./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/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_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/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_7dbac435-41dc-4626-866b-4a81e0569d6a/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 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --- 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 11:37:33,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:37:33,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:37:33,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:37:33,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:37:33,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:37:33,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:37:33,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:37:33,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:37:33,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:37:33,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:37:33,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:37:33,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:37:33,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:37:33,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:37:33,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:37:33,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:37:33,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:37:33,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:37:33,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:37:33,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:37:33,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:37:33,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:37:33,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:37:33,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:37:33,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:37:33,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:37:33,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:37:33,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:37:33,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:37:33,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:37:33,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:37:33,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:37:33,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:37:33,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:37:33,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:37:33,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:37:33,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:37:33,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:37:33,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:37:33,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:37:33,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 11:37:33,278 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:37:33,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:37:33,278 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:37:33,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:37:33,279 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:37:33,279 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:37:33,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:37:33,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:37:33,279 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:37:33,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:37:33,280 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:37:33,280 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:37:33,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:37:33,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:37:33,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:37:33,291 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:37:33,291 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:37:33,291 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:37:33,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:37:33,292 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:37:33,292 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:37:33,292 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:37:33,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:37:33,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:37:33,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:37:33,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:37:33,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:37:33,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:37:33,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:37:33,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:37:33,294 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:37:33,294 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:37:33,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:37:33,294 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:37:33,295 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_7dbac435-41dc-4626-866b-4a81e0569d6a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 [2022-12-13 11:37:33,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:37:33,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:37:33,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:37:33,525 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:37:33,525 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:37:33,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-12-13 11:37:36,298 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:37:36,446 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:37:36,446 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-12-13 11:37:36,452 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/data/4a3505fb6/dc5ab28c41d940e0abf4aa81526bec90/FLAG7ce80b633 [2022-12-13 11:37:36,462 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/data/4a3505fb6/dc5ab28c41d940e0abf4aa81526bec90 [2022-12-13 11:37:36,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:37:36,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:37:36,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:37:36,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:37:36,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:37:36,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:37:36" (1/1) ... [2022-12-13 11:37:36,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@221b2704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:36, skipping insertion in model container [2022-12-13 11:37:36,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:37:36" (1/1) ... [2022-12-13 11:37:36,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:37:36,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:37:36,621 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_7dbac435-41dc-4626-866b-4a81e0569d6a/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-12-13 11:37:36,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:37:36,641 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 11:37:36,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@63175171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:36, skipping insertion in model container [2022-12-13 11:37:36,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:37:36,642 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 11:37:36,644 INFO L158 Benchmark]: Toolchain (without parser) took 177.27ms. Allocated memory is still 117.4MB. Free memory was 84.0MB in the beginning and 73.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 11:37:36,645 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 117.4MB. Free memory is still 88.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 11:37:36,645 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.67ms. Allocated memory is still 117.4MB. Free memory was 83.6MB in the beginning and 73.8MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 11:37:36,647 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 117.4MB. Free memory is still 88.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 175.67ms. Allocated memory is still 117.4MB. Free memory was 83.6MB in the beginning and 73.8MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/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_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/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_7dbac435-41dc-4626-866b-4a81e0569d6a/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 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --- 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 11:37:38,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:37:38,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:37:38,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:37:38,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:37:38,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:37:38,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:37:38,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:37:38,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:37:38,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:37:38,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:37:38,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:37:38,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:37:38,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:37:38,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:37:38,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:37:38,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:37:38,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:37:38,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:37:38,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:37:38,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:37:38,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:37:38,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:37:38,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:37:38,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:37:38,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:37:38,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:37:38,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:37:38,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:37:38,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:37:38,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:37:38,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:37:38,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:37:38,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:37:38,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:37:38,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:37:38,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:37:38,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:37:38,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:37:38,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:37:38,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:37:38,115 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 11:37:38,139 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:37:38,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:37:38,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:37:38,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:37:38,140 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:37:38,141 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:37:38,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:37:38,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:37:38,142 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:37:38,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:37:38,142 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:37:38,142 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:37:38,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:37:38,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:37:38,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:37:38,143 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:37:38,143 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:37:38,143 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:37:38,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:37:38,144 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:37:38,144 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 11:37:38,144 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 11:37:38,144 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:37:38,144 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:37:38,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:37:38,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:37:38,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:37:38,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:37:38,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:37:38,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:37:38,145 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 11:37:38,145 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 11:37:38,145 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:37:38,146 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:37:38,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:37:38,146 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 11:37:38,146 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:37:38,146 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_7dbac435-41dc-4626-866b-4a81e0569d6a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 [2022-12-13 11:37:38,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:37:38,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:37:38,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:37:38,407 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:37:38,407 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:37:38,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-12-13 11:37:41,001 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:37:41,157 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:37:41,157 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-12-13 11:37:41,163 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/data/62816824a/6aff4873567541d5a584b87ec2b3d343/FLAG9d5a29d62 [2022-12-13 11:37:41,174 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/data/62816824a/6aff4873567541d5a584b87ec2b3d343 [2022-12-13 11:37:41,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:37:41,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:37:41,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:37:41,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:37:41,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:37:41,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:37:41" (1/1) ... [2022-12-13 11:37:41,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55663cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:41, skipping insertion in model container [2022-12-13 11:37:41,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:37:41" (1/1) ... [2022-12-13 11:37:41,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:37:41,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:37:41,323 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_7dbac435-41dc-4626-866b-4a81e0569d6a/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-12-13 11:37:41,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:37:41,341 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 11:37:41,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:37:41,354 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_7dbac435-41dc-4626-866b-4a81e0569d6a/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-12-13 11:37:41,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:37:41,360 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:37:41,376 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_7dbac435-41dc-4626-866b-4a81e0569d6a/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-12-13 11:37:41,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:37:41,390 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:37:41,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:41 WrapperNode [2022-12-13 11:37:41,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:37:41,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:37:41,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:37:41,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:37:41,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:41" (1/1) ... [2022-12-13 11:37:41,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:41" (1/1) ... [2022-12-13 11:37:41,429 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 198 [2022-12-13 11:37:41,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:37:41,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:37:41,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:37:41,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:37:41,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:41" (1/1) ... [2022-12-13 11:37:41,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:41" (1/1) ... [2022-12-13 11:37:41,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:41" (1/1) ... [2022-12-13 11:37:41,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:41" (1/1) ... [2022-12-13 11:37:41,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:41" (1/1) ... [2022-12-13 11:37:41,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:41" (1/1) ... [2022-12-13 11:37:41,452 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:41" (1/1) ... [2022-12-13 11:37:41,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:41" (1/1) ... [2022-12-13 11:37:41,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:37:41,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:37:41,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:37:41,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:37:41,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:41" (1/1) ... [2022-12-13 11:37:41,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:37:41,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:37:41,479 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:37:41,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:37:41,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:37:41,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 11:37:41,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:37:41,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 11:37:41,522 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 11:37:41,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 11:37:41,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 11:37:41,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 11:37:41,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 11:37:41,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 11:37:41,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 11:37:41,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:37:41,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:37:41,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:37:41,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 11:37:41,525 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 11:37:41,628 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:37:41,630 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:37:42,269 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:37:42,276 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:37:42,276 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 11:37:42,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:37:42 BoogieIcfgContainer [2022-12-13 11:37:42,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:37:42,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:37:42,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:37:42,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:37:42,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:37:41" (1/3) ... [2022-12-13 11:37:42,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6770c5cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:37:42, skipping insertion in model container [2022-12-13 11:37:42,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:37:41" (2/3) ... [2022-12-13 11:37:42,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6770c5cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:37:42, skipping insertion in model container [2022-12-13 11:37:42,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:37:42" (3/3) ... [2022-12-13 11:37:42,285 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2022-12-13 11:37:42,298 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:37:42,299 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-12-13 11:37:42,299 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:37:42,358 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 11:37:42,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 346 transitions, 716 flow [2022-12-13 11:37:42,483 INFO L130 PetriNetUnfolder]: 30/343 cut-off events. [2022-12-13 11:37:42,483 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:37:42,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 343 events. 