./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array.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_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/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_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/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_15d34369-2ede-4078-99ea-6c7e0cfc7730/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 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 --- 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 19:12:53,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:12:53,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:12:53,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:12:53,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:12:53,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:12:53,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:12:53,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:12:53,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:12:53,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:12:53,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:12:53,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:12:53,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:12:53,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:12:53,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:12:53,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:12:53,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:12:53,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:12:53,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:12:53,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:12:53,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:12:53,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:12:53,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:12:53,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:12:53,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:12:53,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:12:53,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:12:53,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:12:53,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:12:53,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:12:53,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:12:53,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:12:53,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:12:53,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:12:53,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:12:53,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:12:53,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:12:53,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:12:53,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:12:53,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:12:53,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:12:53,312 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 19:12:53,327 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:12:53,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:12:53,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:12:53,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:12:53,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:12:53,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:12:53,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:12:53,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:12:53,329 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:12:53,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:12:53,329 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:12:53,329 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:12:53,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:12:53,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:12:53,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:12:53,330 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:12:53,330 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:12:53,330 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:12:53,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:12:53,331 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:12:53,331 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:12:53,331 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:12:53,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:12:53,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:12:53,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:12:53,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:12:53,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:12:53,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:12:53,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:12:53,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:12:53,333 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:12:53,333 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:12:53,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:12:53,333 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:12:53,333 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_15d34369-2ede-4078-99ea-6c7e0cfc7730/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2022-12-13 19:12:53,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:12:53,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:12:53,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:12:53,530 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:12:53,531 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:12:53,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-12-13 19:12:56,118 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:12:56,251 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:12:56,251 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-12-13 19:12:56,256 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/data/cd94f9c49/37876bc600e14ac4a6556609ac2a18bf/FLAG704b45e1d [2022-12-13 19:12:56,266 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/data/cd94f9c49/37876bc600e14ac4a6556609ac2a18bf [2022-12-13 19:12:56,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:12:56,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:12:56,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:12:56,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:12:56,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:12:56,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:12:56" (1/1) ... [2022-12-13 19:12:56,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7510e21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:56, skipping insertion in model container [2022-12-13 19:12:56,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:12:56" (1/1) ... [2022-12-13 19:12:56,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:12:56,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:12:56,404 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:12:56,405 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:12:56,407 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:12:56,408 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:12:56,409 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:12:56,410 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:12:56,415 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_15d34369-2ede-4078-99ea-6c7e0cfc7730/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-12-13 19:12:56,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:12:56,431 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 19:12:56,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@53519727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:12:56, skipping insertion in model container [2022-12-13 19:12:56,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:12:56,432 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 19:12:56,433 INFO L158 Benchmark]: Toolchain (without parser) took 162.83ms. Allocated memory is still 121.6MB. Free memory was 73.2MB in the beginning and 63.0MB in the end (delta: 10.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-13 19:12:56,433 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 121.6MB. Free memory is still 94.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:12:56,434 INFO L158 Benchmark]: CACSL2BoogieTranslator took 160.60ms. Allocated memory is still 121.6MB. Free memory was 72.9MB in the beginning and 63.1MB in the end (delta: 9.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-13 19:12:56,443 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 121.6MB. Free memory is still 94.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 160.60ms. Allocated memory is still 121.6MB. Free memory was 72.9MB in the beginning and 63.1MB in the end (delta: 9.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: 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_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/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_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/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_15d34369-2ede-4078-99ea-6c7e0cfc7730/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 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 --- 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 19:12:57,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:12:57,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:12:57,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:12:57,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:12:57,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:12:57,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:12:57,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:12:57,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:12:57,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:12:57,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:12:57,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:12:57,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:12:57,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:12:57,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:12:57,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:12:57,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:12:57,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:12:57,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:12:57,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:12:57,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:12:57,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:12:57,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:12:57,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:12:57,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:12:57,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:12:57,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:12:57,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:12:57,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:12:57,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:12:57,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:12:57,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:12:57,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:12:57,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:12:57,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:12:57,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:12:57,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:12:57,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:12:57,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:12:57,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:12:57,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:12:57,859 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 19:12:57,874 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:12:57,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:12:57,875 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:12:57,875 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:12:57,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:12:57,876 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:12:57,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:12:57,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:12:57,876 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:12:57,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:12:57,877 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:12:57,877 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:12:57,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:12:57,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:12:57,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:12:57,877 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:12:57,877 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:12:57,877 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:12:57,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:12:57,878 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:12:57,878 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 19:12:57,878 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 19:12:57,878 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:12:57,878 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:12:57,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:12:57,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:12:57,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:12:57,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:12:57,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:12:57,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:12:57,879 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 19:12:57,883 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 19:12:57,883 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:12:57,884 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:12:57,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:12:57,884 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 19:12:57,884 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:12:57,884 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_15d34369-2ede-4078-99ea-6c7e0cfc7730/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2022-12-13 19:12:58,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:12:58,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:12:58,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:12:58,109 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:12:58,109 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:12:58,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-12-13 19:13:00,631 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:13:00,805 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:13:00,805 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-12-13 19:13:00,812 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/data/f9972a730/9508a607d62a4fb4a380acc7754c192d/FLAG2b9fda6c8 [2022-12-13 19:13:00,823 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/data/f9972a730/9508a607d62a4fb4a380acc7754c192d [2022-12-13 19:13:00,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:13:00,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:13:00,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:13:00,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:13:00,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:13:00,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:13:00" (1/1) ... [2022-12-13 19:13:00,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@116bd069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:13:00, skipping insertion in model container [2022-12-13 19:13:00,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:13:00" (1/1) ... [2022-12-13 19:13:00,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:13:00,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:13:00,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:13:00,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:13:00,968 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:13:00,969 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:13:00,970 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:13:00,971 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:13:00,976 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_15d34369-2ede-4078-99ea-6c7e0cfc7730/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-12-13 19:13:00,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:13:00,995 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 19:13:00,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:13:01,001 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:13:01,002 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:13:01,003 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:13:01,003 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:13:01,004 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:13:01,005 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:13:01,008 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_15d34369-2ede-4078-99ea-6c7e0cfc7730/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-12-13 19:13:01,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:13:01,014 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:13:01,025 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:13:01,026 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:13:01,027 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:13:01,027 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:13:01,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:13:01,029 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:13:01,032 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_15d34369-2ede-4078-99ea-6c7e0cfc7730/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-12-13 19:13:01,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:13:01,047 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:13:01,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:13:01 WrapperNode [2022-12-13 19:13:01,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:13:01,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:13:01,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:13:01,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:13:01,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:13:01" (1/1) ... [2022-12-13 19:13:01,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:13:01" (1/1) ... [2022-12-13 19:13:01,076 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 98 [2022-12-13 19:13:01,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:13:01,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:13:01,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:13:01,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:13:01,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:13:01" (1/1) ... [2022-12-13 19:13:01,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:13:01" (1/1) ... [2022-12-13 19:13:01,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:13:01" (1/1) ... [2022-12-13 19:13:01,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:13:01" (1/1) ... [2022-12-13 19:13:01,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:13:01" (1/1) ... [2022-12-13 19:13:01,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:13:01" (1/1) ... [2022-12-13 19:13:01,105 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:13:01" (1/1) ... [2022-12-13 19:13:01,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:13:01" (1/1) ... [2022-12-13 19:13:01,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:13:01,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:13:01,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:13:01,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:13:01,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:13:01" (1/1) ... [2022-12-13 19:13:01,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:13:01,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:13:01,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:13:01,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:13:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:13:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 19:13:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:13:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 19:13:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 19:13:01,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 19:13:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 19:13:01,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 19:13:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 19:13:01,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 19:13:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 19:13:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 19:13:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 19:13:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:13:01,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:13:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:13:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 19:13:01,173 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 19:13:01,281 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:13:01,283 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:13:01,725 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:13:01,786 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:13:01,786 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 19:13:01,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:13:01 BoogieIcfgContainer [2022-12-13 19:13:01,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:13:01,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:13:01,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:13:01,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:13:01,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:13:00" (1/3) ... [2022-12-13 19:13:01,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346cc9f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:13:01, skipping insertion in model container [2022-12-13 19:13:01,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:13:01" (2/3) ... [2022-12-13 19:13:01,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346cc9f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:13:01, skipping insertion in model container [2022-12-13 19:13:01,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:13:01" (3/3) ... [2022-12-13 19:13:01,793 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2022-12-13 19:13:01,806 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:13:01,807 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-13 19:13:01,807 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:13:01,856 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 19:13:01,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 180 transitions, 384 flow [2022-12-13 19:13:01,933 INFO L130 PetriNetUnfolder]: 12/177 cut-off events. [2022-12-13 19:13:01,933 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:13:01,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 177 events. 