./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/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_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/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_b0a24a7f-b57f-4581-a1e4-3a33d174d964/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 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d --- 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 17:58:14,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:58:14,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:58:14,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:58:14,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:58:14,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:58:14,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:58:14,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:58:14,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:58:14,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:58:14,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:58:14,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:58:14,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:58:14,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:58:14,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:58:14,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:58:14,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:58:14,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:58:14,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:58:14,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:58:14,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:58:14,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:58:14,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:58:14,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:58:14,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:58:14,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:58:14,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:58:14,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:58:14,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:58:14,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:58:14,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:58:14,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:58:14,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:58:14,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:58:14,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:58:14,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:58:14,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:58:14,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:58:14,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:58:14,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:58:14,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:58:14,401 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 17:58:14,428 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:58:14,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:58:14,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:58:14,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:58:14,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:58:14,439 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:58:14,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:58:14,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:58:14,440 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:58:14,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:58:14,441 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:58:14,441 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:58:14,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:58:14,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:58:14,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:58:14,441 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:58:14,442 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:58:14,442 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:58:14,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:58:14,442 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:58:14,442 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:58:14,443 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:58:14,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:58:14,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:58:14,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:58:14,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:58:14,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:58:14,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:58:14,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:58:14,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:58:14,444 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:58:14,444 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:58:14,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:58:14,445 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:58:14,445 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_b0a24a7f-b57f-4581-a1e4-3a33d174d964/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d [2022-12-13 17:58:14,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:58:14,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:58:14,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:58:14,664 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:58:14,664 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:58:14,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c [2022-12-13 17:58:17,192 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:58:17,370 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:58:17,370 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c [2022-12-13 17:58:17,377 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/data/a15fac825/34579c234ad145b8a12aae4b62097322/FLAGa4947ffd4 [2022-12-13 17:58:17,785 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/data/a15fac825/34579c234ad145b8a12aae4b62097322 [2022-12-13 17:58:17,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:58:17,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:58:17,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:58:17,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:58:17,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:58:17,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:58:17" (1/1) ... [2022-12-13 17:58:17,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1815bbd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:17, skipping insertion in model container [2022-12-13 17:58:17,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:58:17" (1/1) ... [2022-12-13 17:58:17,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:58:17,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:58:17,926 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:17,926 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:17,927 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:17,928 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:17,929 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:17,930 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:17,931 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:17,932 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:17,934 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:17,935 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:17,935 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:17,936 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:17,937 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:17,938 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:17,938 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:17,939 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:17,945 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_b0a24a7f-b57f-4581-a1e4-3a33d174d964/sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c[4085,4098] [2022-12-13 17:58:17,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:58:17,960 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 17:58:17,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@551ec549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:17, skipping insertion in model container [2022-12-13 17:58:17,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:58:17,961 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 17:58:17,962 INFO L158 Benchmark]: Toolchain (without parser) took 170.31ms. Allocated memory is still 132.1MB. Free memory was 98.7MB in the beginning and 87.5MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 17:58:17,963 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 132.1MB. Free memory was 100.8MB in the beginning and 100.6MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:58:17,963 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.03ms. Allocated memory is still 132.1MB. Free memory was 98.7MB in the beginning and 87.5MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 17:58:17,964 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 132.1MB. Free memory was 100.8MB in the beginning and 100.6MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 168.03ms. Allocated memory is still 132.1MB. Free memory was 98.7MB in the beginning and 87.5MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 165]: 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_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/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_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/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_b0a24a7f-b57f-4581-a1e4-3a33d174d964/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 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d --- 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 17:58:19,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:58:19,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:58:19,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:58:19,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:58:19,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:58:19,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:58:19,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:58:19,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:58:19,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:58:19,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:58:19,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:58:19,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:58:19,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:58:19,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:58:19,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:58:19,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:58:19,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:58:19,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:58:19,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:58:19,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:58:19,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:58:19,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:58:19,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:58:19,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:58:19,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:58:19,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:58:19,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:58:19,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:58:19,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:58:19,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:58:19,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:58:19,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:58:19,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:58:19,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:58:19,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:58:19,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:58:19,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:58:19,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:58:19,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:58:19,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:58:19,472 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 17:58:19,496 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:58:19,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:58:19,497 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:58:19,497 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:58:19,498 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:58:19,498 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:58:19,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:58:19,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:58:19,499 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:58:19,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:58:19,499 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:58:19,499 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:58:19,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:58:19,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:58:19,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:58:19,500 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:58:19,500 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:58:19,501 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:58:19,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:58:19,501 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:58:19,501 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 17:58:19,501 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 17:58:19,501 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:58:19,502 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:58:19,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:58:19,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:58:19,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:58:19,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:58:19,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:58:19,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:58:19,503 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 17:58:19,503 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 17:58:19,504 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:58:19,504 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:58:19,504 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:58:19,504 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 17:58:19,504 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:58:19,504 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_b0a24a7f-b57f-4581-a1e4-3a33d174d964/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fedede1a0cf545b0a275694256164e3eb4f49b22c80042adac647157728b27d [2022-12-13 17:58:19,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:58:19,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:58:19,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:58:19,773 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:58:19,773 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:58:19,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c [2022-12-13 17:58:22,475 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:58:22,606 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:58:22,607 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c [2022-12-13 17:58:22,612 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/data/708c65c2c/5ea4a1740ac141afba4cbf3338316cbf/FLAGdcdc6a858 [2022-12-13 17:58:22,624 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/data/708c65c2c/5ea4a1740ac141afba4cbf3338316cbf [2022-12-13 17:58:22,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:58:22,627 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:58:22,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:58:22,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:58:22,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:58:22,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:58:22" (1/1) ... [2022-12-13 17:58:22,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@385726f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:22, skipping insertion in model container [2022-12-13 17:58:22,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:58:22" (1/1) ... [2022-12-13 17:58:22,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:58:22,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:58:22,777 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,778 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,779 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,780 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,780 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,781 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,783 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,784 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,785 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,786 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,786 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,787 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,789 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,791 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,791 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,793 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,799 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_b0a24a7f-b57f-4581-a1e4-3a33d174d964/sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c[4085,4098] [2022-12-13 17:58:22,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:58:22,816 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 17:58:22,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:58:22,823 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,823 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,824 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,824 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,824 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,825 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,826 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,826 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,827 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,828 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,828 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,829 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,830 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,831 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,831 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,832 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,835 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_b0a24a7f-b57f-4581-a1e4-3a33d174d964/sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c[4085,4098] [2022-12-13 17:58:22,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:58:22,843 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:58:22,856 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,857 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,858 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,858 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,858 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,859 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,859 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,860 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,861 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,861 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,862 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,862 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,863 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,864 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,864 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:58:22,865 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:58:22,869 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_b0a24a7f-b57f-4581-a1e4-3a33d174d964/sv-benchmarks/c/weaver/popl20-bad-ring-nondet.wvr.c[4085,4098] [2022-12-13 17:58:22,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:58:22,882 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:58:22,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:22 WrapperNode [2022-12-13 17:58:22,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:58:22,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:58:22,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:58:22,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:58:22,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:22" (1/1) ... [2022-12-13 17:58:22,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:22" (1/1) ... [2022-12-13 17:58:22,919 INFO L138 Inliner]: procedures = 27, calls = 63, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 307 [2022-12-13 17:58:22,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:58:22,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:58:22,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:58:22,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:58:22,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:22" (1/1) ... [2022-12-13 17:58:22,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:22" (1/1) ... [2022-12-13 17:58:22,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:22" (1/1) ... [2022-12-13 17:58:22,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:22" (1/1) ... [2022-12-13 17:58:22,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:22" (1/1) ... [2022-12-13 17:58:22,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:22" (1/1) ... [2022-12-13 17:58:22,942 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:22" (1/1) ... [2022-12-13 17:58:22,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:22" (1/1) ... [2022-12-13 17:58:22,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:58:22,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:58:22,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:58:22,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:58:22,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:22" (1/1) ... [2022-12-13 17:58:22,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:58:22,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:58:22,973 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:58:22,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:58:23,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:58:23,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 17:58:23,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:58:23,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 17:58:23,009 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 17:58:23,009 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 17:58:23,009 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 17:58:23,009 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 17:58:23,009 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 17:58:23,009 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 17:58:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 17:58:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 17:58:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 17:58:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:58:23,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:58:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:58:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 17:58:23,012 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 17:58:23,113 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:58:23,115 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:58:23,732 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:58:23,888 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:58:23,888 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 17:58:23,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:58:23 BoogieIcfgContainer [2022-12-13 17:58:23,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:58:23,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:58:23,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:58:23,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:58:23,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:58:22" (1/3) ... [2022-12-13 17:58:23,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a63c00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:58:23, skipping insertion in model container [2022-12-13 17:58:23,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:58:22" (2/3) ... [2022-12-13 17:58:23,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a63c00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:58:23, skipping insertion in model container [2022-12-13 17:58:23,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:58:23" (3/3) ... [2022-12-13 17:58:23,899 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring-nondet.wvr.c [2022-12-13 17:58:23,916 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:58:23,916 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-12-13 17:58:23,916 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:58:23,990 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 17:58:24,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 305 transitions, 634 flow [2022-12-13 17:58:24,140 INFO L130 PetriNetUnfolder]: 25/302 cut-off events. [2022-12-13 17:58:24,141 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 17:58:24,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 302 events. 25/302 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 364 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 249. Up to 4 conditions per place. [2022-12-13 17:58:24,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 305 transitions, 634 flow [2022-12-13 17:58:24,153 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 282 places, 297 transitions, 612 flow [2022-12-13 17:58:24,157 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:58:24,167 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 282 places, 297 transitions, 612 flow [2022-12-13 17:58:24,169 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 282 places, 297 transitions, 612 flow [2022-12-13 17:58:24,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 297 transitions, 612 flow [2022-12-13 17:58:24,226 INFO L130 PetriNetUnfolder]: 25/297 cut-off events. [2022-12-13 17:58:24,226 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 17:58:24,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 297 events. 25/297 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 368 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 249. Up to 4 conditions per place. [2022-12-13 17:58:24,230 INFO L119 LiptonReduction]: Number of co-enabled transitions 5066 [2022-12-13 17:58:55,670 INFO L134 LiptonReduction]: Checked pairs total: 12722 [2022-12-13 17:58:55,670 INFO L136 LiptonReduction]: Total number of compositions: 325 [2022-12-13 17:58:55,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:58:55,690 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;@53182f1e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:58:55,690 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2022-12-13 17:58:55,692 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 17:58:55,693 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:58:55,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:58:55,693 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:58:55,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 17:58:55,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:58:55,698 INFO L85 PathProgramCache]: Analyzing trace with hash 44152, now seen corresponding path program 1 times [2022-12-13 17:58:55,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:58:55,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093627228] [2022-12-13 17:58:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:58:55,709 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 17:58:55,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:58:55,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:58:55,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:58:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:58:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:58:55,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:58:55,944 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 17:58:55,945 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 17:58:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:58:55,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:58:55,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:58:55,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093627228] [2022-12-13 17:58:55,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093627228] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:58:55,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:58:55,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:58:55,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019024679] [2022-12-13 17:58:55,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:58:55,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:58:55,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:58:55,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:58:56,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:58:56,137 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 630 [2022-12-13 17:58:56,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:56,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:58:56,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 630 [2022-12-13 17:58:56,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:58:58,081 INFO L130 PetriNetUnfolder]: 10396/14199 cut-off events. [2022-12-13 17:58:58,081 INFO L131 PetriNetUnfolder]: For 251/251 co-relation queries the response was YES. [2022-12-13 17:58:58,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28694 conditions, 14199 events. 10396/14199 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 73530 event pairs, 8633 based on Foata normal form. 0/5247 useless extension candidates. Maximal degree in co-relation 26920. Up to 14199 conditions per place. [2022-12-13 17:58:58,154 INFO L137 encePairwiseOnDemand]: 623/630 looper letters, 63 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2022-12-13 17:58:58,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 274 flow [2022-12-13 17:58:58,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:58:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:58:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 811 transitions. [2022-12-13 17:58:58,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4291005291005291 [2022-12-13 17:58:58,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 811 transitions. [2022-12-13 17:58:58,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 811 transitions. [2022-12-13 17:58:58,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:58:58,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 811 transitions. [2022-12-13 17:58:58,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:58,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:58,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:58,183 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 158 flow. Second operand 3 states and 811 transitions. [2022-12-13 17:58:58,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 274 flow [2022-12-13 17:58:58,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 17:58:58,197 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 136 flow [2022-12-13 17:58:58,198 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2022-12-13 17:58:58,201 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, -8 predicate places. [2022-12-13 17:58:58,201 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 136 flow [2022-12-13 17:58:58,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:58,201 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:58:58,202 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:58:58,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:58:58,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:58:58,404 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 17:58:58,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:58:58,406 INFO L85 PathProgramCache]: Analyzing trace with hash 44153, now seen corresponding path program 1 times [2022-12-13 17:58:58,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:58:58,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535834337] [2022-12-13 17:58:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:58:58,410 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 17:58:58,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:58:58,413 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:58:58,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:58:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:58:58,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:58:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:58:58,650 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 17:58:58,651 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 17:58:58,676 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 17:58:58,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:58:58,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:58:58,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535834337] [2022-12-13 17:58:58,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535834337] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:58:58,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:58:58,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:58:58,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110795674] [2022-12-13 17:58:58,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:58:58,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:58:58,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:58:58,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:58:58,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:58:58,899 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 630 [2022-12-13 17:58:58,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:58,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:58:58,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 630 [2022-12-13 17:58:58,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:59:02,680 INFO L130 PetriNetUnfolder]: 20791/28394 cut-off events. [2022-12-13 17:59:02,681 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-12-13 17:59:02,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57010 conditions, 28394 events. 