30/343 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 463 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 216. Up to 3 conditions per place. [2022-12-13 11:37:42,491 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 346 transitions, 716 flow [2022-12-13 11:37:42,499 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 338 transitions, 694 flow [2022-12-13 11:37:42,502 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:37:42,513 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 318 places, 338 transitions, 694 flow [2022-12-13 11:37:42,516 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 318 places, 338 transitions, 694 flow [2022-12-13 11:37:42,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 338 transitions, 694 flow [2022-12-13 11:37:42,578 INFO L130 PetriNetUnfolder]: 30/338 cut-off events. [2022-12-13 11:37:42,578 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:37:42,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 338 events. 30/338 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 464 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 216. Up to 3 conditions per place. [2022-12-13 11:37:42,582 INFO L119 LiptonReduction]: Number of co-enabled transitions 4560 [2022-12-13 11:38:51,810 INFO L134 LiptonReduction]: Checked pairs total: 7168 [2022-12-13 11:38:51,810 INFO L136 LiptonReduction]: Total number of compositions: 420 [2022-12-13 11:38:51,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:38:51,825 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;@1c1e803c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:38:51,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2022-12-13 11:38:51,826 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 11:38:51,827 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:38:51,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:38:51,827 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:38:51,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:38:51,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:51,831 INFO L85 PathProgramCache]: Analyzing trace with hash 42284, now seen corresponding path program 1 times [2022-12-13 11:38:51,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:38:51,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275421098] [2022-12-13 11:38:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:51,839 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 11:38:51,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:38:51,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:38:51,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:38:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:51,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:38:51,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:52,065 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 11:38:52,065 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 11:38:52,089 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 11:38:52,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:38:52,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:38:52,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275421098] [2022-12-13 11:38:52,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275421098] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:38:52,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:38:52,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:38:52,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477244867] [2022-12-13 11:38:52,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:38:52,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:38:52,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:38:52,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:38:52,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:38:52,388 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 766 [2022-12-13 11:38:52,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:52,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:38:52,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 766 [2022-12-13 11:38:52,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:38:53,381 INFO L130 PetriNetUnfolder]: 4438/6053 cut-off events. [2022-12-13 11:38:53,381 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2022-12-13 11:38:53,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12274 conditions, 6053 events. 4438/6053 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 27610 event pairs, 3367 based on Foata normal form. 0/1577 useless extension candidates. Maximal degree in co-relation 11012. Up to 6053 conditions per place. [2022-12-13 11:38:53,419 INFO L137 encePairwiseOnDemand]: 761/766 looper letters, 67 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2022-12-13 11:38:53,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 290 flow [2022-12-13 11:38:53,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:38:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:38:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 999 transitions. [2022-12-13 11:38:53,437 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4347258485639687 [2022-12-13 11:38:53,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 999 transitions. [2022-12-13 11:38:53,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 999 transitions. [2022-12-13 11:38:53,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:38:53,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 999 transitions. [2022-12-13 11:38:53,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 333.0) internal successors, (999), 3 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 11:38:53,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:53,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:53,456 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 162 flow. Second operand 3 states and 999 transitions. [2022-12-13 11:38:53,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 290 flow [2022-12-13 11:38:53,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 278 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 11:38:53,478 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 144 flow [2022-12-13 11:38:53,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2022-12-13 11:38:53,483 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2022-12-13 11:38:53,484 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 144 flow [2022-12-13 11:38:53,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:53,485 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:38:53,485 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:38:53,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:38:53,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:38:53,689 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:38:53,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash 42285, now seen corresponding path program 1 times [2022-12-13 11:38:53,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:38:53,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307063126] [2022-12-13 11:38:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:53,696 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 11:38:53,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:38:53,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:38:53,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:38:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:53,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:38:53,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:54,017 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:38:54,017 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 11:38:54,041 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 11:38:54,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:38:54,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:38:54,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307063126] [2022-12-13 11:38:54,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307063126] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:38:54,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:38:54,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:38:54,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908126722] [2022-12-13 11:38:54,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:38:54,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:38:54,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:38:54,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:38:54,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:38:54,424 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 766 [2022-12-13 11:38:54,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:54,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:38:54,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 766 [2022-12-13 11:38:54,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:38:56,459 INFO L130 PetriNetUnfolder]: 8875/12102 cut-off events. [2022-12-13 11:38:56,459 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:38:56,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24322 conditions, 12102 events. 8875/12102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 61139 event pairs, 6734 based on Foata normal form. 0/3153 useless extension candidates. Maximal degree in co-relation 24316. Up to 6054 conditions per place. [2022-12-13 11:38:56,523 INFO L137 encePairwiseOnDemand]: 757/766 looper letters, 126 selfloop transitions, 6 changer transitions 0/132 dead transitions. [2022-12-13 11:38:56,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 132 transitions, 542 flow [2022-12-13 11:38:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:38:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:38:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1062 transitions. [2022-12-13 11:38:56,527 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4621409921671018 [2022-12-13 11:38:56,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1062 transitions. [2022-12-13 11:38:56,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1062 transitions. [2022-12-13 11:38:56,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:38:56,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1062 transitions. [2022-12-13 11:38:56,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:56,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:56,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:56,538 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 144 flow. Second operand 3 states and 1062 transitions. [2022-12-13 11:38:56,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 132 transitions, 542 flow [2022-12-13 11:38:56,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 132 transitions, 541 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:38:56,542 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 193 flow [2022-12-13 11:38:56,542 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2022-12-13 11:38:56,543 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2022-12-13 11:38:56,543 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 193 flow [2022-12-13 11:38:56,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:56,544 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:38:56,544 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:38:56,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:38:56,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:38:56,746 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:38:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:56,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1318338, now seen corresponding path program 1 times [2022-12-13 11:38:56,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:38:56,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413269390] [2022-12-13 11:38:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:38:56,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:38:56,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:38:56,755 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:38:56,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:38:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:38:56,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:38:56,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:56,956 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:38:56,957 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 11:38:57,017 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 11:38:57,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:57,193 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 11:38:57,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:38:57,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413269390] [2022-12-13 11:38:57,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413269390] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:57,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:38:57,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 11:38:57,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928415493] [2022-12-13 11:38:57,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:57,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:38:57,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:38:57,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:38:57,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:38:58,959 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 766 [2022-12-13 11:38:58,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:38:58,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:38:58,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 766 [2022-12-13 11:38:58,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:02,769 INFO L130 PetriNetUnfolder]: 13322/18167 cut-off events. [2022-12-13 11:39:02,769 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:39:02,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36551 conditions, 18167 events. 13322/18167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 98045 event pairs, 10101 based on Foata normal form. 0/4750 useless extension candidates. Maximal degree in co-relation 36542. Up to 6055 conditions per place. [2022-12-13 11:39:02,836 INFO L137 encePairwiseOnDemand]: 754/766 looper letters, 185 selfloop transitions, 27 changer transitions 0/212 dead transitions. [2022-12-13 11:39:02,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 212 transitions, 949 flow [2022-12-13 11:39:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:39:02,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:39:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1985 transitions. [2022-12-13 11:39:02,840 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43189730200174065 [2022-12-13 11:39:02,840 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1985 transitions. [2022-12-13 11:39:02,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1985 transitions. [2022-12-13 11:39:02,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:02,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1985 transitions. [2022-12-13 11:39:02,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 330.8333333333333) internal successors, (1985), 6 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:02,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 766.0) internal successors, (5362), 7 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:02,848 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 766.0) internal successors, (5362), 7 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:02,848 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 193 flow. Second operand 6 states and 1985 transitions. [2022-12-13 11:39:02,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 212 transitions, 949 flow [2022-12-13 11:39:02,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 212 transitions, 925 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:39:02,851 INFO L231 Difference]: Finished difference. Result has 76 places, 94 transitions, 385 flow [2022-12-13 11:39:02,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=76, PETRI_TRANSITIONS=94} [2022-12-13 11:39:02,851 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2022-12-13 11:39:02,851 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 94 transitions, 385 flow [2022-12-13 11:39:02,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:02,852 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:02,852 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 11:39:02,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:03,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:03,054 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:39:03,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:03,056 INFO L85 PathProgramCache]: Analyzing trace with hash 40988993, now seen corresponding path program 1 times [2022-12-13 11:39:03,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:39:03,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051727483] [2022-12-13 11:39:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:03,058 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 11:39:03,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:39:03,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:03,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:03,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:39:03,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:03,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:39:03,281 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-13 11:39:03,281 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 11:39:03,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:39:03,568 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 11:39:03,569 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 11:39:03,849 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-12-13 11:39:03,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 76 [2022-12-13 11:39:04,230 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 11:39:04,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:39:04,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:39:04,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051727483] [2022-12-13 11:39:04,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051727483] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:04,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:04,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:39:04,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002023854] [2022-12-13 11:39:04,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:04,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:39:04,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:39:04,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:39:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:05,125 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 766 [2022-12-13 11:39:05,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 94 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 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 11:39:05,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:05,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 766 [2022-12-13 11:39:05,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:06,954 INFO L130 PetriNetUnfolder]: 10422/14382 cut-off events. [2022-12-13 11:39:06,954 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-13 11:39:06,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29043 conditions, 14382 events. 10422/14382 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 1193. Compared 76218 event pairs, 7854 based on Foata normal form. 0/4100 useless extension candidates. Maximal degree in co-relation 29030. Up to 14382 conditions per place. [2022-12-13 11:39:07,001 INFO L137 encePairwiseOnDemand]: 763/766 looper letters, 89 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2022-12-13 11:39:07,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 545 flow [2022-12-13 11:39:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:39:07,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2022-12-13 11:39:07,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4421235857267189 [2022-12-13 11:39:07,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2022-12-13 11:39:07,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2022-12-13 11:39:07,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:07,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2022-12-13 11:39:07,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:07,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:07,029 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:07,029 INFO L175 Difference]: Start difference. First operand has 76 places, 94 transitions, 385 flow. Second operand 3 states and 1016 transitions. [2022-12-13 11:39:07,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 545 flow [2022-12-13 11:39:07,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 90 transitions, 515 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 11:39:07,031 INFO L231 Difference]: Finished difference. Result has 75 places, 90 transitions, 337 flow [2022-12-13 11:39:07,032 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=337, PETRI_PLACES=75, PETRI_TRANSITIONS=90} [2022-12-13 11:39:07,032 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-12-13 11:39:07,032 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 90 transitions, 337 flow [2022-12-13 11:39:07,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 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 11:39:07,033 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:07,033 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 11:39:07,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:07,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:07,234 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:39:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:07,234 INFO L85 PathProgramCache]: Analyzing trace with hash 40988992, now seen corresponding path program 1 times [2022-12-13 11:39:07,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:39:07,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132095353] [2022-12-13 11:39:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:07,235 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 11:39:07,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:39:07,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:07,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:07,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:39:07,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:07,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:39:07,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:39:07,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:39:07,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:39:07,434 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-13 11:39:07,434 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 11:39:07,454 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 11:39:07,455 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 11:39:07,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:39:07,487 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 11:39:07,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:39:07,509 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 11:39:07,528 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 11:39:07,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:39:07,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:39:07,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132095353] [2022-12-13 11:39:07,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132095353] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:07,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:07,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:39:07,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769620484] [2022-12-13 11:39:07,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:07,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:39:07,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:39:07,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:39:07,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:07,914 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 766 [2022-12-13 11:39:07,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 90 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 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 11:39:07,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:07,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 766 [2022-12-13 11:39:07,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:09,231 INFO L130 PetriNetUnfolder]: 7522/10597 cut-off events. [2022-12-13 11:39:09,232 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 11:39:09,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21447 conditions, 10597 events. 7522/10597 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 55449 event pairs, 5607 based on Foata normal form. 0/3449 useless extension candidates. Maximal degree in co-relation 21433. Up to 10597 conditions per place. [2022-12-13 11:39:09,256 INFO L137 encePairwiseOnDemand]: 763/766 looper letters, 85 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2022-12-13 11:39:09,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 86 transitions, 489 flow [2022-12-13 11:39:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:39:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1014 transitions. [2022-12-13 11:39:09,258 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4412532637075718 [2022-12-13 11:39:09,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1014 transitions. [2022-12-13 11:39:09,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1014 transitions. [2022-12-13 11:39:09,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:09,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1014 transitions. [2022-12-13 11:39:09,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.0) internal successors, (1014), 3 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:09,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:09,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:09,263 INFO L175 Difference]: Start difference. First operand has 75 places, 90 transitions, 337 flow. Second operand 3 states and 1014 transitions. [2022-12-13 11:39:09,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 86 transitions, 489 flow [2022-12-13 11:39:09,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:39:09,265 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 318 flow [2022-12-13 11:39:09,265 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=72, 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=318, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2022-12-13 11:39:09,265 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2022-12-13 11:39:09,265 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 318 flow [2022-12-13 11:39:09,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 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 11:39:09,266 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:09,266 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 11:39:09,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:09,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:09,468 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:39:09,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:09,469 INFO L85 PathProgramCache]: Analyzing trace with hash 627352173, now seen corresponding path program 2 times [2022-12-13 11:39:09,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:39:09,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380057105] [2022-12-13 11:39:09,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:39:09,472 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 11:39:09,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:39:09,476 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:09,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:09,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:39:09,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:39:09,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:39:09,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:09,768 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:39:09,769 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 11:39:09,884 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 11:39:09,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:39:10,549 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 11:39:10,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:39:10,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380057105] [2022-12-13 11:39:10,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380057105] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:39:10,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:39:10,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:39:10,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405122154] [2022-12-13 11:39:10,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:39:10,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:39:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:39:10,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:39:10,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:39:18,341 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 766 [2022-12-13 11:39:18,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 318 flow. Second operand has 12 states, 12 states have (on average 298.0) internal successors, (3576), 12 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:18,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:18,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 766 [2022-12-13 11:39:18,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:21,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:23,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:25,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:26,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:29,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:32,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:33,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:35,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:39:43,597 INFO L130 PetriNetUnfolder]: 20046/28231 cut-off events. [2022-12-13 11:39:43,597 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-12-13 11:39:43,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57061 conditions, 28231 events. 20046/28231 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 161834 event pairs, 14952 based on Foata normal form. 13/9176 useless extension candidates. Maximal degree in co-relation 57046. Up to 3543 conditions per place. [2022-12-13 11:39:43,680 INFO L137 encePairwiseOnDemand]: 756/766 looper letters, 449 selfloop transitions, 46 changer transitions 0/495 dead transitions. [2022-12-13 11:39:43,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 495 transitions, 2296 flow [2022-12-13 11:39:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 11:39:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 11:39:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4963 transitions. [2022-12-13 11:39:43,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.431940818102698 [2022-12-13 11:39:43,693 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4963 transitions. [2022-12-13 11:39:43,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4963 transitions. [2022-12-13 11:39:43,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:43,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4963 transitions. [2022-12-13 11:39:43,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 330.8666666666667) internal successors, (4963), 15 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:43,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 766.0) internal successors, (12256), 16 states have internal predecessors, (12256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:43,722 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 766.0) internal successors, (12256), 16 states have internal predecessors, (12256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:43,722 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 318 flow. Second operand 15 states and 4963 transitions. [2022-12-13 11:39:43,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 495 transitions, 2296 flow [2022-12-13 11:39:43,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 495 transitions, 2295 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:39:43,730 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 636 flow [2022-12-13 11:39:43,730 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=636, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2022-12-13 11:39:43,730 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 22 predicate places. [2022-12-13 11:39:43,730 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 636 flow [2022-12-13 11:39:43,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 298.0) internal successors, (3576), 12 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:43,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:43,732 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:39:43,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:43,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:43,934 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:39:43,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:43,935 INFO L85 PathProgramCache]: Analyzing trace with hash 735742829, now seen corresponding path program 1 times [2022-12-13 11:39:43,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:39:43,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350352398] [2022-12-13 11:39:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:43,937 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 11:39:43,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:39:43,940 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:43,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:44,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:39:44,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:44,160 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 11:39:44,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:39:44,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:39:44,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350352398] [2022-12-13 11:39:44,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350352398] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:44,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:44,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:39:44,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006184400] [2022-12-13 11:39:44,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:44,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:39:44,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:39:44,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:39:44,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:44,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 766 [2022-12-13 11:39:44,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 636 flow. Second operand has 4 states, 4 states have (on average 309.5) internal successors, (1238), 4 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:44,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:44,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 766 [2022-12-13 11:39:44,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:48,556 INFO L130 PetriNetUnfolder]: 26784/38470 cut-off events. [2022-12-13 11:39:48,556 INFO L131 PetriNetUnfolder]: For 135/135 co-relation queries the response was YES. [2022-12-13 11:39:48,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77914 conditions, 38470 events. 26784/38470 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 1394. Compared 241822 event pairs, 20304 based on Foata normal form. 0/13233 useless extension candidates. Maximal degree in co-relation 77889. Up to 28230 conditions per place. [2022-12-13 11:39:48,736 INFO L137 encePairwiseOnDemand]: 754/766 looper letters, 184 selfloop transitions, 3 changer transitions 0/187 dead transitions. [2022-12-13 11:39:48,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 187 transitions, 1398 flow [2022-12-13 11:39:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:39:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:39:48,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1356 transitions. [2022-12-13 11:39:48,740 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4425587467362924 [2022-12-13 11:39:48,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1356 transitions. [2022-12-13 11:39:48,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1356 transitions. [2022-12-13 11:39:48,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:48,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1356 transitions. [2022-12-13 11:39:48,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:48,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:48,749 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:48,749 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 636 flow. Second operand 4 states and 1356 transitions. [2022-12-13 11:39:48,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 187 transitions, 1398 flow [2022-12-13 11:39:48,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 187 transitions, 1247 flow, removed 37 selfloop flow, removed 4 redundant places. [2022-12-13 11:39:48,758 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 562 flow [2022-12-13 11:39:48,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=562, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2022-12-13 11:39:48,759 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 22 predicate places. [2022-12-13 11:39:48,760 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 562 flow [2022-12-13 11:39:48,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 309.5) internal successors, (1238), 4 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:48,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:48,761 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:39:48,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:48,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:48,963 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:39:48,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:48,964 INFO L85 PathProgramCache]: Analyzing trace with hash 735742995, now seen corresponding path program 1 times [2022-12-13 11:39:48,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:39:48,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837641919] [2022-12-13 11:39:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:48,966 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 11:39:48,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:39:48,970 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:48,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:49,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:39:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:49,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:39:49,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:39:49,190 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-13 11:39:49,190 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 11:39:49,201 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 11:39:49,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:39:49,254 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 11:39:49,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:39:49,275 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 11:39:49,320 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 11:39:49,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:39:49,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:39:49,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837641919] [2022-12-13 11:39:49,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837641919] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:49,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:49,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:39:49,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800041364] [2022-12-13 11:39:49,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:49,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:39:49,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:39:49,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:39:49,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:49,789 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 766 [2022-12-13 11:39:49,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 562 flow. Second operand has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:49,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:49,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 766 [2022-12-13 11:39:49,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:53,528 INFO L130 PetriNetUnfolder]: 25272/36214 cut-off events. [2022-12-13 11:39:53,528 INFO L131 PetriNetUnfolder]: For 1105/1105 co-relation queries the response was YES. [2022-12-13 11:39:53,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77948 conditions, 36214 events. 25272/36214 cut-off events. For 1105/1105 co-relation queries the response was YES. Maximal size of possible extension queue 1344. Compared 224454 event pairs, 19112 based on Foata normal form. 0/13838 useless extension candidates. Maximal degree in co-relation 77921. Up to 36214 conditions per place. [2022-12-13 11:39:53,675 INFO L137 encePairwiseOnDemand]: 763/766 looper letters, 108 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2022-12-13 11:39:53,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 109 transitions, 776 flow [2022-12-13 11:39:53,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:39:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1012 transitions. [2022-12-13 11:39:53,679 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44038294168842473 [2022-12-13 11:39:53,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1012 transitions. [2022-12-13 11:39:53,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1012 transitions. [2022-12-13 11:39:53,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:53,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1012 transitions. [2022-12-13 11:39:53,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 337.3333333333333) internal successors, (1012), 3 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:53,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:53,683 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:53,683 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 562 flow. Second operand 3 states and 1012 transitions. [2022-12-13 11:39:53,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 109 transitions, 776 flow [2022-12-13 11:39:53,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 109 transitions, 770 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 11:39:53,690 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 554 flow [2022-12-13 11:39:53,690 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=554, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2022-12-13 11:39:53,690 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2022-12-13 11:39:53,690 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 554 flow [2022-12-13 11:39:53,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:53,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:53,691 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:39:53,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:53,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:53,892 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:39:53,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:53,893 INFO L85 PathProgramCache]: Analyzing trace with hash 735742996, now seen corresponding path program 1 times [2022-12-13 11:39:53,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:39:53,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669610955] [2022-12-13 11:39:53,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:53,894 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 11:39:53,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:39:53,895 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:53,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:53,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:39:53,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:54,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:39:54,063 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-13 11:39:54,063 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 4 case distinctions, treesize of input 29 treesize of output 48 [2022-12-13 11:39:54,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:39:54,261 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-12-13 11:39:54,261 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 11:39:54,444 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-13 11:39:54,444 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 11:39:54,543 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 11:39:54,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:39:54,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:39:54,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669610955] [2022-12-13 11:39:54,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669610955] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:54,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:54,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:39:54,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372751437] [2022-12-13 11:39:54,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:54,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:39:54,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:39:54,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:39:54,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:55,260 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 766 [2022-12-13 11:39:55,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 554 flow. Second operand has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:55,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:55,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 766 [2022-12-13 11:39:55,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:58,936 INFO L130 PetriNetUnfolder]: 23760/33958 cut-off events. [2022-12-13 11:39:58,936 INFO L131 PetriNetUnfolder]: For 1099/1099 co-relation queries the response was YES. [2022-12-13 11:39:58,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73394 conditions, 33958 events. 23760/33958 cut-off events. For 1099/1099 co-relation queries the response was YES. Maximal size of possible extension queue 1294. Compared 207339 event pairs, 17920 based on Foata normal form. 0/13502 useless extension candidates. Maximal degree in co-relation 73366. Up to 33958 conditions per place. [2022-12-13 11:39:59,075 INFO L137 encePairwiseOnDemand]: 763/766 looper letters, 106 selfloop transitions, 1 changer transitions 0/107 dead transitions. [2022-12-13 11:39:59,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 107 transitions, 764 flow [2022-12-13 11:39:59,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:39:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1010 transitions. [2022-12-13 11:39:59,079 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4395126196692776 [2022-12-13 11:39:59,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1010 transitions. [2022-12-13 11:39:59,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1010 transitions. [2022-12-13 11:39:59,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:59,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1010 transitions. [2022-12-13 11:39:59,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:59,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:59,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:59,083 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 554 flow. Second operand 3 states and 1010 transitions. [2022-12-13 11:39:59,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 107 transitions, 764 flow [2022-12-13 11:39:59,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 107 transitions, 763 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:39:59,090 INFO L231 Difference]: Finished difference. Result has 94 places, 107 transitions, 551 flow [2022-12-13 11:39:59,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=551, PETRI_PLACES=94, PETRI_TRANSITIONS=107} [2022-12-13 11:39:59,091 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2022-12-13 11:39:59,091 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 107 transitions, 551 flow [2022-12-13 11:39:59,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:59,092 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:59,092 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:59,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-12-13 11:39:59,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:59,293 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:39:59,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:59,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1918520958, now seen corresponding path program 1 times [2022-12-13 11:39:59,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:39:59,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041175030] [2022-12-13 11:39:59,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:59,296 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 11:39:59,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:39:59,300 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:59,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:39:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:59,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:39:59,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:59,440 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 11:39:59,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:39:59,440 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:39:59,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041175030] [2022-12-13 11:39:59,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041175030] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:59,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:59,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:39:59,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601182025] [2022-12-13 11:39:59,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:59,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:39:59,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:39:59,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:39:59,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:39:59,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 766 [2022-12-13 11:39:59,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 107 transitions, 551 flow. Second operand has 5 states, 5 states have (on average 308.4) internal successors, (1542), 5 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:59,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:59,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 766 [2022-12-13 11:39:59,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:40:08,101 INFO L130 PetriNetUnfolder]: 52754/75884 cut-off events. [2022-12-13 11:40:08,101 INFO L131 PetriNetUnfolder]: For 2061/2061 co-relation queries the response was YES. [2022-12-13 11:40:08,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162657 conditions, 75884 events. 52754/75884 cut-off events. For 2061/2061 co-relation queries the response was YES. Maximal size of possible extension queue 2591. Compared 527231 event pairs, 26320 based on Foata normal form. 920/31556 useless extension candidates. Maximal degree in co-relation 162628. Up to 33033 conditions per place. [2022-12-13 11:40:08,538 INFO L137 encePairwiseOnDemand]: 752/766 looper letters, 194 selfloop transitions, 15 changer transitions 0/209 dead transitions. [2022-12-13 11:40:08,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 209 transitions, 1283 flow [2022-12-13 11:40:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:40:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:40:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1697 transitions. [2022-12-13 11:40:08,542 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4430809399477807 [2022-12-13 11:40:08,542 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1697 transitions. [2022-12-13 11:40:08,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1697 transitions. [2022-12-13 11:40:08,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:40:08,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1697 transitions. [2022-12-13 11:40:08,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 339.4) internal successors, (1697), 5 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:08,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 766.0) internal successors, (4596), 6 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:08,548 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 766.0) internal successors, (4596), 6 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:08,548 INFO L175 Difference]: Start difference. First operand has 94 places, 107 transitions, 551 flow. Second operand 5 states and 1697 transitions. [2022-12-13 11:40:08,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 209 transitions, 1283 flow [2022-12-13 11:40:08,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 209 transitions, 1282 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:40:08,554 INFO L231 Difference]: Finished difference. Result has 99 places, 108 transitions, 617 flow [2022-12-13 11:40:08,554 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=617, PETRI_PLACES=99, PETRI_TRANSITIONS=108} [2022-12-13 11:40:08,555 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2022-12-13 11:40:08,555 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 108 transitions, 617 flow [2022-12-13 11:40:08,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 308.4) internal successors, (1542), 5 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:08,555 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:40:08,555 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:08,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:08,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:08,757 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:40:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:08,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1620558163, now seen corresponding path program 1 times [2022-12-13 11:40:08,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:40:08,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689281753] [2022-12-13 11:40:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:08,760 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 11:40:08,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:40:08,764 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:08,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:08,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:40:08,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:08,942 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 11:40:08,942 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 11:40:08,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:40:08,978 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 11:40:09,009 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 11:40:09,010 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 11:40:09,057 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 11:40:09,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:40:09,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:40:09,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689281753] [2022-12-13 11:40:09,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689281753] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:40:09,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:40:09,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:40:09,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445881668] [2022-12-13 11:40:09,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:40:09,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:40:09,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:40:09,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:40:09,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:40:09,371 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 766 [2022-12-13 11:40:09,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 108 transitions, 617 flow. Second operand has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:09,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:40:09,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 766 [2022-12-13 11:40:09,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:40:16,686 INFO L130 PetriNetUnfolder]: 50170/71940 cut-off events. [2022-12-13 11:40:16,687 INFO L131 PetriNetUnfolder]: For 6214/6214 co-relation queries the response was YES. [2022-12-13 11:40:16,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165430 conditions, 71940 events. 50170/71940 cut-off events. For 6214/6214 co-relation queries the response was YES. Maximal size of possible extension queue 2455. Compared 486704 event pairs, 38888 based on Foata normal form. 0/31484 useless extension candidates. Maximal degree in co-relation 165398. Up to 71940 conditions per place. [2022-12-13 11:40:17,070 INFO L137 encePairwiseOnDemand]: 763/766 looper letters, 105 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2022-12-13 11:40:17,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 106 transitions, 825 flow [2022-12-13 11:40:17,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:40:17,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:40:17,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 996 transitions. [2022-12-13 11:40:17,073 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43342036553524804 [2022-12-13 11:40:17,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 996 transitions. [2022-12-13 11:40:17,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 996 transitions. [2022-12-13 11:40:17,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:40:17,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 996 transitions. [2022-12-13 11:40:17,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.0) internal successors, (996), 3 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:17,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:17,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:17,077 INFO L175 Difference]: Start difference. First operand has 99 places, 108 transitions, 617 flow. Second operand 3 states and 996 transitions. [2022-12-13 11:40:17,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 106 transitions, 825 flow [2022-12-13 11:40:17,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 106 transitions, 819 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 11:40:17,090 INFO L231 Difference]: Finished difference. Result has 98 places, 106 transitions, 609 flow [2022-12-13 11:40:17,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=609, PETRI_PLACES=98, PETRI_TRANSITIONS=106} [2022-12-13 11:40:17,090 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 24 predicate places. [2022-12-13 11:40:17,091 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 106 transitions, 609 flow [2022-12-13 11:40:17,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:17,091 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:40:17,091 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:17,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:17,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:17,292 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:40:17,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:17,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1620558161, now seen corresponding path program 1 times [2022-12-13 11:40:17,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:40:17,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518950089] [2022-12-13 11:40:17,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:17,295 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 11:40:17,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:40:17,298 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:17,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:17,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:40:17,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:17,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:40:17,519 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-13 11:40:17,520 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 11:40:17,534 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 130 treesize of output 126 [2022-12-13 11:40:17,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:40:17,580 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 11:40:17,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:40:17,609 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 11:40:17,667 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 11:40:17,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:40:17,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:40:17,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518950089] [2022-12-13 11:40:17,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518950089] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:40:17,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:40:17,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:40:17,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929571853] [2022-12-13 11:40:17,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:40:17,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:40:17,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:40:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:40:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:40:18,249 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 766 [2022-12-13 11:40:18,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 106 transitions, 609 flow. Second operand has 5 states, 5 states have (on average 315.6) internal successors, (1578), 5 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:18,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:40:18,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 766 [2022-12-13 11:40:18,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:40:25,316 INFO L130 PetriNetUnfolder]: 47586/67996 cut-off events. [2022-12-13 11:40:25,317 INFO L131 PetriNetUnfolder]: For 5993/5993 co-relation queries the response was YES. [2022-12-13 11:40:25,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155451 conditions, 67996 events. 47586/67996 cut-off events. For 5993/5993 co-relation queries the response was YES. Maximal size of possible extension queue 2322. Compared 453499 event pairs, 36832 based on Foata normal form. 0/30508 useless extension candidates. Maximal degree in co-relation 155418. Up to 67996 conditions per place. [2022-12-13 11:40:25,690 INFO L137 encePairwiseOnDemand]: 763/766 looper letters, 103 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2022-12-13 11:40:25,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 104 transitions, 813 flow [2022-12-13 11:40:25,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:40:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:40:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1000 transitions. [2022-12-13 11:40:25,694 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4351610095735422 [2022-12-13 11:40:25,694 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1000 transitions. [2022-12-13 11:40:25,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1000 transitions. [2022-12-13 11:40:25,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:40:25,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1000 transitions. [2022-12-13 11:40:25,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 333.3333333333333) internal successors, (1000), 3 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:25,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:25,698 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:25,698 INFO L175 Difference]: Start difference. First operand has 98 places, 106 transitions, 609 flow. Second operand 3 states and 1000 transitions. [2022-12-13 11:40:25,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 104 transitions, 813 flow [2022-12-13 11:40:25,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 104 transitions, 812 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:40:25,710 INFO L231 Difference]: Finished difference. Result has 97 places, 104 transitions, 606 flow [2022-12-13 11:40:25,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=606, PETRI_PLACES=97, PETRI_TRANSITIONS=104} [2022-12-13 11:40:25,710 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 23 predicate places. [2022-12-13 11:40:25,710 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 104 transitions, 606 flow [2022-12-13 11:40:25,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 315.6) internal successors, (1578), 5 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:25,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:40:25,711 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:25,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:25,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:25,912 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:40:25,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:25,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1620558326, now seen corresponding path program 1 times [2022-12-13 11:40:25,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:40:25,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786297656] [2022-12-13 11:40:25,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:25,913 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 11:40:25,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:40:25,914 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:25,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:26,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:40:26,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:26,075 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 11:40:26,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:40:26,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:40:26,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786297656] [2022-12-13 11:40:26,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786297656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:40:26,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:40:26,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:40:26,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106211474] [2022-12-13 11:40:26,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:40:26,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:40:26,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:40:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:40:26,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:40:26,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 766 [2022-12-13 11:40:26,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 104 transitions, 606 flow. Second operand has 5 states, 5 states have (on average 308.6) internal successors, (1543), 5 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:26,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:40:26,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 766 [2022-12-13 11:40:26,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:40:37,841 INFO L130 PetriNetUnfolder]: 77714/110012 cut-off events. [2022-12-13 11:40:37,841 INFO L131 PetriNetUnfolder]: For 13561/13561 co-relation queries the response was YES. [2022-12-13 11:40:38,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257596 conditions, 110012 events. 77714/110012 cut-off events. For 13561/13561 co-relation queries the response was YES. Maximal size of possible extension queue 3644. Compared 770359 event pairs, 31072 based on Foata normal form. 0/48956 useless extension candidates. Maximal degree in co-relation 257562. Up to 54881 conditions per place. [2022-12-13 11:40:38,502 INFO L137 encePairwiseOnDemand]: 751/766 looper letters, 170 selfloop transitions, 16 changer transitions 0/186 dead transitions. [2022-12-13 11:40:38,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 186 transitions, 1273 flow [2022-12-13 11:40:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:40:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:40:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1672 transitions. [2022-12-13 11:40:38,506 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43655352480417753 [2022-12-13 11:40:38,506 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1672 transitions. [2022-12-13 11:40:38,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1672 transitions. [2022-12-13 11:40:38,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:40:38,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1672 transitions. [2022-12-13 11:40:38,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 334.4) internal successors, (1672), 5 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:38,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 766.0) internal successors, (4596), 6 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:38,512 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 766.0) internal successors, (4596), 6 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:38,512 INFO L175 Difference]: Start difference. First operand has 97 places, 104 transitions, 606 flow. Second operand 5 states and 1672 transitions. [2022-12-13 11:40:38,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 186 transitions, 1273 flow [2022-12-13 11:40:38,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 186 transitions, 1272 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:40:38,536 INFO L231 Difference]: Finished difference. Result has 102 places, 106 transitions, 680 flow [2022-12-13 11:40:38,537 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=680, PETRI_PLACES=102, PETRI_TRANSITIONS=106} [2022-12-13 11:40:38,537 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 28 predicate places. [2022-12-13 11:40:38,537 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 106 transitions, 680 flow [2022-12-13 11:40:38,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 308.6) internal successors, (1543), 5 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:38,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:40:38,538 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:38,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:38,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:38,738 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:40:38,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:38,739 INFO L85 PathProgramCache]: Analyzing trace with hash 626768559, now seen corresponding path program 1 times [2022-12-13 11:40:38,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:40:38,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160497969] [2022-12-13 11:40:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:38,739 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 11:40:38,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:40:38,740 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:38,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:40:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:38,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 11:40:38,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:38,985 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:40:38,985 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 11:40:39,070 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 11:40:39,071 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 11:40:39,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:40:39,165 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 11:40:39,179 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 11:40:39,180 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 11:40:39,262 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-13 11:40:39,263 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 11:40:39,269 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 11:40:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:40:39,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:40:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:40:40,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:40:40,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160497969] [2022-12-13 11:40:40,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160497969] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:40:40,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:40:40,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-12-13 11:40:40,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775564453] [2022-12-13 11:40:40,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:40:40,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 11:40:40,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:40:40,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 11:40:40,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-12-13 11:40:42,373 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 11:40:46,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:40:48,507 WARN L539 Checker$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 11:40:50,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:40:53,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:40:55,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:40:57,428 WARN L539 Checker$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 11:41:00,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:41:02,391 WARN L539 Checker$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 11:41:04,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:41:07,148 WARN L539 Checker$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 11:41:09,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:41:11,470 WARN L539 Checker$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 11:41:13,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:41:16,921 WARN L539 Checker$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 11:41:20,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:41:22,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:41:24,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:41:27,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:41:29,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:41:33,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:41:35,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:41:37,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:41:40,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:41:42,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:41:45,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:41:47,585 WARN L539 Checker$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 11:41:48,210 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 766 [2022-12-13 11:41:48,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 106 transitions, 680 flow. Second operand has 11 states, 11 states have (on average 246.45454545454547) internal successors, (2711), 11 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:41:48,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:41:48,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 766 [2022-12-13 11:41:48,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:41:54,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:41:56,928 WARN L539 Checker$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 11:41:59,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:42:03,962 WARN L539 Checker$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 11:42:05,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:42:18,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 11:42:26,148 WARN L233 SmtUtils]: Spent 5.00s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:42:56,774 INFO L130 PetriNetUnfolder]: 126568/180950 cut-off events. [2022-12-13 11:42:56,774 INFO L131 PetriNetUnfolder]: For 32309/32309 co-relation queries the response was YES. [2022-12-13 11:42:57,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466683 conditions, 180950 events. 126568/180950 cut-off events. For 32309/32309 co-relation queries the response was YES. Maximal size of possible extension queue 5999. Compared 1383853 event pairs, 72095 based on Foata normal form. 0/97904 useless extension candidates. Maximal degree in co-relation 466646. Up to 46424 conditions per place. [2022-12-13 11:42:57,910 INFO L137 encePairwiseOnDemand]: 744/766 looper letters, 511 selfloop transitions, 78 changer transitions 0/589 dead transitions. [2022-12-13 11:42:57,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 589 transitions, 3769 flow [2022-12-13 11:42:57,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 11:42:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 11:42:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4931 transitions. [2022-12-13 11:42:57,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3576298230345228 [2022-12-13 11:42:57,922 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4931 transitions. [2022-12-13 11:42:57,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4931 transitions. [2022-12-13 11:42:57,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:42:57,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4931 transitions. [2022-12-13 11:42:57,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 273.94444444444446) internal successors, (4931), 18 states have internal predecessors, (4931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:42:57,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 766.0) internal successors, (14554), 19 states have internal predecessors, (14554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:42:57,940 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 766.0) internal successors, (14554), 19 states have internal predecessors, (14554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:42:57,940 INFO L175 Difference]: Start difference. First operand has 102 places, 106 transitions, 680 flow. Second operand 18 states and 4931 transitions. [2022-12-13 11:42:57,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 589 transitions, 3769 flow [2022-12-13 11:42:58,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 589 transitions, 3738 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:42:58,031 INFO L231 Difference]: Finished difference. Result has 131 places, 168 transitions, 1546 flow [2022-12-13 11:42:58,031 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1546, PETRI_PLACES=131, PETRI_TRANSITIONS=168} [2022-12-13 11:42:58,031 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 57 predicate places. [2022-12-13 11:42:58,032 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 168 transitions, 1546 flow [2022-12-13 11:42:58,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 246.45454545454547) internal successors, (2711), 11 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:42:58,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:42:58,032 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:42:58,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:42:58,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:42:58,234 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:42:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:42:58,235 INFO L85 PathProgramCache]: Analyzing trace with hash 626768678, now seen corresponding path program 1 times [2022-12-13 11:42:58,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:42:58,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929793844] [2022-12-13 11:42:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:42:58,236 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 11:42:58,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:42:58,239 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:42:58,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:42:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:42:58,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:42:58,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:42:58,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 11:42:58,522 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 11:42:58,522 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 11:42:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:42:58,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:42:58,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:42:58,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929793844] [2022-12-13 11:42:58,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929793844] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:42:58,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:42:58,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:42:58,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143287726] [2022-12-13 11:42:58,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:42:58,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:42:58,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:42:58,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:42:58,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:42:58,858 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 766 [2022-12-13 11:42:58,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 168 transitions, 1546 flow. Second operand has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:42:58,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:42:58,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 766 [2022-12-13 11:42:58,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:43:16,943 INFO L130 PetriNetUnfolder]: 99052/142322 cut-off events. [2022-12-13 11:43:16,943 INFO L131 PetriNetUnfolder]: For 196046/196046 co-relation queries the response was YES. [2022-12-13 11:43:17,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435287 conditions, 142322 events. 99052/142322 cut-off events. For 196046/196046 co-relation queries the response was YES. Maximal size of possible extension queue 4820. Compared 1076803 event pairs, 75852 based on Foata normal form. 0/89584 useless extension candidates. Maximal degree in co-relation 435235. Up to 142254 conditions per place. [2022-12-13 11:43:18,064 INFO L137 encePairwiseOnDemand]: 760/766 looper letters, 131 selfloop transitions, 29 changer transitions 0/160 dead transitions. [2022-12-13 11:43:18,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 160 transitions, 1798 flow [2022-12-13 11:43:18,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:43:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:43:18,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1252 transitions. [2022-12-13 11:43:18,069 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4086161879895561 [2022-12-13 11:43:18,069 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1252 transitions. [2022-12-13 11:43:18,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1252 transitions. [2022-12-13 11:43:18,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:43:18,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1252 transitions. [2022-12-13 11:43:18,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:43:18,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:43:18,073 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:43:18,073 INFO L175 Difference]: Start difference. First operand has 131 places, 168 transitions, 1546 flow. Second operand 4 states and 1252 transitions. [2022-12-13 11:43:18,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 160 transitions, 1798 flow [2022-12-13 11:43:21,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 160 transitions, 1786 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-12-13 11:43:21,710 INFO L231 Difference]: Finished difference. Result has 130 places, 160 transitions, 1524 flow [2022-12-13 11:43:21,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1524, PETRI_PLACES=130, PETRI_TRANSITIONS=160} [2022-12-13 11:43:21,710 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 56 predicate places. [2022-12-13 11:43:21,710 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 160 transitions, 1524 flow [2022-12-13 11:43:21,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:43:21,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:43:21,711 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:43:21,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:43:21,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:43:21,912 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:43:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:43:21,913 INFO L85 PathProgramCache]: Analyzing trace with hash 626768679, now seen corresponding path program 1 times [2022-12-13 11:43:21,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:43:21,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400376555] [2022-12-13 11:43:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:43:21,915 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 11:43:21,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:43:21,918 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:43:21,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:43:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:43:22,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:43:22,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:43:22,150 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 11:43:22,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 11:43:22,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:43:22,239 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 11:43:22,256 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:43:22,256 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 11:43:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:43:22,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:43:24,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:43:24,746 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 55 treesize of output 62 [2022-12-13 11:43:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:43:24,918 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:43:24,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400376555] [2022-12-13 11:43:24,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400376555] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:43:24,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:43:24,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:43:24,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516796561] [2022-12-13 11:43:24,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:43:24,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:43:24,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:43:24,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:43:24,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:43:33,959 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 766 [2022-12-13 11:43:33,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 160 transitions, 1524 flow. Second operand has 10 states, 10 states have (on average 281.6) internal successors, (2816), 10 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:43:33,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:43:33,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 766 [2022-12-13 11:43:33,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:44:20,943 INFO L130 PetriNetUnfolder]: 199564/284576 cut-off events. [2022-12-13 11:44:20,944 INFO L131 PetriNetUnfolder]: For 436712/436712 co-relation queries the response was YES. [2022-12-13 11:44:22,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861762 conditions, 284576 events. 199564/284576 cut-off events. For 436712/436712 co-relation queries the response was YES. Maximal size of possible extension queue 9112. Compared 2243851 event pairs, 127604 based on Foata normal form. 116/183728 useless extension candidates. Maximal degree in co-relation 861708. Up to 51417 conditions per place. [2022-12-13 11:44:23,630 INFO L137 encePairwiseOnDemand]: 752/766 looper letters, 721 selfloop transitions, 158 changer transitions 0/879 dead transitions. [2022-12-13 11:44:23,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 879 transitions, 7383 flow [2022-12-13 11:44:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 11:44:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 11:44:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 7142 transitions. [2022-12-13 11:44:23,640 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40538086048359634 [2022-12-13 11:44:23,640 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 7142 transitions. [2022-12-13 11:44:23,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 7142 transitions. [2022-12-13 11:44:23,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:44:23,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 7142 transitions. [2022-12-13 11:44:23,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 310.5217391304348) internal successors, (7142), 23 states have internal predecessors, (7142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:44:23,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 766.0) internal successors, (18384), 24 states have internal predecessors, (18384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:44:23,661 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 766.0) internal successors, (18384), 24 states have internal predecessors, (18384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:44:23,661 INFO L175 Difference]: Start difference. First operand has 130 places, 160 transitions, 1524 flow. Second operand 23 states and 7142 transitions. [2022-12-13 11:44:23,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 879 transitions, 7383 flow [2022-12-13 11:44:29,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 879 transitions, 7353 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:44:29,046 INFO L231 Difference]: Finished difference. Result has 166 places, 231 transitions, 2792 flow [2022-12-13 11:44:29,046 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2792, PETRI_PLACES=166, PETRI_TRANSITIONS=231} [2022-12-13 11:44:29,047 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 92 predicate places. [2022-12-13 11:44:29,047 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 231 transitions, 2792 flow [2022-12-13 11:44:29,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 281.6) internal successors, (2816), 10 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:44:29,047 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:29,047 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:44:29,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-13 11:44:29,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:44:29,248 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:44:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash -441057536, now seen corresponding path program 1 times [2022-12-13 11:44:29,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:44:29,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850434777] [2022-12-13 11:44:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:29,252 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 11:44:29,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:44:29,255 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:44:29,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:44:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:29,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:44:29,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:29,467 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 11:44:29,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:44:29,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:44:29,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850434777] [2022-12-13 11:44:29,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850434777] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:44:29,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:44:29,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:44:29,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797366247] [2022-12-13 11:44:29,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:44:29,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:44:29,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:44:29,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:44:29,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:44:29,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 766 [2022-12-13 11:44:29,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 231 transitions, 2792 flow. Second operand has 5 states, 5 states have (on average 308.8) internal successors, (1544), 5 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:44:29,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:44:29,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 766 [2022-12-13 11:44:29,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:09,789 INFO L130 PetriNetUnfolder]: 179123/256183 cut-off events. [2022-12-13 11:45:09,789 INFO L131 PetriNetUnfolder]: For 848661/848661 co-relation queries the response was YES. [2022-12-13 11:45:11,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854362 conditions, 256183 events. 179123/256183 cut-off events. For 848661/848661 co-relation queries the response was YES. Maximal size of possible extension queue 8340. Compared 2013697 event pairs, 67008 based on Foata normal form. 776/170053 useless extension candidates. Maximal degree in co-relation 854292. Up to 126808 conditions per place. [2022-12-13 11:45:12,343 INFO L137 encePairwiseOnDemand]: 754/766 looper letters, 303 selfloop transitions, 41 changer transitions 0/344 dead transitions. [2022-12-13 11:45:12,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 344 transitions, 4474 flow [2022-12-13 11:45:12,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:45:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:45:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1668 transitions. [2022-12-13 11:45:12,347 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43550913838120103 [2022-12-13 11:45:12,347 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1668 transitions. [2022-12-13 11:45:12,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1668 transitions. [2022-12-13 11:45:12,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:12,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1668 transitions. [2022-12-13 11:45:12,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 333.6) internal successors, (1668), 5 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:12,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 766.0) internal successors, (4596), 6 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:12,352 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 766.0) internal successors, (4596), 6 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:12,352 INFO L175 Difference]: Start difference. First operand has 166 places, 231 transitions, 2792 flow. Second operand 5 states and 1668 transitions. [2022-12-13 11:45:12,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 344 transitions, 4474 flow [2022-12-13 11:45:20,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 344 transitions, 4241 flow, removed 34 selfloop flow, removed 4 redundant places. [2022-12-13 11:45:20,175 INFO L231 Difference]: Finished difference. Result has 168 places, 234 transitions, 2737 flow [2022-12-13 11:45:20,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2737, PETRI_PLACES=168, PETRI_TRANSITIONS=234} [2022-12-13 11:45:20,175 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 94 predicate places. [2022-12-13 11:45:20,176 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 234 transitions, 2737 flow [2022-12-13 11:45:20,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 308.8) internal successors, (1544), 5 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:20,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:20,176 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:20,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 11:45:20,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:45:20,377 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:45:20,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:20,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1716762981, now seen corresponding path program 1 times [2022-12-13 11:45:20,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:45:20,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285661189] [2022-12-13 11:45:20,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:20,380 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 11:45:20,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:45:20,382 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:45:20,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:45:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:20,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:45:20,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:20,554 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 11:45:20,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:45:20,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:45:20,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285661189] [2022-12-13 11:45:20,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285661189] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:45:20,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:45:20,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:45:20,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119018127] [2022-12-13 11:45:20,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:45:20,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:45:20,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:45:20,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:45:20,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:45:20,907 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 766 [2022-12-13 11:45:20,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 234 transitions, 2737 flow. Second operand has 4 states, 4 states have (on average 310.5) internal successors, (1242), 4 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:20,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:20,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 766 [2022-12-13 11:45:20,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:58,679 INFO L130 PetriNetUnfolder]: 159415/227644 cut-off events. [2022-12-13 11:45:58,679 INFO L131 PetriNetUnfolder]: For 850287/850287 co-relation queries the response was YES. [2022-12-13 11:46:00,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 819244 conditions, 227644 events. 159415/227644 cut-off events. For 850287/850287 co-relation queries the response was YES. Maximal size of possible extension queue 7499. Compared 1781580 event pairs, 117362 based on Foata normal form. 1909/154763 useless extension candidates. Maximal degree in co-relation 819173. Up to 215370 conditions per place. [2022-12-13 11:46:01,078 INFO L137 encePairwiseOnDemand]: 753/766 looper letters, 294 selfloop transitions, 3 changer transitions 3/300 dead transitions. [2022-12-13 11:46:01,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 300 transitions, 3937 flow [2022-12-13 11:46:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:46:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:46:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1325 transitions. [2022-12-13 11:46:01,081 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4324412532637076 [2022-12-13 11:46:01,081 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1325 transitions. [2022-12-13 11:46:01,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1325 transitions. [2022-12-13 11:46:01,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:46:01,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1325 transitions. [2022-12-13 11:46:01,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 331.25) internal successors, (1325), 4 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:01,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:01,085 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:01,085 INFO L175 Difference]: Start difference. First operand has 168 places, 234 transitions, 2737 flow. Second operand 4 states and 1325 transitions. [2022-12-13 11:46:01,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 300 transitions, 3937 flow [2022-12-13 11:46:09,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 300 transitions, 3894 flow, removed 20 selfloop flow, removed 1 redundant places. [2022-12-13 11:46:09,302 INFO L231 Difference]: Finished difference. Result has 171 places, 233 transitions, 2725 flow [2022-12-13 11:46:09,303 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=2707, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2725, PETRI_PLACES=171, PETRI_TRANSITIONS=233} [2022-12-13 11:46:09,303 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 97 predicate places. [2022-12-13 11:46:09,303 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 233 transitions, 2725 flow [2022-12-13 11:46:09,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 310.5) internal successors, (1242), 4 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:09,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:46:09,303 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:46:09,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 11:46:09,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:46:09,504 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:46:09,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:46:09,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1029199992, now seen corresponding path program 1 times [2022-12-13 11:46:09,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:46:09,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101101379] [2022-12-13 11:46:09,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:46:09,507 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 11:46:09,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:46:09,510 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:46:09,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:46:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:46:09,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:46:09,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:46:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:46:09,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:46:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:46:09,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:46:09,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101101379] [2022-12-13 11:46:09,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101101379] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:46:09,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:46:09,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:46:09,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701893270] [2022-12-13 11:46:09,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:46:09,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:46:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:46:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:46:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:46:11,887 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 766 [2022-12-13 11:46:11,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 233 transitions, 2725 flow. Second operand has 10 states, 10 states have (on average 303.0) internal successors, (3030), 10 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:11,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:46:11,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 766 [2022-12-13 11:46:11,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:46:51,572 INFO L130 PetriNetUnfolder]: 163164/233569 cut-off events. [2022-12-13 11:46:51,572 INFO L131 PetriNetUnfolder]: For 857420/857420 co-relation queries the response was YES. [2022-12-13 11:46:52,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869904 conditions, 233569 events. 163164/233569 cut-off events. For 857420/857420 co-relation queries the response was YES. Maximal size of possible extension queue 7807. Compared 1840350 event pairs, 93799 based on Foata normal form. 2640/169125 useless extension candidates. Maximal degree in co-relation 869831. Up to 117732 conditions per place. [2022-12-13 11:46:53,770 INFO L137 encePairwiseOnDemand]: 750/766 looper letters, 358 selfloop transitions, 62 changer transitions 2/422 dead transitions. [2022-12-13 11:46:53,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 422 transitions, 4846 flow [2022-12-13 11:46:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 11:46:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 11:46:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3518 transitions. [2022-12-13 11:46:53,777 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41751720863992403 [2022-12-13 11:46:53,777 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3518 transitions. [2022-12-13 11:46:53,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3518 transitions. [2022-12-13 11:46:53,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:46:53,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3518 transitions. [2022-12-13 11:46:53,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 319.8181818181818) internal successors, (3518), 11 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:53,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 766.0) internal successors, (9192), 12 states have internal predecessors, (9192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:53,789 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 766.0) internal successors, (9192), 12 states have internal predecessors, (9192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:53,789 INFO L175 Difference]: Start difference. First operand has 171 places, 233 transitions, 2725 flow. Second operand 11 states and 3518 transitions. [2022-12-13 11:46:53,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 422 transitions, 4846 flow [2022-12-13 11:47:02,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 422 transitions, 4841 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:47:02,951 INFO L231 Difference]: Finished difference. Result has 181 places, 247 transitions, 3160 flow [2022-12-13 11:47:02,951 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=2710, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3160, PETRI_PLACES=181, PETRI_TRANSITIONS=247} [2022-12-13 11:47:02,952 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 107 predicate places. [2022-12-13 11:47:02,952 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 247 transitions, 3160 flow [2022-12-13 11:47:02,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 303.0) internal successors, (3030), 10 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:02,952 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:47:02,952 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:47:02,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:47:03,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:47:03,153 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:47:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:47:03,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1389640465, now seen corresponding path program 1 times [2022-12-13 11:47:03,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:47:03,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052000173] [2022-12-13 11:47:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:03,156 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 11:47:03,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:47:03,159 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:47:03,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:47:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:03,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 11:47:03,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:47:03,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 11:47:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:47:03,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:47:03,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:47:03,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052000173] [2022-12-13 11:47:03,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052000173] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:47:03,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:47:03,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:47:03,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666441472] [2022-12-13 11:47:03,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:47:03,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:47:03,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:47:03,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:47:03,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:47:03,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 766 [2022-12-13 11:47:03,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 247 transitions, 3160 flow. Second operand has 4 states, 4 states have (on average 301.5) internal successors, (1206), 4 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:03,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:47:03,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 766 [2022-12-13 11:47:03,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:47:30,875 INFO L130 PetriNetUnfolder]: 117768/169127 cut-off events. [2022-12-13 11:47:30,875 INFO L131 PetriNetUnfolder]: For 704852/704852 co-relation queries the response was YES. [2022-12-13 11:47:32,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641595 conditions, 169127 events. 117768/169127 cut-off events. For 704852/704852 co-relation queries the response was YES. Maximal size of possible extension queue 5377. Compared 1262626 event pairs, 84517 based on Foata normal form. 204/130125 useless extension candidates. Maximal degree in co-relation 641520. Up to 168863 conditions per place. [2022-12-13 11:47:32,820 INFO L137 encePairwiseOnDemand]: 760/766 looper letters, 198 selfloop transitions, 44 changer transitions 0/242 dead transitions. [2022-12-13 11:47:32,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 242 transitions, 3614 flow [2022-12-13 11:47:32,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:47:32,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:47:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1248 transitions. [2022-12-13 11:47:32,823 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4073107049608355 [2022-12-13 11:47:32,823 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1248 transitions. [2022-12-13 11:47:32,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1248 transitions. [2022-12-13 11:47:32,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:47:32,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1248 transitions. [2022-12-13 11:47:32,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 312.0) internal successors, (1248), 4 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 11:47:32,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:32,828 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 766.0) internal successors, (3830), 5 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:32,828 INFO L175 Difference]: Start difference. First operand has 181 places, 247 transitions, 3160 flow. Second operand 4 states and 1248 transitions. [2022-12-13 11:47:32,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 242 transitions, 3614 flow [2022-12-13 11:47:39,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 242 transitions, 3596 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 11:47:39,622 INFO L231 Difference]: Finished difference. Result has 178 places, 242 transitions, 3200 flow [2022-12-13 11:47:39,622 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=3112, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3200, PETRI_PLACES=178, PETRI_TRANSITIONS=242} [2022-12-13 11:47:39,622 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 104 predicate places. [2022-12-13 11:47:39,622 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 242 transitions, 3200 flow [2022-12-13 11:47:39,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 301.5) internal successors, (1206), 4 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:39,623 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:47:39,623 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:47:39,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 11:47:39,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:47:39,824 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:47:39,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:47:39,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1389640515, now seen corresponding path program 1 times [2022-12-13 11:47:39,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:47:39,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139656841] [2022-12-13 11:47:39,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:39,827 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 11:47:39,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:47:39,831 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:47:39,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 11:47:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:40,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 11:47:40,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:47:40,063 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 11:47:40,150 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 11:47:40,150 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 16 treesize of output 22 [2022-12-13 11:47:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:40,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:47:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:41,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:47:41,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139656841] [2022-12-13 11:47:41,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139656841] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:47:41,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:47:41,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 11:47:41,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542007180] [2022-12-13 11:47:41,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:47:41,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:47:41,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:47:41,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:47:41,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:47:52,053 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 766 [2022-12-13 11:47:52,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 242 transitions, 3200 flow. Second operand has 14 states, 14 states have (on average 282.42857142857144) internal successors, (3954), 14 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:47:52,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:47:52,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 766 [2022-12-13 11:47:52,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:48:35,018 INFO L130 PetriNetUnfolder]: 135693/199143 cut-off events. [2022-12-13 11:48:35,018 INFO L131 PetriNetUnfolder]: For 856335/856335 co-relation queries the response was YES. [2022-12-13 11:48:36,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757063 conditions, 199143 events. 135693/199143 cut-off events. For 856335/856335 co-relation queries the response was YES. Maximal size of possible extension queue 6604. Compared 1626403 event pairs, 43694 based on Foata normal form. 0/154092 useless extension candidates. Maximal degree in co-relation 756987. Up to 50523 conditions per place. [2022-12-13 11:48:37,228 INFO L137 encePairwiseOnDemand]: 748/766 looper letters, 598 selfloop transitions, 175 changer transitions 0/773 dead transitions. [2022-12-13 11:48:37,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 773 transitions, 10009 flow [2022-12-13 11:48:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 11:48:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 11:48:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 6926 transitions. [2022-12-13 11:48:37,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39312067203995915 [2022-12-13 11:48:37,236 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 6926 transitions. [2022-12-13 11:48:37,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 6926 transitions. [2022-12-13 11:48:37,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:48:37,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 6926 transitions. [2022-12-13 11:48:37,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 301.1304347826087) internal successors, (6926), 23 states have internal predecessors, (6926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:37,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 766.0) internal successors, (18384), 24 states have internal predecessors, (18384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:37,253 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 766.0) internal successors, (18384), 24 states have internal predecessors, (18384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:37,253 INFO L175 Difference]: Start difference. First operand has 178 places, 242 transitions, 3200 flow. Second operand 23 states and 6926 transitions. [2022-12-13 11:48:37,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 773 transitions, 10009 flow [2022-12-13 11:48:45,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 773 transitions, 9944 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:48:45,441 INFO L231 Difference]: Finished difference. Result has 209 places, 275 transitions, 4049 flow [2022-12-13 11:48:45,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=3155, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4049, PETRI_PLACES=209, PETRI_TRANSITIONS=275} [2022-12-13 11:48:45,441 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 135 predicate places. [2022-12-13 11:48:45,441 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 275 transitions, 4049 flow [2022-12-13 11:48:45,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 282.42857142857144) internal successors, (3954), 14 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:45,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:48:45,442 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:48:45,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-13 11:48:45,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:48:45,644 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:48:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:48:45,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1389640466, now seen corresponding path program 1 times [2022-12-13 11:48:45,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:48:45,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662560209] [2022-12-13 11:48:45,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:48:45,647 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 11:48:45,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:48:45,650 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:48:45,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 11:48:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:48:45,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:48:45,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:48:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:48:45,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:48:46,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-12-13 11:48:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:48:46,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:48:46,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662560209] [2022-12-13 11:48:46,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662560209] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:48:46,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:48:46,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:48:46,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879484899] [2022-12-13 11:48:46,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:48:46,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:48:46,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:48:46,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:48:46,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:48:49,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 766 [2022-12-13 11:48:49,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 275 transitions, 4049 flow. Second operand has 10 states, 10 states have (on average 297.0) internal successors, (2970), 10 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:48:49,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:48:49,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 766 [2022-12-13 11:48:49,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:49:24,615 INFO L130 PetriNetUnfolder]: 123473/182097 cut-off events. [2022-12-13 11:49:24,615 INFO L131 PetriNetUnfolder]: For 1044591/1044591 co-relation queries the response was YES. [2022-12-13 11:49:26,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774674 conditions, 182097 events. 123473/182097 cut-off events. For 1044591/1044591 co-relation queries the response was YES. Maximal size of possible extension queue 6122. Compared 1479872 event pairs, 42710 based on Foata normal form. 294/153074 useless extension candidates. Maximal degree in co-relation 774587. Up to 79678 conditions per place. [2022-12-13 11:49:26,917 INFO L137 encePairwiseOnDemand]: 755/766 looper letters, 353 selfloop transitions, 120 changer transitions 0/473 dead transitions. [2022-12-13 11:49:26,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 473 transitions, 7185 flow [2022-12-13 11:49:26,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:49:26,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:49:26,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2552 transitions. [2022-12-13 11:49:26,923 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4164490861618799 [2022-12-13 11:49:26,923 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2552 transitions. [2022-12-13 11:49:26,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2552 transitions. [2022-12-13 11:49:26,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:49:26,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2552 transitions. [2022-12-13 11:49:26,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 319.0) internal successors, (2552), 8 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:26,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 766.0) internal successors, (6894), 9 states have internal predecessors, (6894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:26,930 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 766.0) internal successors, (6894), 9 states have internal predecessors, (6894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:26,930 INFO L175 Difference]: Start difference. First operand has 209 places, 275 transitions, 4049 flow. Second operand 8 states and 2552 transitions. [2022-12-13 11:49:26,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 473 transitions, 7185 flow [2022-12-13 11:49:45,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 473 transitions, 6726 flow, removed 66 selfloop flow, removed 11 redundant places. [2022-12-13 11:49:45,637 INFO L231 Difference]: Finished difference. Result has 206 places, 268 transitions, 3752 flow [2022-12-13 11:49:45,637 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=3502, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3752, PETRI_PLACES=206, PETRI_TRANSITIONS=268} [2022-12-13 11:49:45,637 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 132 predicate places. [2022-12-13 11:49:45,637 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 268 transitions, 3752 flow [2022-12-13 11:49:45,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 297.0) internal successors, (2970), 10 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:49:45,638 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:45,638 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1] [2022-12-13 11:49:45,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-12-13 11:49:45,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:49:45,839 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-12-13 11:49:45,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 846622892, now seen corresponding path program 1 times [2022-12-13 11:49:45,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:49:45,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448244890] [2022-12-13 11:49:45,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:45,842 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 11:49:45,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:49:45,845 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -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 11:49:45,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dbac435-41dc-4626-866b-4a81e0569d6a/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 11:49:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:45,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:49:45,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:45,968 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 11:49:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:46,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:49:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:48,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:49:48,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448244890] [2022-12-13 11:49:48,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448244890] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:49:48,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:49:48,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-12-13 11:49:48,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728023948] [2022-12-13 11:49:48,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:49:48,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:49:48,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:49:48,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:49:48,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306