12/177 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2022-12-13 19:13:01,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 180 transitions, 384 flow [2022-12-13 19:13:01,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 172 transitions, 362 flow [2022-12-13 19:13:01,944 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:13:01,952 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 172 transitions, 362 flow [2022-12-13 19:13:01,954 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 172 transitions, 362 flow [2022-12-13 19:13:01,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 172 transitions, 362 flow [2022-12-13 19:13:01,983 INFO L130 PetriNetUnfolder]: 12/172 cut-off events. [2022-12-13 19:13:01,983 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:13:01,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 172 events. 12/172 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2022-12-13 19:13:01,985 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-12-13 19:13:21,740 INFO L134 LiptonReduction]: Checked pairs total: 3507 [2022-12-13 19:13:21,740 INFO L136 LiptonReduction]: Total number of compositions: 167 [2022-12-13 19:13:21,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:13:21,755 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;@7f040847, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:13:21,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-12-13 19:13:21,756 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 19:13:21,756 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:13:21,757 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:21,757 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:13:21,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:13:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:21,761 INFO L85 PathProgramCache]: Analyzing trace with hash 22860, now seen corresponding path program 1 times [2022-12-13 19:13:21,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:13:21,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788410393] [2022-12-13 19:13:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:21,770 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 19:13:21,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:13:21,771 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:21,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:21,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:13:21,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:21,965 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 19:13:21,966 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 19:13:21,992 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 19:13:21,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:13:21,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:13:21,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788410393] [2022-12-13 19:13:21,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788410393] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:13:21,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:13:21,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:13:21,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51392976] [2022-12-13 19:13:21,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:13:22,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:13:22,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:13:22,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:13:22,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:13:22,120 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 347 [2022-12-13 19:13:22,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:22,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:22,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 347 [2022-12-13 19:13:22,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:13:22,584 INFO L130 PetriNetUnfolder]: 2707/3454 cut-off events. [2022-12-13 19:13:22,584 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2022-12-13 19:13:22,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6975 conditions, 3454 events. 2707/3454 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 13961 event pairs, 1291 based on Foata normal form. 0/973 useless extension candidates. Maximal degree in co-relation 5975. Up to 3423 conditions per place. [2022-12-13 19:13:22,600 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2022-12-13 19:13:22,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 184 flow [2022-12-13 19:13:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:13:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:13:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2022-12-13 19:13:22,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4755043227665706 [2022-12-13 19:13:22,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2022-12-13 19:13:22,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2022-12-13 19:13:22,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:13:22,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2022-12-13 19:13:22,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:22,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:22,622 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:22,623 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 120 flow. Second operand 3 states and 495 transitions. [2022-12-13 19:13:22,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 184 flow [2022-12-13 19:13:22,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 19:13:22,630 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2022-12-13 19:13:22,631 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2022-12-13 19:13:22,634 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -12 predicate places. [2022-12-13 19:13:22,634 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2022-12-13 19:13:22,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:22,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:22,634 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:13:22,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:22,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:22,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:13:22,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:22,838 INFO L85 PathProgramCache]: Analyzing trace with hash 23008, now seen corresponding path program 1 times [2022-12-13 19:13:22,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:13:22,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808855563] [2022-12-13 19:13:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:22,840 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 19:13:22,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:13:22,844 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:22,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:23,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:13:23,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:23,081 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 19:13:23,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:13:23,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:13:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808855563] [2022-12-13 19:13:23,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808855563] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:13:23,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:13:23,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:13:23,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686632223] [2022-12-13 19:13:23,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:13:23,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:13:23,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:13:23,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:13:23,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:13:23,135 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 347 [2022-12-13 19:13:23,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:23,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:23,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 347 [2022-12-13 19:13:23,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:13:23,530 INFO L130 PetriNetUnfolder]: 2707/3456 cut-off events. [2022-12-13 19:13:23,530 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 19:13:23,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6916 conditions, 3456 events. 2707/3456 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 14005 event pairs, 1291 based on Foata normal form. 0/974 useless extension candidates. Maximal degree in co-relation 6910. Up to 3424 conditions per place. [2022-12-13 19:13:23,544 INFO L137 encePairwiseOnDemand]: 342/347 looper letters, 40 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2022-12-13 19:13:23,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 182 flow [2022-12-13 19:13:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:13:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:13:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2022-12-13 19:13:23,548 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4783861671469741 [2022-12-13 19:13:23,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2022-12-13 19:13:23,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2022-12-13 19:13:23,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:13:23,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2022-12-13 19:13:23,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:23,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:23,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:23,554 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 498 transitions. [2022-12-13 19:13:23,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 182 flow [2022-12-13 19:13:23,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:13:23,561 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 109 flow [2022-12-13 19:13:23,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2022-12-13 19:13:23,562 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2022-12-13 19:13:23,562 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 109 flow [2022-12-13 19:13:23,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:23,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:23,562 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:13:23,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:23,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:23,764 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:13:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:23,764 INFO L85 PathProgramCache]: Analyzing trace with hash 22861, now seen corresponding path program 1 times [2022-12-13 19:13:23,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:13:23,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276573096] [2022-12-13 19:13:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:23,765 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 19:13:23,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:13:23,766 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:23,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:23,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:13:23,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:23,886 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:13:23,886 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 19:13:23,909 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 19:13:23,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:13:23,910 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:13:23,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276573096] [2022-12-13 19:13:23,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276573096] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:13:23,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:13:23,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:13:23,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545847921] [2022-12-13 19:13:23,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:13:23,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:13:23,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:13:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:13:23,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:13:24,060 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 347 [2022-12-13 19:13:24,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:24,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:24,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 347 [2022-12-13 19:13:24,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:13:24,590 INFO L130 PetriNetUnfolder]: 2707/3455 cut-off events. [2022-12-13 19:13:24,591 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 19:13:24,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6922 conditions, 3455 events. 2707/3455 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 13956 event pairs, 1291 based on Foata normal form. 1/976 useless extension candidates. Maximal degree in co-relation 6914. Up to 3424 conditions per place. [2022-12-13 19:13:24,608 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 39 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2022-12-13 19:13:24,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 191 flow [2022-12-13 19:13:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:13:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:13:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2022-12-13 19:13:24,611 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4697406340057637 [2022-12-13 19:13:24,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2022-12-13 19:13:24,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2022-12-13 19:13:24,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:13:24,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2022-12-13 19:13:24,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:24,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:24,615 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:24,615 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 109 flow. Second operand 3 states and 489 transitions. [2022-12-13 19:13:24,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 191 flow [2022-12-13 19:13:24,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 187 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 19:13:24,616 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 113 flow [2022-12-13 19:13:24,616 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2022-12-13 19:13:24,617 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2022-12-13 19:13:24,617 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 113 flow [2022-12-13 19:13:24,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:24,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:24,618 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:13:24,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 19:13:24,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:24,818 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:13:24,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:24,819 INFO L85 PathProgramCache]: Analyzing trace with hash 712975, now seen corresponding path program 1 times [2022-12-13 19:13:24,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:13:24,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903915574] [2022-12-13 19:13:24,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:24,820 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 19:13:24,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:13:24,821 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:24,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:24,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 19:13:24,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:24,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:13:24,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:13:24,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:13:25,002 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-13 19:13:25,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-12-13 19:13:25,030 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 19:13:25,030 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 19:13:25,095 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 19:13:25,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:13:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:13:25,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:13:25,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903915574] [2022-12-13 19:13:25,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903915574] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:13:25,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:13:25,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-12-13 19:13:25,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13205083] [2022-12-13 19:13:25,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:13:25,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:13:25,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:13:25,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:13:25,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:13:25,633 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 347 [2022-12-13 19:13:25,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 113 flow. Second operand has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:25,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:25,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 347 [2022-12-13 19:13:25,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:13:25,948 INFO L130 PetriNetUnfolder]: 2132/2754 cut-off events. [2022-12-13 19:13:25,948 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 19:13:25,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5522 conditions, 2754 events. 2132/2754 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 11063 event pairs, 1016 based on Foata normal form. 0/825 useless extension candidates. Maximal degree in co-relation 5512. Up to 2723 conditions per place. [2022-12-13 19:13:25,959 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-12-13 19:13:25,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 42 transitions, 185 flow [2022-12-13 19:13:25,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:13:25,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:13:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2022-12-13 19:13:25,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4447646493756004 [2022-12-13 19:13:25,961 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2022-12-13 19:13:25,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2022-12-13 19:13:25,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:13:25,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2022-12-13 19:13:25,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:25,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:25,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:25,963 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 113 flow. Second operand 3 states and 463 transitions. [2022-12-13 19:13:25,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 42 transitions, 185 flow [2022-12-13 19:13:25,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:13:25,964 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 105 flow [2022-12-13 19:13:25,964 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-12-13 19:13:25,965 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2022-12-13 19:13:25,965 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 105 flow [2022-12-13 19:13:25,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:25,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:25,965 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:13:25,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:26,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:26,166 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:13:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash 712974, now seen corresponding path program 1 times [2022-12-13 19:13:26,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:13:26,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135587579] [2022-12-13 19:13:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:26,168 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 19:13:26,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:13:26,170 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:26,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:26,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:13:26,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:26,333 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-12-13 19:13:26,333 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 6 case distinctions, treesize of input 38 treesize of output 51 [2022-12-13 19:13:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:13:26,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:13:26,380 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:13:26,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135587579] [2022-12-13 19:13:26,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135587579] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:13:26,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:13:26,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:13:26,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985305529] [2022-12-13 19:13:26,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:13:26,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:13:26,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:13:26,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:13:26,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:13:26,510 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 347 [2022-12-13 19:13:26,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:26,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:26,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 347 [2022-12-13 19:13:26,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:13:26,767 INFO L130 PetriNetUnfolder]: 1557/2053 cut-off events. [2022-12-13 19:13:26,767 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 19:13:26,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4118 conditions, 2053 events. 1557/2053 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8183 event pairs, 741 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 4108. Up to 2022 conditions per place. [2022-12-13 19:13:26,775 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-12-13 19:13:26,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 173 flow [2022-12-13 19:13:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:13:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:13:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2022-12-13 19:13:26,777 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4658981748318924 [2022-12-13 19:13:26,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2022-12-13 19:13:26,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2022-12-13 19:13:26,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:13:26,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2022-12-13 19:13:26,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:26,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:26,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:26,780 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 105 flow. Second operand 3 states and 485 transitions. [2022-12-13 19:13:26,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 173 flow [2022-12-13 19:13:26,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:13:26,781 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 100 flow [2022-12-13 19:13:26,781 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2022-12-13 19:13:26,781 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2022-12-13 19:13:26,781 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 100 flow [2022-12-13 19:13:26,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:26,781 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:26,782 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:13:26,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:26,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:26,982 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:13:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:26,982 INFO L85 PathProgramCache]: Analyzing trace with hash 712828, now seen corresponding path program 1 times [2022-12-13 19:13:26,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:13:26,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478059996] [2022-12-13 19:13:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:26,983 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 19:13:26,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:13:26,984 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:26,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:27,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:13:27,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:27,139 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:13:27,139 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 19:13:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:13:27,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:13:27,377 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 19:13:27,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:13:27,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478059996] [2022-12-13 19:13:27,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478059996] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:13:27,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:13:27,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 19:13:27,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955276341] [2022-12-13 19:13:27,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:13:27,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:13:27,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:13:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:13:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:13:28,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 347 [2022-12-13 19:13:28,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:28,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:28,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 347 [2022-12-13 19:13:28,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:13:29,022 INFO L130 PetriNetUnfolder]: 3115/4107 cut-off events. [2022-12-13 19:13:29,022 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 19:13:29,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8233 conditions, 4107 events. 3115/4107 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 18502 event pairs, 1482 based on Foata normal form. 3/1352 useless extension candidates. Maximal degree in co-relation 8222. Up to 2021 conditions per place. [2022-12-13 19:13:29,034 INFO L137 encePairwiseOnDemand]: 343/347 looper letters, 68 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2022-12-13 19:13:29,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 78 transitions, 344 flow [2022-12-13 19:13:29,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:13:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:13:29,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 942 transitions. [2022-12-13 19:13:29,037 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45244956772334294 [2022-12-13 19:13:29,037 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 942 transitions. [2022-12-13 19:13:29,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 942 transitions. [2022-12-13 19:13:29,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:13:29,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 942 transitions. [2022-12-13 19:13:29,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:29,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:29,042 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:29,042 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 100 flow. Second operand 6 states and 942 transitions. [2022-12-13 19:13:29,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 78 transitions, 344 flow [2022-12-13 19:13:29,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 78 transitions, 343 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:13:29,043 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 157 flow [2022-12-13 19:13:29,043 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=157, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2022-12-13 19:13:29,043 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2022-12-13 19:13:29,043 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 157 flow [2022-12-13 19:13:29,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:29,044 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:29,044 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:13:29,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:29,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:29,245 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:13:29,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:29,246 INFO L85 PathProgramCache]: Analyzing trace with hash 685183747, now seen corresponding path program 1 times [2022-12-13 19:13:29,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:13:29,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244122934] [2022-12-13 19:13:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:29,247 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 19:13:29,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:13:29,249 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:29,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:29,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:13:29,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:29,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:13:29,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:13:29,532 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-13 19:13:29,532 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-12-13 19:13:29,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 19:13:29,731 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 19:13:29,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:13:29,914 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 19:13:29,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:13:29,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244122934] [2022-12-13 19:13:29,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244122934] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:13:29,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:13:29,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 19:13:29,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470252716] [2022-12-13 19:13:29,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:13:29,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:13:29,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:13:29,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:13:29,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:13:30,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 347 [2022-12-13 19:13:30,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 157 flow. Second operand has 8 states, 8 states have (on average 141.25) internal successors, (1130), 8 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:30,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:30,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 347 [2022-12-13 19:13:30,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:13:31,549 INFO L130 PetriNetUnfolder]: 2941/3873 cut-off events. [2022-12-13 19:13:31,549 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-12-13 19:13:31,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7789 conditions, 3873 events. 2941/3873 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 17193 event pairs, 1396 based on Foata normal form. 0/1309 useless extension candidates. Maximal degree in co-relation 7773. Up to 1908 conditions per place. [2022-12-13 19:13:31,560 INFO L137 encePairwiseOnDemand]: 343/347 looper letters, 68 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2022-12-13 19:13:31,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 369 flow [2022-12-13 19:13:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:13:31,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:13:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 771 transitions. [2022-12-13 19:13:31,562 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4443804034582133 [2022-12-13 19:13:31,562 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 771 transitions. [2022-12-13 19:13:31,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 771 transitions. [2022-12-13 19:13:31,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:13:31,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 771 transitions. [2022-12-13 19:13:31,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.2) internal successors, (771), 5 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:31,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:31,565 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:31,565 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 157 flow. Second operand 5 states and 771 transitions. [2022-12-13 19:13:31,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 369 flow [2022-12-13 19:13:31,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 357 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-13 19:13:31,567 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 147 flow [2022-12-13 19:13:31,567 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2022-12-13 19:13:31,567 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2022-12-13 19:13:31,567 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 147 flow [2022-12-13 19:13:31,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.25) internal successors, (1130), 8 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:31,568 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:31,568 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:13:31,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-12-13 19:13:31,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:31,768 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:13:31,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:31,769 INFO L85 PathProgramCache]: Analyzing trace with hash 685183746, now seen corresponding path program 1 times [2022-12-13 19:13:31,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:13:31,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149465068] [2022-12-13 19:13:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:31,769 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 19:13:31,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:13:31,770 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:31,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:31,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:13:31,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:31,901 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-12-13 19:13:31,901 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 4 case distinctions, treesize of input 29 treesize of output 44 [2022-12-13 19:13:31,927 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 19:13:31,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:13:31,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:13:31,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149465068] [2022-12-13 19:13:31,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149465068] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:13:31,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:13:31,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:13:31,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055258971] [2022-12-13 19:13:31,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:13:31,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:13:31,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:13:31,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:13:31,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:13:32,015 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 347 [2022-12-13 19:13:32,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:32,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:32,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 347 [2022-12-13 19:13:32,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:13:32,370 INFO L130 PetriNetUnfolder]: 2767/3639 cut-off events. [2022-12-13 19:13:32,370 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-12-13 19:13:32,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7319 conditions, 3639 events. 2767/3639 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 16103 event pairs, 1310 based on Foata normal form. 0/1265 useless extension candidates. Maximal degree in co-relation 7302. Up to 3577 conditions per place. [2022-12-13 19:13:32,380 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2022-12-13 19:13:32,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 41 transitions, 219 flow [2022-12-13 19:13:32,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:13:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:13:32,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2022-12-13 19:13:32,382 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45341018251681076 [2022-12-13 19:13:32,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2022-12-13 19:13:32,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2022-12-13 19:13:32,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:13:32,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2022-12-13 19:13:32,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:32,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:32,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:32,384 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 147 flow. Second operand 3 states and 472 transitions. [2022-12-13 19:13:32,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 41 transitions, 219 flow [2022-12-13 19:13:32,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 41 transitions, 214 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 19:13:32,385 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 140 flow [2022-12-13 19:13:32,386 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2022-12-13 19:13:32,386 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2022-12-13 19:13:32,386 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 140 flow [2022-12-13 19:13:32,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:32,387 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:32,387 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:13:32,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:32,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:32,588 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:13:32,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:32,588 INFO L85 PathProgramCache]: Analyzing trace with hash -234145784, now seen corresponding path program 1 times [2022-12-13 19:13:32,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:13:32,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756143428] [2022-12-13 19:13:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:32,588 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 19:13:32,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:13:32,589 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:32,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:32,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 19:13:32,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:32,702 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 19:13:32,702 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 19:13:32,716 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 19:13:32,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:13:32,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:13:32,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756143428] [2022-12-13 19:13:32,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756143428] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:13:32,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:13:32,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:13:32,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137437927] [2022-12-13 19:13:32,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:13:32,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:13:32,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:13:32,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:13:32,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:13:32,810 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 347 [2022-12-13 19:13:32,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:32,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:32,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 347 [2022-12-13 19:13:32,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:13:33,066 INFO L130 PetriNetUnfolder]: 1427/1935 cut-off events. [2022-12-13 19:13:33,066 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-12-13 19:13:33,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 1935 events. 1427/1935 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8045 event pairs, 662 based on Foata normal form. 0/827 useless extension candidates. Maximal degree in co-relation 3893. Up to 1886 conditions per place. [2022-12-13 19:13:33,074 INFO L137 encePairwiseOnDemand]: 342/347 looper letters, 31 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2022-12-13 19:13:33,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 38 transitions, 204 flow [2022-12-13 19:13:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:13:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:13:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2022-12-13 19:13:33,076 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43804034582132567 [2022-12-13 19:13:33,076 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2022-12-13 19:13:33,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2022-12-13 19:13:33,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:13:33,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2022-12-13 19:13:33,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:33,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:33,080 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:33,080 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 140 flow. Second operand 4 states and 608 transitions. [2022-12-13 19:13:33,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 38 transitions, 204 flow [2022-12-13 19:13:33,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 203 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:13:33,082 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 141 flow [2022-12-13 19:13:33,082 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2022-12-13 19:13:33,083 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -6 predicate places. [2022-12-13 19:13:33,083 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 141 flow [2022-12-13 19:13:33,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:33,083 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:33,083 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 19:13:33,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 19:13:33,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:33,284 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:13:33,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:33,284 INFO L85 PathProgramCache]: Analyzing trace with hash -234869491, now seen corresponding path program 2 times [2022-12-13 19:13:33,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:13:33,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947627753] [2022-12-13 19:13:33,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:13:33,285 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 19:13:33,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:13:33,286 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:33,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:33,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:13:33,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:13:33,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 19:13:33,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:33,435 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:13:33,435 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 19:13:33,578 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 19:13:33,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:13:34,131 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 19:13:34,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:13:34,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947627753] [2022-12-13 19:13:34,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947627753] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:13:34,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:13:34,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 19:13:34,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519962977] [2022-12-13 19:13:34,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:13:34,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:13:34,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:13:34,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:13:34,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:13:37,412 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 347 [2022-12-13 19:13:37,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 141 flow. Second operand has 12 states, 12 states have (on average 146.0) internal successors, (1752), 12 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:37,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:37,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 347 [2022-12-13 19:13:37,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:13:41,658 INFO L130 PetriNetUnfolder]: 6410/8681 cut-off events. [2022-12-13 19:13:41,659 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2022-12-13 19:13:41,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17431 conditions, 8681 events. 6410/8681 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 44368 event pairs, 2979 based on Foata normal form. 6/3701 useless extension candidates. Maximal degree in co-relation 17413. Up to 944 conditions per place. [2022-12-13 19:13:41,685 INFO L137 encePairwiseOnDemand]: 343/347 looper letters, 236 selfloop transitions, 12 changer transitions 0/251 dead transitions. [2022-12-13 19:13:41,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 251 transitions, 1167 flow [2022-12-13 19:13:41,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 19:13:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 19:13:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1994 transitions. [2022-12-13 19:13:41,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47886647454370795 [2022-12-13 19:13:41,689 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1994 transitions. [2022-12-13 19:13:41,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1994 transitions. [2022-12-13 19:13:41,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:13:41,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1994 transitions. [2022-12-13 19:13:41,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 166.16666666666666) internal successors, (1994), 12 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:41,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:41,695 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:41,695 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 141 flow. Second operand 12 states and 1994 transitions. [2022-12-13 19:13:41,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 251 transitions, 1167 flow [2022-12-13 19:13:41,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 251 transitions, 1155 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:13:41,698 INFO L231 Difference]: Finished difference. Result has 67 places, 45 transitions, 223 flow [2022-12-13 19:13:41,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=223, PETRI_PLACES=67, PETRI_TRANSITIONS=45} [2022-12-13 19:13:41,698 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2022-12-13 19:13:41,698 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 45 transitions, 223 flow [2022-12-13 19:13:41,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 146.0) internal successors, (1752), 12 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:41,699 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:41,699 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:13:41,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 19:13:41,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:41,902 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:13:41,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:41,903 INFO L85 PathProgramCache]: Analyzing trace with hash -234145783, now seen corresponding path program 1 times [2022-12-13 19:13:41,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:13:41,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894953758] [2022-12-13 19:13:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:41,905 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 19:13:41,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:13:41,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:41,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:42,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:13:42,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:42,161 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 19:13:42,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:13:42,317 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 25 treesize of output 21 [2022-12-13 19:13:42,371 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 19:13:42,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:13:42,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894953758] [2022-12-13 19:13:42,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894953758] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:13:42,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:13:42,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:13:42,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455131405] [2022-12-13 19:13:42,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:13:42,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:13:42,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:13:42,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:13:42,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:13:43,702 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 347 [2022-12-13 19:13:43,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 45 transitions, 223 flow. Second operand has 10 states, 10 states have (on average 143.2) internal successors, (1432), 10 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:43,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:43,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 347 [2022-12-13 19:13:43,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:13:45,420 INFO L130 PetriNetUnfolder]: 9569/13190 cut-off events. [2022-12-13 19:13:45,421 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-12-13 19:13:45,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26604 conditions, 13190 events. 9569/13190 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 74627 event pairs, 2340 based on Foata normal form. 0/6096 useless extension candidates. Maximal degree in co-relation 26579. Up to 6985 conditions per place. [2022-12-13 19:13:45,466 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 104 selfloop transitions, 12 changer transitions 0/118 dead transitions. [2022-12-13 19:13:45,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 118 transitions, 624 flow [2022-12-13 19:13:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:13:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 19:13:45,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1385 transitions. [2022-12-13 19:13:45,469 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4434838296509766 [2022-12-13 19:13:45,469 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1385 transitions. [2022-12-13 19:13:45,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1385 transitions. [2022-12-13 19:13:45,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:13:45,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1385 transitions. [2022-12-13 19:13:45,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 153.88888888888889) internal successors, (1385), 9 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:45,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 347.0) internal successors, (3470), 10 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:45,474 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 347.0) internal successors, (3470), 10 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:45,474 INFO L175 Difference]: Start difference. First operand has 67 places, 45 transitions, 223 flow. Second operand 9 states and 1385 transitions. [2022-12-13 19:13:45,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 118 transitions, 624 flow [2022-12-13 19:13:45,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 118 transitions, 611 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-12-13 19:13:45,476 INFO L231 Difference]: Finished difference. Result has 73 places, 49 transitions, 261 flow [2022-12-13 19:13:45,476 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=261, PETRI_PLACES=73, PETRI_TRANSITIONS=49} [2022-12-13 19:13:45,477 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2022-12-13 19:13:45,477 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 49 transitions, 261 flow [2022-12-13 19:13:45,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.2) internal successors, (1432), 10 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:45,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:45,477 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:13:45,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:45,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:45,678 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:13:45,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:45,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1331418322, now seen corresponding path program 1 times [2022-12-13 19:13:45,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:13:45,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748351426] [2022-12-13 19:13:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:45,681 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 19:13:45,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:13:45,684 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:45,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:45,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 19:13:45,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:45,828 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:13:45,828 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 19:13:45,934 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 19:13:45,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:13:46,241 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 19:13:46,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:13:46,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748351426] [2022-12-13 19:13:46,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748351426] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:13:46,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:13:46,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:13:46,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083327919] [2022-12-13 19:13:46,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:13:46,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:13:46,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:13:46,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:13:46,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:13:48,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 347 [2022-12-13 19:13:48,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 49 transitions, 261 flow. Second operand has 10 states, 10 states have (on average 143.4) internal successors, (1434), 10 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:48,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:48,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 347 [2022-12-13 19:13:48,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:13:50,991 INFO L130 PetriNetUnfolder]: 14951/19922 cut-off events. [2022-12-13 19:13:50,992 INFO L131 PetriNetUnfolder]: For 2342/2342 co-relation queries the response was YES. [2022-12-13 19:13:51,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45903 conditions, 19922 events. 14951/19922 cut-off events. For 2342/2342 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 111558 event pairs, 963 based on Foata normal form. 450/11543 useless extension candidates. Maximal degree in co-relation 45875. Up to 6057 conditions per place. [2022-12-13 19:13:51,075 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 98 selfloop transitions, 15 changer transitions 0/115 dead transitions. [2022-12-13 19:13:51,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 115 transitions, 642 flow [2022-12-13 19:13:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:13:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:13:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1237 transitions. [2022-12-13 19:13:51,079 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44560518731988474 [2022-12-13 19:13:51,079 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1237 transitions. [2022-12-13 19:13:51,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1237 transitions. [2022-12-13 19:13:51,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:13:51,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1237 transitions. [2022-12-13 19:13:51,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.625) internal successors, (1237), 8 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:51,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 347.0) internal successors, (3123), 9 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:51,084 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 347.0) internal successors, (3123), 9 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:51,084 INFO L175 Difference]: Start difference. First operand has 73 places, 49 transitions, 261 flow. Second operand 8 states and 1237 transitions. [2022-12-13 19:13:51,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 115 transitions, 642 flow [2022-12-13 19:13:51,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 115 transitions, 623 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-12-13 19:13:51,089 INFO L231 Difference]: Finished difference. Result has 82 places, 54 transitions, 331 flow [2022-12-13 19:13:51,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=331, PETRI_PLACES=82, PETRI_TRANSITIONS=54} [2022-12-13 19:13:51,090 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2022-12-13 19:13:51,090 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 54 transitions, 331 flow [2022-12-13 19:13:51,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.4) internal successors, (1434), 10 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:51,091 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:51,091 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:13:51,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:51,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:51,292 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:13:51,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:51,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1331599282, now seen corresponding path program 1 times [2022-12-13 19:13:51,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:13:51,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096462252] [2022-12-13 19:13:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:51,295 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 19:13:51,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:13:51,297 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:51,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:51,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:13:51,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:51,482 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:13:51,482 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 19:13:51,626 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 19:13:51,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:13:51,800 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 19:13:51,801 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:13:51,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096462252] [2022-12-13 19:13:51,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096462252] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:13:51,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:13:51,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 19:13:51,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832813232] [2022-12-13 19:13:51,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:13:51,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:13:51,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:13:51,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:13:51,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:13:53,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:56,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:13:56,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 347 [2022-12-13 19:13:56,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 54 transitions, 331 flow. Second operand has 8 states, 8 states have (on average 141.75) internal successors, (1134), 8 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:56,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:56,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 347 [2022-12-13 19:13:56,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:13:58,336 INFO L130 PetriNetUnfolder]: 12144/16314 cut-off events. [2022-12-13 19:13:58,336 INFO L131 PetriNetUnfolder]: For 18494/19902 co-relation queries the response was YES. [2022-12-13 19:13:58,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45868 conditions, 16314 events. 12144/16314 cut-off events. For 18494/19902 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 88924 event pairs, 6316 based on Foata normal form. 1408/11082 useless extension candidates. Maximal degree in co-relation 45835. Up to 14340 conditions per place. [2022-12-13 19:13:58,405 INFO L137 encePairwiseOnDemand]: 343/347 looper letters, 73 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2022-12-13 19:13:58,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 80 transitions, 595 flow [2022-12-13 19:13:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:13:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:13:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 757 transitions. [2022-12-13 19:13:58,407 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43631123919308357 [2022-12-13 19:13:58,408 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 757 transitions. [2022-12-13 19:13:58,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 757 transitions. [2022-12-13 19:13:58,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:13:58,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 757 transitions. [2022-12-13 19:13:58,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:58,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:58,411 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:58,411 INFO L175 Difference]: Start difference. First operand has 82 places, 54 transitions, 331 flow. Second operand 5 states and 757 transitions. [2022-12-13 19:13:58,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 80 transitions, 595 flow [2022-12-13 19:13:58,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 80 transitions, 556 flow, removed 14 selfloop flow, removed 3 redundant places. [2022-12-13 19:13:58,426 INFO L231 Difference]: Finished difference. Result has 81 places, 52 transitions, 308 flow [2022-12-13 19:13:58,427 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=81, PETRI_TRANSITIONS=52} [2022-12-13 19:13:58,427 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2022-12-13 19:13:58,427 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 52 transitions, 308 flow [2022-12-13 19:13:58,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.75) internal successors, (1134), 8 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:58,428 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:58,428 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:13:58,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-12-13 19:13:58,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:58,629 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:13:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:58,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1331599281, now seen corresponding path program 1 times [2022-12-13 19:13:58,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:13:58,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358851242] [2022-12-13 19:13:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:58,632 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 19:13:58,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:13:58,634 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:58,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:13:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:58,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:13:58,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:58,794 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 19:13:58,794 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 29 [2022-12-13 19:13:58,822 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 19:13:58,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:13:58,822 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:13:58,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358851242] [2022-12-13 19:13:58,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358851242] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:13:58,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:13:58,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:13:58,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892767319] [2022-12-13 19:13:58,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:13:58,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:13:58,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:13:58,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:13:58,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:13:58,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 347 [2022-12-13 19:13:58,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 52 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:13:58,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:58,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 347 [2022-12-13 19:13:58,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:00,390 INFO L130 PetriNetUnfolder]: 11054/14864 cut-off events. [2022-12-13 19:14:00,391 INFO L131 PetriNetUnfolder]: For 15995/17259 co-relation queries the response was YES. [2022-12-13 19:14:00,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39173 conditions, 14864 events. 11054/14864 cut-off events. For 15995/17259 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 80275 event pairs, 5724 based on Foata normal form. 1264/10270 useless extension candidates. Maximal degree in co-relation 39140. Up to 14621 conditions per place. [2022-12-13 19:14:00,454 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 45 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2022-12-13 19:14:00,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 50 transitions, 396 flow [2022-12-13 19:14:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:14:00,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:14:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2022-12-13 19:14:00,456 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44668587896253603 [2022-12-13 19:14:00,456 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2022-12-13 19:14:00,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2022-12-13 19:14:00,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:00,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2022-12-13 19:14:00,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:00,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:00,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:00,458 INFO L175 Difference]: Start difference. First operand has 81 places, 52 transitions, 308 flow. Second operand 3 states and 465 transitions. [2022-12-13 19:14:00,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 50 transitions, 396 flow [2022-12-13 19:14:00,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 50 transitions, 391 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 19:14:00,467 INFO L231 Difference]: Finished difference. Result has 78 places, 50 transitions, 301 flow [2022-12-13 19:14:00,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=78, PETRI_TRANSITIONS=50} [2022-12-13 19:14:00,467 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 21 predicate places. [2022-12-13 19:14:00,467 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 50 transitions, 301 flow [2022-12-13 19:14:00,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:00,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:00,468 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:00,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 19:14:00,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:00,669 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:14:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:00,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1670100015, now seen corresponding path program 1 times [2022-12-13 19:14:00,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:14:00,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335159498] [2022-12-13 19:14:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:00,672 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 19:14:00,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:14:00,675 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:00,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:00,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:14:00,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:14:00,934 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 19:14:00,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:14:01,124 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 25 treesize of output 21 [2022-12-13 19:14:01,181 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 19:14:01,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:14:01,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335159498] [2022-12-13 19:14:01,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335159498] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:14:01,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:14:01,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:14:01,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731884914] [2022-12-13 19:14:01,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:14:01,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:14:01,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:14:01,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:14:01,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:14:02,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 347 [2022-12-13 19:14:02,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 50 transitions, 301 flow. Second operand has 10 states, 10 states have (on average 143.6) internal successors, (1436), 10 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:02,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:02,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 347 [2022-12-13 19:14:02,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:05,292 INFO L130 PetriNetUnfolder]: 15405/21123 cut-off events. [2022-12-13 19:14:05,292 INFO L131 PetriNetUnfolder]: For 24708/26800 co-relation queries the response was YES. [2022-12-13 19:14:05,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57064 conditions, 21123 events. 15405/21123 cut-off events. For 24708/26800 co-relation queries the response was YES. Maximal size of possible extension queue 995. Compared 122094 event pairs, 5175 based on Foata normal form. 2092/16269 useless extension candidates. Maximal degree in co-relation 57031. Up to 12297 conditions per place. [2022-12-13 19:14:05,392 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 108 selfloop transitions, 12 changer transitions 0/123 dead transitions. [2022-12-13 19:14:05,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 123 transitions, 829 flow [2022-12-13 19:14:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:14:05,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 19:14:05,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1365 transitions. [2022-12-13 19:14:05,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43707973102785785 [2022-12-13 19:14:05,395 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1365 transitions. [2022-12-13 19:14:05,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1365 transitions. [2022-12-13 19:14:05,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:05,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1365 transitions. [2022-12-13 19:14:05,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.66666666666666) internal successors, (1365), 9 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:05,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 347.0) internal successors, (3470), 10 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:05,399 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 347.0) internal successors, (3470), 10 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:05,399 INFO L175 Difference]: Start difference. First operand has 78 places, 50 transitions, 301 flow. Second operand 9 states and 1365 transitions. [2022-12-13 19:14:05,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 123 transitions, 829 flow [2022-12-13 19:14:05,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 123 transitions, 828 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:14:05,415 INFO L231 Difference]: Finished difference. Result has 87 places, 53 transitions, 342 flow [2022-12-13 19:14:05,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=342, PETRI_PLACES=87, PETRI_TRANSITIONS=53} [2022-12-13 19:14:05,416 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2022-12-13 19:14:05,416 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 53 transitions, 342 flow [2022-12-13 19:14:05,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.6) internal successors, (1436), 10 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:05,416 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:05,416 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:05,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:05,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:05,617 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:14:05,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:05,618 INFO L85 PathProgramCache]: Analyzing trace with hash -233490332, now seen corresponding path program 1 times [2022-12-13 19:14:05,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:14:05,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123382126] [2022-12-13 19:14:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:05,620 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 19:14:05,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:14:05,622 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:05,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:05,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 19:14:05,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:14:05,827 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:14:05,827 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 19:14:06,017 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 19:14:06,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:14:06,383 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 19:14:06,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:14:06,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123382126] [2022-12-13 19:14:06,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123382126] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:14:06,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:14:06,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:14:06,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283361369] [2022-12-13 19:14:06,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:14:06,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:14:06,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:14:06,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:14:06,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:14:08,671 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 347 [2022-12-13 19:14:08,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 53 transitions, 342 flow. Second operand has 10 states, 10 states have (on average 141.8) internal successors, (1418), 10 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:08,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:08,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 347 [2022-12-13 19:14:08,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:13,982 INFO L130 PetriNetUnfolder]: 29369/39767 cut-off events. [2022-12-13 19:14:13,982 INFO L131 PetriNetUnfolder]: For 55593/59485 co-relation queries the response was YES. [2022-12-13 19:14:14,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117325 conditions, 39767 events. 29369/39767 cut-off events. For 55593/59485 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 247535 event pairs, 4239 based on Foata normal form. 3892/34543 useless extension candidates. Maximal degree in co-relation 117289. Up to 9937 conditions per place. [2022-12-13 19:14:14,254 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 144 selfloop transitions, 15 changer transitions 0/162 dead transitions. [2022-12-13 19:14:14,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 162 transitions, 1146 flow [2022-12-13 19:14:14,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:14:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 19:14:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1364 transitions. [2022-12-13 19:14:14,258 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4367595260967019 [2022-12-13 19:14:14,258 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1364 transitions. [2022-12-13 19:14:14,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1364 transitions. [2022-12-13 19:14:14,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:14,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1364 transitions. [2022-12-13 19:14:14,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.55555555555554) internal successors, (1364), 9 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:14,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 347.0) internal successors, (3470), 10 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:14,262 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 347.0) internal successors, (3470), 10 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:14,262 INFO L175 Difference]: Start difference. First operand has 87 places, 53 transitions, 342 flow. Second operand 9 states and 1364 transitions. [2022-12-13 19:14:14,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 162 transitions, 1146 flow [2022-12-13 19:14:14,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 162 transitions, 1135 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 19:14:14,299 INFO L231 Difference]: Finished difference. Result has 95 places, 58 transitions, 413 flow [2022-12-13 19:14:14,299 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=413, PETRI_PLACES=95, PETRI_TRANSITIONS=58} [2022-12-13 19:14:14,299 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2022-12-13 19:14:14,299 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 58 transitions, 413 flow [2022-12-13 19:14:14,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 141.8) internal successors, (1418), 10 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:14,300 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:14,300 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:14,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 19:14:14,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:14,501 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:14:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:14,502 INFO L85 PathProgramCache]: Analyzing trace with hash 263234121, now seen corresponding path program 2 times [2022-12-13 19:14:14,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:14:14,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259071163] [2022-12-13 19:14:14,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:14:14,504 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 19:14:14,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:14:14,507 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:14,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:14,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:14:14,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:14:14,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 19:14:14,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:14:14,718 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:14:14,718 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 19:14:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:14:14,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:14:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:14:16,044 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:14:16,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259071163] [2022-12-13 19:14:16,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259071163] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:14:16,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:14:16,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 19:14:16,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292571046] [2022-12-13 19:14:16,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:14:16,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 19:14:16,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:14:16,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 19:14:16,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:14:26,257 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2022-12-13 19:14:26,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 58 transitions, 413 flow. Second operand has 18 states, 18 states have (on average 137.11111111111111) internal successors, (2468), 18 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:26,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:26,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2022-12-13 19:14:26,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:40,226 INFO L130 PetriNetUnfolder]: 30013/40935 cut-off events. [2022-12-13 19:14:40,226 INFO L131 PetriNetUnfolder]: For 107551/110368 co-relation queries the response was YES. [2022-12-13 19:14:40,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139351 conditions, 40935 events. 30013/40935 cut-off events. For 107551/110368 co-relation queries the response was YES. Maximal size of possible extension queue 1843. Compared 259142 event pairs, 9135 based on Foata normal form. 3123/35377 useless extension candidates. Maximal degree in co-relation 139311. Up to 15994 conditions per place. [2022-12-13 19:14:40,525 INFO L137 encePairwiseOnDemand]: 339/347 looper letters, 297 selfloop transitions, 24 changer transitions 0/324 dead transitions. [2022-12-13 19:14:40,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 324 transitions, 2437 flow [2022-12-13 19:14:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 19:14:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 19:14:40,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2810 transitions. [2022-12-13 19:14:40,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42620961625966935 [2022-12-13 19:14:40,532 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2810 transitions. [2022-12-13 19:14:40,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2810 transitions. [2022-12-13 19:14:40,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:40,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2810 transitions. [2022-12-13 19:14:40,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 147.89473684210526) internal successors, (2810), 19 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:40,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:40,541 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:40,541 INFO L175 Difference]: Start difference. First operand has 95 places, 58 transitions, 413 flow. Second operand 19 states and 2810 transitions. [2022-12-13 19:14:40,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 324 transitions, 2437 flow [2022-12-13 19:14:40,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 324 transitions, 2218 flow, removed 98 selfloop flow, removed 3 redundant places. [2022-12-13 19:14:40,697 INFO L231 Difference]: Finished difference. Result has 117 places, 70 transitions, 556 flow [2022-12-13 19:14:40,697 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=556, PETRI_PLACES=117, PETRI_TRANSITIONS=70} [2022-12-13 19:14:40,697 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 60 predicate places. [2022-12-13 19:14:40,697 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 70 transitions, 556 flow [2022-12-13 19:14:40,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.11111111111111) internal successors, (2468), 18 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:40,698 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:40,698 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:40,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-12-13 19:14:40,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:40,899 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:14:40,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:40,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1356719435, now seen corresponding path program 1 times [2022-12-13 19:14:40,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:14:40,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803828577] [2022-12-13 19:14:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:40,901 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 19:14:40,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:14:40,904 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:40,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:41,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 19:14:41,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:14:41,089 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:14:41,089 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 19:14:41,261 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 19:14:41,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:14:41,818 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 19:14:41,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:14:41,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803828577] [2022-12-13 19:14:41,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803828577] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:14:41,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:14:41,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:14:41,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20119593] [2022-12-13 19:14:41,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:14:41,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:14:41,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:14:41,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:14:41,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:14:46,250 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 347 [2022-12-13 19:14:46,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 70 transitions, 556 flow. Second operand has 10 states, 10 states have (on average 137.0) internal successors, (1370), 10 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:46,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:46,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 347 [2022-12-13 19:14:46,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:54,561 INFO L130 PetriNetUnfolder]: 27287/38781 cut-off events. [2022-12-13 19:14:54,561 INFO L131 PetriNetUnfolder]: For 139773/146580 co-relation queries the response was YES. [2022-12-13 19:14:54,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143638 conditions, 38781 events. 27287/38781 cut-off events. For 139773/146580 co-relation queries the response was YES. Maximal size of possible extension queue 1468. Compared 249360 event pairs, 17843 based on Foata normal form. 6807/40824 useless extension candidates. Maximal degree in co-relation 143591. Up to 22069 conditions per place. [2022-12-13 19:14:54,929 INFO L137 encePairwiseOnDemand]: 339/347 looper letters, 148 selfloop transitions, 15 changer transitions 0/168 dead transitions. [2022-12-13 19:14:54,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 168 transitions, 1392 flow [2022-12-13 19:14:54,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 19:14:54,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 19:14:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1590 transitions. [2022-12-13 19:14:54,934 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4165575058946817 [2022-12-13 19:14:54,934 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1590 transitions. [2022-12-13 19:14:54,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1590 transitions. [2022-12-13 19:14:54,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:54,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1590 transitions. [2022-12-13 19:14:54,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 144.54545454545453) internal successors, (1590), 11 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:54,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 347.0) internal successors, (4164), 12 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:54,941 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 347.0) internal successors, (4164), 12 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:54,941 INFO L175 Difference]: Start difference. First operand has 117 places, 70 transitions, 556 flow. Second operand 11 states and 1590 transitions. [2022-12-13 19:14:54,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 168 transitions, 1392 flow [2022-12-13 19:14:55,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 168 transitions, 1293 flow, removed 34 selfloop flow, removed 11 redundant places. [2022-12-13 19:14:55,175 INFO L231 Difference]: Finished difference. Result has 118 places, 74 transitions, 539 flow [2022-12-13 19:14:55,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=539, PETRI_PLACES=118, PETRI_TRANSITIONS=74} [2022-12-13 19:14:55,175 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 61 predicate places. [2022-12-13 19:14:55,175 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 74 transitions, 539 flow [2022-12-13 19:14:55,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.0) internal successors, (1370), 10 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:55,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:55,176 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:55,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-12-13 19:14:55,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:55,377 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:14:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash -891366327, now seen corresponding path program 1 times [2022-12-13 19:14:55,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:14:55,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910171665] [2022-12-13 19:14:55,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:55,380 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 19:14:55,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:14:55,383 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:55,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:14:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:55,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 19:14:55,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:14:55,648 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 19:14:55,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:14:55,922 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 19:14:55,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:14:55,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910171665] [2022-12-13 19:14:55,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910171665] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:14:55,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:14:55,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 19:14:55,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291332528] [2022-12-13 19:14:55,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:14:55,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:14:55,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:14:55,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:14:55,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:14:56,745 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 347 [2022-12-13 19:14:56,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 74 transitions, 539 flow. Second operand has 12 states, 12 states have (on average 143.83333333333334) internal successors, (1726), 12 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:56,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:56,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 347 [2022-12-13 19:14:56,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:02,434 INFO L130 PetriNetUnfolder]: 21755/30859 cut-off events. [2022-12-13 19:15:02,435 INFO L131 PetriNetUnfolder]: For 112065/117624 co-relation queries the response was YES. [2022-12-13 19:15:02,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123938 conditions, 30859 events. 21755/30859 cut-off events. For 112065/117624 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 191190 event pairs, 11742 based on Foata normal form. 5647/34869 useless extension candidates. Maximal degree in co-relation 123893. Up to 22588 conditions per place. [2022-12-13 19:15:02,815 INFO L137 encePairwiseOnDemand]: 339/347 looper letters, 143 selfloop transitions, 12 changer transitions 0/160 dead transitions. [2022-12-13 19:15:02,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 160 transitions, 1335 flow [2022-12-13 19:15:02,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 19:15:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 19:15:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1502 transitions. [2022-12-13 19:15:02,818 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4328530259365994 [2022-12-13 19:15:02,818 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1502 transitions. [2022-12-13 19:15:02,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1502 transitions. [2022-12-13 19:15:02,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:02,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1502 transitions. [2022-12-13 19:15:02,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 150.2) internal successors, (1502), 10 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:02,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 347.0) internal successors, (3817), 11 states have internal predecessors, (3817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:02,822 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 347.0) internal successors, (3817), 11 states have internal predecessors, (3817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:02,822 INFO L175 Difference]: Start difference. First operand has 118 places, 74 transitions, 539 flow. Second operand 10 states and 1502 transitions. [2022-12-13 19:15:02,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 160 transitions, 1335 flow [2022-12-13 19:15:03,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 160 transitions, 1314 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-12-13 19:15:03,181 INFO L231 Difference]: Finished difference. Result has 124 places, 75 transitions, 558 flow [2022-12-13 19:15:03,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=558, PETRI_PLACES=124, PETRI_TRANSITIONS=75} [2022-12-13 19:15:03,182 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 67 predicate places. [2022-12-13 19:15:03,182 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 75 transitions, 558 flow [2022-12-13 19:15:03,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 143.83333333333334) internal successors, (1726), 12 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:03,183 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:03,183 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:15:03,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:15:03,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:15:03,384 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:15:03,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:03,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1939101841, now seen corresponding path program 2 times [2022-12-13 19:15:03,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:15:03,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191799665] [2022-12-13 19:15:03,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:15:03,386 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 19:15:03,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:15:03,389 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:15:03,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:15:03,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:15:03,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:15:03,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 19:15:03,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:03,735 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:15:03,735 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 19:15:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:15:04,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:15:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:15:05,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:15:05,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191799665] [2022-12-13 19:15:05,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191799665] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:15:05,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:15:05,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 19:15:05,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921207104] [2022-12-13 19:15:05,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:15:05,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 19:15:05,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:15:05,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 19:15:05,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:15:16,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 347 [2022-12-13 19:15:16,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 75 transitions, 558 flow. Second operand has 18 states, 18 states have (on average 135.33333333333334) internal successors, (2436), 18 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:16,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:16,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 347 [2022-12-13 19:15:16,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:33,950 INFO L130 PetriNetUnfolder]: 25273/34866 cut-off events. [2022-12-13 19:15:33,951 INFO L131 PetriNetUnfolder]: For 130444/134150 co-relation queries the response was YES. [2022-12-13 19:15:34,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154000 conditions, 34866 events. 25273/34866 cut-off events. For 130444/134150 co-relation queries the response was YES. Maximal size of possible extension queue 1634. Compared 221863 event pairs, 8306 based on Foata normal form. 3908/35484 useless extension candidates. Maximal degree in co-relation 153953. Up to 15532 conditions per place. [2022-12-13 19:15:34,268 INFO L137 encePairwiseOnDemand]: 339/347 looper letters, 319 selfloop transitions, 24 changer transitions 0/349 dead transitions. [2022-12-13 19:15:34,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 349 transitions, 2921 flow [2022-12-13 19:15:34,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 19:15:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 19:15:34,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2766 transitions. [2022-12-13 19:15:34,274 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41953587137873505 [2022-12-13 19:15:34,274 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2766 transitions. [2022-12-13 19:15:34,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2766 transitions. [2022-12-13 19:15:34,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:34,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2766 transitions. [2022-12-13 19:15:34,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 145.57894736842104) internal successors, (2766), 19 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:34,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:34,282 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:34,282 INFO L175 Difference]: Start difference. First operand has 124 places, 75 transitions, 558 flow. Second operand 19 states and 2766 transitions. [2022-12-13 19:15:34,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 349 transitions, 2921 flow [2022-12-13 19:15:34,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 349 transitions, 2902 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 19:15:34,693 INFO L231 Difference]: Finished difference. Result has 143 places, 87 transitions, 698 flow [2022-12-13 19:15:34,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=698, PETRI_PLACES=143, PETRI_TRANSITIONS=87} [2022-12-13 19:15:34,694 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 86 predicate places. [2022-12-13 19:15:34,694 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 87 transitions, 698 flow [2022-12-13 19:15:34,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 135.33333333333334) internal successors, (2436), 18 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:34,694 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:34,694 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 19:15:34,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:15:34,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:15:34,895 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:15:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:34,897 INFO L85 PathProgramCache]: Analyzing trace with hash 418195117, now seen corresponding path program 3 times [2022-12-13 19:15:34,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:15:34,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954523474] [2022-12-13 19:15:34,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:15:34,898 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 19:15:34,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:15:34,901 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:15:34,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:15:35,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 19:15:35,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:15:35,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 19:15:35,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:35,226 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:15:35,227 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 19:15:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:15:35,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:15:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:15:38,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:15:38,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954523474] [2022-12-13 19:15:38,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954523474] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:15:38,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:15:38,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 19:15:38,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974924759] [2022-12-13 19:15:38,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:15:38,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 19:15:38,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:15:38,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 19:15:38,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 19:15:52,600 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 347 [2022-12-13 19:15:52,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 87 transitions, 698 flow. Second operand has 24 states, 24 states have (on average 146.0) internal successors, (3504), 24 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:52,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:52,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 347 [2022-12-13 19:15:52,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:25,326 INFO L130 PetriNetUnfolder]: 63467/87425 cut-off events. [2022-12-13 19:16:25,326 INFO L131 PetriNetUnfolder]: For 425307/440409 co-relation queries the response was YES. [2022-12-13 19:16:25,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414259 conditions, 87425 events. 63467/87425 cut-off events. For 425307/440409 co-relation queries the response was YES. Maximal size of possible extension queue 2186. Compared 571057 event pairs, 41701 based on Foata normal form. 15114/94317 useless extension candidates. Maximal degree in co-relation 414206. Up to 25269 conditions per place. [2022-12-13 19:16:26,333 INFO L137 encePairwiseOnDemand]: 343/347 looper letters, 716 selfloop transitions, 24 changer transitions 0/749 dead transitions. [2022-12-13 19:16:26,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 749 transitions, 6579 flow [2022-12-13 19:16:26,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 19:16:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 19:16:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3976 transitions. [2022-12-13 19:16:26,339 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47742555235350626 [2022-12-13 19:16:26,339 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3976 transitions. [2022-12-13 19:16:26,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3976 transitions. [2022-12-13 19:16:26,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:26,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3976 transitions. [2022-12-13 19:16:26,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 165.66666666666666) internal successors, (3976), 24 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:26,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:26,351 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:26,351 INFO L175 Difference]: Start difference. First operand has 143 places, 87 transitions, 698 flow. Second operand 24 states and 3976 transitions. [2022-12-13 19:16:26,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 749 transitions, 6579 flow [2022-12-13 19:16:29,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 749 transitions, 6517 flow, removed 24 selfloop flow, removed 5 redundant places. [2022-12-13 19:16:29,881 INFO L231 Difference]: Finished difference. Result has 174 places, 100 transitions, 829 flow [2022-12-13 19:16:29,881 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=829, PETRI_PLACES=174, PETRI_TRANSITIONS=100} [2022-12-13 19:16:29,882 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 117 predicate places. [2022-12-13 19:16:29,882 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 100 transitions, 829 flow [2022-12-13 19:16:29,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 146.0) internal successors, (3504), 24 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:29,882 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:29,882 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:29,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 19:16:30,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:16:30,084 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:16:30,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:30,085 INFO L85 PathProgramCache]: Analyzing trace with hash -902303238, now seen corresponding path program 2 times [2022-12-13 19:16:30,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:30,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807358086] [2022-12-13 19:16:30,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:16:30,087 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 19:16:30,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:30,090 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:16:30,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:16:30,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:16:30,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:16:30,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 19:16:30,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:30,527 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:16:30,528 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 19:16:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:30,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:32,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:32,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807358086] [2022-12-13 19:16:32,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807358086] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:32,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:16:32,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 19:16:32,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523784811] [2022-12-13 19:16:32,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:32,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 19:16:32,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:32,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 19:16:32,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:16:45,380 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 347 [2022-12-13 19:16:45,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 100 transitions, 829 flow. Second operand has 14 states, 14 states have (on average 135.71428571428572) internal successors, (1900), 14 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:45,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:45,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 347 [2022-12-13 19:16:45,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:07,214 INFO L130 PetriNetUnfolder]: 64177/90237 cut-off events. [2022-12-13 19:17:07,214 INFO L131 PetriNetUnfolder]: For 457819/474111 co-relation queries the response was YES. [2022-12-13 19:17:08,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413485 conditions, 90237 events. 64177/90237 cut-off events. For 457819/474111 co-relation queries the response was YES. Maximal size of possible extension queue 1949. Compared 595679 event pairs, 29705 based on Foata normal form. 16692/102197 useless extension candidates. Maximal degree in co-relation 413418. Up to 46260 conditions per place. [2022-12-13 19:17:08,466 INFO L137 encePairwiseOnDemand]: 339/347 looper letters, 396 selfloop transitions, 25 changer transitions 0/427 dead transitions. [2022-12-13 19:17:08,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 427 transitions, 3920 flow [2022-12-13 19:17:08,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 19:17:08,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 19:17:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2737 transitions. [2022-12-13 19:17:08,472 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41513726679811924 [2022-12-13 19:17:08,472 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2737 transitions. [2022-12-13 19:17:08,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2737 transitions. [2022-12-13 19:17:08,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:08,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2737 transitions. [2022-12-13 19:17:08,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 144.05263157894737) internal successors, (2737), 19 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:08,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:08,479 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:08,479 INFO L175 Difference]: Start difference. First operand has 174 places, 100 transitions, 829 flow. Second operand 19 states and 2737 transitions. [2022-12-13 19:17:08,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 427 transitions, 3920 flow [2022-12-13 19:17:12,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 427 transitions, 3896 flow, removed 1 selfloop flow, removed 10 redundant places. [2022-12-13 19:17:12,701 INFO L231 Difference]: Finished difference. Result has 186 places, 111 transitions, 980 flow [2022-12-13 19:17:12,701 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=980, PETRI_PLACES=186, PETRI_TRANSITIONS=111} [2022-12-13 19:17:12,701 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 129 predicate places. [2022-12-13 19:17:12,701 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 111 transitions, 980 flow [2022-12-13 19:17:12,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 135.71428571428572) internal successors, (1900), 14 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:12,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:12,702 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-12-13 19:17:12,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:17:12,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:17:12,903 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:17:12,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash -440610749, now seen corresponding path program 3 times [2022-12-13 19:17:12,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:17:12,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121349038] [2022-12-13 19:17:12,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:17:12,905 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 19:17:12,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:17:12,908 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:17:12,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:17:13,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 19:17:13,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:13,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 19:17:13,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:13,194 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:17:13,194 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 19:17:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:13,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:17:13,499 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 8 treesize of output 6 [2022-12-13 19:17:13,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-13 19:17:13,522 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 19:17:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:14,486 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:17:14,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121349038] [2022-12-13 19:17:14,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121349038] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:17:14,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:17:14,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-12-13 19:17:14,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698484660] [2022-12-13 19:17:14,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:17:14,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 19:17:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:17:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 19:17:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-13 19:17:23,924 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 347 [2022-12-13 19:17:23,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 111 transitions, 980 flow. Second operand has 20 states, 20 states have (on average 141.15) internal successors, (2823), 20 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:23,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:23,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 347 [2022-12-13 19:17:23,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:49,861 INFO L130 PetriNetUnfolder]: 69901/96580 cut-off events. [2022-12-13 19:17:49,861 INFO L131 PetriNetUnfolder]: For 691003/700850 co-relation queries the response was YES. [2022-12-13 19:17:50,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502260 conditions, 96580 events. 69901/96580 cut-off events. For 691003/700850 co-relation queries the response was YES. Maximal size of possible extension queue 2552. Compared 654543 event pairs, 32957 based on Foata normal form. 10277/104965 useless extension candidates. Maximal degree in co-relation 502188. Up to 69255 conditions per place. [2022-12-13 19:17:51,322 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 445 selfloop transitions, 27 changer transitions 0/480 dead transitions. [2022-12-13 19:17:51,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 480 transitions, 4422 flow [2022-12-13 19:17:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 19:17:51,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 19:17:51,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3181 transitions. [2022-12-13 19:17:51,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43653080828873336 [2022-12-13 19:17:51,327 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3181 transitions. [2022-12-13 19:17:51,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3181 transitions. [2022-12-13 19:17:51,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:51,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3181 transitions. [2022-12-13 19:17:51,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 151.47619047619048) internal successors, (3181), 21 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:51,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 347.0) internal successors, (7634), 22 states have internal predecessors, (7634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:51,335 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 347.0) internal successors, (7634), 22 states have internal predecessors, (7634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:51,335 INFO L175 Difference]: Start difference. First operand has 186 places, 111 transitions, 980 flow. Second operand 21 states and 3181 transitions. [2022-12-13 19:17:51,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 480 transitions, 4422 flow [2022-12-13 19:17:56,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 480 transitions, 4315 flow, removed 42 selfloop flow, removed 9 redundant places. [2022-12-13 19:17:56,061 INFO L231 Difference]: Finished difference. Result has 204 places, 118 transitions, 1099 flow [2022-12-13 19:17:56,062 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1099, PETRI_PLACES=204, PETRI_TRANSITIONS=118} [2022-12-13 19:17:56,062 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 147 predicate places. [2022-12-13 19:17:56,062 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 118 transitions, 1099 flow [2022-12-13 19:17:56,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 141.15) internal successors, (2823), 20 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:56,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:56,062 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:56,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 19:17:56,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:17:56,263 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:17:56,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:56,264 INFO L85 PathProgramCache]: Analyzing trace with hash -517635174, now seen corresponding path program 2 times [2022-12-13 19:17:56,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:17:56,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322122980] [2022-12-13 19:17:56,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:17:56,266 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 19:17:56,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:17:56,269 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:17:56,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 19:17:56,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:17:56,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:56,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 19:17:56,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:56,471 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:17:56,471 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 19:17:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:17:56,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:17:56,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:17:56,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322122980] [2022-12-13 19:17:56,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322122980] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:17:56,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:17:56,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:17:56,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495526823] [2022-12-13 19:17:56,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:17:56,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:17:56,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:17:56,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:17:56,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:17:57,022 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 347 [2022-12-13 19:17:57,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 118 transitions, 1099 flow. Second operand has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:57,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:57,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 347 [2022-12-13 19:17:57,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:12,422 INFO L130 PetriNetUnfolder]: 67125/94577 cut-off events. [2022-12-13 19:18:12,422 INFO L131 PetriNetUnfolder]: For 708604/725940 co-relation queries the response was YES. [2022-12-13 19:18:13,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487432 conditions, 94577 events. 67125/94577 cut-off events. For 708604/725940 co-relation queries the response was YES. Maximal size of possible extension queue 1963. Compared 630742 event pairs, 41073 based on Foata normal form. 25656/120132 useless extension candidates. Maximal degree in co-relation 487354. Up to 78587 conditions per place. [2022-12-13 19:18:13,889 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 143 selfloop transitions, 19 changer transitions 0/170 dead transitions. [2022-12-13 19:18:13,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 170 transitions, 1871 flow [2022-12-13 19:18:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:18:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:18:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 740 transitions. [2022-12-13 19:18:13,892 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4265129682997118 [2022-12-13 19:18:13,892 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 740 transitions. [2022-12-13 19:18:13,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 740 transitions. [2022-12-13 19:18:13,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:13,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 740 transitions. [2022-12-13 19:18:13,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:13,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:13,894 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:13,894 INFO L175 Difference]: Start difference. First operand has 204 places, 118 transitions, 1099 flow. Second operand 5 states and 740 transitions. [2022-12-13 19:18:13,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 170 transitions, 1871 flow [2022-12-13 19:18:19,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 170 transitions, 1835 flow, removed 8 selfloop flow, removed 7 redundant places. [2022-12-13 19:18:19,430 INFO L231 Difference]: Finished difference. Result has 201 places, 118 transitions, 1124 flow [2022-12-13 19:18:19,430 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1124, PETRI_PLACES=201, PETRI_TRANSITIONS=118} [2022-12-13 19:18:19,430 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 144 predicate places. [2022-12-13 19:18:19,430 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 118 transitions, 1124 flow [2022-12-13 19:18:19,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:19,431 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:19,431 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-12-13 19:18:19,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-13 19:18:19,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:18:19,632 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:18:19,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:19,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1611120488, now seen corresponding path program 4 times [2022-12-13 19:18:19,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:18:19,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743548058] [2022-12-13 19:18:19,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:18:19,636 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 19:18:19,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:18:19,640 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:18:19,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-13 19:18:19,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:18:19,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:19,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 19:18:19,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:19,900 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:18:19,900 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 19:18:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:20,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:22,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:18:22,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743548058] [2022-12-13 19:18:22,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743548058] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:22,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:18:22,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 19:18:22,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604063389] [2022-12-13 19:18:22,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:22,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 19:18:22,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:18:22,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 19:18:22,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-12-13 19:18:37,560 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 347 [2022-12-13 19:18:37,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 118 transitions, 1124 flow. Second operand has 24 states, 24 states have (on average 139.08333333333334) internal successors, (3338), 24 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:37,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:37,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 347 [2022-12-13 19:18:37,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:19:22,586 INFO L130 PetriNetUnfolder]: 90365/125111 cut-off events. [2022-12-13 19:19:22,586 INFO L131 PetriNetUnfolder]: For 1133694/1163919 co-relation queries the response was YES. [2022-12-13 19:19:24,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694740 conditions, 125111 events. 90365/125111 cut-off events. For 1133694/1163919 co-relation queries the response was YES. Maximal size of possible extension queue 2383. Compared 843255 event pairs, 9643 based on Foata normal form. 46499/171438 useless extension candidates. Maximal degree in co-relation 694660. Up to 26536 conditions per place. [2022-12-13 19:19:24,646 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 699 selfloop transitions, 50 changer transitions 0/757 dead transitions. [2022-12-13 19:19:24,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 757 transitions, 7115 flow [2022-12-13 19:19:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 19:19:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 19:19:24,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5533 transitions. [2022-12-13 19:19:24,654 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4309525663992523 [2022-12-13 19:19:24,654 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5533 transitions. [2022-12-13 19:19:24,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5533 transitions. [2022-12-13 19:19:24,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:19:24,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5533 transitions. [2022-12-13 19:19:24,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 149.54054054054055) internal successors, (5533), 37 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:24,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:24,668 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:24,669 INFO L175 Difference]: Start difference. First operand has 201 places, 118 transitions, 1124 flow. Second operand 37 states and 5533 transitions. [2022-12-13 19:19:24,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 757 transitions, 7115 flow [2022-12-13 19:19:31,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 757 transitions, 6803 flow, removed 105 selfloop flow, removed 6 redundant places. [2022-12-13 19:19:31,288 INFO L231 Difference]: Finished difference. Result has 237 places, 129 transitions, 1282 flow [2022-12-13 19:19:31,288 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1282, PETRI_PLACES=237, PETRI_TRANSITIONS=129} [2022-12-13 19:19:31,288 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 180 predicate places. [2022-12-13 19:19:31,289 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 129 transitions, 1282 flow [2022-12-13 19:19:31,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 139.08333333333334) internal successors, (3338), 24 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:31,289 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:19:31,289 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:19:31,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 19:19:31,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:19:31,489 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:19:31,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:19:31,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1937819371, now seen corresponding path program 3 times [2022-12-13 19:19:31,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:19:31,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374624797] [2022-12-13 19:19:31,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:19:31,490 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 19:19:31,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:19:31,491 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:19:31,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-13 19:19:31,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 19:19:31,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:19:31,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 19:19:31,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:19:31,777 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:19:31,777 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 19:19:31,825 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 15 treesize of output 11 [2022-12-13 19:19:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:19:31,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:19:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:19:32,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:19:32,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374624797] [2022-12-13 19:19:32,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374624797] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:19:32,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:19:32,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 19:19:32,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972729478] [2022-12-13 19:19:32,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:19:32,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 19:19:32,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:19:32,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 19:19:32,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:19:36,214 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2022-12-13 19:19:36,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 129 transitions, 1282 flow. Second operand has 14 states, 14 states have (on average 137.57142857142858) internal successors, (1926), 14 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:36,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:19:36,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2022-12-13 19:19:36,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:19:59,105 INFO L130 PetriNetUnfolder]: 91946/126993 cut-off events. [2022-12-13 19:19:59,105 INFO L131 PetriNetUnfolder]: For 1196202/1223693 co-relation queries the response was YES. [2022-12-13 19:20:00,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710043 conditions, 126993 events. 91946/126993 cut-off events. For 1196202/1223693 co-relation queries the response was YES. Maximal size of possible extension queue 2239. Compared 834136 event pairs, 40581 based on Foata normal form. 27543/154415 useless extension candidates. Maximal degree in co-relation 709960. Up to 76579 conditions per place. [2022-12-13 19:20:01,557 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 230 selfloop transitions, 21 changer transitions 0/261 dead transitions. [2022-12-13 19:20:01,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 261 transitions, 2697 flow [2022-12-13 19:20:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:20:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:20:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2034 transitions. [2022-12-13 19:20:01,559 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41869081926718815 [2022-12-13 19:20:01,560 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2034 transitions. [2022-12-13 19:20:01,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2034 transitions. [2022-12-13 19:20:01,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:20:01,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2034 transitions. [2022-12-13 19:20:01,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 145.28571428571428) internal successors, (2034), 14 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:01,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 347.0) internal successors, (5205), 15 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:01,565 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 347.0) internal successors, (5205), 15 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:01,566 INFO L175 Difference]: Start difference. First operand has 237 places, 129 transitions, 1282 flow. Second operand 14 states and 2034 transitions. [2022-12-13 19:20:01,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 261 transitions, 2697 flow [2022-12-13 19:20:30,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 261 transitions, 2254 flow, removed 95 selfloop flow, removed 28 redundant places. [2022-12-13 19:20:30,439 INFO L231 Difference]: Finished difference. Result has 226 places, 133 transitions, 1153 flow [2022-12-13 19:20:30,439 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1153, PETRI_PLACES=226, PETRI_TRANSITIONS=133} [2022-12-13 19:20:30,440 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 169 predicate places. [2022-12-13 19:20:30,440 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 133 transitions, 1153 flow [2022-12-13 19:20:30,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 137.57142857142858) internal successors, (1926), 14 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:30,440 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:20:30,440 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:20:30,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-13 19:20:30,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:20:30,641 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:20:30,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:20:30,642 INFO L85 PathProgramCache]: Analyzing trace with hash 172937963, now seen corresponding path program 3 times [2022-12-13 19:20:30,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:20:30,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534503940] [2022-12-13 19:20:30,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:20:30,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:20:30,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:20:30,644 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:20:30,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-13 19:20:30,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 19:20:30,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:20:30,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 19:20:30,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:20:30,926 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:20:30,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 19:20:31,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 90 [2022-12-13 19:20:31,353 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 7 treesize of output 5 [2022-12-13 19:20:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:20:31,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:20:31,933 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 8 treesize of output 6 [2022-12-13 19:20:32,000 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 19:20:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:20:34,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:20:34,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534503940] [2022-12-13 19:20:34,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534503940] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:20:34,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:20:34,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 19:20:34,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822841237] [2022-12-13 19:20:34,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:20:34,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:20:34,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:20:34,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:20:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:20:36,989 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 19:20:41,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:20:51,239 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 347 [2022-12-13 19:20:51,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 133 transitions, 1153 flow. Second operand has 12 states, 12 states have (on average 128.0) internal successors, (1536), 12 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:51,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:20:51,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 347 [2022-12-13 19:20:51,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:20:54,640 WARN L539 Checker$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 19:20:56,938 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 19:21:22,730 INFO L130 PetriNetUnfolder]: 115291/159455 cut-off events. [2022-12-13 19:21:22,730 INFO L131 PetriNetUnfolder]: For 1323860/1343822 co-relation queries the response was YES. [2022-12-13 19:21:24,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 801331 conditions, 159455 events. 115291/159455 cut-off events. For 1323860/1343822 co-relation queries the response was YES. Maximal size of possible extension queue 2851. Compared 1089283 event pairs, 17415 based on Foata normal form. 31550/190904 useless extension candidates. Maximal degree in co-relation 801250. Up to 53176 conditions per place. [2022-12-13 19:21:25,624 INFO L137 encePairwiseOnDemand]: 342/347 looper letters, 302 selfloop transitions, 21 changer transitions 0/332 dead transitions. [2022-12-13 19:21:25,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 332 transitions, 3352 flow [2022-12-13 19:21:25,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:21:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 19:21:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 947 transitions. [2022-12-13 19:21:25,628 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38987237546315356 [2022-12-13 19:21:25,628 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 947 transitions. [2022-12-13 19:21:25,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 947 transitions. [2022-12-13 19:21:25,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:25,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 947 transitions. [2022-12-13 19:21:25,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 135.28571428571428) internal successors, (947), 7 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:25,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 347.0) internal successors, (2776), 8 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:25,631 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 347.0) internal successors, (2776), 8 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:25,631 INFO L175 Difference]: Start difference. First operand has 226 places, 133 transitions, 1153 flow. Second operand 7 states and 947 transitions. [2022-12-13 19:21:25,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 332 transitions, 3352 flow [2022-12-13 19:22:08,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 332 transitions, 3334 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-12-13 19:22:08,715 INFO L231 Difference]: Finished difference. Result has 226 places, 133 transitions, 1188 flow [2022-12-13 19:22:08,715 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1188, PETRI_PLACES=226, PETRI_TRANSITIONS=133} [2022-12-13 19:22:08,716 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 169 predicate places. [2022-12-13 19:22:08,716 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 133 transitions, 1188 flow [2022-12-13 19:22:08,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 128.0) internal successors, (1536), 12 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:22:08,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:22:08,716 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:22:08,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-13 19:22:08,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:22:08,917 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:22:08,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:22:08,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1341820476, now seen corresponding path program 4 times [2022-12-13 19:22:08,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:22:08,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645974121] [2022-12-13 19:22:08,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:22:08,920 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 19:22:08,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:22:08,922 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:22:08,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-13 19:22:09,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:22:09,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:22:09,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 19:22:09,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:22:09,298 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:22:09,298 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 19:22:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:22:10,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:22:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:22:12,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:22:12,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645974121] [2022-12-13 19:22:12,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645974121] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:22:12,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:22:12,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 19:22:12,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333466420] [2022-12-13 19:22:12,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:22:12,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 19:22:12,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:22:12,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 19:22:12,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-12-13 19:22:41,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 347 [2022-12-13 19:22:41,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 133 transitions, 1188 flow. Second operand has 23 states, 23 states have (on average 135.30434782608697) internal successors, (3112), 23 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:22:41,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:22:41,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 347 [2022-12-13 19:22:41,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:23:34,303 INFO L130 PetriNetUnfolder]: 113882/157874 cut-off events. [2022-12-13 19:23:34,303 INFO L131 PetriNetUnfolder]: For 1460668/1483829 co-relation queries the response was YES. [2022-12-13 19:23:36,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823765 conditions, 157874 events. 113882/157874 cut-off events. For 1460668/1483829 co-relation queries the response was YES. Maximal size of possible extension queue 2867. Compared 1075197 event pairs, 40540 based on Foata normal form. 23955/181803 useless extension candidates. Maximal degree in co-relation 823683. Up to 68982 conditions per place. [2022-12-13 19:23:37,135 INFO L137 encePairwiseOnDemand]: 339/347 looper letters, 719 selfloop transitions, 39 changer transitions 0/768 dead transitions. [2022-12-13 19:23:37,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 768 transitions, 7298 flow [2022-12-13 19:23:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 19:23:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 19:23:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4630 transitions. [2022-12-13 19:23:37,143 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41696685878962536 [2022-12-13 19:23:37,143 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4630 transitions. [2022-12-13 19:23:37,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4630 transitions. [2022-12-13 19:23:37,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:23:37,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4630 transitions. [2022-12-13 19:23:37,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 144.6875) internal successors, (4630), 32 states have internal predecessors, (4630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:37,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:37,161 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:37,161 INFO L175 Difference]: Start difference. First operand has 226 places, 133 transitions, 1188 flow. Second operand 32 states and 4630 transitions. [2022-12-13 19:23:37,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 768 transitions, 7298 flow [2022-12-13 19:24:26,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 768 transitions, 7171 flow, removed 30 selfloop flow, removed 6 redundant places. [2022-12-13 19:24:26,566 INFO L231 Difference]: Finished difference. Result has 255 places, 143 transitions, 1376 flow [2022-12-13 19:24:26,566 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1376, PETRI_PLACES=255, PETRI_TRANSITIONS=143} [2022-12-13 19:24:26,566 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 198 predicate places. [2022-12-13 19:24:26,567 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 143 transitions, 1376 flow [2022-12-13 19:24:26,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 135.30434782608697) internal successors, (3112), 23 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:24:26,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:24:26,568 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:24:26,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-12-13 19:24:26,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:24:26,769 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 19:24:26,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:24:26,770 INFO L85 PathProgramCache]: Analyzing trace with hash 275619616, now seen corresponding path program 5 times [2022-12-13 19:24:26,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:24:26,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769333544] [2022-12-13 19:24:26,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:24:26,771 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 19:24:26,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:24:26,774 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -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 19:24:26,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d34369-2ede-4078-99ea-6c7e0cfc7730/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-13 19:24:26,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 19:24:26,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:24:26,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 19:24:26,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:24:27,106 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:24:27,107 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 19:24:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:24:28,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:24:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:24:30,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:24:30,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769333544] [2022-12-13 19:24:30,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769333544] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:24:30,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:24:30,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 19:24:30,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927075341] [2022-12-13 19:24:30,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:24:30,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 19:24:30,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:24:30,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 19:24:30,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-12-13 19:24:53,054 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 347 [2022-12-13 19:24:53,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 143 transitions, 1376 flow. Second operand has 24 states, 24 states have (on average 136.25) internal successors, (3270), 24 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:24:53,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:24:53,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 347 [2022-12-13 19:24:53,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand