:22,130 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:16:22,130 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:16:22,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2022-12-13 18:16:24,651 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:16:24,814 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:16:24,815 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2022-12-13 18:16:24,822 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/data/17749adaf/414355b3277d453fab080683cab29615/FLAG53f1c4ad2 [2022-12-13 18:16:25,247 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/data/17749adaf/414355b3277d453fab080683cab29615 [2022-12-13 18:16:25,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:16:25,254 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:16:25,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:16:25,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:16:25,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:16:25,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:16:25" (1/1) ... [2022-12-13 18:16:25,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733f33ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:25, skipping insertion in model container [2022-12-13 18:16:25,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:16:25" (1/1) ... [2022-12-13 18:16:25,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:16:25,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:16:25,426 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:25,429 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:25,430 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:25,431 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:25,432 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:25,434 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:25,434 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:25,436 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:25,440 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:25,441 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:25,442 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:25,443 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:25,445 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:25,447 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:25,447 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:25,449 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:25,458 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_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2022-12-13 18:16:25,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:16:25,477 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-13 18:16:25,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@34b1f2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:25, skipping insertion in model container [2022-12-13 18:16:25,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:16:25,478 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 18:16:25,480 INFO L158 Benchmark]: Toolchain (without parser) took 225.02ms. Allocated memory is still 142.6MB. Free memory was 107.4MB in the beginning and 96.0MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 18:16:25,480 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 142.6MB. Free memory is still 86.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 18:16:25,481 INFO L158 Benchmark]: CACSL2BoogieTranslator took 221.92ms. Allocated memory is still 142.6MB. Free memory was 106.9MB in the beginning and 96.0MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 18:16:25,483 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 142.6MB. Free memory is still 86.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 221.92ms. Allocated memory is still 142.6MB. Free memory was 106.9MB in the beginning and 96.0MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 171]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:16:26,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:16:26,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:16:26,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:16:26,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:16:26,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:16:26,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:16:26,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:16:26,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:16:27,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:16:27,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:16:27,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:16:27,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:16:27,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:16:27,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:16:27,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:16:27,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:16:27,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:16:27,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:16:27,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:16:27,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:16:27,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:16:27,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:16:27,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:16:27,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:16:27,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:16:27,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:16:27,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:16:27,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:16:27,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:16:27,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:16:27,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:16:27,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:16:27,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:16:27,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:16:27,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:16:27,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:16:27,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:16:27,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:16:27,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:16:27,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:16:27,032 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 18:16:27,054 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:16:27,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:16:27,054 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:16:27,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:16:27,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:16:27,055 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:16:27,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:16:27,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:16:27,056 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:16:27,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:16:27,057 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:16:27,057 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:16:27,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:16:27,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:16:27,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:16:27,058 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:16:27,058 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:16:27,058 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:16:27,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:16:27,058 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:16:27,058 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 18:16:27,059 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 18:16:27,059 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:16:27,059 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:16:27,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:16:27,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:16:27,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:16:27,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:16:27,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:16:27,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:16:27,060 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 18:16:27,061 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 18:16:27,061 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:16:27,061 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:16:27,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:16:27,061 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 18:16:27,061 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:16:27,062 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_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2022-12-13 18:16:27,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:16:27,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:16:27,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:16:27,323 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:16:27,323 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:16:27,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2022-12-13 18:16:29,969 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:16:30,133 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:16:30,133 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2022-12-13 18:16:30,140 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/data/d534753be/378052a671384b28b11e653f224a0065/FLAG203a88725 [2022-12-13 18:16:30,152 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/data/d534753be/378052a671384b28b11e653f224a0065 [2022-12-13 18:16:30,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:16:30,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:16:30,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:16:30,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:16:30,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:16:30,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:16:30" (1/1) ... [2022-12-13 18:16:30,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@418d7d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:30, skipping insertion in model container [2022-12-13 18:16:30,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:16:30" (1/1) ... [2022-12-13 18:16:30,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:16:30,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:16:30,299 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,301 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,302 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,303 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,303 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,305 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,305 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,306 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,309 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,310 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,310 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,311 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,312 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,313 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,313 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,314 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,320 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_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2022-12-13 18:16:30,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:16:30,337 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 18:16:30,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:16:30,343 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,345 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,345 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,346 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,346 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,347 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,347 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,348 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,349 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,350 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,350 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,351 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,357 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_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2022-12-13 18:16:30,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:16:30,363 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:16:30,373 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,374 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,374 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,375 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,375 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,376 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,376 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,377 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,378 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,378 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,379 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,379 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,380 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,381 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,388 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:16:30,389 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:16:30,394 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_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2022-12-13 18:16:30,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:16:30,412 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:16:30,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:30 WrapperNode [2022-12-13 18:16:30,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:16:30,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:16:30,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:16:30,414 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:16:30,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:30" (1/1) ... [2022-12-13 18:16:30,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:30" (1/1) ... [2022-12-13 18:16:30,463 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 325 [2022-12-13 18:16:30,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:16:30,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:16:30,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:16:30,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:16:30,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:30" (1/1) ... [2022-12-13 18:16:30,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:30" (1/1) ... [2022-12-13 18:16:30,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:30" (1/1) ... [2022-12-13 18:16:30,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:30" (1/1) ... [2022-12-13 18:16:30,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:30" (1/1) ... [2022-12-13 18:16:30,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:30" (1/1) ... [2022-12-13 18:16:30,487 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:30" (1/1) ... [2022-12-13 18:16:30,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:30" (1/1) ... [2022-12-13 18:16:30,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:16:30,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:16:30,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:16:30,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:16:30,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:30" (1/1) ... [2022-12-13 18:16:30,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:16:30,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:16:30,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:16:30,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:16:30,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:16:30,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 18:16:30,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:16:30,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 18:16:30,541 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 18:16:30,541 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 18:16:30,541 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 18:16:30,541 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 18:16:30,541 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 18:16:30,541 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 18:16:30,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 18:16:30,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 18:16:30,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 18:16:30,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:16:30,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:16:30,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:16:30,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 18:16:30,544 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 18:16:30,636 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:16:30,637 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:16:31,232 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:16:31,402 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:16:31,402 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 18:16:31,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:16:31 BoogieIcfgContainer [2022-12-13 18:16:31,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:16:31,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:16:31,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:16:31,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:16:31,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:16:30" (1/3) ... [2022-12-13 18:16:31,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f794e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:16:31, skipping insertion in model container [2022-12-13 18:16:31,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:30" (2/3) ... [2022-12-13 18:16:31,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f794e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:16:31, skipping insertion in model container [2022-12-13 18:16:31,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:16:31" (3/3) ... [2022-12-13 18:16:31,410 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2022-12-13 18:16:31,423 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:16:31,423 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2022-12-13 18:16:31,423 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:16:31,496 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 18:16:31,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 300 transitions, 624 flow [2022-12-13 18:16:31,621 INFO L130 PetriNetUnfolder]: 27/297 cut-off events. [2022-12-13 18:16:31,621 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 18:16:31,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 297 events. 27/297 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 310 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 243. Up to 6 conditions per place. [2022-12-13 18:16:31,625 INFO L82 GeneralOperation]: Start removeDead. Operand has 283 places, 300 transitions, 624 flow [2022-12-13 18:16:31,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 275 places, 292 transitions, 602 flow [2022-12-13 18:16:31,633 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:16:31,641 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 275 places, 292 transitions, 602 flow [2022-12-13 18:16:31,643 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 275 places, 292 transitions, 602 flow [2022-12-13 18:16:31,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 275 places, 292 transitions, 602 flow [2022-12-13 18:16:31,692 INFO L130 PetriNetUnfolder]: 27/292 cut-off events. [2022-12-13 18:16:31,692 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 18:16:31,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 292 events. 27/292 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 310 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 243. Up to 6 conditions per place. [2022-12-13 18:16:31,695 INFO L119 LiptonReduction]: Number of co-enabled transitions 4670 [2022-12-13 18:17:03,302 INFO L134 LiptonReduction]: Checked pairs total: 6005 [2022-12-13 18:17:03,302 INFO L136 LiptonReduction]: Total number of compositions: 343 [2022-12-13 18:17:03,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:17:03,321 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;@3f0d1442, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:17:03,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2022-12-13 18:17:03,324 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 18:17:03,324 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:17:03,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:03,325 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:17:03,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:17:03,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:03,329 INFO L85 PathProgramCache]: Analyzing trace with hash 47465, now seen corresponding path program 1 times [2022-12-13 18:17:03,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:03,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067670075] [2022-12-13 18:17:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:03,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:03,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:03,340 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:03,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 18:17:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:03,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:17:03,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:03,579 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:17:03,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:17:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:03,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:17:03,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:03,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067670075] [2022-12-13 18:17:03,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067670075] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:17:03,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:17:03,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:17:03,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125256554] [2022-12-13 18:17:03,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:17:03,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:17:03,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:03,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:17:03,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:17:03,761 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 643 [2022-12-13 18:17:03,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:03,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:03,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 643 [2022-12-13 18:17:03,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:05,450 INFO L130 PetriNetUnfolder]: 4796/6695 cut-off events. [2022-12-13 18:17:05,450 INFO L131 PetriNetUnfolder]: For 153/153 co-relation queries the response was YES. [2022-12-13 18:17:05,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13580 conditions, 6695 events. 4796/6695 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 33387 event pairs, 4049 based on Foata normal form. 0/1335 useless extension candidates. Maximal degree in co-relation 12540. Up to 6695 conditions per place. [2022-12-13 18:17:05,479 INFO L137 encePairwiseOnDemand]: 638/643 looper letters, 55 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2022-12-13 18:17:05,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 242 flow [2022-12-13 18:17:05,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:17:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:17:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 783 transitions. [2022-12-13 18:17:05,491 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4059097978227061 [2022-12-13 18:17:05,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 783 transitions. [2022-12-13 18:17:05,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 783 transitions. [2022-12-13 18:17:05,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:05,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 783 transitions. [2022-12-13 18:17:05,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:05,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:05,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:05,506 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 138 flow. Second operand 3 states and 783 transitions. [2022-12-13 18:17:05,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 242 flow [2022-12-13 18:17:05,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 230 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 18:17:05,513 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 120 flow [2022-12-13 18:17:05,514 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2022-12-13 18:17:05,516 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, -8 predicate places. [2022-12-13 18:17:05,517 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 120 flow [2022-12-13 18:17:05,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:05,517 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:05,517 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:17:05,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:17:05,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:05,719 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:17:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:05,721 INFO L85 PathProgramCache]: Analyzing trace with hash 47466, now seen corresponding path program 1 times [2022-12-13 18:17:05,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:05,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116459046] [2022-12-13 18:17:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:05,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:05,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:05,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:05,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 18:17:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:05,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:17:05,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:05,924 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:17:05,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:17:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:05,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:17:05,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:05,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116459046] [2022-12-13 18:17:05,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116459046] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:17:05,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:17:05,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:17:05,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564129570] [2022-12-13 18:17:05,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:17:05,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:17:05,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:05,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:17:05,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:17:06,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 643 [2022-12-13 18:17:06,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:06,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:06,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 643 [2022-12-13 18:17:06,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:08,175 INFO L130 PetriNetUnfolder]: 9591/13386 cut-off events. [2022-12-13 18:17:08,175 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-12-13 18:17:08,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26918 conditions, 13386 events. 9591/13386 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 1279. Compared 73399 event pairs, 8098 based on Foata normal form. 0/2669 useless extension candidates. Maximal degree in co-relation 26912. Up to 6696 conditions per place. [2022-12-13 18:17:08,244 INFO L137 encePairwiseOnDemand]: 634/643 looper letters, 102 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2022-12-13 18:17:08,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 108 transitions, 446 flow [2022-12-13 18:17:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:17:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:17:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 834 transitions. [2022-12-13 18:17:08,248 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.432348367029549 [2022-12-13 18:17:08,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 834 transitions. [2022-12-13 18:17:08,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 834 transitions. [2022-12-13 18:17:08,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:08,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 834 transitions. [2022-12-13 18:17:08,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:08,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:08,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:08,254 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 120 flow. Second operand 3 states and 834 transitions. [2022-12-13 18:17:08,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 108 transitions, 446 flow [2022-12-13 18:17:08,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 108 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:17:08,256 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 169 flow [2022-12-13 18:17:08,256 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2022-12-13 18:17:08,256 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, -5 predicate places. [2022-12-13 18:17:08,257 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 169 flow [2022-12-13 18:17:08,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:08,257 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:08,257 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 18:17:08,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 18:17:08,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:08,459 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:17:08,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:08,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1478643, now seen corresponding path program 1 times [2022-12-13 18:17:08,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:08,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516141072] [2022-12-13 18:17:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:08,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:08,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:08,467 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:08,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 18:17:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:08,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:17:08,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:08,663 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:17:08,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:17:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:08,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:17:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:08,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:08,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516141072] [2022-12-13 18:17:08,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516141072] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:17:08,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:17:08,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 18:17:08,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858978415] [2022-12-13 18:17:08,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:17:08,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:17:08,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:08,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:17:08,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:17:09,999 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 643 [2022-12-13 18:17:10,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 169 flow. Second operand has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:10,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:10,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 643 [2022-12-13 18:17:10,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:14,640 INFO L130 PetriNetUnfolder]: 14396/20093 cut-off events. [2022-12-13 18:17:14,640 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-12-13 18:17:14,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40445 conditions, 20093 events. 14396/20093 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 1436. Compared 114607 event pairs, 12147 based on Foata normal form. 0/4024 useless extension candidates. Maximal degree in co-relation 40436. Up to 6697 conditions per place. [2022-12-13 18:17:14,719 INFO L137 encePairwiseOnDemand]: 631/643 looper letters, 149 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2022-12-13 18:17:14,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 176 transitions, 805 flow [2022-12-13 18:17:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:17:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:17:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1541 transitions. [2022-12-13 18:17:14,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39942975635044065 [2022-12-13 18:17:14,724 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1541 transitions. [2022-12-13 18:17:14,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1541 transitions. [2022-12-13 18:17:14,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:14,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1541 transitions. [2022-12-13 18:17:14,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 256.8333333333333) internal successors, (1541), 6 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:14,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 643.0) internal successors, (4501), 7 states have internal predecessors, (4501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:14,736 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 643.0) internal successors, (4501), 7 states have internal predecessors, (4501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:14,736 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 169 flow. Second operand 6 states and 1541 transitions. [2022-12-13 18:17:14,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 176 transitions, 805 flow [2022-12-13 18:17:14,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 176 transitions, 781 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:17:14,740 INFO L231 Difference]: Finished difference. Result has 66 places, 82 transitions, 361 flow [2022-12-13 18:17:14,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=82} [2022-12-13 18:17:14,741 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 2 predicate places. [2022-12-13 18:17:14,741 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 82 transitions, 361 flow [2022-12-13 18:17:14,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:14,742 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:14,742 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:17:14,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 18:17:14,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:14,943 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:17:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:14,944 INFO L85 PathProgramCache]: Analyzing trace with hash 45895045, now seen corresponding path program 1 times [2022-12-13 18:17:14,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:14,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347134796] [2022-12-13 18:17:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:14,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:14,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:14,946 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:14,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 18:17:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:15,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:17:15,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:15,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:15,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:15,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:15,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:15,145 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-13 18:17:15,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-13 18:17:15,169 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 18:17:15,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 18:17:15,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:15,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:17:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:15,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:17:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:15,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:17:15,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:15,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347134796] [2022-12-13 18:17:15,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347134796] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:17:15,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:17:15,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:17:15,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291024803] [2022-12-13 18:17:15,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:17:15,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:17:15,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:15,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:17:15,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:17:15,507 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 643 [2022-12-13 18:17:15,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 82 transitions, 361 flow. Second operand has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:15,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:15,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 643 [2022-12-13 18:17:15,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:17,652 INFO L130 PetriNetUnfolder]: 11154/15768 cut-off events. [2022-12-13 18:17:17,652 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2022-12-13 18:17:17,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31857 conditions, 15768 events. 11154/15768 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 1447. Compared 90798 event pairs, 9375 based on Foata normal form. 0/3557 useless extension candidates. Maximal degree in co-relation 31844. Up to 15768 conditions per place. [2022-12-13 18:17:17,701 INFO L137 encePairwiseOnDemand]: 640/643 looper letters, 77 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2022-12-13 18:17:17,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 497 flow [2022-12-13 18:17:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:17:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:17:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2022-12-13 18:17:17,703 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41472265422498705 [2022-12-13 18:17:17,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2022-12-13 18:17:17,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2022-12-13 18:17:17,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:17,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2022-12-13 18:17:17,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:17,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:17,707 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:17,707 INFO L175 Difference]: Start difference. First operand has 66 places, 82 transitions, 361 flow. Second operand 3 states and 800 transitions. [2022-12-13 18:17:17,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 497 flow [2022-12-13 18:17:17,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 78 transitions, 467 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 18:17:17,710 INFO L231 Difference]: Finished difference. Result has 65 places, 78 transitions, 313 flow [2022-12-13 18:17:17,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=313, PETRI_PLACES=65, PETRI_TRANSITIONS=78} [2022-12-13 18:17:17,711 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2022-12-13 18:17:17,711 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 78 transitions, 313 flow [2022-12-13 18:17:17,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:17,712 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:17,712 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:17:17,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 18:17:17,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:17,914 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:17:17,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:17,915 INFO L85 PathProgramCache]: Analyzing trace with hash 45895044, now seen corresponding path program 1 times [2022-12-13 18:17:17,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:17,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972538080] [2022-12-13 18:17:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:17,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:17,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:17,922 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:17,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 18:17:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:18,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 18:17:18,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:18,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:18,127 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-13 18:17:18,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-12-13 18:17:18,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:18,362 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 18:17:18,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 18:17:18,631 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-12-13 18:17:18,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 76 [2022-12-13 18:17:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:19,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:17:19,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:19,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972538080] [2022-12-13 18:17:19,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972538080] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:17:19,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:17:19,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:17:19,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386849878] [2022-12-13 18:17:19,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:17:19,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:17:19,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:19,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:17:19,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:17:19,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 643 [2022-12-13 18:17:19,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 78 transitions, 313 flow. Second operand has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:19,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:19,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 643 [2022-12-13 18:17:19,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:21,294 INFO L130 PetriNetUnfolder]: 7912/11443 cut-off events. [2022-12-13 18:17:21,294 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-12-13 18:17:21,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23181 conditions, 11443 events. 7912/11443 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 65081 event pairs, 6603 based on Foata normal form. 0/3089 useless extension candidates. Maximal degree in co-relation 23167. Up to 11443 conditions per place. [2022-12-13 18:17:21,334 INFO L137 encePairwiseOnDemand]: 640/643 looper letters, 73 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2022-12-13 18:17:21,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 74 transitions, 441 flow [2022-12-13 18:17:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:17:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:17:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 798 transitions. [2022-12-13 18:17:21,337 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41368584758942456 [2022-12-13 18:17:21,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 798 transitions. [2022-12-13 18:17:21,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 798 transitions. [2022-12-13 18:17:21,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:21,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 798 transitions. [2022-12-13 18:17:21,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:21,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:21,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:21,342 INFO L175 Difference]: Start difference. First operand has 65 places, 78 transitions, 313 flow. Second operand 3 states and 798 transitions. [2022-12-13 18:17:21,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 74 transitions, 441 flow [2022-12-13 18:17:21,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:17:21,344 INFO L231 Difference]: Finished difference. Result has 64 places, 74 transitions, 294 flow [2022-12-13 18:17:21,344 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=64, PETRI_TRANSITIONS=74} [2022-12-13 18:17:21,344 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2022-12-13 18:17:21,345 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 294 flow [2022-12-13 18:17:21,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:21,345 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:21,345 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:17:21,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-13 18:17:21,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:21,546 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:17:21,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:21,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1155502115, now seen corresponding path program 1 times [2022-12-13 18:17:21,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:21,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090683470] [2022-12-13 18:17:21,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:21,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:21,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:21,548 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:21,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 18:17:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:21,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 18:17:21,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:21,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:17:21,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:21,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090683470] [2022-12-13 18:17:21,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090683470] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:17:21,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:17:21,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:17:21,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482126874] [2022-12-13 18:17:21,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:17:21,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:17:21,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:17:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:17:21,627 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 643 [2022-12-13 18:17:21,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 74 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:21,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:21,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 643 [2022-12-13 18:17:21,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:23,945 INFO L130 PetriNetUnfolder]: 10840/15481 cut-off events. [2022-12-13 18:17:23,945 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-12-13 18:17:23,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31300 conditions, 15481 events. 10840/15481 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 999. Compared 93947 event pairs, 2931 based on Foata normal form. 0/4271 useless extension candidates. Maximal degree in co-relation 31285. Up to 9715 conditions per place. [2022-12-13 18:17:23,998 INFO L137 encePairwiseOnDemand]: 633/643 looper letters, 105 selfloop transitions, 4 changer transitions 0/109 dead transitions. [2022-12-13 18:17:23,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 587 flow [2022-12-13 18:17:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:17:23,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:17:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 843 transitions. [2022-12-13 18:17:24,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4370139968895801 [2022-12-13 18:17:24,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 843 transitions. [2022-12-13 18:17:24,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 843 transitions. [2022-12-13 18:17:24,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:24,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 843 transitions. [2022-12-13 18:17:24,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:24,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:24,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:24,004 INFO L175 Difference]: Start difference. First operand has 64 places, 74 transitions, 294 flow. Second operand 3 states and 843 transitions. [2022-12-13 18:17:24,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 587 flow [2022-12-13 18:17:24,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 586 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:17:24,006 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 333 flow [2022-12-13 18:17:24,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=333, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2022-12-13 18:17:24,006 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2022-12-13 18:17:24,006 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 333 flow [2022-12-13 18:17:24,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:24,007 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:24,007 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:17:24,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 18:17:24,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:24,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:17:24,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1155502011, now seen corresponding path program 1 times [2022-12-13 18:17:24,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:24,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162145997] [2022-12-13 18:17:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:24,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:24,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:24,209 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:24,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 18:17:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:24,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:17:24,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:24,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:17:24,286 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:24,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162145997] [2022-12-13 18:17:24,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162145997] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:17:24,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:17:24,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:17:24,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149903425] [2022-12-13 18:17:24,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:17:24,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:17:24,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:24,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:17:24,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:17:24,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 643 [2022-12-13 18:17:24,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 333 flow. Second operand has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:24,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:24,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 643 [2022-12-13 18:17:24,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:28,227 INFO L130 PetriNetUnfolder]: 18112/26029 cut-off events. [2022-12-13 18:17:28,227 INFO L131 PetriNetUnfolder]: For 5091/5091 co-relation queries the response was YES. [2022-12-13 18:17:28,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58951 conditions, 26029 events. 18112/26029 cut-off events. For 5091/5091 co-relation queries the response was YES. Maximal size of possible extension queue 1644. Compared 170276 event pairs, 7095 based on Foata normal form. 600/9827 useless extension candidates. Maximal degree in co-relation 58933. Up to 16117 conditions per place. [2022-12-13 18:17:28,328 INFO L137 encePairwiseOnDemand]: 636/643 looper letters, 108 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2022-12-13 18:17:28,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 111 transitions, 641 flow [2022-12-13 18:17:28,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:17:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:17:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 845 transitions. [2022-12-13 18:17:28,330 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4380508035251426 [2022-12-13 18:17:28,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 845 transitions. [2022-12-13 18:17:28,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 845 transitions. [2022-12-13 18:17:28,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:28,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 845 transitions. [2022-12-13 18:17:28,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:28,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:28,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:28,334 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 333 flow. Second operand 3 states and 845 transitions. [2022-12-13 18:17:28,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 111 transitions, 641 flow [2022-12-13 18:17:28,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 111 transitions, 631 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:17:28,392 INFO L231 Difference]: Finished difference. Result has 68 places, 79 transitions, 354 flow [2022-12-13 18:17:28,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=325, 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=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=354, PETRI_PLACES=68, PETRI_TRANSITIONS=79} [2022-12-13 18:17:28,393 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 4 predicate places. [2022-12-13 18:17:28,393 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 79 transitions, 354 flow [2022-12-13 18:17:28,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:28,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:28,393 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:17:28,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-12-13 18:17:28,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:28,594 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:17:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:28,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1155502062, now seen corresponding path program 1 times [2022-12-13 18:17:28,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:28,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626584798] [2022-12-13 18:17:28,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:28,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:28,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:28,601 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:28,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 18:17:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:28,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 18:17:28,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:28,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:28,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:28,781 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-13 18:17:28,781 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 [2022-12-13 18:17:28,792 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 26 treesize of output 24 [2022-12-13 18:17:28,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:28,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:17:28,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:28,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:17:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:28,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:17:28,899 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:28,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626584798] [2022-12-13 18:17:28,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626584798] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:17:28,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:17:28,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:17:28,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817384903] [2022-12-13 18:17:28,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:17:28,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:17:28,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:28,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:17:28,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:17:29,110 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 643 [2022-12-13 18:17:29,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 79 transitions, 354 flow. Second operand has 4 states, 4 states have (on average 249.5) internal successors, (998), 4 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:29,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:29,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 643 [2022-12-13 18:17:29,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:33,039 INFO L130 PetriNetUnfolder]: 17224/24685 cut-off events. [2022-12-13 18:17:33,039 INFO L131 PetriNetUnfolder]: For 4956/4956 co-relation queries the response was YES. [2022-12-13 18:17:33,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59882 conditions, 24685 events. 17224/24685 cut-off events. For 4956/4956 co-relation queries the response was YES. Maximal size of possible extension queue 1643. Compared 154162 event pairs, 14382 based on Foata normal form. 0/11231 useless extension candidates. Maximal degree in co-relation 59863. Up to 24685 conditions per place. [2022-12-13 18:17:33,140 INFO L137 encePairwiseOnDemand]: 640/643 looper letters, 76 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2022-12-13 18:17:33,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 504 flow [2022-12-13 18:17:33,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:17:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:17:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2022-12-13 18:17:33,142 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4126490409538621 [2022-12-13 18:17:33,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2022-12-13 18:17:33,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2022-12-13 18:17:33,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:33,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2022-12-13 18:17:33,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:33,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:33,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:33,146 INFO L175 Difference]: Start difference. First operand has 68 places, 79 transitions, 354 flow. Second operand 3 states and 796 transitions. [2022-12-13 18:17:33,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 504 flow [2022-12-13 18:17:33,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 77 transitions, 501 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:17:33,150 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 349 flow [2022-12-13 18:17:33,150 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=347, 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=349, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2022-12-13 18:17:33,151 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2022-12-13 18:17:33,151 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 349 flow [2022-12-13 18:17:33,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 249.5) internal successors, (998), 4 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:33,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:33,151 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:17:33,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 18:17:33,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:33,353 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:17:33,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:33,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1155502061, now seen corresponding path program 1 times [2022-12-13 18:17:33,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:33,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518670743] [2022-12-13 18:17:33,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:33,354 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:33,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:33,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:33,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 18:17:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:33,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 18:17:33,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:33,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:33,534 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-13 18:17:33,534 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 [2022-12-13 18:17:33,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:33,605 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 [2022-12-13 18:17:33,633 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 18:17:33,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 18:17:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:33,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:17:33,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:33,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518670743] [2022-12-13 18:17:33,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518670743] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:17:33,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:17:33,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:17:33,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393536863] [2022-12-13 18:17:33,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:17:33,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:17:33,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:33,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:17:33,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:17:33,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 643 [2022-12-13 18:17:33,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 349 flow. Second operand has 4 states, 4 states have (on average 249.5) internal successors, (998), 4 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:33,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:33,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 643 [2022-12-13 18:17:33,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:37,521 INFO L130 PetriNetUnfolder]: 16336/23341 cut-off events. [2022-12-13 18:17:37,521 INFO L131 PetriNetUnfolder]: For 4809/4809 co-relation queries the response was YES. [2022-12-13 18:17:37,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56121 conditions, 23341 events. 16336/23341 cut-off events. For 4809/4809 co-relation queries the response was YES. Maximal size of possible extension queue 1618. Compared 144082 event pairs, 13605 based on Foata normal form. 0/10931 useless extension candidates. Maximal degree in co-relation 56101. Up to 23341 conditions per place. [2022-12-13 18:17:37,617 INFO L137 encePairwiseOnDemand]: 640/643 looper letters, 74 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2022-12-13 18:17:37,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 75 transitions, 495 flow [2022-12-13 18:17:37,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:17:37,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:17:37,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 794 transitions. [2022-12-13 18:17:37,620 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41161223431829963 [2022-12-13 18:17:37,620 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 794 transitions. [2022-12-13 18:17:37,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 794 transitions. [2022-12-13 18:17:37,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:37,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 794 transitions. [2022-12-13 18:17:37,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.6666666666667) internal successors, (794), 3 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:37,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:37,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:37,623 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 349 flow. Second operand 3 states and 794 transitions. [2022-12-13 18:17:37,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 75 transitions, 495 flow [2022-12-13 18:17:37,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:17:37,626 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 346 flow [2022-12-13 18:17:37,626 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2022-12-13 18:17:37,627 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 2 predicate places. [2022-12-13 18:17:37,627 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 346 flow [2022-12-13 18:17:37,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 249.5) internal successors, (998), 4 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:37,627 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:37,627 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 18:17:37,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-12-13 18:17:37,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:37,829 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:17:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:37,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1107727274, now seen corresponding path program 2 times [2022-12-13 18:17:37,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:37,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053747101] [2022-12-13 18:17:37,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:17:37,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:37,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:37,834 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:37,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 18:17:37,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:17:37,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:17:37,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 18:17:37,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:38,055 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:17:38,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:17:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:38,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:17:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:38,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:38,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053747101] [2022-12-13 18:17:38,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053747101] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:17:38,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:17:38,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:17:38,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752360429] [2022-12-13 18:17:38,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:17:38,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:17:38,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:38,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:17:38,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:17:43,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 643 [2022-12-13 18:17:43,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 346 flow. Second operand has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:43,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:43,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 643 [2022-12-13 18:17:43,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:47,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:17:49,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:17:51,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:17:53,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:17:54,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:17:56,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:17:57,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:17:59,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:18:01,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:18:03,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:18:05,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:18:06,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:18:09,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:18:25,013 INFO L130 PetriNetUnfolder]: 54434/77762 cut-off events. [2022-12-13 18:18:25,013 INFO L131 PetriNetUnfolder]: For 16056/16056 co-relation queries the response was YES. [2022-12-13 18:18:25,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186863 conditions, 77762 events. 54434/77762 cut-off events. For 16056/16056 co-relation queries the response was YES. Maximal size of possible extension queue 2627. Compared 525341 event pairs, 45350 based on Foata normal form. 16/36404 useless extension candidates. Maximal degree in co-relation 186842. Up to 13561 conditions per place. [2022-12-13 18:18:25,394 INFO L137 encePairwiseOnDemand]: 633/643 looper letters, 450 selfloop transitions, 52 changer transitions 0/502 dead transitions. [2022-12-13 18:18:25,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 502 transitions, 2822 flow [2022-12-13 18:18:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 18:18:25,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 18:18:25,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3903 transitions. [2022-12-13 18:18:25,401 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40466562986003113 [2022-12-13 18:18:25,401 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3903 transitions. [2022-12-13 18:18:25,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3903 transitions. [2022-12-13 18:18:25,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:18:25,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3903 transitions. [2022-12-13 18:18:25,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 260.2) internal successors, (3903), 15 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:25,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 643.0) internal successors, (10288), 16 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:25,416 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 643.0) internal successors, (10288), 16 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:25,416 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 346 flow. Second operand 15 states and 3903 transitions. [2022-12-13 18:18:25,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 502 transitions, 2822 flow [2022-12-13 18:18:25,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 502 transitions, 2821 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:18:25,423 INFO L231 Difference]: Finished difference. Result has 87 places, 106 transitions, 725 flow [2022-12-13 18:18:25,423 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=725, PETRI_PLACES=87, PETRI_TRANSITIONS=106} [2022-12-13 18:18:25,424 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 23 predicate places. [2022-12-13 18:18:25,424 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 106 transitions, 725 flow [2022-12-13 18:18:25,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:25,425 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:18:25,425 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:18:25,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 18:18:25,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:18:25,626 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:18:25,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:18:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1460829307, now seen corresponding path program 1 times [2022-12-13 18:18:25,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:18:25,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358949009] [2022-12-13 18:18:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:18:25,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:18:25,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:18:25,633 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:18:25,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 18:18:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:18:25,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:18:25,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:18:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:18:25,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:18:25,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:18:25,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358949009] [2022-12-13 18:18:25,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358949009] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:18:25,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:18:25,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:18:25,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552661456] [2022-12-13 18:18:25,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:18:25,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:18:25,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:18:25,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:18:25,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:18:25,803 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 643 [2022-12-13 18:18:25,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 106 transitions, 725 flow. Second operand has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:25,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:18:25,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 643 [2022-12-13 18:18:25,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:18:33,806 INFO L130 PetriNetUnfolder]: 37974/54442 cut-off events. [2022-12-13 18:18:33,807 INFO L131 PetriNetUnfolder]: For 8474/8474 co-relation queries the response was YES. [2022-12-13 18:18:33,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132085 conditions, 54442 events. 37974/54442 cut-off events. For 8474/8474 co-relation queries the response was YES. Maximal size of possible extension queue 1756. Compared 375698 event pairs, 13070 based on Foata normal form. 980/26658 useless extension candidates. Maximal degree in co-relation 132055. Up to 46961 conditions per place. [2022-12-13 18:18:34,193 INFO L137 encePairwiseOnDemand]: 639/643 looper letters, 127 selfloop transitions, 3 changer transitions 0/130 dead transitions. [2022-12-13 18:18:34,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 130 transitions, 1037 flow [2022-12-13 18:18:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:18:34,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:18:34,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 822 transitions. [2022-12-13 18:18:34,195 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4261275272161742 [2022-12-13 18:18:34,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 822 transitions. [2022-12-13 18:18:34,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 822 transitions. [2022-12-13 18:18:34,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:18:34,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 822 transitions. [2022-12-13 18:18:34,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:34,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:34,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:34,199 INFO L175 Difference]: Start difference. First operand has 87 places, 106 transitions, 725 flow. Second operand 3 states and 822 transitions. [2022-12-13 18:18:34,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 130 transitions, 1037 flow [2022-12-13 18:18:34,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 130 transitions, 940 flow, removed 23 selfloop flow, removed 4 redundant places. [2022-12-13 18:18:34,206 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 639 flow [2022-12-13 18:18:34,207 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=639, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2022-12-13 18:18:34,207 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 22 predicate places. [2022-12-13 18:18:34,207 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 639 flow [2022-12-13 18:18:34,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:34,207 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:18:34,207 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:18:34,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 18:18:34,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:18:34,409 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:18:34,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:18:34,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1959014079, now seen corresponding path program 1 times [2022-12-13 18:18:34,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:18:34,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756372252] [2022-12-13 18:18:34,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:18:34,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:18:34,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:18:34,415 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:18:34,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 18:18:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:18:34,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 18:18:34,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:18:34,686 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 18:18:34,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-12-13 18:18:34,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:18:34,728 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 [2022-12-13 18:18:34,762 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 18:18:34,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 18:18:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:18:34,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:18:34,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:18:34,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756372252] [2022-12-13 18:18:34,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756372252] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:18:34,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:18:34,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:18:34,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779082877] [2022-12-13 18:18:34,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:18:34,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:18:34,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:18:34,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:18:34,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:18:35,012 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 643 [2022-12-13 18:18:35,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 639 flow. Second operand has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:35,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:18:35,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 643 [2022-12-13 18:18:35,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:18:42,688 INFO L130 PetriNetUnfolder]: 36054/51502 cut-off events. [2022-12-13 18:18:42,688 INFO L131 PetriNetUnfolder]: For 13989/13989 co-relation queries the response was YES. [2022-12-13 18:18:42,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127417 conditions, 51502 events. 36054/51502 cut-off events. For 13989/13989 co-relation queries the response was YES. Maximal size of possible extension queue 1572. Compared 332046 event pairs, 29160 based on Foata normal form. 0/24922 useless extension candidates. Maximal degree in co-relation 127385. Up to 51502 conditions per place. [2022-12-13 18:18:43,007 INFO L137 encePairwiseOnDemand]: 640/643 looper letters, 103 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2022-12-13 18:18:43,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 104 transitions, 843 flow [2022-12-13 18:18:43,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:18:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:18:43,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 780 transitions. [2022-12-13 18:18:43,010 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40435458786936235 [2022-12-13 18:18:43,010 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 780 transitions. [2022-12-13 18:18:43,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 780 transitions. [2022-12-13 18:18:43,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:18:43,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 780 transitions. [2022-12-13 18:18:43,012 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) [2022-12-13 18:18:43,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:43,014 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:43,014 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 639 flow. Second operand 3 states and 780 transitions. [2022-12-13 18:18:43,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 104 transitions, 843 flow [2022-12-13 18:18:43,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 104 transitions, 837 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:18:43,029 INFO L231 Difference]: Finished difference. Result has 84 places, 104 transitions, 631 flow [2022-12-13 18:18:43,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=631, PETRI_PLACES=84, PETRI_TRANSITIONS=104} [2022-12-13 18:18:43,029 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 20 predicate places. [2022-12-13 18:18:43,030 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 104 transitions, 631 flow [2022-12-13 18:18:43,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:43,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:18:43,030 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:18:43,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 18:18:43,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:18:43,231 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:18:43,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:18:43,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1959014081, now seen corresponding path program 1 times [2022-12-13 18:18:43,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:18:43,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141734711] [2022-12-13 18:18:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:18:43,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:18:43,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:18:43,237 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:18:43,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 18:18:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:18:43,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 18:18:43,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:18:43,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:18:43,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:18:43,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:18:43,447 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 18:18:43,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-13 18:18:43,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:18:43,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 18:18:43,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:18:43,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:18:43,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:18:43,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:18:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:18:43,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:18:43,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:18:43,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141734711] [2022-12-13 18:18:43,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141734711] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:18:43,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:18:43,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:18:43,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534333005] [2022-12-13 18:18:43,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:18:43,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:18:43,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:18:43,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:18:43,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:18:43,826 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 643 [2022-12-13 18:18:43,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 104 transitions, 631 flow. Second operand has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:43,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:18:43,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 643 [2022-12-13 18:18:43,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:18:51,345 INFO L130 PetriNetUnfolder]: 34134/48562 cut-off events. [2022-12-13 18:18:51,346 INFO L131 PetriNetUnfolder]: For 12619/12619 co-relation queries the response was YES. [2022-12-13 18:18:51,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119387 conditions, 48562 events. 34134/48562 cut-off events. For 12619/12619 co-relation queries the response was YES. Maximal size of possible extension queue 1455. Compared 307472 event pairs, 27570 based on Foata normal form. 0/24162 useless extension candidates. Maximal degree in co-relation 119355. Up to 48562 conditions per place. [2022-12-13 18:18:51,644 INFO L137 encePairwiseOnDemand]: 640/643 looper letters, 101 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2022-12-13 18:18:51,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 102 transitions, 831 flow [2022-12-13 18:18:51,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:18:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:18:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 790 transitions. [2022-12-13 18:18:51,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4095386210471747 [2022-12-13 18:18:51,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 790 transitions. [2022-12-13 18:18:51,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 790 transitions. [2022-12-13 18:18:51,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:18:51,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 790 transitions. [2022-12-13 18:18:51,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:51,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:51,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:51,650 INFO L175 Difference]: Start difference. First operand has 84 places, 104 transitions, 631 flow. Second operand 3 states and 790 transitions. [2022-12-13 18:18:51,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 102 transitions, 831 flow [2022-12-13 18:18:51,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 102 transitions, 830 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:18:51,654 INFO L231 Difference]: Finished difference. Result has 83 places, 102 transitions, 628 flow [2022-12-13 18:18:51,654 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=628, PETRI_PLACES=83, PETRI_TRANSITIONS=102} [2022-12-13 18:18:51,655 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 19 predicate places. [2022-12-13 18:18:51,655 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 102 transitions, 628 flow [2022-12-13 18:18:51,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:51,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:18:51,655 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:18:51,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-12-13 18:18:51,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:18:51,857 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:18:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:18:51,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1959014073, now seen corresponding path program 1 times [2022-12-13 18:18:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:18:51,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431419852] [2022-12-13 18:18:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:18:51,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:18:51,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:18:51,862 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:18:51,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 18:18:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:18:51,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 18:18:51,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:18:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:18:51,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:18:51,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:18:51,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431419852] [2022-12-13 18:18:51,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431419852] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:18:51,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:18:51,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:18:51,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242860168] [2022-12-13 18:18:51,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:18:51,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:18:51,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:18:51,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:18:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:18:51,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 643 [2022-12-13 18:18:51,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 102 transitions, 628 flow. Second operand has 3 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) [2022-12-13 18:18:51,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:18:51,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 643 [2022-12-13 18:18:51,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:19:01,314 INFO L130 PetriNetUnfolder]: 44814/62082 cut-off events. [2022-12-13 18:19:01,314 INFO L131 PetriNetUnfolder]: For 15279/15279 co-relation queries the response was YES. [2022-12-13 18:19:01,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152988 conditions, 62082 events. 44814/62082 cut-off events. For 15279/15279 co-relation queries the response was YES. Maximal size of possible extension queue 1850. Compared 394964 event pairs, 18430 based on Foata normal form. 0/31282 useless extension candidates. Maximal degree in co-relation 152955. Up to 32442 conditions per place. [2022-12-13 18:19:01,758 INFO L137 encePairwiseOnDemand]: 637/643 looper letters, 129 selfloop transitions, 5 changer transitions 0/134 dead transitions. [2022-12-13 18:19:01,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 134 transitions, 1006 flow [2022-12-13 18:19:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:19:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:19:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 831 transitions. [2022-12-13 18:19:01,761 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4307931570762053 [2022-12-13 18:19:01,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 831 transitions. [2022-12-13 18:19:01,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 831 transitions. [2022-12-13 18:19:01,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:19:01,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 831 transitions. [2022-12-13 18:19:01,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:01,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:01,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:01,764 INFO L175 Difference]: Start difference. First operand has 83 places, 102 transitions, 628 flow. Second operand 3 states and 831 transitions. [2022-12-13 18:19:01,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 134 transitions, 1006 flow [2022-12-13 18:19:01,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 134 transitions, 1005 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:19:01,770 INFO L231 Difference]: Finished difference. Result has 86 places, 105 transitions, 665 flow [2022-12-13 18:19:01,771 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=665, PETRI_PLACES=86, PETRI_TRANSITIONS=105} [2022-12-13 18:19:01,771 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 22 predicate places. [2022-12-13 18:19:01,771 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 105 transitions, 665 flow [2022-12-13 18:19:01,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-12-13 18:19:01,771 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:19:01,772 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:19:01,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 18:19:01,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:19:01,973 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:19:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:19:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1959014106, now seen corresponding path program 1 times [2022-12-13 18:19:01,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:19:01,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172204079] [2022-12-13 18:19:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:19:01,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:19:01,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:19:01,976 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:19:01,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 18:19:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:19:02,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:19:02,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:19:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:19:02,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:19:02,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:19:02,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172204079] [2022-12-13 18:19:02,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172204079] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:19:02,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:19:02,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:19:02,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922374828] [2022-12-13 18:19:02,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:19:02,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:19:02,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:19:02,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:19:02,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:19:02,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 643 [2022-12-13 18:19:02,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 105 transitions, 665 flow. Second operand has 3 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) [2022-12-13 18:19:02,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:19:02,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 643 [2022-12-13 18:19:02,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:19:11,676 INFO L130 PetriNetUnfolder]: 42454/59722 cut-off events. [2022-12-13 18:19:11,676 INFO L131 PetriNetUnfolder]: For 36539/36539 co-relation queries the response was YES. [2022-12-13 18:19:11,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166951 conditions, 59722 events. 42454/59722 cut-off events. For 36539/36539 co-relation queries the response was YES. Maximal size of possible extension queue 1953. Compared 380836 event pairs, 11270 based on Foata normal form. 1680/37682 useless extension candidates. Maximal degree in co-relation 166915. Up to 44041 conditions per place. [2022-12-13 18:19:12,114 INFO L137 encePairwiseOnDemand]: 639/643 looper letters, 124 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2022-12-13 18:19:12,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 126 transitions, 979 flow [2022-12-13 18:19:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:19:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:19:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 825 transitions. [2022-12-13 18:19:12,117 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4276827371695179 [2022-12-13 18:19:12,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 825 transitions. [2022-12-13 18:19:12,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 825 transitions. [2022-12-13 18:19:12,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:19:12,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 825 transitions. [2022-12-13 18:19:12,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:12,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:12,120 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:12,120 INFO L175 Difference]: Start difference. First operand has 86 places, 105 transitions, 665 flow. Second operand 3 states and 825 transitions. [2022-12-13 18:19:12,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 126 transitions, 979 flow [2022-12-13 18:19:12,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 967 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:19:12,140 INFO L231 Difference]: Finished difference. Result has 87 places, 105 transitions, 669 flow [2022-12-13 18:19:12,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=669, PETRI_PLACES=87, PETRI_TRANSITIONS=105} [2022-12-13 18:19:12,141 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 23 predicate places. [2022-12-13 18:19:12,141 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 105 transitions, 669 flow [2022-12-13 18:19:12,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-12-13 18:19:12,141 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:19:12,141 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:19:12,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-12-13 18:19:12,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:19:12,342 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:19:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:19:12,343 INFO L85 PathProgramCache]: Analyzing trace with hash -599891338, now seen corresponding path program 1 times [2022-12-13 18:19:12,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:19:12,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831535384] [2022-12-13 18:19:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:19:12,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:19:12,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:19:12,348 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:19:12,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 18:19:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:19:12,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:19:12,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:19:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:19:12,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:19:12,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:19:12,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831535384] [2022-12-13 18:19:12,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831535384] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:19:12,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:19:12,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:19:12,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092007522] [2022-12-13 18:19:12,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:19:12,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:19:12,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:19:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:19:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:19:12,526 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 643 [2022-12-13 18:19:12,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 105 transitions, 669 flow. Second operand has 4 states, 4 states have (on average 250.25) internal successors, (1001), 4 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:12,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:19:12,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 643 [2022-12-13 18:19:12,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:19:19,383 INFO L130 PetriNetUnfolder]: 32534/45742 cut-off events. [2022-12-13 18:19:19,383 INFO L131 PetriNetUnfolder]: For 15919/15919 co-relation queries the response was YES. [2022-12-13 18:19:19,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126972 conditions, 45742 events. 32534/45742 cut-off events. For 15919/15919 co-relation queries the response was YES. Maximal size of possible extension queue 1587. Compared 280861 event pairs, 5650 based on Foata normal form. 1000/27182 useless extension candidates. Maximal degree in co-relation 126935. Up to 20060 conditions per place. [2022-12-13 18:19:19,671 INFO L137 encePairwiseOnDemand]: 638/643 looper letters, 138 selfloop transitions, 5 changer transitions 0/143 dead transitions. [2022-12-13 18:19:19,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 143 transitions, 1062 flow [2022-12-13 18:19:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:19:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:19:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1082 transitions. [2022-12-13 18:19:19,674 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42068429237947125 [2022-12-13 18:19:19,674 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1082 transitions. [2022-12-13 18:19:19,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1082 transitions. [2022-12-13 18:19:19,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:19:19,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1082 transitions. [2022-12-13 18:19:19,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 270.5) internal successors, (1082), 4 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:19,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 643.0) internal successors, (3215), 5 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:19,678 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 643.0) internal successors, (3215), 5 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:19,678 INFO L175 Difference]: Start difference. First operand has 87 places, 105 transitions, 669 flow. Second operand 4 states and 1082 transitions. [2022-12-13 18:19:19,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 143 transitions, 1062 flow [2022-12-13 18:19:19,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 143 transitions, 1056 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 18:19:19,725 INFO L231 Difference]: Finished difference. Result has 89 places, 104 transitions, 666 flow [2022-12-13 18:19:19,726 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=666, PETRI_PLACES=89, PETRI_TRANSITIONS=104} [2022-12-13 18:19:19,726 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 25 predicate places. [2022-12-13 18:19:19,726 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 104 transitions, 666 flow [2022-12-13 18:19:19,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 250.25) internal successors, (1001), 4 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:19,726 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:19:19,726 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1] [2022-12-13 18:19:19,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-13 18:19:19,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:19:19,928 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:19:19,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:19:19,929 INFO L85 PathProgramCache]: Analyzing trace with hash 969866942, now seen corresponding path program 1 times [2022-12-13 18:19:19,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:19:19,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427859916] [2022-12-13 18:19:19,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:19:19,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:19:19,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:19:19,933 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:19:19,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 18:19:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:19:20,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 18:19:20,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:19:20,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 18:19:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:19:20,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:19:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:19:22,017 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:19:22,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427859916] [2022-12-13 18:19:22,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427859916] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:19:22,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:19:22,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-12-13 18:19:22,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319584885] [2022-12-13 18:19:22,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:19:22,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 18:19:22,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:19:22,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 18:19:22,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:19:32,629 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 643 [2022-12-13 18:19:32,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 104 transitions, 666 flow. Second operand has 18 states, 18 states have (on average 230.05555555555554) internal successors, (4141), 18 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:32,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:19:32,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 643 [2022-12-13 18:19:32,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:19:37,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:19:39,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:19:41,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:19:43,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:19:44,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:19:46,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:19:48,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:19:52,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:19:54,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:19:55,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:19:57,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:19:59,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:20:01,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:20:03,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:20:17,154 INFO L130 PetriNetUnfolder]: 35791/50321 cut-off events. [2022-12-13 18:20:17,154 INFO L131 PetriNetUnfolder]: For 23831/23831 co-relation queries the response was YES. [2022-12-13 18:20:17,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141127 conditions, 50321 events. 35791/50321 cut-off events. For 23831/23831 co-relation queries the response was YES. Maximal size of possible extension queue 1679. Compared 310393 event pairs, 28127 based on Foata normal form. 9/28814 useless extension candidates. Maximal degree in co-relation 141089. Up to 10033 conditions per place. [2022-12-13 18:20:17,488 INFO L137 encePairwiseOnDemand]: 634/643 looper letters, 470 selfloop transitions, 65 changer transitions 0/535 dead transitions. [2022-12-13 18:20:17,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 535 transitions, 3532 flow [2022-12-13 18:20:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 18:20:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 18:20:17,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4589 transitions. [2022-12-13 18:20:17,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3964921375496803 [2022-12-13 18:20:17,496 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4589 transitions. [2022-12-13 18:20:17,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4589 transitions. [2022-12-13 18:20:17,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:17,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4589 transitions. [2022-12-13 18:20:17,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 254.94444444444446) internal successors, (4589), 18 states have internal predecessors, (4589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:17,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 643.0) internal successors, (12217), 19 states have internal predecessors, (12217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:17,513 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 643.0) internal successors, (12217), 19 states have internal predecessors, (12217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:17,513 INFO L175 Difference]: Start difference. First operand has 89 places, 104 transitions, 666 flow. Second operand 18 states and 4589 transitions. [2022-12-13 18:20:17,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 535 transitions, 3532 flow [2022-12-13 18:20:17,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 535 transitions, 3478 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-13 18:20:17,538 INFO L231 Difference]: Finished difference. Result has 113 places, 118 transitions, 954 flow [2022-12-13 18:20:17,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=954, PETRI_PLACES=113, PETRI_TRANSITIONS=118} [2022-12-13 18:20:17,538 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 49 predicate places. [2022-12-13 18:20:17,538 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 118 transitions, 954 flow [2022-12-13 18:20:17,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 230.05555555555554) internal successors, (4141), 18 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:17,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:17,539 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:20:17,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 18:20:17,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:20:17,740 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:20:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:17,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1416819388, now seen corresponding path program 1 times [2022-12-13 18:20:17,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:20:17,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36726688] [2022-12-13 18:20:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:17,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:20:17,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:20:17,741 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:20:17,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 18:20:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:17,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:20:17,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:17,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:20:17,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:20:17,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36726688] [2022-12-13 18:20:17,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36726688] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:20:17,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:20:17,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:20:17,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707612554] [2022-12-13 18:20:17,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:20:17,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:20:17,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:20:17,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:20:17,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:20:17,999 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 643 [2022-12-13 18:20:17,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 118 transitions, 954 flow. Second operand has 4 states, 4 states have (on average 244.5) internal successors, (978), 4 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:17,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:17,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 643 [2022-12-13 18:20:17,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:28,961 INFO L130 PetriNetUnfolder]: 48250/68146 cut-off events. [2022-12-13 18:20:28,961 INFO L131 PetriNetUnfolder]: For 31896/31896 co-relation queries the response was YES. [2022-12-13 18:20:29,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187907 conditions, 68146 events. 48250/68146 cut-off events. For 31896/31896 co-relation queries the response was YES. Maximal size of possible extension queue 2006. Compared 443773 event pairs, 37070 based on Foata normal form. 704/39986 useless extension candidates. Maximal degree in co-relation 187860. Up to 50320 conditions per place. [2022-12-13 18:20:29,685 INFO L137 encePairwiseOnDemand]: 632/643 looper letters, 199 selfloop transitions, 3 changer transitions 0/202 dead transitions. [2022-12-13 18:20:29,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 202 transitions, 2006 flow [2022-12-13 18:20:29,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:20:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:20:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1054 transitions. [2022-12-13 18:20:29,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4097978227060653 [2022-12-13 18:20:29,688 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1054 transitions. [2022-12-13 18:20:29,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1054 transitions. [2022-12-13 18:20:29,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:29,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1054 transitions. [2022-12-13 18:20:29,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.5) internal successors, (1054), 4 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:29,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 643.0) internal successors, (3215), 5 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:29,692 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 643.0) internal successors, (3215), 5 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:29,692 INFO L175 Difference]: Start difference. First operand has 113 places, 118 transitions, 954 flow. Second operand 4 states and 1054 transitions. [2022-12-13 18:20:29,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 202 transitions, 2006 flow [2022-12-13 18:20:29,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 202 transitions, 1786 flow, removed 34 selfloop flow, removed 9 redundant places. [2022-12-13 18:20:29,726 INFO L231 Difference]: Finished difference. Result has 108 places, 118 transitions, 853 flow [2022-12-13 18:20:29,726 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=853, PETRI_PLACES=108, PETRI_TRANSITIONS=118} [2022-12-13 18:20:29,726 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 44 predicate places. [2022-12-13 18:20:29,726 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 118 transitions, 853 flow [2022-12-13 18:20:29,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 244.5) internal successors, (978), 4 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:29,727 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:29,727 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:20:29,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 18:20:29,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:20:29,928 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:20:29,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:29,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1416819352, now seen corresponding path program 1 times [2022-12-13 18:20:29,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:20:29,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704815117] [2022-12-13 18:20:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:29,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:20:29,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:20:29,934 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:20:29,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 18:20:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:30,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 18:20:30,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:30,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:20:30,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:20:30,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704815117] [2022-12-13 18:20:30,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704815117] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:20:30,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:20:30,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:20:30,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901570158] [2022-12-13 18:20:30,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:20:30,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:20:30,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:20:30,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:20:30,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:20:30,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 643 [2022-12-13 18:20:30,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 118 transitions, 853 flow. Second operand has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:30,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:30,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 643 [2022-12-13 18:20:30,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:41,155 INFO L130 PetriNetUnfolder]: 47370/66650 cut-off events. [2022-12-13 18:20:41,155 INFO L131 PetriNetUnfolder]: For 39579/39579 co-relation queries the response was YES. [2022-12-13 18:20:41,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197211 conditions, 66650 events. 47370/66650 cut-off events. For 39579/39579 co-relation queries the response was YES. Maximal size of possible extension queue 2034. Compared 435101 event pairs, 20702 based on Foata normal form. 0/42230 useless extension candidates. Maximal degree in co-relation 197162. Up to 48137 conditions per place. [2022-12-13 18:20:41,748 INFO L137 encePairwiseOnDemand]: 637/643 looper letters, 146 selfloop transitions, 4 changer transitions 0/150 dead transitions. [2022-12-13 18:20:41,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 150 transitions, 1308 flow [2022-12-13 18:20:41,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:20:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:20:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 829 transitions. [2022-12-13 18:20:41,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4297563504406428 [2022-12-13 18:20:41,750 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 829 transitions. [2022-12-13 18:20:41,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 829 transitions. [2022-12-13 18:20:41,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:41,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 829 transitions. [2022-12-13 18:20:41,752 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) [2022-12-13 18:20:41,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:41,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:41,753 INFO L175 Difference]: Start difference. First operand has 108 places, 118 transitions, 853 flow. Second operand 3 states and 829 transitions. [2022-12-13 18:20:41,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 150 transitions, 1308 flow [2022-12-13 18:20:41,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 150 transitions, 1302 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 18:20:41,801 INFO L231 Difference]: Finished difference. Result has 111 places, 120 transitions, 879 flow [2022-12-13 18:20:41,801 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=879, PETRI_PLACES=111, PETRI_TRANSITIONS=120} [2022-12-13 18:20:41,801 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 47 predicate places. [2022-12-13 18:20:41,801 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 120 transitions, 879 flow [2022-12-13 18:20:41,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:41,801 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:41,802 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:20:41,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 18:20:42,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:20:42,003 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:20:42,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:42,004 INFO L85 PathProgramCache]: Analyzing trace with hash -971724521, now seen corresponding path program 1 times [2022-12-13 18:20:42,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:20:42,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311805071] [2022-12-13 18:20:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:42,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:20:42,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:20:42,009 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:20:42,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 18:20:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:42,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:20:42,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:42,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:20:42,242 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:20:42,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311805071] [2022-12-13 18:20:42,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311805071] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:20:42,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:20:42,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:20:42,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219181360] [2022-12-13 18:20:42,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:20:42,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:20:42,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:20:42,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:20:42,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:20:42,361 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 643 [2022-12-13 18:20:42,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 120 transitions, 879 flow. Second operand has 4 states, 4 states have (on average 242.75) internal successors, (971), 4 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:42,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:42,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 643 [2022-12-13 18:20:42,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:50,575 INFO L130 PetriNetUnfolder]: 35776/50502 cut-off events. [2022-12-13 18:20:50,575 INFO L131 PetriNetUnfolder]: For 39526/39526 co-relation queries the response was YES. [2022-12-13 18:20:50,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166697 conditions, 50502 events. 35776/50502 cut-off events. For 39526/39526 co-relation queries the response was YES. Maximal size of possible extension queue 1579. Compared 315014 event pairs, 28094 based on Foata normal form. 154/34046 useless extension candidates. Maximal degree in co-relation 166645. Up to 49572 conditions per place. [2022-12-13 18:20:50,989 INFO L137 encePairwiseOnDemand]: 639/643 looper letters, 185 selfloop transitions, 3 changer transitions 0/188 dead transitions. [2022-12-13 18:20:50,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 188 transitions, 1734 flow [2022-12-13 18:20:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:20:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:20:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1028 transitions. [2022-12-13 18:20:50,992 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39968895800933124 [2022-12-13 18:20:50,992 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1028 transitions. [2022-12-13 18:20:50,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1028 transitions. [2022-12-13 18:20:50,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:50,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1028 transitions. [2022-12-13 18:20:50,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:50,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 643.0) internal successors, (3215), 5 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:50,995 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 643.0) internal successors, (3215), 5 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:50,995 INFO L175 Difference]: Start difference. First operand has 111 places, 120 transitions, 879 flow. Second operand 4 states and 1028 transitions. [2022-12-13 18:20:50,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 188 transitions, 1734 flow [2022-12-13 18:20:51,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 188 transitions, 1726 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:20:51,073 INFO L231 Difference]: Finished difference. Result has 113 places, 120 transitions, 880 flow [2022-12-13 18:20:51,073 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=880, PETRI_PLACES=113, PETRI_TRANSITIONS=120} [2022-12-13 18:20:51,073 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 49 predicate places. [2022-12-13 18:20:51,073 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 120 transitions, 880 flow [2022-12-13 18:20:51,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 242.75) internal successors, (971), 4 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:51,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:51,074 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:20:51,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 18:20:51,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:20:51,275 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:20:51,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:51,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1410091724, now seen corresponding path program 1 times [2022-12-13 18:20:51,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:20:51,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790478933] [2022-12-13 18:20:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:51,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:20:51,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:20:51,281 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:20:51,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 18:20:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:51,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 18:20:51,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:51,581 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:20:51,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:20:51,685 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:20:51,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:20:51,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:20:51,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:20:51,806 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 18:20:51,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 18:20:51,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:20:51,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:20:51,842 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:20:51,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:20:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:51,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:56,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:20:56,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790478933] [2022-12-13 18:20:56,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790478933] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:56,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:20:56,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 18:20:56,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816729510] [2022-12-13 18:20:56,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:56,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 18:20:56,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:20:56,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 18:20:56,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:20:58,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:00,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:02,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:06,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:08,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:11,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:14,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:16,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:19,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:21,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:24,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:26,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:28,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:32,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:35,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:37,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:39,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:42,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:44,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:44,124 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 643 [2022-12-13 18:21:44,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 120 transitions, 880 flow. Second operand has 10 states, 10 states have (on average 200.2) internal successors, (2002), 10 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:44,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:21:44,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 643 [2022-12-13 18:21:44,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:21:51,206 WARN L233 SmtUtils]: Spent 6.85s on a formula simplification. DAG size of input: 78 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:21:53,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:22:03,099 WARN L233 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:22:12,970 WARN L233 SmtUtils]: Spent 8.78s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:22:14,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:22:19,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:22:36,134 WARN L233 SmtUtils]: Spent 16.63s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:22:46,999 WARN L233 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:23:03,215 INFO L130 PetriNetUnfolder]: 59814/84656 cut-off events. [2022-12-13 18:23:03,215 INFO L131 PetriNetUnfolder]: For 70078/70078 co-relation queries the response was YES. [2022-12-13 18:23:03,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260514 conditions, 84656 events. 59814/84656 cut-off events. For 70078/70078 co-relation queries the response was YES. Maximal size of possible extension queue 2325. Compared 559074 event pairs, 45100 based on Foata normal form. 5192/64306 useless extension candidates. Maximal degree in co-relation 260461. Up to 49501 conditions per place. [2022-12-13 18:23:04,012 INFO L137 encePairwiseOnDemand]: 625/643 looper letters, 269 selfloop transitions, 54 changer transitions 0/323 dead transitions. [2022-12-13 18:23:04,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 323 transitions, 2797 flow [2022-12-13 18:23:04,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 18:23:04,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 18:23:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3146 transitions. [2022-12-13 18:23:04,019 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3261793675479523 [2022-12-13 18:23:04,019 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3146 transitions. [2022-12-13 18:23:04,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3146 transitions. [2022-12-13 18:23:04,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:23:04,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3146 transitions. [2022-12-13 18:23:04,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 209.73333333333332) internal successors, (3146), 15 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:23:04,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 643.0) internal successors, (10288), 16 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:23:04,030 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 643.0) internal successors, (10288), 16 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:23:04,030 INFO L175 Difference]: Start difference. First operand has 113 places, 120 transitions, 880 flow. Second operand 15 states and 3146 transitions. [2022-12-13 18:23:04,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 323 transitions, 2797 flow [2022-12-13 18:23:04,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 323 transitions, 2792 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:23:04,150 INFO L231 Difference]: Finished difference. Result has 131 places, 158 transitions, 1549 flow [2022-12-13 18:23:04,150 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1549, PETRI_PLACES=131, PETRI_TRANSITIONS=158} [2022-12-13 18:23:04,151 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 67 predicate places. [2022-12-13 18:23:04,151 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 158 transitions, 1549 flow [2022-12-13 18:23:04,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 200.2) internal successors, (2002), 10 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:23:04,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:23:04,151 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:23:04,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-13 18:23:04,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:23:04,353 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:23:04,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:23:04,354 INFO L85 PathProgramCache]: Analyzing trace with hash 763174062, now seen corresponding path program 1 times [2022-12-13 18:23:04,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:23:04,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575639851] [2022-12-13 18:23:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:23:04,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:23:04,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:23:04,359 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:23:04,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 18:23:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:23:04,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:23:04,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:23:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:23:04,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:23:05,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:05,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 410 treesize of output 587 [2022-12-13 18:23:05,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:05,551 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 270 treesize of output 277 [2022-12-13 18:23:05,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:05,625 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 266 treesize of output 271 [2022-12-13 18:23:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:23:08,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:23:08,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575639851] [2022-12-13 18:23:08,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575639851] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 18:23:08,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:23:08,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2022-12-13 18:23:08,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420246518] [2022-12-13 18:23:08,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:23:08,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:23:08,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:23:08,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:23:08,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:23:08,342 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 643 [2022-12-13 18:23:08,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 158 transitions, 1549 flow. Second operand has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:23:08,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:23:08,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 643 [2022-12-13 18:23:08,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:23:23,269 INFO L130 PetriNetUnfolder]: 57878/81620 cut-off events. [2022-12-13 18:23:23,269 INFO L131 PetriNetUnfolder]: For 94798/94798 co-relation queries the response was YES. [2022-12-13 18:23:23,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288645 conditions, 81620 events. 57878/81620 cut-off events. For 94798/94798 co-relation queries the response was YES. Maximal size of possible extension queue 2491. Compared 533686 event pairs, 24156 based on Foata normal form. 550/57266 useless extension candidates. Maximal degree in co-relation 288586. Up to 72557 conditions per place. [2022-12-13 18:23:24,150 INFO L137 encePairwiseOnDemand]: 639/643 looper letters, 169 selfloop transitions, 2 changer transitions 0/171 dead transitions. [2022-12-13 18:23:24,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 171 transitions, 1942 flow [2022-12-13 18:23:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:23:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:23:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 803 transitions. [2022-12-13 18:23:24,153 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41627786417833074 [2022-12-13 18:23:24,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 803 transitions. [2022-12-13 18:23:24,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 803 transitions. [2022-12-13 18:23:24,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:23:24,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 803 transitions. [2022-12-13 18:23:24,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:23:24,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:23:24,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 643.0) internal successors, (2572), 4 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:23:24,156 INFO L175 Difference]: Start difference. First operand has 131 places, 158 transitions, 1549 flow. Second operand 3 states and 803 transitions. [2022-12-13 18:23:24,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 171 transitions, 1942 flow [2022-12-13 18:23:24,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 171 transitions, 1921 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 18:23:24,388 INFO L231 Difference]: Finished difference. Result has 133 places, 158 transitions, 1538 flow [2022-12-13 18:23:24,388 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1538, PETRI_PLACES=133, PETRI_TRANSITIONS=158} [2022-12-13 18:23:24,389 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 69 predicate places. [2022-12-13 18:23:24,389 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 158 transitions, 1538 flow [2022-12-13 18:23:24,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:23:24,389 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:23:24,389 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 18:23:24,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-12-13 18:23:24,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:23:24,590 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:23:24,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:23:24,592 INFO L85 PathProgramCache]: Analyzing trace with hash 217906954, now seen corresponding path program 3 times [2022-12-13 18:23:24,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:23:24,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010163646] [2022-12-13 18:23:24,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:23:24,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:23:24,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:23:24,596 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:23:24,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 18:23:24,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 18:23:24,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:23:24,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 18:23:24,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:23:24,932 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:23:24,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:23:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:23:25,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:23:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:23:28,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:23:28,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010163646] [2022-12-13 18:23:28,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010163646] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:23:28,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:23:28,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 18:23:28,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881270156] [2022-12-13 18:23:28,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:23:28,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 18:23:28,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:23:28,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 18:23:28,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 18:23:52,654 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 643 [2022-12-13 18:23:52,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 158 transitions, 1538 flow. Second operand has 24 states, 24 states have (on average 230.0) internal successors, (5520), 24 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:23:52,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:23:52,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 643 [2022-12-13 18:23:52,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:24:03,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:05,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:07,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:09,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:11,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:13,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:15,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:17,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:19,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:21,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:25,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:27,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:29,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:31,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:33,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:35,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:37,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:39,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:41,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:24:43,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:25:16,149 INFO L130 PetriNetUnfolder]: 68398/96452 cut-off events. [2022-12-13 18:25:16,149 INFO L131 PetriNetUnfolder]: For 110978/110978 co-relation queries the response was YES. [2022-12-13 18:25:16,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351148 conditions, 96452 events. 68398/96452 cut-off events. For 110978/110978 co-relation queries the response was YES. Maximal size of possible extension queue 2548. Compared 639355 event pairs, 51012 based on Foata normal form. 20/67040 useless extension candidates. Maximal degree in co-relation 351087. Up to 17577 conditions per place. [2022-12-13 18:25:17,190 INFO L137 encePairwiseOnDemand]: 634/643 looper letters, 614 selfloop transitions, 111 changer transitions 0/725 dead transitions. [2022-12-13 18:25:17,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 725 transitions, 6884 flow [2022-12-13 18:25:17,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 18:25:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 18:25:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 6058 transitions. [2022-12-13 18:25:17,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3925609123898393 [2022-12-13 18:25:17,199 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 6058 transitions. [2022-12-13 18:25:17,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 6058 transitions. [2022-12-13 18:25:17,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:25:17,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 6058 transitions. [2022-12-13 18:25:17,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 252.41666666666666) internal successors, (6058), 24 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:17,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 643.0) internal successors, (16075), 25 states have internal predecessors, (16075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:17,217 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 643.0) internal successors, (16075), 25 states have internal predecessors, (16075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:17,218 INFO L175 Difference]: Start difference. First operand has 133 places, 158 transitions, 1538 flow. Second operand 24 states and 6058 transitions. [2022-12-13 18:25:17,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 725 transitions, 6884 flow [2022-12-13 18:25:17,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 725 transitions, 6856 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:25:17,923 INFO L231 Difference]: Finished difference. Result has 167 places, 187 transitions, 2131 flow [2022-12-13 18:25:17,923 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2131, PETRI_PLACES=167, PETRI_TRANSITIONS=187} [2022-12-13 18:25:17,923 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 103 predicate places. [2022-12-13 18:25:17,923 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 187 transitions, 2131 flow [2022-12-13 18:25:17,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 230.0) internal successors, (5520), 24 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:17,924 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:25:17,924 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:17,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-13 18:25:18,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:25:18,125 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:25:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:18,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2111404258, now seen corresponding path program 1 times [2022-12-13 18:25:18,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:25:18,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857422586] [2022-12-13 18:25:18,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:18,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:25:18,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:25:18,127 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:25:18,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 18:25:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:18,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 18:25:18,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:18,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 18:25:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:18,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:25:18,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:25:18,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857422586] [2022-12-13 18:25:18,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857422586] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:18,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:18,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:25:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319057837] [2022-12-13 18:25:18,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:18,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:25:18,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:25:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:25:18,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:25:18,641 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 643 [2022-12-13 18:25:18,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 187 transitions, 2131 flow. Second operand has 4 states, 4 states have (on average 242.25) internal successors, (969), 4 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:18,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:25:18,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 643 [2022-12-13 18:25:18,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:25:33,803 INFO L130 PetriNetUnfolder]: 51784/74534 cut-off events. [2022-12-13 18:25:33,803 INFO L131 PetriNetUnfolder]: For 90545/90545 co-relation queries the response was YES. [2022-12-13 18:25:34,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272243 conditions, 74534 events. 51784/74534 cut-off events. For 90545/90545 co-relation queries the response was YES. Maximal size of possible extension queue 2010. Compared 497451 event pairs, 39754 based on Foata normal form. 0/57218 useless extension candidates. Maximal degree in co-relation 272169. Up to 74286 conditions per place. [2022-12-13 18:25:34,766 INFO L137 encePairwiseOnDemand]: 639/643 looper letters, 163 selfloop transitions, 21 changer transitions 0/184 dead transitions. [2022-12-13 18:25:34,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 184 transitions, 2484 flow [2022-12-13 18:25:34,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:25:34,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:25:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1000 transitions. [2022-12-13 18:25:34,769 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38880248833592534 [2022-12-13 18:25:34,769 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1000 transitions. [2022-12-13 18:25:34,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1000 transitions. [2022-12-13 18:25:34,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:25:34,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1000 transitions. [2022-12-13 18:25:34,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:34,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 643.0) internal successors, (3215), 5 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:34,772 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 643.0) internal successors, (3215), 5 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:34,772 INFO L175 Difference]: Start difference. First operand has 167 places, 187 transitions, 2131 flow. Second operand 4 states and 1000 transitions. [2022-12-13 18:25:34,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 184 transitions, 2484 flow [2022-12-13 18:25:35,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 184 transitions, 2262 flow, removed 32 selfloop flow, removed 10 redundant places. [2022-12-13 18:25:35,048 INFO L231 Difference]: Finished difference. Result has 158 places, 184 transitions, 1936 flow [2022-12-13 18:25:35,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1936, PETRI_PLACES=158, PETRI_TRANSITIONS=184} [2022-12-13 18:25:35,048 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 94 predicate places. [2022-12-13 18:25:35,048 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 184 transitions, 1936 flow [2022-12-13 18:25:35,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 242.25) internal successors, (969), 4 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:35,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:25:35,049 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:35,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-13 18:25:35,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:25:35,250 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:25:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:35,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2111404257, now seen corresponding path program 1 times [2022-12-13 18:25:35,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:25:35,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952283198] [2022-12-13 18:25:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:35,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:25:35,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:25:35,255 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:25:35,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-13 18:25:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:35,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:25:35,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:35,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:25:35,544 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:25:35,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952283198] [2022-12-13 18:25:35,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952283198] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:35,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:35,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:25:35,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530979143] [2022-12-13 18:25:35,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:35,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:25:35,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:25:35,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:25:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:25:35,761 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 643 [2022-12-13 18:25:35,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 184 transitions, 1936 flow. Second operand has 4 states, 4 states have (on average 245.25) internal successors, (981), 4 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:35,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:25:35,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 643 [2022-12-13 18:25:35,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:25:51,275 INFO L130 PetriNetUnfolder]: 50702/73100 cut-off events. [2022-12-13 18:25:51,275 INFO L131 PetriNetUnfolder]: For 89604/89604 co-relation queries the response was YES. [2022-12-13 18:25:51,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266899 conditions, 73100 events. 50702/73100 cut-off events. For 89604/89604 co-relation queries the response was YES. Maximal size of possible extension queue 2015. Compared 491674 event pairs, 39016 based on Foata normal form. 376/56532 useless extension candidates. Maximal degree in co-relation 266824. Up to 68633 conditions per place. [2022-12-13 18:25:52,234 INFO L137 encePairwiseOnDemand]: 637/643 looper letters, 183 selfloop transitions, 40 changer transitions 0/223 dead transitions. [2022-12-13 18:25:52,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 223 transitions, 2655 flow [2022-12-13 18:25:52,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:25:52,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:25:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1286 transitions. [2022-12-13 18:25:52,239 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4 [2022-12-13 18:25:52,239 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1286 transitions. [2022-12-13 18:25:52,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1286 transitions. [2022-12-13 18:25:52,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:25:52,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1286 transitions. [2022-12-13 18:25:52,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 257.2) internal successors, (1286), 5 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:52,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 643.0) internal successors, (3858), 6 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:52,244 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 643.0) internal successors, (3858), 6 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:52,244 INFO L175 Difference]: Start difference. First operand has 158 places, 184 transitions, 1936 flow. Second operand 5 states and 1286 transitions. [2022-12-13 18:25:52,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 223 transitions, 2655 flow [2022-12-13 18:25:52,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 223 transitions, 2631 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:25:52,625 INFO L231 Difference]: Finished difference. Result has 162 places, 186 transitions, 2065 flow [2022-12-13 18:25:52,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=643, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2065, PETRI_PLACES=162, PETRI_TRANSITIONS=186} [2022-12-13 18:25:52,626 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 98 predicate places. [2022-12-13 18:25:52,626 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 186 transitions, 2065 flow [2022-12-13 18:25:52,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 245.25) internal successors, (981), 4 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:52,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:25:52,626 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:52,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 18:25:52,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:25:52,828 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 18:25:52,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:52,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2111404214, now seen corresponding path program 1 times [2022-12-13 18:25:52,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:25:52,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205411744] [2022-12-13 18:25:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:52,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:25:52,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:25:52,837 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:25:52,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640e7c6a-83b6-4a43-b0b5-876b8f5ac80b/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-13 18:25:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:53,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 18:25:53,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:53,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:26:10,210 WARN L233 SmtUtils]: Spent 14.48s on a formula simplification. DAG size of input: 402 DAG size of output: 354 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-13 18:26:10,212 INFO L321 Elim1Store]: treesize reduction 168, result has 90.7 percent of original size [2022-12-13 18:26:10,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 737 treesize of output 2166 [2022-12-13 18:26:10,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:26:10,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 526 treesize of output 544 [2022-12-13 18:26:11,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:26:11,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 514 treesize of output 526