20791/28394 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 1654. Compared 160006 event pairs, 17266 based on Foata normal form. 0/10493 useless extension candidates. Maximal degree in co-relation 57004. Up to 14200 conditions per place. [2022-12-13 17:59:02,813 INFO L137 encePairwiseOnDemand]: 621/630 looper letters, 118 selfloop transitions, 6 changer transitions 0/124 dead transitions. [2022-12-13 17:59:02,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 124 transitions, 510 flow [2022-12-13 17:59:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:59:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:59:02,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 868 transitions. [2022-12-13 17:59:02,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2022-12-13 17:59:02,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 868 transitions. [2022-12-13 17:59:02,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 868 transitions. [2022-12-13 17:59:02,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:59:02,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 868 transitions. [2022-12-13 17:59:02,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:02,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:02,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:02,829 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 136 flow. Second operand 3 states and 868 transitions. [2022-12-13 17:59:02,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 124 transitions, 510 flow [2022-12-13 17:59:02,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 124 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:59:02,833 INFO L231 Difference]: Finished difference. Result has 65 places, 69 transitions, 185 flow [2022-12-13 17:59:02,833 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=65, PETRI_TRANSITIONS=69} [2022-12-13 17:59:02,834 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, -5 predicate places. [2022-12-13 17:59:02,834 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 185 flow [2022-12-13 17:59:02,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:02,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:59:02,836 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 17:59:02,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:03,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:03,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 17:59:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:59:03,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1374363, now seen corresponding path program 1 times [2022-12-13 17:59:03,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:59:03,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860151221] [2022-12-13 17:59:03,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:59:03,043 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 17:59:03,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:59:03,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:03,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:59:03,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 17:59:03,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:59:03,258 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 17:59:03,258 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 17:59:03,315 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 17:59:03,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:59:03,514 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 17:59:03,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:59:03,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860151221] [2022-12-13 17:59:03,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860151221] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:59:03,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:59:03,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 17:59:03,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887372018] [2022-12-13 17:59:03,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:59:03,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:59:03,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:59:03,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:59:03,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:59:04,506 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 630 [2022-12-13 17:59:04,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 69 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:04,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:59:04,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 630 [2022-12-13 17:59:04,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:59:10,764 INFO L130 PetriNetUnfolder]: 31196/42605 cut-off events. [2022-12-13 17:59:10,765 INFO L131 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2022-12-13 17:59:10,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85583 conditions, 42605 events. 31196/42605 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 2298. Compared 251884 event pairs, 25899 based on Foata normal form. 0/15760 useless extension candidates. Maximal degree in co-relation 85574. Up to 14201 conditions per place. [2022-12-13 17:59:10,914 INFO L137 encePairwiseOnDemand]: 618/630 looper letters, 173 selfloop transitions, 27 changer transitions 0/200 dead transitions. [2022-12-13 17:59:10,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 200 transitions, 901 flow [2022-12-13 17:59:10,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:59:10,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:59:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1601 transitions. [2022-12-13 17:59:10,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42354497354497356 [2022-12-13 17:59:10,919 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1601 transitions. [2022-12-13 17:59:10,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1601 transitions. [2022-12-13 17:59:10,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:59:10,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1601 transitions. [2022-12-13 17:59:10,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 266.8333333333333) internal successors, (1601), 6 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:10,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 630.0) internal successors, (4410), 7 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:10,941 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 630.0) internal successors, (4410), 7 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:10,941 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 185 flow. Second operand 6 states and 1601 transitions. [2022-12-13 17:59:10,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 200 transitions, 901 flow [2022-12-13 17:59:10,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 200 transitions, 877 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:59:10,947 INFO L231 Difference]: Finished difference. Result has 72 places, 90 transitions, 377 flow [2022-12-13 17:59:10,947 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=72, PETRI_TRANSITIONS=90} [2022-12-13 17:59:10,948 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2022-12-13 17:59:10,948 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 90 transitions, 377 flow [2022-12-13 17:59:10,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:10,950 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:59:10,950 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 17:59:10,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-12-13 17:59:11,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:11,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 17:59:11,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:59:11,153 INFO L85 PathProgramCache]: Analyzing trace with hash 42659765, now seen corresponding path program 1 times [2022-12-13 17:59:11,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:59:11,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380540172] [2022-12-13 17:59:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:59:11,155 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 17:59:11,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:59:11,157 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:11,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:59:11,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 17:59:11,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:59:11,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:59:11,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:59:11,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:59:11,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:59:11,327 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-13 17:59:11,328 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 17:59:11,357 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 17:59:11,358 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 17:59:11,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:59:11,401 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 17:59:11,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:59:11,428 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 17:59:11,455 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 17:59:11,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:59:11,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:59:11,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380540172] [2022-12-13 17:59:11,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380540172] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:59:11,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:59:11,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:59:11,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846360103] [2022-12-13 17:59:11,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:59:11,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:59:11,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:59:11,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:59:11,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:59:11,687 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 630 [2022-12-13 17:59:11,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 90 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:11,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:59:11,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 630 [2022-12-13 17:59:11,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:59:14,947 INFO L130 PetriNetUnfolder]: 23898/33000 cut-off events. [2022-12-13 17:59:14,947 INFO L131 PetriNetUnfolder]: For 152/152 co-relation queries the response was YES. [2022-12-13 17:59:14,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66435 conditions, 33000 events. 23898/33000 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 1933. Compared 194531 event pairs, 19755 based on Foata normal form. 0/13073 useless extension candidates. Maximal degree in co-relation 66422. Up to 33000 conditions per place. [2022-12-13 17:59:15,063 INFO L137 encePairwiseOnDemand]: 627/630 looper letters, 85 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2022-12-13 17:59:15,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 86 transitions, 529 flow [2022-12-13 17:59:15,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:59:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:59:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 826 transitions. [2022-12-13 17:59:15,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2022-12-13 17:59:15,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 826 transitions. [2022-12-13 17:59:15,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 826 transitions. [2022-12-13 17:59:15,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:59:15,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 826 transitions. [2022-12-13 17:59:15,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.3333333333333) internal successors, (826), 3 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:15,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:15,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:15,070 INFO L175 Difference]: Start difference. First operand has 72 places, 90 transitions, 377 flow. Second operand 3 states and 826 transitions. [2022-12-13 17:59:15,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 86 transitions, 529 flow [2022-12-13 17:59:15,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 86 transitions, 499 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 17:59:15,072 INFO L231 Difference]: Finished difference. Result has 71 places, 86 transitions, 329 flow [2022-12-13 17:59:15,072 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=329, PETRI_PLACES=71, PETRI_TRANSITIONS=86} [2022-12-13 17:59:15,073 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 1 predicate places. [2022-12-13 17:59:15,073 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 86 transitions, 329 flow [2022-12-13 17:59:15,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:15,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:59:15,074 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 17:59:15,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:15,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:15,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 17:59:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:59:15,277 INFO L85 PathProgramCache]: Analyzing trace with hash 42659763, now seen corresponding path program 1 times [2022-12-13 17:59:15,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:59:15,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976615692] [2022-12-13 17:59:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:59:15,280 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 17:59:15,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:59:15,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:15,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:59:15,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 17:59:15,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:59:15,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:59:15,530 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-13 17:59:15,530 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 17:59:15,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:59:15,747 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 17:59:15,747 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 17:59:15,997 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-12-13 17:59:15,997 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 55 treesize of output 80 [2022-12-13 17:59:18,450 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 17:59:18,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:59:18,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:59:18,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976615692] [2022-12-13 17:59:18,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976615692] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:59:18,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:59:18,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:59:18,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047194159] [2022-12-13 17:59:18,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:59:18,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:59:18,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:59:18,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:59:18,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-12-13 17:59:20,468 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 [0] [2022-12-13 17:59:22,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 17:59:24,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 17:59:26,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 17:59:28,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 17:59:30,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 17:59:34,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 17:59:36,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 17:59:38,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 17:59:38,318 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 630 [2022-12-13 17:59:38,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 86 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 221.8) internal successors, (1109), 5 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:38,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:59:38,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 630 [2022-12-13 17:59:38,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:59:40,850 INFO L130 PetriNetUnfolder]: 16600/23395 cut-off events. [2022-12-13 17:59:40,850 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-12-13 17:59:40,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47199 conditions, 23395 events. 16600/23395 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 1307. Compared 136230 event pairs, 13611 based on Foata normal form. 0/10385 useless extension candidates. Maximal degree in co-relation 47185. Up to 23395 conditions per place. [2022-12-13 17:59:40,922 INFO L137 encePairwiseOnDemand]: 627/630 looper letters, 81 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2022-12-13 17:59:40,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 82 transitions, 473 flow [2022-12-13 17:59:40,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:59:40,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:59:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 725 transitions. [2022-12-13 17:59:40,925 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2022-12-13 17:59:40,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 725 transitions. [2022-12-13 17:59:40,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 725 transitions. [2022-12-13 17:59:40,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:59:40,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 725 transitions. [2022-12-13 17:59:40,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 17:59:40,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:40,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:40,933 INFO L175 Difference]: Start difference. First operand has 71 places, 86 transitions, 329 flow. Second operand 3 states and 725 transitions. [2022-12-13 17:59:40,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 82 transitions, 473 flow [2022-12-13 17:59:40,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 82 transitions, 472 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:59:40,936 INFO L231 Difference]: Finished difference. Result has 70 places, 82 transitions, 310 flow [2022-12-13 17:59:40,936 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=70, PETRI_TRANSITIONS=82} [2022-12-13 17:59:40,937 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2022-12-13 17:59:40,937 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 310 flow [2022-12-13 17:59:40,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 221.8) internal successors, (1109), 5 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:40,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:59:40,938 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:59:40,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 17:59:41,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:41,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 17:59:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:59:41,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1953606723, now seen corresponding path program 1 times [2022-12-13 17:59:41,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:59:41,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842672930] [2022-12-13 17:59:41,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:59:41,141 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 17:59:41,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:59:41,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:41,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:59:41,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 17:59:41,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:59:41,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:59:41,359 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-13 17:59:41,359 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 17:59:41,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:59:41,526 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-12-13 17:59:41,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 17:59:41,654 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-13 17:59:41,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-12-13 17:59:41,763 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 17:59:41,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:59:41,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:59:41,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842672930] [2022-12-13 17:59:41,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842672930] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:59:41,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:59:41,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:59:41,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287395267] [2022-12-13 17:59:41,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:59:41,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:59:41,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:59:41,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:59:41,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:59:42,142 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 630 [2022-12-13 17:59:42,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 310 flow. Second operand has 4 states, 4 states have (on average 255.5) internal successors, (1022), 4 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:42,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:59:42,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 630 [2022-12-13 17:59:42,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:59:44,840 INFO L130 PetriNetUnfolder]: 16174/22741 cut-off events. [2022-12-13 17:59:44,840 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-12-13 17:59:44,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45892 conditions, 22741 events. 16174/22741 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 1283. Compared 131466 event pairs, 13242 based on Foata normal form. 0/10226 useless extension candidates. Maximal degree in co-relation 45877. Up to 22741 conditions per place. [2022-12-13 17:59:44,927 INFO L137 encePairwiseOnDemand]: 627/630 looper letters, 79 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2022-12-13 17:59:44,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 466 flow [2022-12-13 17:59:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:59:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:59:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 822 transitions. [2022-12-13 17:59:44,929 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43492063492063493 [2022-12-13 17:59:44,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 822 transitions. [2022-12-13 17:59:44,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 822 transitions. [2022-12-13 17:59:44,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:59:44,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 822 transitions. [2022-12-13 17:59:44,931 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 17:59:44,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:44,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:44,933 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 310 flow. Second operand 3 states and 822 transitions. [2022-12-13 17:59:44,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 466 flow [2022-12-13 17:59:44,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 80 transitions, 465 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:59:44,936 INFO L231 Difference]: Finished difference. Result has 69 places, 80 transitions, 307 flow [2022-12-13 17:59:44,936 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=307, PETRI_PLACES=69, PETRI_TRANSITIONS=80} [2022-12-13 17:59:44,937 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, -1 predicate places. [2022-12-13 17:59:44,937 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 80 transitions, 307 flow [2022-12-13 17:59:44,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 255.5) internal successors, (1022), 4 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:44,938 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:59:44,938 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:59:44,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:45,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:45,139 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 17:59:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:59:45,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1953606722, now seen corresponding path program 1 times [2022-12-13 17:59:45,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:59:45,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638776423] [2022-12-13 17:59:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:59:45,139 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 17:59:45,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:59:45,140 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:45,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:59:45,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:59:45,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:59:45,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:59:45,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:59:45,324 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-13 17:59:45,324 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 17:59:45,338 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 17:59:45,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:59:45,390 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 17:59:45,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:59:45,411 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 17:59:45,452 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 17:59:45,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:59:45,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:59:45,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638776423] [2022-12-13 17:59:45,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638776423] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:59:45,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:59:45,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:59:45,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489953893] [2022-12-13 17:59:45,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:59:45,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:59:45,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:59:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:59:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:59:45,680 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 630 [2022-12-13 17:59:45,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 80 transitions, 307 flow. Second operand has 4 states, 4 states have (on average 255.5) internal successors, (1022), 4 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:45,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:59:45,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 630 [2022-12-13 17:59:45,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:59:47,856 INFO L130 PetriNetUnfolder]: 15748/22087 cut-off events. [2022-12-13 17:59:47,856 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-12-13 17:59:47,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44585 conditions, 22087 events. 15748/22087 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 1261. Compared 127023 event pairs, 12873 based on Foata normal form. 0/10067 useless extension candidates. Maximal degree in co-relation 44569. Up to 22087 conditions per place. [2022-12-13 17:59:47,928 INFO L137 encePairwiseOnDemand]: 627/630 looper letters, 77 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2022-12-13 17:59:47,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 459 flow [2022-12-13 17:59:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:59:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:59:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 820 transitions. [2022-12-13 17:59:47,930 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2022-12-13 17:59:47,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 820 transitions. [2022-12-13 17:59:47,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 820 transitions. [2022-12-13 17:59:47,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:59:47,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 820 transitions. [2022-12-13 17:59:47,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:47,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:47,934 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:47,934 INFO L175 Difference]: Start difference. First operand has 69 places, 80 transitions, 307 flow. Second operand 3 states and 820 transitions. [2022-12-13 17:59:47,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 459 flow [2022-12-13 17:59:47,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 458 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:59:47,936 INFO L231 Difference]: Finished difference. Result has 68 places, 78 transitions, 304 flow [2022-12-13 17:59:47,936 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=66, 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=304, PETRI_PLACES=68, PETRI_TRANSITIONS=78} [2022-12-13 17:59:47,936 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, -2 predicate places. [2022-12-13 17:59:47,936 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 78 transitions, 304 flow [2022-12-13 17:59:47,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 255.5) internal successors, (1022), 4 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:47,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:59:47,937 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 17:59:47,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 17:59:48,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:48,138 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 17:59:48,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:59:48,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2000444167, now seen corresponding path program 2 times [2022-12-13 17:59:48,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:59:48,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697404849] [2022-12-13 17:59:48,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:59:48,141 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 17:59:48,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:59:48,144 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:48,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:59:48,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:59:48,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:59:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 17:59:48,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:59:48,358 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 17:59:48,359 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 17:59:48,478 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 17:59:48,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:59:49,011 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 17:59:49,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:59:49,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697404849] [2022-12-13 17:59:49,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697404849] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:59:49,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:59:49,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 17:59:49,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818031523] [2022-12-13 17:59:49,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:59:49,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:59:49,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:59:49,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:59:49,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:59:53,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 630 [2022-12-13 17:59:53,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 78 transitions, 304 flow. Second operand has 12 states, 12 states have (on average 236.0) internal successors, (2832), 12 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:53,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:59:53,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 630 [2022-12-13 17:59:53,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:59:56,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:59:58,710 WARN L539 Checker$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 17:59:59,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:00:01,406 WARN L539 Checker$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 18:00:04,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:00:06,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:00:08,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:00:10,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:00:12,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:00:15,145 WARN L539 Checker$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 18:00:26,510 INFO L130 PetriNetUnfolder]: 52472/73576 cut-off events. [2022-12-13 18:00:26,510 INFO L131 PetriNetUnfolder]: For 540/540 co-relation queries the response was YES. [2022-12-13 18:00:26,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148391 conditions, 73576 events. 52472/73576 cut-off events. For 540/540 co-relation queries the response was YES. Maximal size of possible extension queue 2033. Compared 465054 event pairs, 42910 based on Foata normal form. 16/33520 useless extension candidates. Maximal degree in co-relation 148374. Up to 7680 conditions per place. [2022-12-13 18:00:26,809 INFO L137 encePairwiseOnDemand]: 620/630 looper letters, 478 selfloop transitions, 48 changer transitions 0/526 dead transitions. [2022-12-13 18:00:26,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 526 transitions, 2442 flow [2022-12-13 18:00:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 18:00:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 18:00:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3597 transitions. [2022-12-13 18:00:26,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4391941391941392 [2022-12-13 18:00:26,816 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3597 transitions. [2022-12-13 18:00:26,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3597 transitions. [2022-12-13 18:00:26,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:00:26,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3597 transitions. [2022-12-13 18:00:26,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 276.6923076923077) internal successors, (3597), 13 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:26,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 630.0) internal successors, (8820), 14 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:26,831 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 630.0) internal successors, (8820), 14 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:26,831 INFO L175 Difference]: Start difference. First operand has 68 places, 78 transitions, 304 flow. Second operand 13 states and 3597 transitions. [2022-12-13 18:00:26,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 526 transitions, 2442 flow [2022-12-13 18:00:26,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 526 transitions, 2441 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:00:26,837 INFO L231 Difference]: Finished difference. Result has 87 places, 105 transitions, 651 flow [2022-12-13 18:00:26,837 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=651, PETRI_PLACES=87, PETRI_TRANSITIONS=105} [2022-12-13 18:00:26,838 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 17 predicate places. [2022-12-13 18:00:26,838 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 105 transitions, 651 flow [2022-12-13 18:00:26,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 236.0) internal successors, (2832), 12 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:26,839 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:00:26,839 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:00:26,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:27,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:27,041 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 18:00:27,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:00:27,042 INFO L85 PathProgramCache]: Analyzing trace with hash -432268055, now seen corresponding path program 1 times [2022-12-13 18:00:27,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:00:27,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819814793] [2022-12-13 18:00:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:00:27,044 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 18:00:27,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:00:27,047 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:27,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:00:27,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:00:27,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:00:27,240 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 18:00:27,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:00:27,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:00:27,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819814793] [2022-12-13 18:00:27,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819814793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:00:27,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:00:27,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:00:27,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471716451] [2022-12-13 18:00:27,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:00:27,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:00:27,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:00:27,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:00:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:00:27,380 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 630 [2022-12-13 18:00:27,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 105 transitions, 651 flow. Second operand has 4 states, 4 states have (on average 249.75) internal successors, (999), 4 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:27,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:00:27,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 630 [2022-12-13 18:00:27,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:00:35,308 INFO L130 PetriNetUnfolder]: 53632/75608 cut-off events. [2022-12-13 18:00:35,308 INFO L131 PetriNetUnfolder]: For 625/625 co-relation queries the response was YES. [2022-12-13 18:00:35,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152783 conditions, 75608 events. 53632/75608 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 2276. Compared 488625 event pairs, 43980 based on Foata normal form. 820/35885 useless extension candidates. Maximal degree in co-relation 152757. Up to 73575 conditions per place. [2022-12-13 18:00:35,687 INFO L137 encePairwiseOnDemand]: 616/630 looper letters, 154 selfloop transitions, 3 changer transitions 1/158 dead transitions. [2022-12-13 18:00:35,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 158 transitions, 1331 flow [2022-12-13 18:00:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:00:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:00:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1085 transitions. [2022-12-13 18:00:35,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2022-12-13 18:00:35,690 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1085 transitions. [2022-12-13 18:00:35,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1085 transitions. [2022-12-13 18:00:35,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:00:35,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1085 transitions. [2022-12-13 18:00:35,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 271.25) internal successors, (1085), 4 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:35,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 630.0) internal successors, (3150), 5 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:35,695 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 630.0) internal successors, (3150), 5 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:35,695 INFO L175 Difference]: Start difference. First operand has 87 places, 105 transitions, 651 flow. Second operand 4 states and 1085 transitions. [2022-12-13 18:00:35,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 158 transitions, 1331 flow [2022-12-13 18:00:35,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 158 transitions, 1184 flow, removed 35 selfloop flow, removed 4 redundant places. [2022-12-13 18:00:35,700 INFO L231 Difference]: Finished difference. Result has 87 places, 105 transitions, 589 flow [2022-12-13 18:00:35,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=589, PETRI_PLACES=87, PETRI_TRANSITIONS=105} [2022-12-13 18:00:35,700 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 17 predicate places. [2022-12-13 18:00:35,701 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 105 transitions, 589 flow [2022-12-13 18:00:35,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 249.75) internal successors, (999), 4 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:35,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:00:35,702 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:00:35,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 18:00:35,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:35,903 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 18:00:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:00:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -515320259, now seen corresponding path program 1 times [2022-12-13 18:00:35,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:00:35,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519823068] [2022-12-13 18:00:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:00:35,906 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 18:00:35,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:00:35,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:35,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:00:36,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:00:36,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:00:36,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:00:36,224 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-13 18:00:36,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-13 18:00:36,239 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 84 treesize of output 82 [2022-12-13 18:00:36,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:00:36,292 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 18:00:36,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:00:36,322 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 18:00:36,386 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 18:00:36,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:00:36,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:00:36,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519823068] [2022-12-13 18:00:36,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519823068] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:00:36,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:00:36,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:00:36,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780349233] [2022-12-13 18:00:36,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:00:36,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:00:36,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:00:36,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:00:36,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:00:36,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 630 [2022-12-13 18:00:36,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 105 transitions, 589 flow. Second operand has 5 states, 5 states have (on average 253.6) internal successors, (1268), 5 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:36,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:00:36,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 630 [2022-12-13 18:00:36,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:00:44,683 INFO L130 PetriNetUnfolder]: 51432/72328 cut-off events. [2022-12-13 18:00:44,683 INFO L131 PetriNetUnfolder]: For 4375/4375 co-relation queries the response was YES. [2022-12-13 18:00:44,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167575 conditions, 72328 events. 51432/72328 cut-off events. For 4375/4375 co-relation queries the response was YES. Maximal size of possible extension queue 2041. Compared 462503 event pairs, 42150 based on Foata normal form. 0/34238 useless extension candidates. Maximal degree in co-relation 167547. Up to 72328 conditions per place. [2022-12-13 18:00:45,062 INFO L137 encePairwiseOnDemand]: 627/630 looper letters, 102 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2022-12-13 18:00:45,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 103 transitions, 791 flow [2022-12-13 18:00:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:00:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:00:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 812 transitions. [2022-12-13 18:00:45,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42962962962962964 [2022-12-13 18:00:45,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 812 transitions. [2022-12-13 18:00:45,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 812 transitions. [2022-12-13 18:00:45,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:00:45,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 812 transitions. [2022-12-13 18:00:45,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:45,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:45,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:45,069 INFO L175 Difference]: Start difference. First operand has 87 places, 105 transitions, 589 flow. Second operand 3 states and 812 transitions. [2022-12-13 18:00:45,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 103 transitions, 791 flow [2022-12-13 18:00:45,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 103 transitions, 785 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 18:00:45,076 INFO L231 Difference]: Finished difference. Result has 86 places, 103 transitions, 581 flow [2022-12-13 18:00:45,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=581, PETRI_PLACES=86, PETRI_TRANSITIONS=103} [2022-12-13 18:00:45,076 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-12-13 18:00:45,076 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 103 transitions, 581 flow [2022-12-13 18:00:45,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.6) internal successors, (1268), 5 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:45,077 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:00:45,077 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:00:45,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:45,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:45,278 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 18:00:45,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:00:45,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1124329977, now seen corresponding path program 1 times [2022-12-13 18:00:45,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:00:45,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102907504] [2022-12-13 18:00:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:00:45,281 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 18:00:45,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:00:45,284 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:45,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:00:45,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:00:45,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:00:45,550 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:00:45,551 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 18:00:45,572 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 18:00:45,573 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 18:00:45,589 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 18:00:45,589 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 18:00:45,600 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 18:00:45,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:00:45,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:00:45,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102907504] [2022-12-13 18:00:45,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102907504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:00:45,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:00:45,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:00:45,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937804298] [2022-12-13 18:00:45,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:00:45,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:00:45,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:00:45,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:00:45,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:00:45,824 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 630 [2022-12-13 18:00:45,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 103 transitions, 581 flow. Second operand has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:45,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:00:45,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 630 [2022-12-13 18:00:45,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:00:52,128 INFO L130 PetriNetUnfolder]: 38732/54488 cut-off events. [2022-12-13 18:00:52,128 INFO L131 PetriNetUnfolder]: For 3687/3687 co-relation queries the response was YES. [2022-12-13 18:00:52,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123813 conditions, 54488 events. 38732/54488 cut-off events. For 3687/3687 co-relation queries the response was YES. Maximal size of possible extension queue 1546. Compared 335020 event pairs, 30940 based on Foata normal form. 0/27728 useless extension candidates. Maximal degree in co-relation 123784. Up to 54475 conditions per place. [2022-12-13 18:00:52,411 INFO L137 encePairwiseOnDemand]: 625/630 looper letters, 88 selfloop transitions, 12 changer transitions 0/100 dead transitions. [2022-12-13 18:00:52,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 100 transitions, 769 flow [2022-12-13 18:00:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:00:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:00:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1026 transitions. [2022-12-13 18:00:52,413 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2022-12-13 18:00:52,413 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1026 transitions. [2022-12-13 18:00:52,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1026 transitions. [2022-12-13 18:00:52,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:00:52,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1026 transitions. [2022-12-13 18:00:52,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 256.5) internal successors, (1026), 4 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:52,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 630.0) internal successors, (3150), 5 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:52,418 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 630.0) internal successors, (3150), 5 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:52,418 INFO L175 Difference]: Start difference. First operand has 86 places, 103 transitions, 581 flow. Second operand 4 states and 1026 transitions. [2022-12-13 18:00:52,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 100 transitions, 769 flow [2022-12-13 18:00:52,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 100 transitions, 768 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:00:52,423 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 592 flow [2022-12-13 18:00:52,423 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=592, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2022-12-13 18:00:52,423 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-12-13 18:00:52,424 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 592 flow [2022-12-13 18:00:52,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:52,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:00:52,424 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:00:52,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:52,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:52,626 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 18:00:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:00:52,627 INFO L85 PathProgramCache]: Analyzing trace with hash -515320258, now seen corresponding path program 1 times [2022-12-13 18:00:52,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:00:52,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897642380] [2022-12-13 18:00:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:00:52,628 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 18:00:52,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:00:52,631 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:52,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:00:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:00:52,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 18:00:52,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:00:52,852 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 18:00:52,853 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 18:00:52,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:00:52,890 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 18:00:52,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:00:52,916 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 18:00:52,983 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 18:00:52,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:00:52,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:00:52,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897642380] [2022-12-13 18:00:52,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897642380] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:00:52,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:00:52,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:00:52,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524686603] [2022-12-13 18:00:52,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:00:52,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:00:52,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:00:52,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:00:52,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:00:55,048 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 630 [2022-12-13 18:00:55,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 592 flow. Second operand has 5 states, 5 states have (on average 249.6) internal successors, (1248), 5 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:55,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:00:55,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 630 [2022-12-13 18:00:55,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:01:01,306 INFO L130 PetriNetUnfolder]: 37072/52008 cut-off events. [2022-12-13 18:01:01,306 INFO L131 PetriNetUnfolder]: For 3607/3607 co-relation queries the response was YES. [2022-12-13 18:01:01,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118185 conditions, 52008 events. 37072/52008 cut-off events. For 3607/3607 co-relation queries the response was YES. Maximal size of possible extension queue 1481. Compared 315928 event pairs, 29600 based on Foata normal form. 0/27008 useless extension candidates. Maximal degree in co-relation 118155. Up to 52008 conditions per place. [2022-12-13 18:01:01,573 INFO L137 encePairwiseOnDemand]: 627/630 looper letters, 97 selfloop transitions, 1 changer transitions 0/98 dead transitions. [2022-12-13 18:01:01,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 98 transitions, 784 flow [2022-12-13 18:01:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:01:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:01:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 795 transitions. [2022-12-13 18:01:01,576 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2022-12-13 18:01:01,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 795 transitions. [2022-12-13 18:01:01,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 795 transitions. [2022-12-13 18:01:01,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:01:01,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 795 transitions. [2022-12-13 18:01:01,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:01,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:01,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:01,579 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 592 flow. Second operand 3 states and 795 transitions. [2022-12-13 18:01:01,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 98 transitions, 784 flow [2022-12-13 18:01:01,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 98 transitions, 771 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:01:01,585 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 577 flow [2022-12-13 18:01:01,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=577, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2022-12-13 18:01:01,585 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 13 predicate places. [2022-12-13 18:01:01,585 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 577 flow [2022-12-13 18:01:01,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 249.6) internal successors, (1248), 5 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:01,586 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:01:01,586 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:01,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:01:01,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:01:01,788 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 18:01:01,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:01,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1124329907, now seen corresponding path program 1 times [2022-12-13 18:01:01,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:01:01,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689538918] [2022-12-13 18:01:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:01,790 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 18:01:01,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:01:01,793 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:01:01,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:01:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:02,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 18:01:02,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:02,121 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:01:02,122 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 18:01:02,233 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:01:02,234 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 18:01:02,351 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 18:01:02,352 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 18:01:02,359 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 18:01:02,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:01:02,402 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 18:01:02,410 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:01:02,410 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 18:01:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:02,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:01:07,450 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 18:01:07,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:01:07,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689538918] [2022-12-13 18:01:07,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689538918] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:01:07,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:01:07,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 18:01:07,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147740746] [2022-12-13 18:01:07,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:01:07,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 18:01:07,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:01:07,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 18:01:07,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:01:10,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:01:13,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:01:16,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:01:18,927 WARN L539 Checker$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 18:01:20,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:01:25,877 WARN L539 Checker$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 18:01:28,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:01:32,310 WARN L539 Checker$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 18:01:34,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:01:39,706 WARN L539 Checker$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 18:01:42,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:01:46,912 WARN L539 Checker$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 18:01:49,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:01:51,623 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 630 [2022-12-13 18:01:51,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 577 flow. Second operand has 10 states, 10 states have (on average 206.6) internal successors, (2066), 10 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:51,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:01:51,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 630 [2022-12-13 18:01:51,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:02:11,140 WARN L233 SmtUtils]: Spent 19.31s on a formula simplification. DAG size of input: 78 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:02:13,444 WARN L539 Checker$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 18:02:16,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:02:26,663 WARN L233 SmtUtils]: Spent 7.43s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:02:37,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:02:39,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:02:50,523 WARN L233 SmtUtils]: Spent 7.58s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:02:52,577 WARN L539 Checker$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 18:02:54,596 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 [1] [2022-12-13 18:03:34,677 INFO L130 PetriNetUnfolder]: 93932/129984 cut-off events. [2022-12-13 18:03:34,677 INFO L131 PetriNetUnfolder]: For 10239/10239 co-relation queries the response was YES. [2022-12-13 18:03:35,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292093 conditions, 129984 events. 93932/129984 cut-off events. For 10239/10239 co-relation queries the response was YES. Maximal size of possible extension queue 3369. Compared 853932 event pairs, 70410 based on Foata normal form. 0/69804 useless extension candidates. Maximal degree in co-relation 292063. Up to 50081 conditions per place. [2022-12-13 18:03:35,435 INFO L137 encePairwiseOnDemand]: 608/630 looper letters, 274 selfloop transitions, 67 changer transitions 0/341 dead transitions. [2022-12-13 18:03:35,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 341 transitions, 2417 flow [2022-12-13 18:03:35,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 18:03:35,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 18:03:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4331 transitions. [2022-12-13 18:03:35,445 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3437301587301587 [2022-12-13 18:03:35,445 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4331 transitions. [2022-12-13 18:03:35,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4331 transitions. [2022-12-13 18:03:35,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:03:35,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4331 transitions. [2022-12-13 18:03:35,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 216.55) internal successors, (4331), 20 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:35,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 630.0) internal successors, (13230), 21 states have internal predecessors, (13230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:35,461 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 630.0) internal successors, (13230), 21 states have internal predecessors, (13230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:35,461 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 577 flow. Second operand 20 states and 4331 transitions. [2022-12-13 18:03:35,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 341 transitions, 2417 flow [2022-12-13 18:03:35,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 341 transitions, 2416 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:03:35,471 INFO L231 Difference]: Finished difference. Result has 109 places, 150 transitions, 1272 flow [2022-12-13 18:03:35,471 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1272, PETRI_PLACES=109, PETRI_TRANSITIONS=150} [2022-12-13 18:03:35,471 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 39 predicate places. [2022-12-13 18:03:35,471 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 150 transitions, 1272 flow [2022-12-13 18:03:35,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.6) internal successors, (2066), 10 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:35,472 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:03:35,472 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:03:35,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 18:03:35,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:03:35,673 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 18:03:35,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:03:35,674 INFO L85 PathProgramCache]: Analyzing trace with hash -494487445, now seen corresponding path program 1 times [2022-12-13 18:03:35,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:03:35,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340128601] [2022-12-13 18:03:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:03:35,675 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 18:03:35,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:03:35,677 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:03:35,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:03:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:03:35,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:03:35,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:03:35,982 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 18:03:35,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:03:35,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:03:35,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340128601] [2022-12-13 18:03:35,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340128601] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:03:35,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:03:35,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:03:35,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601719583] [2022-12-13 18:03:35,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:03:35,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:03:35,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:03:35,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:03:35,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:03:36,002 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 630 [2022-12-13 18:03:36,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 150 transitions, 1272 flow. Second operand has 4 states, 4 states have (on average 257.25) internal successors, (1029), 4 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:36,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:03:36,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 630 [2022-12-13 18:03:36,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:04:13,556 INFO L130 PetriNetUnfolder]: 216132/298844 cut-off events. [2022-12-13 18:04:13,556 INFO L131 PetriNetUnfolder]: For 176108/176108 co-relation queries the response was YES. [2022-12-13 18:04:14,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 822287 conditions, 298844 events. 216132/298844 cut-off events. For 176108/176108 co-relation queries the response was YES. Maximal size of possible extension queue 8079. Compared 2202518 event pairs, 36230 based on Foata normal form. 5760/181904 useless extension candidates. Maximal degree in co-relation 822248. Up to 106581 conditions per place. [2022-12-13 18:04:15,758 INFO L137 encePairwiseOnDemand]: 621/630 looper letters, 240 selfloop transitions, 11 changer transitions 0/251 dead transitions. [2022-12-13 18:04:15,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 251 transitions, 2225 flow [2022-12-13 18:04:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:04:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:04:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1415 transitions. [2022-12-13 18:04:15,762 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4492063492063492 [2022-12-13 18:04:15,762 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1415 transitions. [2022-12-13 18:04:15,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1415 transitions. [2022-12-13 18:04:15,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:04:15,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1415 transitions. [2022-12-13 18:04:15,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:04:15,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 630.0) internal successors, (3780), 6 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:04:15,768 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 630.0) internal successors, (3780), 6 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:04:15,768 INFO L175 Difference]: Start difference. First operand has 109 places, 150 transitions, 1272 flow. Second operand 5 states and 1415 transitions. [2022-12-13 18:04:15,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 251 transitions, 2225 flow [2022-12-13 18:04:16,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 251 transitions, 2204 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 18:04:16,734 INFO L231 Difference]: Finished difference. Result has 116 places, 160 transitions, 1385 flow [2022-12-13 18:04:16,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1385, PETRI_PLACES=116, PETRI_TRANSITIONS=160} [2022-12-13 18:04:16,735 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 46 predicate places. [2022-12-13 18:04:16,735 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 160 transitions, 1385 flow [2022-12-13 18:04:16,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 257.25) internal successors, (1029), 4 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:04:16,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:04:16,735 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:16,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-12-13 18:04:16,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:04:16,937 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 18:04:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:16,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1853362643, now seen corresponding path program 1 times [2022-12-13 18:04:16,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:04:16,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436752267] [2022-12-13 18:04:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:16,939 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 18:04:16,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:04:16,942 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:04:16,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:04:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:17,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:04:17,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:04:17,072 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 18:04:17,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:04:17,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:04:17,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436752267] [2022-12-13 18:04:17,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436752267] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:04:17,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:04:17,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:04:17,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163582103] [2022-12-13 18:04:17,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:04:17,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:04:17,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:04:17,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:04:17,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:04:17,104 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 630 [2022-12-13 18:04:17,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 160 transitions, 1385 flow. Second operand has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:04:17,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:04:17,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 630 [2022-12-13 18:04:17,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:04:58,046 INFO L130 PetriNetUnfolder]: 226132/316344 cut-off events. [2022-12-13 18:04:58,046 INFO L131 PetriNetUnfolder]: For 402245/402245 co-relation queries the response was YES. [2022-12-13 18:04:59,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969253 conditions, 316344 events. 226132/316344 cut-off events. For 402245/402245 co-relation queries the response was YES. Maximal size of possible extension queue 8397. Compared 2373707 event pairs, 71670 based on Foata normal form. 13120/221224 useless extension candidates. Maximal degree in co-relation 969209. Up to 250501 conditions per place. [2022-12-13 18:05:00,585 INFO L137 encePairwiseOnDemand]: 623/630 looper letters, 185 selfloop transitions, 4 changer transitions 0/189 dead transitions. [2022-12-13 18:05:00,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 189 transitions, 1913 flow [2022-12-13 18:05:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:05:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:05:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 852 transitions. [2022-12-13 18:05:00,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4507936507936508 [2022-12-13 18:05:00,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 852 transitions. [2022-12-13 18:05:00,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 852 transitions. [2022-12-13 18:05:00,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:05:00,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 852 transitions. [2022-12-13 18:05:00,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:05:00,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:05:00,592 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:05:00,592 INFO L175 Difference]: Start difference. First operand has 116 places, 160 transitions, 1385 flow. Second operand 3 states and 852 transitions. [2022-12-13 18:05:00,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 189 transitions, 1913 flow [2022-12-13 18:05:01,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 189 transitions, 1913 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 18:05:01,557 INFO L231 Difference]: Finished difference. Result has 119 places, 159 transitions, 1393 flow [2022-12-13 18:05:01,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1393, PETRI_PLACES=119, PETRI_TRANSITIONS=159} [2022-12-13 18:05:01,558 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 49 predicate places. [2022-12-13 18:05:01,558 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 159 transitions, 1393 flow [2022-12-13 18:05:01,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:05:01,558 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:05:01,558 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1] [2022-12-13 18:05:01,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-13 18:05:01,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:05:01,760 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 18:05:01,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:05:01,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1712738310, now seen corresponding path program 1 times [2022-12-13 18:05:01,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:05:01,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5554066] [2022-12-13 18:05:01,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:05:01,762 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 18:05:01,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:05:01,765 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:05:01,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:05:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:05:01,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 18:05:01,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:05:01,926 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 18:05:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:05:02,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:05:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:05:04,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:05:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5554066] [2022-12-13 18:05:04,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5554066] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:05:04,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:05:04,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-12-13 18:05:04,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105854140] [2022-12-13 18:05:04,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:05:04,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 18:05:04,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:05:04,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 18:05:04,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:05:27,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 630 [2022-12-13 18:05:27,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 159 transitions, 1393 flow. Second operand has 20 states, 20 states have (on average 236.05) internal successors, (4721), 20 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:05:27,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:05:27,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 630 [2022-12-13 18:05:27,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:05:34,398 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 18:05:35,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:05:37,688 WARN L539 Checker$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 18:05:39,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:05:41,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:05:43,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:05:45,694 WARN L539 Checker$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 18:05:47,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:05:54,657 WARN L539 Checker$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 18:05:55,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:05:57,811 WARN L539 Checker$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 18:05:59,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:06:01,817 WARN L539 Checker$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 18:06:03,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:06:05,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:06:07,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:06:11,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:07:15,091 INFO L130 PetriNetUnfolder]: 271397/379688 cut-off events. [2022-12-13 18:07:15,091 INFO L131 PetriNetUnfolder]: For 561334/561334 co-relation queries the response was YES. [2022-12-13 18:07:16,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1243228 conditions, 379688 events. 271397/379688 cut-off events. For 561334/561334 co-relation queries the response was YES. Maximal size of possible extension queue 8939. Compared 2900297 event pairs, 192660 based on Foata normal form. 61/249861 useless extension candidates. Maximal degree in co-relation 1243181. Up to 120697 conditions per place. [2022-12-13 18:07:18,012 INFO L137 encePairwiseOnDemand]: 620/630 looper letters, 748 selfloop transitions, 116 changer transitions 0/864 dead transitions. [2022-12-13 18:07:18,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 864 transitions, 7635 flow [2022-12-13 18:07:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 18:07:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 18:07:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5743 transitions. [2022-12-13 18:07:18,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41435786435786437 [2022-12-13 18:07:18,021 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5743 transitions. [2022-12-13 18:07:18,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5743 transitions. [2022-12-13 18:07:18,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:07:18,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5743 transitions. [2022-12-13 18:07:18,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 261.04545454545456) internal successors, (5743), 22 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:18,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 630.0) internal successors, (14490), 23 states have internal predecessors, (14490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:18,037 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 630.0) internal successors, (14490), 23 states have internal predecessors, (14490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:18,037 INFO L175 Difference]: Start difference. First operand has 119 places, 159 transitions, 1393 flow. Second operand 22 states and 5743 transitions. [2022-12-13 18:07:18,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 864 transitions, 7635 flow [2022-12-13 18:07:19,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 864 transitions, 7598 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:07:19,858 INFO L231 Difference]: Finished difference. Result has 152 places, 207 transitions, 2301 flow [2022-12-13 18:07:19,859 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2301, PETRI_PLACES=152, PETRI_TRANSITIONS=207} [2022-12-13 18:07:19,859 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 82 predicate places. [2022-12-13 18:07:19,859 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 207 transitions, 2301 flow [2022-12-13 18:07:19,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 236.05) internal successors, (4721), 20 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:19,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:07:19,859 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:07:19,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 18:07:20,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:07:20,060 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 18:07:20,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:07:20,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1691639862, now seen corresponding path program 1 times [2022-12-13 18:07:20,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:07:20,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135320327] [2022-12-13 18:07:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:07:20,061 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 18:07:20,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:07:20,062 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:07:20,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:07:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:07:20,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:07:20,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:07:20,194 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 18:07:20,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:07:20,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:07:20,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135320327] [2022-12-13 18:07:20,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135320327] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:07:20,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:07:20,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:07:20,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431183480] [2022-12-13 18:07:20,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:07:20,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:07:20,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:07:20,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:07:20,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:07:20,205 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 630 [2022-12-13 18:07:20,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 207 transitions, 2301 flow. Second operand has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:07:20,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:07:20,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 630 [2022-12-13 18:07:20,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:08:04,041 INFO L130 PetriNetUnfolder]: 204845/289184 cut-off events. [2022-12-13 18:08:04,041 INFO L131 PetriNetUnfolder]: For 431497/431497 co-relation queries the response was YES. [2022-12-13 18:08:05,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973560 conditions, 289184 events. 204845/289184 cut-off events. For 431497/431497 co-relation queries the response was YES. Maximal size of possible extension queue 6545. Compared 2148962 event pairs, 71364 based on Foata normal form. 4608/189848 useless extension candidates. Maximal degree in co-relation 973499. Up to 249745 conditions per place. [2022-12-13 18:08:06,886 INFO L137 encePairwiseOnDemand]: 622/630 looper letters, 220 selfloop transitions, 3 changer transitions 1/224 dead transitions. [2022-12-13 18:08:06,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 224 transitions, 2837 flow [2022-12-13 18:08:06,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:08:06,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:08:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 848 transitions. [2022-12-13 18:08:06,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4486772486772487 [2022-12-13 18:08:06,889 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 848 transitions. [2022-12-13 18:08:06,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 848 transitions. [2022-12-13 18:08:06,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:08:06,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 848 transitions. [2022-12-13 18:08:06,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 282.6666666666667) internal successors, (848), 3 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:06,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:06,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 630.0) internal successors, (2520), 4 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:06,892 INFO L175 Difference]: Start difference. First operand has 152 places, 207 transitions, 2301 flow. Second operand 3 states and 848 transitions. [2022-12-13 18:08:06,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 224 transitions, 2837 flow [2022-12-13 18:08:07,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 224 transitions, 2638 flow, removed 30 selfloop flow, removed 7 redundant places. [2022-12-13 18:08:07,822 INFO L231 Difference]: Finished difference. Result has 148 places, 205 transitions, 2093 flow [2022-12-13 18:08:07,822 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2093, PETRI_PLACES=148, PETRI_TRANSITIONS=205} [2022-12-13 18:08:07,822 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 78 predicate places. [2022-12-13 18:08:07,822 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 205 transitions, 2093 flow [2022-12-13 18:08:07,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:07,822 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:08:07,822 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:08:07,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-12-13 18:08:08,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:08:08,024 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 18:08:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:08:08,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1828686673, now seen corresponding path program 2 times [2022-12-13 18:08:08,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:08:08,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769872404] [2022-12-13 18:08:08,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:08:08,027 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 18:08:08,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:08:08,030 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:08:08,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:08:08,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 18:08:08,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:08:08,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 18:08:08,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:08:08,399 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:08:08,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:08:08,601 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:08:08,602 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 18:08:08,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:08:08,789 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 18:08:08,838 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 18:08:08,838 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 18:08:08,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:08:08,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:08:08,975 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-13 18:08:08,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 18:08:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:08:09,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:08:09,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:08:09,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769872404] [2022-12-13 18:08:09,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769872404] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:08:09,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:08:09,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:08:09,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68509433] [2022-12-13 18:08:09,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:08:09,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:08:09,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:08:09,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:08:09,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:08:09,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 630 [2022-12-13 18:08:09,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 205 transitions, 2093 flow. Second operand has 5 states, 5 states have (on average 240.6) internal successors, (1203), 5 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:09,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:08:09,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 630 [2022-12-13 18:08:09,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:08:49,752 INFO L130 PetriNetUnfolder]: 174989/247208 cut-off events. [2022-12-13 18:08:49,752 INFO L131 PetriNetUnfolder]: For 403190/403190 co-relation queries the response was YES. [2022-12-13 18:08:51,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853250 conditions, 247208 events. 174989/247208 cut-off events. For 403190/403190 co-relation queries the response was YES. Maximal size of possible extension queue 5731. Compared 1813070 event pairs, 110724 based on Foata normal form. 11088/165680 useless extension candidates. Maximal degree in co-relation 853187. Up to 247194 conditions per place. [2022-12-13 18:08:52,319 INFO L137 encePairwiseOnDemand]: 625/630 looper letters, 187 selfloop transitions, 13 changer transitions 0/200 dead transitions. [2022-12-13 18:08:52,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 200 transitions, 2419 flow [2022-12-13 18:08:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:08:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:08:52,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1005 transitions. [2022-12-13 18:08:52,321 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2022-12-13 18:08:52,321 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1005 transitions. [2022-12-13 18:08:52,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1005 transitions. [2022-12-13 18:08:52,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:08:52,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1005 transitions. [2022-12-13 18:08:52,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 251.25) internal successors, (1005), 4 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:52,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 630.0) internal successors, (3150), 5 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:52,325 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 630.0) internal successors, (3150), 5 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:52,325 INFO L175 Difference]: Start difference. First operand has 148 places, 205 transitions, 2093 flow. Second operand 4 states and 1005 transitions. [2022-12-13 18:08:52,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 200 transitions, 2419 flow [2022-12-13 18:08:52,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 200 transitions, 2407 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 18:08:52,607 INFO L231 Difference]: Finished difference. Result has 145 places, 200 transitions, 2033 flow [2022-12-13 18:08:52,607 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2033, PETRI_PLACES=145, PETRI_TRANSITIONS=200} [2022-12-13 18:08:52,608 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 75 predicate places. [2022-12-13 18:08:52,608 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 200 transitions, 2033 flow [2022-12-13 18:08:52,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 240.6) internal successors, (1203), 5 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:52,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:08:52,608 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:08:52,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 18:08:52,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:08:52,811 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 18:08:52,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:08:52,812 INFO L85 PathProgramCache]: Analyzing trace with hash 423893559, now seen corresponding path program 1 times [2022-12-13 18:08:52,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:08:52,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367023898] [2022-12-13 18:08:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:08:52,813 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 18:08:52,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:08:52,816 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:08:52,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:08:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:08:53,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:08:53,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:08:53,231 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 18:08:53,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:08:53,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:08:53,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367023898] [2022-12-13 18:08:53,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367023898] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:08:53,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:08:53,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:08:53,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121895102] [2022-12-13 18:08:53,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:08:53,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:08:53,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:08:53,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:08:53,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:08:53,435 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 630 [2022-12-13 18:08:53,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 200 transitions, 2033 flow. Second operand has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:08:53,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:08:53,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 630 [2022-12-13 18:08:53,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:09:34,432 INFO L130 PetriNetUnfolder]: 190174/271571 cut-off events. [2022-12-13 18:09:34,432 INFO L131 PetriNetUnfolder]: For 230327/230327 co-relation queries the response was YES. [2022-12-13 18:09:36,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924180 conditions, 271571 events. 190174/271571 cut-off events. For 230327/230327 co-relation queries the response was YES. Maximal size of possible extension queue 5962. Compared 2043253 event pairs, 122736 based on Foata normal form. 1584/179147 useless extension candidates. Maximal degree in co-relation 924118. Up to 247192 conditions per place. [2022-12-13 18:09:37,206 INFO L137 encePairwiseOnDemand]: 623/630 looper letters, 201 selfloop transitions, 18 changer transitions 46/265 dead transitions. [2022-12-13 18:09:37,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 265 transitions, 3150 flow [2022-12-13 18:09:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:09:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:09:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1065 transitions. [2022-12-13 18:09:37,209 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2022-12-13 18:09:37,209 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1065 transitions. [2022-12-13 18:09:37,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1065 transitions. [2022-12-13 18:09:37,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:09:37,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1065 transitions. [2022-12-13 18:09:37,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 266.25) internal successors, (1065), 4 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:37,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 630.0) internal successors, (3150), 5 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:37,212 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 630.0) internal successors, (3150), 5 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:37,212 INFO L175 Difference]: Start difference. First operand has 145 places, 200 transitions, 2033 flow. Second operand 4 states and 1065 transitions. [2022-12-13 18:09:37,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 265 transitions, 3150 flow [2022-12-13 18:09:37,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 265 transitions, 3136 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:09:37,623 INFO L231 Difference]: Finished difference. Result has 147 places, 200 transitions, 2066 flow [2022-12-13 18:09:37,624 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=630, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2066, PETRI_PLACES=147, PETRI_TRANSITIONS=200} [2022-12-13 18:09:37,624 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 77 predicate places. [2022-12-13 18:09:37,624 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 200 transitions, 2066 flow [2022-12-13 18:09:37,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:09:37,624 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:09:37,625 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 1, 1] [2022-12-13 18:09:37,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:09:37,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:09:37,826 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-12-13 18:09:37,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:09:37,827 INFO L85 PathProgramCache]: Analyzing trace with hash -188961957, now seen corresponding path program 3 times [2022-12-13 18:09:37,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:09:37,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225368964] [2022-12-13 18:09:37,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:09:37,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:09:37,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:09:37,831 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:09:37,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0a24a7f-b57f-4581-a1e4-3a33d174d964/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:09:38,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 18:09:38,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:09:38,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 18:09:38,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:09:38,272 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:09:38,272 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 18:09:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:39,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:09:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:09:43,567 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:09:43,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225368964] [2022-12-13 18:09:43,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225368964] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:09:43,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:09:43,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-12-13 18:09:43,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345319703] [2022-12-13 18:09:43,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:09:43,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 18:09:43,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:09:43,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 18:09:43,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-12-13 18:10:24,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 630 [2022-12-13 18:10:24,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 200 transitions, 2066 flow. Second operand has 26 states, 26 states have (on average 236.0) internal successors, (6136), 26 states have internal predecessors, (6136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:10:24,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:10:24,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 630 [2022-12-13 18:10:24,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand