./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/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_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/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_296a5797-54b0-4687-9494-878cf5d315c5/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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:13:16,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:13:16,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:13:16,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:13:16,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:13:16,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:13:16,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:13:16,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:13:16,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:13:16,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:13:16,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:13:16,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:13:16,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:13:16,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:13:16,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:13:16,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:13:16,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:13:16,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:13:16,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:13:16,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:13:16,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:13:16,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:13:16,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:13:16,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:13:16,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:13:16,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:13:16,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:13:16,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:13:16,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:13:16,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:13:16,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:13:16,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:13:16,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:13:16,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:13:16,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:13:16,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:13:16,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:13:16,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:13:16,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:13:16,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:13:16,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:13:16,336 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 18:13:16,349 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:13:16,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:13:16,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:13:16,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:13:16,350 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:13:16,350 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:13:16,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:13:16,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:13:16,351 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:13:16,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:13:16,351 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:13:16,351 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:13:16,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:13:16,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:13:16,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:13:16,351 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:13:16,352 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:13:16,352 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:13:16,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:13:16,352 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:13:16,352 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:13:16,352 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:13:16,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:13:16,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:13:16,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:13:16,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:13:16,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:13:16,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:13:16,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:13:16,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:13:16,353 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:13:16,353 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:13:16,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:13:16,353 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:13:16,353 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_296a5797-54b0-4687-9494-878cf5d315c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 [2022-12-13 18:13:16,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:13:16,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:13:16,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:13:16,543 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:13:16,543 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:13:16,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-12-13 18:13:19,200 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:13:19,344 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:13:19,345 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-12-13 18:13:19,349 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/data/33f5a0b62/b047088bbc6940f4a7d3706034fe299c/FLAGcf9b1d2b5 [2022-12-13 18:13:19,359 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/data/33f5a0b62/b047088bbc6940f4a7d3706034fe299c [2022-12-13 18:13:19,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:13:19,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:13:19,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:13:19,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:13:19,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:13:19,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:13:19" (1/1) ... [2022-12-13 18:13:19,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a76e7cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:19, skipping insertion in model container [2022-12-13 18:13:19,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:13:19" (1/1) ... [2022-12-13 18:13:19,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:13:19,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:13:19,508 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:13:19,509 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:13:19,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:13:19,511 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:13:19,511 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:13:19,512 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:13:19,517 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_296a5797-54b0-4687-9494-878cf5d315c5/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2022-12-13 18:13:19,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:13:19,532 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-13 18:13:19,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d8d1e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:19, skipping insertion in model container [2022-12-13 18:13:19,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:13:19,533 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 18:13:19,534 INFO L158 Benchmark]: Toolchain (without parser) took 171.47ms. Allocated memory is still 142.6MB. Free memory was 107.9MB in the beginning and 97.8MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 18:13:19,534 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 142.6MB. Free memory is still 117.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 18:13:19,534 INFO L158 Benchmark]: CACSL2BoogieTranslator took 169.49ms. Allocated memory is still 142.6MB. Free memory was 107.9MB in the beginning and 97.8MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 18:13:19,535 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 142.6MB. Free memory is still 117.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 169.49ms. Allocated memory is still 142.6MB. Free memory was 107.9MB in the beginning and 97.8MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/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_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/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_296a5797-54b0-4687-9494-878cf5d315c5/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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:13:21,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:13:21,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:13:21,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:13:21,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:13:21,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:13:21,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:13:21,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:13:21,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:13:21,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:13:21,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:13:21,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:13:21,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:13:21,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:13:21,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:13:21,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:13:21,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:13:21,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:13:21,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:13:21,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:13:21,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:13:21,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:13:21,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:13:21,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:13:21,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:13:21,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:13:21,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:13:21,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:13:21,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:13:21,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:13:21,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:13:21,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:13:21,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:13:21,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:13:21,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:13:21,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:13:21,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:13:21,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:13:21,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:13:21,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:13:21,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:13:21,227 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 18:13:21,251 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:13:21,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:13:21,252 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:13:21,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:13:21,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:13:21,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:13:21,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:13:21,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:13:21,253 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:13:21,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:13:21,254 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:13:21,254 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:13:21,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:13:21,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:13:21,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:13:21,254 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:13:21,255 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:13:21,255 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:13:21,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:13:21,255 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:13:21,255 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 18:13:21,255 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 18:13:21,256 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:13:21,256 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:13:21,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:13:21,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:13:21,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:13:21,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:13:21,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:13:21,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:13:21,257 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 18:13:21,257 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 18:13:21,257 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:13:21,258 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:13:21,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:13:21,258 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 18:13:21,258 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:13:21,258 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_296a5797-54b0-4687-9494-878cf5d315c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 [2022-12-13 18:13:21,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:13:21,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:13:21,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:13:21,505 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:13:21,505 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:13:21,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-12-13 18:13:24,048 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:13:24,215 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:13:24,215 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-12-13 18:13:24,222 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/data/14f0dad11/146ffb594c6644d1b44993b57c1868f6/FLAG5d56d31ba [2022-12-13 18:13:24,233 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/data/14f0dad11/146ffb594c6644d1b44993b57c1868f6 [2022-12-13 18:13:24,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:13:24,236 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:13:24,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:13:24,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:13:24,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:13:24,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:13:24" (1/1) ... [2022-12-13 18:13:24,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ebced82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:24, skipping insertion in model container [2022-12-13 18:13:24,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:13:24" (1/1) ... [2022-12-13 18:13:24,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:13:24,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:13:24,374 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:13:24,380 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:13:24,382 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:13:24,383 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:13:24,383 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:13:24,384 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:13:24,391 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_296a5797-54b0-4687-9494-878cf5d315c5/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2022-12-13 18:13:24,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:13:24,408 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 18:13:24,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:13:24,415 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:13:24,416 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:13:24,417 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:13:24,417 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:13:24,417 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:13:24,418 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:13:24,421 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_296a5797-54b0-4687-9494-878cf5d315c5/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2022-12-13 18:13:24,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:13:24,426 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:13:24,437 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:13:24,438 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:13:24,439 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:13:24,439 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:13:24,439 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:13:24,440 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:13:24,443 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_296a5797-54b0-4687-9494-878cf5d315c5/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2022-12-13 18:13:24,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:13:24,456 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:13:24,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:24 WrapperNode [2022-12-13 18:13:24,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:13:24,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:13:24,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:13:24,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:13:24,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:24" (1/1) ... [2022-12-13 18:13:24,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:24" (1/1) ... [2022-12-13 18:13:24,486 INFO L138 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 149 [2022-12-13 18:13:24,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:13:24,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:13:24,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:13:24,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:13:24,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:24" (1/1) ... [2022-12-13 18:13:24,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:24" (1/1) ... [2022-12-13 18:13:24,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:24" (1/1) ... [2022-12-13 18:13:24,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:24" (1/1) ... [2022-12-13 18:13:24,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:24" (1/1) ... [2022-12-13 18:13:24,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:24" (1/1) ... [2022-12-13 18:13:24,508 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:24" (1/1) ... [2022-12-13 18:13:24,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:24" (1/1) ... [2022-12-13 18:13:24,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:13:24,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:13:24,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:13:24,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:13:24,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:24" (1/1) ... [2022-12-13 18:13:24,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:13:24,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:13:24,539 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:13:24,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:13:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:13:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 18:13:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:13:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 18:13:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 18:13:24,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 18:13:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 18:13:24,575 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 18:13:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 18:13:24,575 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 18:13:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 18:13:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 18:13:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 18:13:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:13:24,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:13:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:13:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 18:13:24,577 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 18:13:24,678 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:13:24,681 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:13:25,181 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:13:25,246 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:13:25,247 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 18:13:25,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:13:25 BoogieIcfgContainer [2022-12-13 18:13:25,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:13:25,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:13:25,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:13:25,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:13:25,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:13:24" (1/3) ... [2022-12-13 18:13:25,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f2a48f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:13:25, skipping insertion in model container [2022-12-13 18:13:25,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:24" (2/3) ... [2022-12-13 18:13:25,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f2a48f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:13:25, skipping insertion in model container [2022-12-13 18:13:25,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:13:25" (3/3) ... [2022-12-13 18:13:25,258 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2022-12-13 18:13:25,276 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:13:25,276 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-12-13 18:13:25,277 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:13:25,371 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 18:13:25,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 261 transitions, 546 flow [2022-12-13 18:13:25,493 INFO L130 PetriNetUnfolder]: 20/258 cut-off events. [2022-12-13 18:13:25,493 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 18:13:25,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 258 events. 20/258 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 292 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 206. Up to 3 conditions per place. [2022-12-13 18:13:25,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 261 transitions, 546 flow [2022-12-13 18:13:25,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 253 transitions, 524 flow [2022-12-13 18:13:25,508 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:13:25,518 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 253 transitions, 524 flow [2022-12-13 18:13:25,520 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 253 transitions, 524 flow [2022-12-13 18:13:25,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 253 transitions, 524 flow [2022-12-13 18:13:25,564 INFO L130 PetriNetUnfolder]: 20/253 cut-off events. [2022-12-13 18:13:25,564 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 18:13:25,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 253 events. 20/253 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 289 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 206. Up to 3 conditions per place. [2022-12-13 18:13:25,568 INFO L119 LiptonReduction]: Number of co-enabled transitions 3482 [2022-12-13 18:13:53,859 INFO L134 LiptonReduction]: Checked pairs total: 6039 [2022-12-13 18:13:53,859 INFO L136 LiptonReduction]: Total number of compositions: 275 [2022-12-13 18:13:53,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:13:53,876 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;@fc02f14, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:13:53,877 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-12-13 18:13:53,879 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 18:13:53,879 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:13:53,879 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:53,880 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:13:53,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:13:53,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:53,885 INFO L85 PathProgramCache]: Analyzing trace with hash 31469, now seen corresponding path program 1 times [2022-12-13 18:13:53,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:13:53,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234235775] [2022-12-13 18:13:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:53,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:13:53,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:13:53,898 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:13:53,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 18:13:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:54,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:13:54,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:13:54,211 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:13:54,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:13:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:13:54,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:13:54,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:13:54,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234235775] [2022-12-13 18:13:54,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234235775] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:54,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:54,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:13:54,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823456081] [2022-12-13 18:13:54,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:54,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:54,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:13:54,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:54,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:54,519 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 536 [2022-12-13 18:13:54,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:54,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:13:54,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 536 [2022-12-13 18:13:54,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:13:57,361 INFO L130 PetriNetUnfolder]: 19283/23884 cut-off events. [2022-12-13 18:13:57,361 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2022-12-13 18:13:57,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48059 conditions, 23884 events. 19283/23884 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 2221. Compared 116978 event pairs, 9222 based on Foata normal form. 0/5466 useless extension candidates. Maximal degree in co-relation 21804. Up to 11865 conditions per place. [2022-12-13 18:13:57,460 INFO L137 encePairwiseOnDemand]: 526/536 looper letters, 106 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2022-12-13 18:13:57,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 115 transitions, 490 flow [2022-12-13 18:13:57,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:13:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 777 transitions. [2022-12-13 18:13:57,474 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4832089552238806 [2022-12-13 18:13:57,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 777 transitions. [2022-12-13 18:13:57,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 777 transitions. [2022-12-13 18:13:57,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:13:57,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 777 transitions. [2022-12-13 18:13:57,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:57,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:57,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:57,491 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 142 flow. Second operand 3 states and 777 transitions. [2022-12-13 18:13:57,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 115 transitions, 490 flow [2022-12-13 18:13:57,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 115 transitions, 466 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 18:13:57,515 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 178 flow [2022-12-13 18:13:57,516 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2022-12-13 18:13:57,519 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2022-12-13 18:13:57,519 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 178 flow [2022-12-13 18:13:57,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:57,519 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:57,520 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:13:57,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:13:57,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:13:57,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:13:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:57,721 INFO L85 PathProgramCache]: Analyzing trace with hash 31468, now seen corresponding path program 1 times [2022-12-13 18:13:57,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:13:57,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383208744] [2022-12-13 18:13:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:57,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:13:57,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:13:57,724 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:13:57,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 18:13:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:57,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:13:57,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:13:57,900 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:13:57,900 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 15 treesize of output 50 [2022-12-13 18:13:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:13:57,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:13:57,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:13:57,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383208744] [2022-12-13 18:13:57,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383208744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:57,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:57,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:13:57,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575701859] [2022-12-13 18:13:57,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:57,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:57,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:13:57,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:57,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:58,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 536 [2022-12-13 18:13:58,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:58,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:13:58,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 536 [2022-12-13 18:13:58,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:00,201 INFO L130 PetriNetUnfolder]: 19283/23878 cut-off events. [2022-12-13 18:14:00,201 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-12-13 18:14:00,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47782 conditions, 23878 events. 19283/23878 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 2221. Compared 116891 event pairs, 9222 based on Foata normal form. 4/5259 useless extension candidates. Maximal degree in co-relation 23871. Up to 23718 conditions per place. [2022-12-13 18:14:00,272 INFO L137 encePairwiseOnDemand]: 532/536 looper letters, 59 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2022-12-13 18:14:00,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 292 flow [2022-12-13 18:14:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:00,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:14:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 718 transitions. [2022-12-13 18:14:00,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4465174129353234 [2022-12-13 18:14:00,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 718 transitions. [2022-12-13 18:14:00,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 718 transitions. [2022-12-13 18:14:00,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:14:00,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 718 transitions. [2022-12-13 18:14:00,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.33333333333334) internal successors, (718), 3 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:00,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:00,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:00,279 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 178 flow. Second operand 3 states and 718 transitions. [2022-12-13 18:14:00,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 292 flow [2022-12-13 18:14:00,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 63 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:14:00,281 INFO L231 Difference]: Finished difference. Result has 59 places, 63 transitions, 162 flow [2022-12-13 18:14:00,281 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=59, PETRI_TRANSITIONS=63} [2022-12-13 18:14:00,281 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2022-12-13 18:14:00,281 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 63 transitions, 162 flow [2022-12-13 18:14:00,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:00,282 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:00,282 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 18:14:00,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 18:14:00,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:14:00,482 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:14:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:00,483 INFO L85 PathProgramCache]: Analyzing trace with hash 981402, now seen corresponding path program 1 times [2022-12-13 18:14:00,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:14:00,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740482208] [2022-12-13 18:14:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:00,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:14:00,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:14:00,484 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:14:00,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 18:14:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:00,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:14:00,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:00,642 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:14:00,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:14:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:00,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:14:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:00,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:14:00,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740482208] [2022-12-13 18:14:00,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740482208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:14:00,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:14:00,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 18:14:00,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363925258] [2022-12-13 18:14:00,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:14:00,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:14:00,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:14:00,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:14:00,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:14:02,240 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 536 [2022-12-13 18:14:02,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 63 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:02,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:02,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 536 [2022-12-13 18:14:02,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:07,170 INFO L130 PetriNetUnfolder]: 28934/35831 cut-off events. [2022-12-13 18:14:07,170 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-12-13 18:14:07,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71699 conditions, 35831 events. 28934/35831 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 3112. Compared 182210 event pairs, 13833 based on Foata normal form. 0/8318 useless extension candidates. Maximal degree in co-relation 71691. Up to 11863 conditions per place. [2022-12-13 18:14:07,286 INFO L137 encePairwiseOnDemand]: 524/536 looper letters, 146 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2022-12-13 18:14:07,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 176 transitions, 776 flow [2022-12-13 18:14:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:14:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:14:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1412 transitions. [2022-12-13 18:14:07,290 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43905472636815923 [2022-12-13 18:14:07,290 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1412 transitions. [2022-12-13 18:14:07,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1412 transitions. [2022-12-13 18:14:07,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:14:07,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1412 transitions. [2022-12-13 18:14:07,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 235.33333333333334) internal successors, (1412), 6 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:07,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 536.0) internal successors, (3752), 7 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:07,297 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 536.0) internal successors, (3752), 7 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:07,297 INFO L175 Difference]: Start difference. First operand has 59 places, 63 transitions, 162 flow. Second operand 6 states and 1412 transitions. [2022-12-13 18:14:07,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 176 transitions, 776 flow [2022-12-13 18:14:07,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 176 transitions, 775 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:14:07,300 INFO L231 Difference]: Finished difference. Result has 67 places, 84 transitions, 365 flow [2022-12-13 18:14:07,300 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=365, PETRI_PLACES=67, PETRI_TRANSITIONS=84} [2022-12-13 18:14:07,300 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2022-12-13 18:14:07,301 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 84 transitions, 365 flow [2022-12-13 18:14:07,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:07,301 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:07,301 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:14:07,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 18:14:07,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:14:07,503 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:14:07,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:07,503 INFO L85 PathProgramCache]: Analyzing trace with hash 30473197, now seen corresponding path program 1 times [2022-12-13 18:14:07,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:14:07,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854245300] [2022-12-13 18:14:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:07,504 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 18:14:07,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:14:07,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:14:07,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 18:14:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:07,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:14:07,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:07,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:14:07,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:14:07,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:14:07,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:14:07,711 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-13 18:14:07,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-13 18:14:07,734 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 18:14:07,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 18:14:07,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:14:07,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:14:07,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:14:07,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:14:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:07,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:07,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:14:07,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854245300] [2022-12-13 18:14:07,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854245300] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:07,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:14:07,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:14:07,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416864947] [2022-12-13 18:14:07,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:07,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:14:07,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:14:07,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:14:07,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:14:08,140 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 536 [2022-12-13 18:14:08,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 84 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:08,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:08,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 536 [2022-12-13 18:14:08,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:10,334 INFO L130 PetriNetUnfolder]: 22362/27960 cut-off events. [2022-12-13 18:14:10,334 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-12-13 18:14:10,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56031 conditions, 27960 events. 22362/27960 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 2341. Compared 142657 event pairs, 10683 based on Foata normal form. 0/6689 useless extension candidates. Maximal degree in co-relation 56018. Up to 27720 conditions per place. [2022-12-13 18:14:10,425 INFO L137 encePairwiseOnDemand]: 533/536 looper letters, 76 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2022-12-13 18:14:10,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 499 flow [2022-12-13 18:14:10,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:14:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 736 transitions. [2022-12-13 18:14:10,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4577114427860697 [2022-12-13 18:14:10,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 736 transitions. [2022-12-13 18:14:10,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 736 transitions. [2022-12-13 18:14:10,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:14:10,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 736 transitions. [2022-12-13 18:14:10,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:10,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:10,431 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:10,432 INFO L175 Difference]: Start difference. First operand has 67 places, 84 transitions, 365 flow. Second operand 3 states and 736 transitions. [2022-12-13 18:14:10,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 499 flow [2022-12-13 18:14:10,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 469 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 18:14:10,434 INFO L231 Difference]: Finished difference. Result has 66 places, 80 transitions, 317 flow [2022-12-13 18:14:10,434 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=66, PETRI_TRANSITIONS=80} [2022-12-13 18:14:10,434 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2022-12-13 18:14:10,434 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 80 transitions, 317 flow [2022-12-13 18:14:10,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:10,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:10,435 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:14:10,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 18:14:10,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:14:10,636 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:14:10,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash 30473196, now seen corresponding path program 1 times [2022-12-13 18:14:10,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:14:10,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038847671] [2022-12-13 18:14:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:10,636 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 18:14:10,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:14:10,637 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:14:10,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 18:14:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:10,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 18:14:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:10,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:14:10,812 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-13 18:14:10,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-12-13 18:14:11,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:14:11,027 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 18:14:11,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 18:14:11,258 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-12-13 18:14:11,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2022-12-13 18:14:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:13,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:13,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:14:13,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038847671] [2022-12-13 18:14:13,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038847671] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:13,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:14:13,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:14:13,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155523594] [2022-12-13 18:14:13,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:13,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:14:13,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:14:13,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:14:13,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-12-13 18:14:15,724 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 18:14:17,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 18:14:21,574 WARN L539 Checker$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 18:14:23,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 18:14:25,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 18:14:27,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 18:14:29,963 WARN L539 Checker$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 18:14:30,070 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 536 [2022-12-13 18:14:30,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 80 transitions, 317 flow. Second operand has 5 states, 5 states have (on average 190.8) internal successors, (954), 5 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:30,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:30,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 536 [2022-12-13 18:14:30,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:32,130 INFO L130 PetriNetUnfolder]: 15790/20089 cut-off events. [2022-12-13 18:14:32,130 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-12-13 18:14:32,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40263 conditions, 20089 events. 15790/20089 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 1518. Compared 104000 event pairs, 7533 based on Foata normal form. 0/5483 useless extension candidates. Maximal degree in co-relation 40249. Up to 19849 conditions per place. [2022-12-13 18:14:32,201 INFO L137 encePairwiseOnDemand]: 533/536 looper letters, 72 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2022-12-13 18:14:32,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 443 flow [2022-12-13 18:14:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:32,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:14:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2022-12-13 18:14:32,203 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38743781094527363 [2022-12-13 18:14:32,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2022-12-13 18:14:32,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2022-12-13 18:14:32,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:14:32,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2022-12-13 18:14:32,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:32,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:32,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:32,207 INFO L175 Difference]: Start difference. First operand has 66 places, 80 transitions, 317 flow. Second operand 3 states and 623 transitions. [2022-12-13 18:14:32,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 443 flow [2022-12-13 18:14:32,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:14:32,209 INFO L231 Difference]: Finished difference. Result has 65 places, 76 transitions, 298 flow [2022-12-13 18:14:32,209 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=65, PETRI_TRANSITIONS=76} [2022-12-13 18:14:32,209 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2022-12-13 18:14:32,210 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 76 transitions, 298 flow [2022-12-13 18:14:32,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.8) internal successors, (954), 5 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:32,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:32,210 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 18:14:32,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-13 18:14:32,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:14:32,411 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:14:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:32,411 INFO L85 PathProgramCache]: Analyzing trace with hash -822002131, now seen corresponding path program 2 times [2022-12-13 18:14:32,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:14:32,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123900509] [2022-12-13 18:14:32,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:14:32,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:14:32,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:14:32,413 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:14:32,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 18:14:32,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:14:32,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:14:32,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 18:14:32,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:32,571 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:14:32,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:14:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:32,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:14:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:33,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:14:33,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123900509] [2022-12-13 18:14:33,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123900509] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:14:33,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:14:33,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:14:33,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510836908] [2022-12-13 18:14:33,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:14:33,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:14:33,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:14:33,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:14:33,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:14:38,620 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 536 [2022-12-13 18:14:38,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 76 transitions, 298 flow. Second operand has 12 states, 12 states have (on average 209.0) internal successors, (2508), 12 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:38,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:38,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 536 [2022-12-13 18:14:38,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:42,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:14:44,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:14:46,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:14:48,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:14:50,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:14:52,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:14:55,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:15:03,743 INFO L130 PetriNetUnfolder]: 42095/53544 cut-off events. [2022-12-13 18:15:03,743 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2022-12-13 18:15:03,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107239 conditions, 53544 events. 42095/53544 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 2611. Compared 297019 event pairs, 20088 based on Foata normal form. 15/15113 useless extension candidates. Maximal degree in co-relation 107224. Up to 6628 conditions per place. [2022-12-13 18:15:03,960 INFO L137 encePairwiseOnDemand]: 526/536 looper letters, 344 selfloop transitions, 48 changer transitions 0/395 dead transitions. [2022-12-13 18:15:03,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 395 transitions, 1890 flow [2022-12-13 18:15:03,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:15:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 18:15:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2903 transitions. [2022-12-13 18:15:03,969 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45133706467661694 [2022-12-13 18:15:03,969 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2903 transitions. [2022-12-13 18:15:03,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2903 transitions. [2022-12-13 18:15:03,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:03,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2903 transitions. [2022-12-13 18:15:03,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 241.91666666666666) internal successors, (2903), 12 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:03,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 536.0) internal successors, (6968), 13 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:03,988 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 536.0) internal successors, (6968), 13 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:03,988 INFO L175 Difference]: Start difference. First operand has 65 places, 76 transitions, 298 flow. Second operand 12 states and 2903 transitions. [2022-12-13 18:15:03,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 395 transitions, 1890 flow [2022-12-13 18:15:03,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 395 transitions, 1889 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:15:03,995 INFO L231 Difference]: Finished difference. Result has 82 places, 103 transitions, 642 flow [2022-12-13 18:15:03,996 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=642, PETRI_PLACES=82, PETRI_TRANSITIONS=103} [2022-12-13 18:15:03,996 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 17 predicate places. [2022-12-13 18:15:03,996 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 103 transitions, 642 flow [2022-12-13 18:15:03,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 209.0) internal successors, (2508), 12 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:03,998 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:03,998 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:15:04,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-12-13 18:15:04,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:15:04,199 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:15:04,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:04,199 INFO L85 PathProgramCache]: Analyzing trace with hash -780008771, now seen corresponding path program 1 times [2022-12-13 18:15:04,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:15:04,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342928492] [2022-12-13 18:15:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:04,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:15:04,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:15:04,201 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:15:04,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 18:15:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:04,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 18:15:04,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:04,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:04,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:04,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:04,399 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 18:15:04,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-13 18:15:04,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 18:15:04,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:04,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:15:04,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:04,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:15:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:04,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:15:04,527 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:15:04,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342928492] [2022-12-13 18:15:04,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342928492] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:15:04,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:15:04,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:15:04,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151508839] [2022-12-13 18:15:04,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:15:04,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:15:04,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:15:04,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:15:04,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:15:04,779 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 536 [2022-12-13 18:15:04,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 103 transitions, 642 flow. Second operand has 4 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:04,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:04,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 536 [2022-12-13 18:15:04,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:09,130 INFO L130 PetriNetUnfolder]: 40439/51392 cut-off events. [2022-12-13 18:15:09,130 INFO L131 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2022-12-13 18:15:09,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103041 conditions, 51392 events. 40439/51392 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 2627. Compared 286218 event pairs, 19296 based on Foata normal form. 0/14262 useless extension candidates. Maximal degree in co-relation 103018. Up to 50752 conditions per place. [2022-12-13 18:15:09,339 INFO L137 encePairwiseOnDemand]: 533/536 looper letters, 97 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2022-12-13 18:15:09,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 101 transitions, 834 flow [2022-12-13 18:15:09,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:15:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:15:09,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 732 transitions. [2022-12-13 18:15:09,342 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4552238805970149 [2022-12-13 18:15:09,342 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 732 transitions. [2022-12-13 18:15:09,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 732 transitions. [2022-12-13 18:15:09,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:09,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 732 transitions. [2022-12-13 18:15:09,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:09,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:09,345 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:09,345 INFO L175 Difference]: Start difference. First operand has 82 places, 103 transitions, 642 flow. Second operand 3 states and 732 transitions. [2022-12-13 18:15:09,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 101 transitions, 834 flow [2022-12-13 18:15:09,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 740 flow, removed 22 selfloop flow, removed 4 redundant places. [2022-12-13 18:15:09,349 INFO L231 Difference]: Finished difference. Result has 78 places, 101 transitions, 546 flow [2022-12-13 18:15:09,349 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=546, PETRI_PLACES=78, PETRI_TRANSITIONS=101} [2022-12-13 18:15:09,349 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 13 predicate places. [2022-12-13 18:15:09,349 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 101 transitions, 546 flow [2022-12-13 18:15:09,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:09,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:09,350 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:15:09,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-12-13 18:15:09,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:15:09,551 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:15:09,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:09,552 INFO L85 PathProgramCache]: Analyzing trace with hash -780008772, now seen corresponding path program 1 times [2022-12-13 18:15:09,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:15:09,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717329618] [2022-12-13 18:15:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:09,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:15:09,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:15:09,557 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:15:09,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 18:15:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:09,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:15:09,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:09,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:09,719 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-13 18:15:09,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-12-13 18:15:09,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:09,886 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-12-13 18:15:09,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 18:15:14,034 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-13 18:15:14,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-12-13 18:15:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:16,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:15:16,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:15:16,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717329618] [2022-12-13 18:15:16,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717329618] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:15:16,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:15:16,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:15:16,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213064122] [2022-12-13 18:15:16,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:15:16,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:15:16,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:15:16,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:15:16,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2022-12-13 18:15:18,669 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 18:15:20,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 18:15:22,707 WARN L539 Checker$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 18:15:24,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 18:15:27,837 WARN L539 Checker$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 18:15:29,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 18:15:32,560 WARN L539 Checker$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 18:15:34,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 18:15:36,586 WARN L539 Checker$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 18:15:36,641 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 536 [2022-12-13 18:15:36,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 101 transitions, 546 flow. Second operand has 5 states, 5 states have (on average 191.2) internal successors, (956), 5 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:36,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:36,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 536 [2022-12-13 18:15:36,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:42,980 INFO L130 PetriNetUnfolder]: 38783/49240 cut-off events. [2022-12-13 18:15:42,980 INFO L131 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2022-12-13 18:15:43,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98682 conditions, 49240 events. 38783/49240 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 2401. Compared 270940 event pairs, 18504 based on Foata normal form. 0/13928 useless extension candidates. Maximal degree in co-relation 98658. Up to 48600 conditions per place. [2022-12-13 18:15:43,204 INFO L137 encePairwiseOnDemand]: 533/536 looper letters, 95 selfloop transitions, 1 changer transitions 0/99 dead transitions. [2022-12-13 18:15:43,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 734 flow [2022-12-13 18:15:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:15:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:15:43,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2022-12-13 18:15:43,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3849502487562189 [2022-12-13 18:15:43,207 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2022-12-13 18:15:43,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2022-12-13 18:15:43,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:43,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2022-12-13 18:15:43,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:43,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:43,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:43,210 INFO L175 Difference]: Start difference. First operand has 78 places, 101 transitions, 546 flow. Second operand 3 states and 619 transitions. [2022-12-13 18:15:43,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 734 flow [2022-12-13 18:15:43,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 99 transitions, 733 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:15:43,213 INFO L231 Difference]: Finished difference. Result has 77 places, 99 transitions, 543 flow [2022-12-13 18:15:43,213 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=543, PETRI_PLACES=77, PETRI_TRANSITIONS=99} [2022-12-13 18:15:43,214 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2022-12-13 18:15:43,214 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 99 transitions, 543 flow [2022-12-13 18:15:43,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 191.2) internal successors, (956), 5 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:43,214 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:43,214 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:43,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 18:15:43,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:15:43,415 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:15:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:43,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1589524694, now seen corresponding path program 1 times [2022-12-13 18:15:43,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:15:43,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455433619] [2022-12-13 18:15:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:43,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:15:43,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:15:43,421 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:15:43,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 18:15:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:43,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:15:43,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:43,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:15:43,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:15:43,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455433619] [2022-12-13 18:15:43,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455433619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:15:43,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:15:43,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:15:43,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991582683] [2022-12-13 18:15:43,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:15:43,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:15:43,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:15:43,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:15:43,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:15:43,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 536 [2022-12-13 18:15:43,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 99 transitions, 543 flow. Second operand has 5 states, 5 states have (on average 219.4) internal successors, (1097), 5 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:43,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:43,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 536 [2022-12-13 18:15:43,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:47,633 INFO L130 PetriNetUnfolder]: 30954/40683 cut-off events. [2022-12-13 18:15:47,633 INFO L131 PetriNetUnfolder]: For 220/220 co-relation queries the response was YES. [2022-12-13 18:15:47,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81592 conditions, 40683 events. 30954/40683 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 2187. Compared 238300 event pairs, 16826 based on Foata normal form. 2/13657 useless extension candidates. Maximal degree in co-relation 81567. Up to 37681 conditions per place. [2022-12-13 18:15:47,871 INFO L137 encePairwiseOnDemand]: 523/536 looper letters, 126 selfloop transitions, 27 changer transitions 0/155 dead transitions. [2022-12-13 18:15:47,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 155 transitions, 979 flow [2022-12-13 18:15:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:15:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:15:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1206 transitions. [2022-12-13 18:15:47,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45 [2022-12-13 18:15:47,877 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1206 transitions. [2022-12-13 18:15:47,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1206 transitions. [2022-12-13 18:15:47,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:47,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1206 transitions. [2022-12-13 18:15:47,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 241.2) internal successors, (1206), 5 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:47,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 536.0) internal successors, (3216), 6 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:47,887 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 536.0) internal successors, (3216), 6 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:47,887 INFO L175 Difference]: Start difference. First operand has 77 places, 99 transitions, 543 flow. Second operand 5 states and 1206 transitions. [2022-12-13 18:15:47,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 155 transitions, 979 flow [2022-12-13 18:15:47,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 155 transitions, 978 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:15:47,892 INFO L231 Difference]: Finished difference. Result has 83 places, 102 transitions, 655 flow [2022-12-13 18:15:47,893 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=655, PETRI_PLACES=83, PETRI_TRANSITIONS=102} [2022-12-13 18:15:47,893 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 18 predicate places. [2022-12-13 18:15:47,893 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 102 transitions, 655 flow [2022-12-13 18:15:47,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 219.4) internal successors, (1097), 5 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:47,894 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:47,894 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:47,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 18:15:48,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:15:48,096 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:15:48,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:48,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2030868007, now seen corresponding path program 1 times [2022-12-13 18:15:48,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:15:48,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563399678] [2022-12-13 18:15:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:48,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:15:48,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:15:48,098 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:15:48,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 18:15:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:48,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:15:48,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:48,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:48,283 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-13 18:15:48,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-13 18:15:48,342 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 152 treesize of output 144 [2022-12-13 18:15:48,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:48,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:15:48,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:48,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:15:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:48,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:15:48,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:15:48,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563399678] [2022-12-13 18:15:48,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563399678] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:15:48,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:15:48,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:15:48,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025628570] [2022-12-13 18:15:48,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:15:48,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:15:48,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:15:48,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:15:48,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:15:48,914 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 536 [2022-12-13 18:15:48,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 102 transitions, 655 flow. Second operand has 5 states, 5 states have (on average 226.6) internal successors, (1133), 5 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:48,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:48,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 536 [2022-12-13 18:15:48,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:53,918 INFO L130 PetriNetUnfolder]: 34179/43193 cut-off events. [2022-12-13 18:15:53,918 INFO L131 PetriNetUnfolder]: For 1262/1388 co-relation queries the response was YES. [2022-12-13 18:15:54,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95907 conditions, 43193 events. 34179/43193 cut-off events. For 1262/1388 co-relation queries the response was YES. Maximal size of possible extension queue 2146. Compared 235715 event pairs, 16038 based on Foata normal form. 126/14650 useless extension candidates. Maximal degree in co-relation 95878. Up to 42675 conditions per place. [2022-12-13 18:15:54,218 INFO L137 encePairwiseOnDemand]: 533/536 looper letters, 95 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2022-12-13 18:15:54,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 100 transitions, 843 flow [2022-12-13 18:15:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:15:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:15:54,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 722 transitions. [2022-12-13 18:15:54,220 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4490049751243781 [2022-12-13 18:15:54,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 722 transitions. [2022-12-13 18:15:54,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 722 transitions. [2022-12-13 18:15:54,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:54,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 722 transitions. [2022-12-13 18:15:54,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:54,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:54,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:54,229 INFO L175 Difference]: Start difference. First operand has 83 places, 102 transitions, 655 flow. Second operand 3 states and 722 transitions. [2022-12-13 18:15:54,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 100 transitions, 843 flow [2022-12-13 18:15:54,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 100 transitions, 812 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 18:15:54,258 INFO L231 Difference]: Finished difference. Result has 82 places, 100 transitions, 622 flow [2022-12-13 18:15:54,258 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=622, PETRI_PLACES=82, PETRI_TRANSITIONS=100} [2022-12-13 18:15:54,259 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 17 predicate places. [2022-12-13 18:15:54,259 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 100 transitions, 622 flow [2022-12-13 18:15:54,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 226.6) internal successors, (1133), 5 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:54,260 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:54,260 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:54,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 18:15:54,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:15:54,461 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:15:54,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:54,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2030868005, now seen corresponding path program 1 times [2022-12-13 18:15:54,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:15:54,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469462536] [2022-12-13 18:15:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:54,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:15:54,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:15:54,468 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:15:54,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 18:15:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:54,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 18:15:54,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:54,604 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 18:15:54,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-12-13 18:15:54,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:54,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 18:15:54,666 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 18:15:54,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 18:15:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:54,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:15:54,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:15:54,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469462536] [2022-12-13 18:15:54,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469462536] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:15:54,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:15:54,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:15:54,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465670934] [2022-12-13 18:15:54,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:15:54,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:15:54,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:15:54,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:15:54,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:15:54,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 536 [2022-12-13 18:15:54,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 100 transitions, 622 flow. Second operand has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:54,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:54,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 536 [2022-12-13 18:15:54,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:58,615 INFO L130 PetriNetUnfolder]: 32386/40830 cut-off events. [2022-12-13 18:15:58,615 INFO L131 PetriNetUnfolder]: For 1158/1275 co-relation queries the response was YES. [2022-12-13 18:15:58,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90545 conditions, 40830 events. 32386/40830 cut-off events. For 1158/1275 co-relation queries the response was YES. Maximal size of possible extension queue 2015. Compared 219836 event pairs, 15135 based on Foata normal form. 117/14177 useless extension candidates. Maximal degree in co-relation 90515. Up to 40312 conditions per place. [2022-12-13 18:15:58,822 INFO L137 encePairwiseOnDemand]: 533/536 looper letters, 93 selfloop transitions, 1 changer transitions 0/98 dead transitions. [2022-12-13 18:15:58,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 98 transitions, 806 flow [2022-12-13 18:15:58,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:15:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:15:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 714 transitions. [2022-12-13 18:15:58,824 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44402985074626866 [2022-12-13 18:15:58,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 714 transitions. [2022-12-13 18:15:58,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 714 transitions. [2022-12-13 18:15:58,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:58,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 714 transitions. [2022-12-13 18:15:58,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:58,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:58,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:58,827 INFO L175 Difference]: Start difference. First operand has 82 places, 100 transitions, 622 flow. Second operand 3 states and 714 transitions. [2022-12-13 18:15:58,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 98 transitions, 806 flow [2022-12-13 18:15:58,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 98 transitions, 805 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:15:58,843 INFO L231 Difference]: Finished difference. Result has 81 places, 98 transitions, 619 flow [2022-12-13 18:15:58,843 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=619, PETRI_PLACES=81, PETRI_TRANSITIONS=98} [2022-12-13 18:15:58,843 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 16 predicate places. [2022-12-13 18:15:58,844 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 98 transitions, 619 flow [2022-12-13 18:15:58,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:58,844 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:58,844 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:58,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 18:15:59,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:15:59,045 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:15:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1467608868, now seen corresponding path program 1 times [2022-12-13 18:15:59,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:15:59,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840596704] [2022-12-13 18:15:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:59,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:15:59,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:15:59,048 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:15:59,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 18:15:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:59,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:15:59,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:59,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:15:59,183 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:15:59,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840596704] [2022-12-13 18:15:59,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840596704] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:15:59,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:15:59,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:15:59,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611874049] [2022-12-13 18:15:59,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:15:59,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:15:59,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:15:59,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:15:59,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:15:59,367 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 536 [2022-12-13 18:15:59,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 98 transitions, 619 flow. Second operand has 5 states, 5 states have (on average 219.8) internal successors, (1099), 5 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:59,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:59,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 536 [2022-12-13 18:15:59,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:16:03,331 INFO L130 PetriNetUnfolder]: 25505/33709 cut-off events. [2022-12-13 18:16:03,331 INFO L131 PetriNetUnfolder]: For 1853/1895 co-relation queries the response was YES. [2022-12-13 18:16:03,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76016 conditions, 33709 events. 25505/33709 cut-off events. For 1853/1895 co-relation queries the response was YES. Maximal size of possible extension queue 1901. Compared 197462 event pairs, 14611 based on Foata normal form. 42/14109 useless extension candidates. Maximal degree in co-relation 75985. Up to 32739 conditions per place. [2022-12-13 18:16:03,515 INFO L137 encePairwiseOnDemand]: 521/536 looper letters, 102 selfloop transitions, 27 changer transitions 0/132 dead transitions. [2022-12-13 18:16:03,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 132 transitions, 959 flow [2022-12-13 18:16:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:16:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:16:03,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1182 transitions. [2022-12-13 18:16:03,518 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44104477611940296 [2022-12-13 18:16:03,518 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1182 transitions. [2022-12-13 18:16:03,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1182 transitions. [2022-12-13 18:16:03,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:16:03,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1182 transitions. [2022-12-13 18:16:03,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 236.4) internal successors, (1182), 5 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:03,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 536.0) internal successors, (3216), 6 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:03,522 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 536.0) internal successors, (3216), 6 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:03,522 INFO L175 Difference]: Start difference. First operand has 81 places, 98 transitions, 619 flow. Second operand 5 states and 1182 transitions. [2022-12-13 18:16:03,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 132 transitions, 959 flow [2022-12-13 18:16:03,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 132 transitions, 958 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:16:03,537 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 695 flow [2022-12-13 18:16:03,537 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=695, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2022-12-13 18:16:03,537 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 21 predicate places. [2022-12-13 18:16:03,538 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 695 flow [2022-12-13 18:16:03,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 219.8) internal successors, (1099), 5 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:03,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:16:03,538 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:16:03,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 18:16:03,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:16:03,739 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:16:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:16:03,739 INFO L85 PathProgramCache]: Analyzing trace with hash 785723389, now seen corresponding path program 1 times [2022-12-13 18:16:03,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:16:03,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46155552] [2022-12-13 18:16:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:16:03,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:16:03,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:16:03,741 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:16:03,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 18:16:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:16:03,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:16:03,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:16:03,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 18:16:03,929 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 18:16:03,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 18:16:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:16:03,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:16:03,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:16:03,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46155552] [2022-12-13 18:16:03,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46155552] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:16:03,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:16:03,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:16:03,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710761180] [2022-12-13 18:16:03,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:16:03,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:16:03,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:16:03,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:16:03,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:16:04,083 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 536 [2022-12-13 18:16:04,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 695 flow. Second operand has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:04,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:16:04,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 536 [2022-12-13 18:16:04,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:16:07,096 INFO L130 PetriNetUnfolder]: 24994/31494 cut-off events. [2022-12-13 18:16:07,096 INFO L131 PetriNetUnfolder]: For 2055/2118 co-relation queries the response was YES. [2022-12-13 18:16:07,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78276 conditions, 31494 events. 24994/31494 cut-off events. For 2055/2118 co-relation queries the response was YES. Maximal size of possible extension queue 1666. Compared 165328 event pairs, 11519 based on Foata normal form. 63/13082 useless extension candidates. Maximal degree in co-relation 78242. Up to 31109 conditions per place. [2022-12-13 18:16:07,261 INFO L137 encePairwiseOnDemand]: 532/536 looper letters, 80 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2022-12-13 18:16:07,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 97 transitions, 871 flow [2022-12-13 18:16:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:16:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:16:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 907 transitions. [2022-12-13 18:16:07,264 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4230410447761194 [2022-12-13 18:16:07,264 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 907 transitions. [2022-12-13 18:16:07,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 907 transitions. [2022-12-13 18:16:07,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:16:07,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 907 transitions. [2022-12-13 18:16:07,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.75) internal successors, (907), 4 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:07,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 536.0) internal successors, (2680), 5 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:07,268 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 536.0) internal successors, (2680), 5 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:07,268 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 695 flow. Second operand 4 states and 907 transitions. [2022-12-13 18:16:07,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 97 transitions, 871 flow [2022-12-13 18:16:07,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 97 transitions, 822 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:16:07,319 INFO L231 Difference]: Finished difference. Result has 85 places, 97 transitions, 662 flow [2022-12-13 18:16:07,319 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=662, PETRI_PLACES=85, PETRI_TRANSITIONS=97} [2022-12-13 18:16:07,320 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2022-12-13 18:16:07,320 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 97 transitions, 662 flow [2022-12-13 18:16:07,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:07,320 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:16:07,320 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:16:07,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 18:16:07,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:16:07,522 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:16:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:16:07,523 INFO L85 PathProgramCache]: Analyzing trace with hash 785723262, now seen corresponding path program 1 times [2022-12-13 18:16:07,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:16:07,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993556490] [2022-12-13 18:16:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:16:07,525 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:16:07,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:16:07,528 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:16:07,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 18:16:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:16:07,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 18:16:07,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:16:07,788 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:16:07,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:16:07,902 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:16:07,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:16:08,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:16:08,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:16:08,033 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:16:08,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:16:08,079 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-13 18:16:08,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:16:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:16:08,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:16:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:16:10,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:16:10,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993556490] [2022-12-13 18:16:10,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993556490] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:16:10,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:16:10,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:16:10,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234702958] [2022-12-13 18:16:10,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:16:10,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:16:10,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:16:10,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:16:10,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:16:18,016 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 536 [2022-12-13 18:16:18,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 97 transitions, 662 flow. Second operand has 12 states, 12 states have (on average 192.66666666666666) internal successors, (2312), 12 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:18,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:16:18,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 536 [2022-12-13 18:16:18,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:16:33,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:16:35,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:16:59,597 INFO L130 PetriNetUnfolder]: 60861/78309 cut-off events. [2022-12-13 18:16:59,597 INFO L131 PetriNetUnfolder]: For 7550/7598 co-relation queries the response was YES. [2022-12-13 18:16:59,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192074 conditions, 78309 events. 60861/78309 cut-off events. For 7550/7598 co-relation queries the response was YES. Maximal size of possible extension queue 3934. Compared 488464 event pairs, 18029 based on Foata normal form. 168/34559 useless extension candidates. Maximal degree in co-relation 192040. Up to 23803 conditions per place. [2022-12-13 18:17:00,059 INFO L137 encePairwiseOnDemand]: 520/536 looper letters, 437 selfloop transitions, 90 changer transitions 0/530 dead transitions. [2022-12-13 18:17:00,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 530 transitions, 3196 flow [2022-12-13 18:17:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 18:17:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 18:17:00,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5076 transitions. [2022-12-13 18:17:00,069 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.394589552238806 [2022-12-13 18:17:00,069 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5076 transitions. [2022-12-13 18:17:00,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5076 transitions. [2022-12-13 18:17:00,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:00,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5076 transitions. [2022-12-13 18:17:00,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 211.5) internal successors, (5076), 24 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:00,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 536.0) internal successors, (13400), 25 states have internal predecessors, (13400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:00,086 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 536.0) internal successors, (13400), 25 states have internal predecessors, (13400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:00,086 INFO L175 Difference]: Start difference. First operand has 85 places, 97 transitions, 662 flow. Second operand 24 states and 5076 transitions. [2022-12-13 18:17:00,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 530 transitions, 3196 flow [2022-12-13 18:17:00,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 530 transitions, 3173 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:17:00,261 INFO L231 Difference]: Finished difference. Result has 114 places, 157 transitions, 1283 flow [2022-12-13 18:17:00,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1283, PETRI_PLACES=114, PETRI_TRANSITIONS=157} [2022-12-13 18:17:00,262 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 49 predicate places. [2022-12-13 18:17:00,262 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 157 transitions, 1283 flow [2022-12-13 18:17:00,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 192.66666666666666) internal successors, (2312), 12 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:00,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:00,262 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:17:00,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 18:17:00,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:00,464 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:17:00,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:00,465 INFO L85 PathProgramCache]: Analyzing trace with hash 785723261, now seen corresponding path program 1 times [2022-12-13 18:17:00,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:00,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068306306] [2022-12-13 18:17:00,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:00,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:00,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:00,469 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:00,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 18:17:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:00,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:17:00,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:00,686 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:17:00,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:17:00,720 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 18:17:00,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 18:17:00,736 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 18:17:00,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 18:17:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:17:00,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:17:00,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:00,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068306306] [2022-12-13 18:17:00,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068306306] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:17:00,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:17:00,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:17:00,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443861125] [2022-12-13 18:17:00,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:17:00,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:17:00,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:00,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:17:00,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:17:00,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 536 [2022-12-13 18:17:00,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 157 transitions, 1283 flow. Second operand has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:00,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:00,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 536 [2022-12-13 18:17:00,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:07,062 INFO L130 PetriNetUnfolder]: 44423/56665 cut-off events. [2022-12-13 18:17:07,062 INFO L131 PetriNetUnfolder]: For 36684/38958 co-relation queries the response was YES. [2022-12-13 18:17:07,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157424 conditions, 56665 events. 44423/56665 cut-off events. For 36684/38958 co-relation queries the response was YES. Maximal size of possible extension queue 2687. Compared 334147 event pairs, 21629 based on Foata normal form. 4510/32631 useless extension candidates. Maximal degree in co-relation 157382. Up to 56168 conditions per place. [2022-12-13 18:17:07,471 INFO L137 encePairwiseOnDemand]: 532/536 looper letters, 132 selfloop transitions, 12 changer transitions 0/155 dead transitions. [2022-12-13 18:17:07,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 155 transitions, 1563 flow [2022-12-13 18:17:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:17:07,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:17:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 901 transitions. [2022-12-13 18:17:07,474 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42024253731343286 [2022-12-13 18:17:07,474 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 901 transitions. [2022-12-13 18:17:07,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 901 transitions. [2022-12-13 18:17:07,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:07,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 901 transitions. [2022-12-13 18:17:07,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.25) internal successors, (901), 4 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:07,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 536.0) internal successors, (2680), 5 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:07,477 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 536.0) internal successors, (2680), 5 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:07,477 INFO L175 Difference]: Start difference. First operand has 114 places, 157 transitions, 1283 flow. Second operand 4 states and 901 transitions. [2022-12-13 18:17:07,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 155 transitions, 1563 flow [2022-12-13 18:17:08,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 155 transitions, 1449 flow, removed 28 selfloop flow, removed 4 redundant places. [2022-12-13 18:17:08,126 INFO L231 Difference]: Finished difference. Result has 111 places, 155 transitions, 1185 flow [2022-12-13 18:17:08,126 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1185, PETRI_PLACES=111, PETRI_TRANSITIONS=155} [2022-12-13 18:17:08,127 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 46 predicate places. [2022-12-13 18:17:08,127 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 155 transitions, 1185 flow [2022-12-13 18:17:08,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:08,127 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:08,127 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:17:08,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-13 18:17:08,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:08,329 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:17:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:08,330 INFO L85 PathProgramCache]: Analyzing trace with hash 785723388, now seen corresponding path program 1 times [2022-12-13 18:17:08,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:08,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074591274] [2022-12-13 18:17:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:08,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:08,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:08,334 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:08,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 18:17:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:08,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 18:17:08,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:08,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 18:17:08,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 18:17:08,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:08,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:17:08,614 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:17:08,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:17:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:17:08,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:17:10,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:17:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:17:11,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:11,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074591274] [2022-12-13 18:17:11,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074591274] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:17:11,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:17:11,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:17:11,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407952845] [2022-12-13 18:17:11,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:17:11,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:17:11,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:17:11,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:17:13,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:17:15,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:17:17,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:17:20,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:17:22,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:17:24,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:17:29,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:17:31,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 18:17:33,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:17:36,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:17:38,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:17:41,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:17:43,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 18:17:45,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:17:48,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:17:48,341 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 536 [2022-12-13 18:17:48,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 155 transitions, 1185 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:48,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:48,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 536 [2022-12-13 18:17:48,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:18:00,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:18:09,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:18:13,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:18:23,989 INFO L130 PetriNetUnfolder]: 67001/86581 cut-off events. [2022-12-13 18:18:23,989 INFO L131 PetriNetUnfolder]: For 49339/49439 co-relation queries the response was YES. [2022-12-13 18:18:24,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230197 conditions, 86581 events. 67001/86581 cut-off events. For 49339/49439 co-relation queries the response was YES. Maximal size of possible extension queue 4073. Compared 548712 event pairs, 20589 based on Foata normal form. 105/44820 useless extension candidates. Maximal degree in co-relation 230156. Up to 25371 conditions per place. [2022-12-13 18:18:24,577 INFO L137 encePairwiseOnDemand]: 523/536 looper letters, 363 selfloop transitions, 87 changer transitions 0/453 dead transitions. [2022-12-13 18:18:24,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 453 transitions, 3033 flow [2022-12-13 18:18:24,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 18:18:24,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 18:18:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5188 transitions. [2022-12-13 18:18:24,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35848535102266443 [2022-12-13 18:18:24,588 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5188 transitions. [2022-12-13 18:18:24,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5188 transitions. [2022-12-13 18:18:24,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:18:24,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5188 transitions. [2022-12-13 18:18:24,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 192.14814814814815) internal successors, (5188), 27 states have internal predecessors, (5188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:24,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 536.0) internal successors, (15008), 28 states have internal predecessors, (15008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:24,606 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 536.0) internal successors, (15008), 28 states have internal predecessors, (15008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:24,606 INFO L175 Difference]: Start difference. First operand has 111 places, 155 transitions, 1185 flow. Second operand 27 states and 5188 transitions. [2022-12-13 18:18:24,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 453 transitions, 3033 flow [2022-12-13 18:18:24,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 453 transitions, 3020 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:18:24,827 INFO L231 Difference]: Finished difference. Result has 141 places, 165 transitions, 1469 flow [2022-12-13 18:18:24,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1469, PETRI_PLACES=141, PETRI_TRANSITIONS=165} [2022-12-13 18:18:24,828 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 76 predicate places. [2022-12-13 18:18:24,828 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 165 transitions, 1469 flow [2022-12-13 18:18:24,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:24,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:18:24,828 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:18:24,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 18:18:25,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:18:25,030 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:18:25,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:18:25,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1614857121, now seen corresponding path program 1 times [2022-12-13 18:18:25,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:18:25,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746488887] [2022-12-13 18:18:25,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:18:25,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:18:25,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:18:25,035 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:18:25,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 18:18:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:18:25,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:18:25,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:18:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:18:25,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:18:25,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:18:25,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746488887] [2022-12-13 18:18:25,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746488887] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:18:25,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:18:25,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:18:25,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479447090] [2022-12-13 18:18:25,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:18:25,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:18:25,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:18:25,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:18:25,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:18:25,291 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 536 [2022-12-13 18:18:25,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 165 transitions, 1469 flow. Second operand has 4 states, 4 states have (on average 234.75) internal successors, (939), 4 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:25,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:18:25,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 536 [2022-12-13 18:18:25,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:18:40,663 INFO L130 PetriNetUnfolder]: 91388/128425 cut-off events. [2022-12-13 18:18:40,663 INFO L131 PetriNetUnfolder]: For 130823/139380 co-relation queries the response was YES. [2022-12-13 18:18:41,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363858 conditions, 128425 events. 91388/128425 cut-off events. For 130823/139380 co-relation queries the response was YES. Maximal size of possible extension queue 6252. Compared 1019507 event pairs, 32471 based on Foata normal form. 5701/86758 useless extension candidates. Maximal degree in co-relation 363811. Up to 54803 conditions per place. [2022-12-13 18:18:41,810 INFO L137 encePairwiseOnDemand]: 530/536 looper letters, 258 selfloop transitions, 5 changer transitions 0/276 dead transitions. [2022-12-13 18:18:41,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 276 transitions, 2588 flow [2022-12-13 18:18:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:18:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:18:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1019 transitions. [2022-12-13 18:18:41,812 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47527985074626866 [2022-12-13 18:18:41,812 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1019 transitions. [2022-12-13 18:18:41,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1019 transitions. [2022-12-13 18:18:41,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:18:41,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1019 transitions. [2022-12-13 18:18:41,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 254.75) internal successors, (1019), 4 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:41,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 536.0) internal successors, (2680), 5 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:41,816 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 536.0) internal successors, (2680), 5 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:41,816 INFO L175 Difference]: Start difference. First operand has 141 places, 165 transitions, 1469 flow. Second operand 4 states and 1019 transitions. [2022-12-13 18:18:41,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 276 transitions, 2588 flow [2022-12-13 18:18:42,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 276 transitions, 2561 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-12-13 18:18:42,736 INFO L231 Difference]: Finished difference. Result has 143 places, 169 transitions, 1483 flow [2022-12-13 18:18:42,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1483, PETRI_PLACES=143, PETRI_TRANSITIONS=169} [2022-12-13 18:18:42,737 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 78 predicate places. [2022-12-13 18:18:42,737 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 169 transitions, 1483 flow [2022-12-13 18:18:42,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.75) internal successors, (939), 4 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:42,737 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:18:42,737 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:18:42,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 18:18:42,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:18:42,938 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:18:42,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:18:42,939 INFO L85 PathProgramCache]: Analyzing trace with hash -826549696, now seen corresponding path program 1 times [2022-12-13 18:18:42,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:18:42,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993279086] [2022-12-13 18:18:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:18:42,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:18:42,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:18:42,944 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:18:42,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 18:18:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:18:43,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 18:18:43,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:18:43,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 18:18:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:18:43,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:18:43,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:18:43,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993279086] [2022-12-13 18:18:43,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993279086] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:18:43,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:18:43,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:18:43,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256260387] [2022-12-13 18:18:43,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:18:43,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:18:43,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:18:43,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:18:43,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:18:43,294 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 536 [2022-12-13 18:18:43,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 169 transitions, 1483 flow. Second operand has 4 states, 4 states have (on average 219.75) internal successors, (879), 4 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:43,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:18:43,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 536 [2022-12-13 18:18:43,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:18:55,325 INFO L130 PetriNetUnfolder]: 68709/96214 cut-off events. [2022-12-13 18:18:55,325 INFO L131 PetriNetUnfolder]: For 95629/103403 co-relation queries the response was YES. [2022-12-13 18:18:55,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290375 conditions, 96214 events. 68709/96214 cut-off events. For 95629/103403 co-relation queries the response was YES. Maximal size of possible extension queue 4710. Compared 733015 event pairs, 49906 based on Foata normal form. 5744/76014 useless extension candidates. Maximal degree in co-relation 290325. Up to 95625 conditions per place. [2022-12-13 18:18:56,159 INFO L137 encePairwiseOnDemand]: 532/536 looper letters, 143 selfloop transitions, 9 changer transitions 0/167 dead transitions. [2022-12-13 18:18:56,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 167 transitions, 1779 flow [2022-12-13 18:18:56,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:18:56,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:18:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 907 transitions. [2022-12-13 18:18:56,162 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4230410447761194 [2022-12-13 18:18:56,162 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 907 transitions. [2022-12-13 18:18:56,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 907 transitions. [2022-12-13 18:18:56,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:18:56,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 907 transitions. [2022-12-13 18:18:56,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.75) internal successors, (907), 4 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:56,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 536.0) internal successors, (2680), 5 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:56,165 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 536.0) internal successors, (2680), 5 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:56,165 INFO L175 Difference]: Start difference. First operand has 143 places, 169 transitions, 1483 flow. Second operand 4 states and 907 transitions. [2022-12-13 18:18:56,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 167 transitions, 1779 flow [2022-12-13 18:18:56,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 167 transitions, 1779 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 18:18:56,956 INFO L231 Difference]: Finished difference. Result has 144 places, 167 transitions, 1493 flow [2022-12-13 18:18:56,956 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1493, PETRI_PLACES=144, PETRI_TRANSITIONS=167} [2022-12-13 18:18:56,956 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 79 predicate places. [2022-12-13 18:18:56,956 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 167 transitions, 1493 flow [2022-12-13 18:18:56,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.75) internal successors, (879), 4 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:56,957 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:18:56,957 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:18:56,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 18:18:57,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:18:57,158 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:18:57,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:18:57,159 INFO L85 PathProgramCache]: Analyzing trace with hash -826549693, now seen corresponding path program 1 times [2022-12-13 18:18:57,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:18:57,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404528721] [2022-12-13 18:18:57,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:18:57,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:18:57,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:18:57,163 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:18:57,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 18:18:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:18:57,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 18:18:57,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:18:57,468 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:18:57,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:18:57,592 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:18:57,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:18:57,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:18:57,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:18:57,700 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:18:57,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:18:57,748 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-13 18:18:57,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:18:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:18:57,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:19:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:19:02,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:19:02,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404528721] [2022-12-13 18:19:02,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404528721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:19:02,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:19:02,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:19:02,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488642915] [2022-12-13 18:19:02,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:19:02,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:19:02,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:19:02,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:19:02,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:19:04,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:19:12,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:19:14,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 536 [2022-12-13 18:19:14,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 167 transitions, 1493 flow. Second operand has 12 states, 12 states have (on average 194.0) internal successors, (2328), 12 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:14,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:19:14,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 536 [2022-12-13 18:19:14,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:19:20,462 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 36 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:19:29,474 WARN L233 SmtUtils]: Spent 7.54s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:20:07,352 INFO L130 PetriNetUnfolder]: 72581/101518 cut-off events. [2022-12-13 18:20:07,353 INFO L131 PetriNetUnfolder]: For 143781/151958 co-relation queries the response was YES. [2022-12-13 18:20:07,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306388 conditions, 101518 events. 72581/101518 cut-off events. For 143781/151958 co-relation queries the response was YES. Maximal size of possible extension queue 4194. Compared 743804 event pairs, 25497 based on Foata normal form. 6011/82526 useless extension candidates. Maximal degree in co-relation 306336. Up to 19107 conditions per place. [2022-12-13 18:20:08,227 INFO L137 encePairwiseOnDemand]: 520/536 looper letters, 429 selfloop transitions, 94 changer transitions 0/536 dead transitions. [2022-12-13 18:20:08,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 536 transitions, 4050 flow [2022-12-13 18:20:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 18:20:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 18:20:08,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5035 transitions. [2022-12-13 18:20:08,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3914023631840796 [2022-12-13 18:20:08,236 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5035 transitions. [2022-12-13 18:20:08,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5035 transitions. [2022-12-13 18:20:08,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:08,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5035 transitions. [2022-12-13 18:20:08,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 209.79166666666666) internal successors, (5035), 24 states have internal predecessors, (5035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:08,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 536.0) internal successors, (13400), 25 states have internal predecessors, (13400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:08,250 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 536.0) internal successors, (13400), 25 states have internal predecessors, (13400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:08,250 INFO L175 Difference]: Start difference. First operand has 144 places, 167 transitions, 1493 flow. Second operand 24 states and 5035 transitions. [2022-12-13 18:20:08,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 536 transitions, 4050 flow [2022-12-13 18:20:08,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 536 transitions, 4035 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:20:08,711 INFO L231 Difference]: Finished difference. Result has 169 places, 205 transitions, 1921 flow [2022-12-13 18:20:08,711 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1921, PETRI_PLACES=169, PETRI_TRANSITIONS=205} [2022-12-13 18:20:08,711 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 104 predicate places. [2022-12-13 18:20:08,711 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 205 transitions, 1921 flow [2022-12-13 18:20:08,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 194.0) internal successors, (2328), 12 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:08,712 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:08,712 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:20:08,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 18:20:08,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:20:08,913 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:20:08,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:08,914 INFO L85 PathProgramCache]: Analyzing trace with hash -834113912, now seen corresponding path program 1 times [2022-12-13 18:20:08,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:20:08,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990164840] [2022-12-13 18:20:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:08,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:20:08,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:20:08,918 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:20:08,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 18:20:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:09,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 18:20:09,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:20:09,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:20:09,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:20:09,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990164840] [2022-12-13 18:20:09,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990164840] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:09,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:20:09,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:20:09,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848797655] [2022-12-13 18:20:09,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:09,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:20:09,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:20:09,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:20:09,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:20:10,665 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 536 [2022-12-13 18:20:10,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 205 transitions, 1921 flow. Second operand has 12 states, 12 states have (on average 213.0) internal successors, (2556), 12 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:10,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:10,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 536 [2022-12-13 18:20:10,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:23,846 INFO L130 PetriNetUnfolder]: 61995/86958 cut-off events. [2022-12-13 18:20:23,846 INFO L131 PetriNetUnfolder]: For 197173/204814 co-relation queries the response was YES. [2022-12-13 18:20:24,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294404 conditions, 86958 events. 61995/86958 cut-off events. For 197173/204814 co-relation queries the response was YES. Maximal size of possible extension queue 3969. Compared 644874 event pairs, 25456 based on Foata normal form. 6753/75032 useless extension candidates. Maximal degree in co-relation 294348. Up to 46652 conditions per place. [2022-12-13 18:20:24,629 INFO L137 encePairwiseOnDemand]: 520/536 looper letters, 274 selfloop transitions, 77 changer transitions 0/361 dead transitions. [2022-12-13 18:20:24,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 361 transitions, 3365 flow [2022-12-13 18:20:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 18:20:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 18:20:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3128 transitions. [2022-12-13 18:20:24,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4168443496801706 [2022-12-13 18:20:24,635 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3128 transitions. [2022-12-13 18:20:24,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3128 transitions. [2022-12-13 18:20:24,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:24,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3128 transitions. [2022-12-13 18:20:24,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 223.42857142857142) internal successors, (3128), 14 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:24,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 536.0) internal successors, (8040), 15 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:24,648 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 536.0) internal successors, (8040), 15 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:24,648 INFO L175 Difference]: Start difference. First operand has 169 places, 205 transitions, 1921 flow. Second operand 14 states and 3128 transitions. [2022-12-13 18:20:24,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 361 transitions, 3365 flow [2022-12-13 18:20:25,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 361 transitions, 3205 flow, removed 48 selfloop flow, removed 9 redundant places. [2022-12-13 18:20:25,443 INFO L231 Difference]: Finished difference. Result has 175 places, 201 transitions, 2007 flow [2022-12-13 18:20:25,443 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2007, PETRI_PLACES=175, PETRI_TRANSITIONS=201} [2022-12-13 18:20:25,443 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 110 predicate places. [2022-12-13 18:20:25,443 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 201 transitions, 2007 flow [2022-12-13 18:20:25,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 213.0) internal successors, (2556), 12 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:25,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:25,444 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:20:25,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 18:20:25,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:20:25,645 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:20:25,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:25,646 INFO L85 PathProgramCache]: Analyzing trace with hash -826549691, now seen corresponding path program 1 times [2022-12-13 18:20:25,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:20:25,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250718724] [2022-12-13 18:20:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:25,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:20:25,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:20:25,651 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:20:25,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 18:20:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:25,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 18:20:25,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:26,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 18:20:26,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 18:20:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:20:26,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:20:26,067 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:20:26,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:20:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:20:26,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:29,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:20:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:20:29,281 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:20:29,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250718724] [2022-12-13 18:20:29,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250718724] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:29,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:20:29,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:20:29,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220730326] [2022-12-13 18:20:29,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:29,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:20:29,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:20:29,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:20:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:20:33,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:35,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:38,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:40,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:42,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:45,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:47,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:50,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 18:20:53,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:55,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:58,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:00,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:03,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:05,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:07,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:09,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:09,479 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 536 [2022-12-13 18:21:09,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 201 transitions, 2007 flow. Second operand has 12 states, 12 states have (on average 180.0) internal successors, (2160), 12 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:09,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:21:09,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 536 [2022-12-13 18:21:09,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:21:36,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:50,816 INFO L130 PetriNetUnfolder]: 56141/78724 cut-off events. [2022-12-13 18:21:50,816 INFO L131 PetriNetUnfolder]: For 180965/187083 co-relation queries the response was YES. [2022-12-13 18:21:51,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268432 conditions, 78724 events. 56141/78724 cut-off events. For 180965/187083 co-relation queries the response was YES. Maximal size of possible extension queue 3414. Compared 566386 event pairs, 16936 based on Foata normal form. 4330/68680 useless extension candidates. Maximal degree in co-relation 268375. Up to 23860 conditions per place. [2022-12-13 18:21:51,589 INFO L137 encePairwiseOnDemand]: 522/536 looper letters, 369 selfloop transitions, 105 changer transitions 0/487 dead transitions. [2022-12-13 18:21:51,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 487 transitions, 4167 flow [2022-12-13 18:21:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 18:21:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 18:21:51,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5337 transitions. [2022-12-13 18:21:51,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3556103411513859 [2022-12-13 18:21:51,597 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5337 transitions. [2022-12-13 18:21:51,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5337 transitions. [2022-12-13 18:21:51,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:21:51,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5337 transitions. [2022-12-13 18:21:51,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 190.60714285714286) internal successors, (5337), 28 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:51,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 536.0) internal successors, (15544), 29 states have internal predecessors, (15544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:51,612 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 536.0) internal successors, (15544), 29 states have internal predecessors, (15544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:51,612 INFO L175 Difference]: Start difference. First operand has 175 places, 201 transitions, 2007 flow. Second operand 28 states and 5337 transitions. [2022-12-13 18:21:51,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 487 transitions, 4167 flow [2022-12-13 18:21:52,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 487 transitions, 4057 flow, removed 16 selfloop flow, removed 5 redundant places. [2022-12-13 18:21:52,660 INFO L231 Difference]: Finished difference. Result has 206 places, 209 transitions, 2308 flow [2022-12-13 18:21:52,661 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=1903, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2308, PETRI_PLACES=206, PETRI_TRANSITIONS=209} [2022-12-13 18:21:52,661 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 141 predicate places. [2022-12-13 18:21:52,661 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 209 transitions, 2308 flow [2022-12-13 18:21:52,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.0) internal successors, (2160), 12 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:52,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:21:52,661 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:21:52,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:21:52,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:21:52,863 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:21:52,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:21:52,864 INFO L85 PathProgramCache]: Analyzing trace with hash -826549695, now seen corresponding path program 1 times [2022-12-13 18:21:52,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:21:52,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937488198] [2022-12-13 18:21:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:21:52,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:21:52,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:21:52,868 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:21:52,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 18:21:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:21:52,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:21:52,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:21:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:21:53,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:21:53,218 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 18:21:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:21:53,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:21:53,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937488198] [2022-12-13 18:21:53,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937488198] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:21:53,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:21:53,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 18:21:53,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144752675] [2022-12-13 18:21:53,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:21:53,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 18:21:53,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:21:53,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 18:21:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:21:55,533 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 536 [2022-12-13 18:21:55,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 209 transitions, 2308 flow. Second operand has 10 states, 10 states have (on average 212.0) internal successors, (2120), 10 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:55,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:21:55,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 536 [2022-12-13 18:21:55,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:22:05,990 INFO L130 PetriNetUnfolder]: 48761/68648 cut-off events. [2022-12-13 18:22:05,990 INFO L131 PetriNetUnfolder]: For 186760/191991 co-relation queries the response was YES. [2022-12-13 18:22:06,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251768 conditions, 68648 events. 48761/68648 cut-off events. For 186760/191991 co-relation queries the response was YES. Maximal size of possible extension queue 2862. Compared 485686 event pairs, 20426 based on Foata normal form. 6355/64288 useless extension candidates. Maximal degree in co-relation 251702. Up to 33948 conditions per place. [2022-12-13 18:22:06,731 INFO L137 encePairwiseOnDemand]: 526/536 looper letters, 212 selfloop transitions, 83 changer transitions 0/308 dead transitions. [2022-12-13 18:22:06,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 308 transitions, 3340 flow [2022-12-13 18:22:06,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:22:06,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 18:22:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2032 transitions. [2022-12-13 18:22:06,734 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42122719734660036 [2022-12-13 18:22:06,734 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2032 transitions. [2022-12-13 18:22:06,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2032 transitions. [2022-12-13 18:22:06,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:22:06,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2032 transitions. [2022-12-13 18:22:06,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.77777777777777) internal successors, (2032), 9 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:22:06,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 536.0) internal successors, (5360), 10 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:22:06,740 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 536.0) internal successors, (5360), 10 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:22:06,740 INFO L175 Difference]: Start difference. First operand has 206 places, 209 transitions, 2308 flow. Second operand 9 states and 2032 transitions. [2022-12-13 18:22:06,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 308 transitions, 3340 flow [2022-12-13 18:22:08,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 308 transitions, 3176 flow, removed 4 selfloop flow, removed 19 redundant places. [2022-12-13 18:22:08,084 INFO L231 Difference]: Finished difference. Result has 196 places, 203 transitions, 2306 flow [2022-12-13 18:22:08,085 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2306, PETRI_PLACES=196, PETRI_TRANSITIONS=203} [2022-12-13 18:22:08,085 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 131 predicate places. [2022-12-13 18:22:08,085 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 203 transitions, 2306 flow [2022-12-13 18:22:08,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 212.0) internal successors, (2120), 10 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:22:08,085 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:22:08,085 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 18:22:08,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 18:22:08,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:22:08,287 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:22:08,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:22:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash 996054797, now seen corresponding path program 3 times [2022-12-13 18:22:08,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:22:08,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600309802] [2022-12-13 18:22:08,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:22:08,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:22:08,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:22:08,292 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:22:08,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 18:22:08,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 18:22:08,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:22:08,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 18:22:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:22:08,595 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:22:08,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:22:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:22:08,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:22:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:22:11,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:22:11,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600309802] [2022-12-13 18:22:11,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600309802] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:22:11,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:22:11,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 18:22:11,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779788492] [2022-12-13 18:22:11,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:22:11,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 18:22:11,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:22:11,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 18:22:11,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 18:22:38,751 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 536 [2022-12-13 18:22:38,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 203 transitions, 2306 flow. Second operand has 24 states, 24 states have (on average 209.0) internal successors, (5016), 24 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:22:38,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:22:38,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 536 [2022-12-13 18:22:38,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:22:52,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:22:54,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:22:56,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:22:58,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:00,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:02,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:04,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:06,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:07,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:09,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:15,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:17,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:19,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:21,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:23,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:25,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:27,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:29,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:30,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:32,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:36,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:23:56,938 INFO L130 PetriNetUnfolder]: 73977/105114 cut-off events. [2022-12-13 18:23:56,939 INFO L131 PetriNetUnfolder]: For 391513/418375 co-relation queries the response was YES. [2022-12-13 18:23:57,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392490 conditions, 105114 events. 73977/105114 cut-off events. For 391513/418375 co-relation queries the response was YES. Maximal size of possible extension queue 3518. Compared 782659 event pairs, 52544 based on Foata normal form. 16791/106461 useless extension candidates. Maximal degree in co-relation 392427. Up to 18229 conditions per place. [2022-12-13 18:23:57,986 INFO L137 encePairwiseOnDemand]: 526/536 looper letters, 585 selfloop transitions, 115 changer transitions 0/724 dead transitions. [2022-12-13 18:23:57,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 724 transitions, 7220 flow [2022-12-13 18:23:57,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 18:23:57,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 18:23:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 5696 transitions. [2022-12-13 18:23:57,993 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42507462686567166 [2022-12-13 18:23:57,993 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 5696 transitions. [2022-12-13 18:23:57,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 5696 transitions. [2022-12-13 18:23:57,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:23:57,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 5696 transitions. [2022-12-13 18:23:58,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 227.84) internal successors, (5696), 25 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:23:58,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 536.0) internal successors, (13936), 26 states have internal predecessors, (13936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:23:58,009 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 536.0) internal successors, (13936), 26 states have internal predecessors, (13936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:23:58,009 INFO L175 Difference]: Start difference. First operand has 196 places, 203 transitions, 2306 flow. Second operand 25 states and 5696 transitions. [2022-12-13 18:23:58,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 724 transitions, 7220 flow [2022-12-13 18:24:00,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 724 transitions, 7149 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-13 18:24:00,127 INFO L231 Difference]: Finished difference. Result has 234 places, 246 transitions, 3225 flow [2022-12-13 18:24:00,128 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3225, PETRI_PLACES=234, PETRI_TRANSITIONS=246} [2022-12-13 18:24:00,128 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 169 predicate places. [2022-12-13 18:24:00,128 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 246 transitions, 3225 flow [2022-12-13 18:24:00,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 209.0) internal successors, (5016), 24 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:24:00,128 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:24:00,129 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:24:00,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-13 18:24:00,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:24:00,330 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:24:00,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:24:00,331 INFO L85 PathProgramCache]: Analyzing trace with hash -2116341877, now seen corresponding path program 2 times [2022-12-13 18:24:00,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:24:00,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833938796] [2022-12-13 18:24:00,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:24:00,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:24:00,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:24:00,335 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:24:00,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 18:24:00,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 18:24:00,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:24:00,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 18:24:00,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:24:00,560 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:24:00,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:24:00,663 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:24:00,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:24:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:24:00,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:24:00,751 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:24:00,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:24:00,783 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-13 18:24:00,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:24:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:24:00,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:24:00,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:24:00,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833938796] [2022-12-13 18:24:00,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833938796] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:24:00,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:24:00,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:24:00,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255220478] [2022-12-13 18:24:00,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:24:00,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:24:00,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:24:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:24:00,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:24:01,342 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 536 [2022-12-13 18:24:01,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 246 transitions, 3225 flow. Second operand has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:24:01,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:24:01,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 536 [2022-12-13 18:24:01,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:24:19,160 INFO L130 PetriNetUnfolder]: 79365/111930 cut-off events. [2022-12-13 18:24:19,160 INFO L131 PetriNetUnfolder]: For 396144/418252 co-relation queries the response was YES. [2022-12-13 18:24:20,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409998 conditions, 111930 events. 79365/111930 cut-off events. For 396144/418252 co-relation queries the response was YES. Maximal size of possible extension queue 3310. Compared 802730 event pairs, 29883 based on Foata normal form. 16094/111284 useless extension candidates. Maximal degree in co-relation 409919. Up to 70783 conditions per place. [2022-12-13 18:24:20,527 INFO L137 encePairwiseOnDemand]: 531/536 looper letters, 246 selfloop transitions, 44 changer transitions 0/303 dead transitions. [2022-12-13 18:24:20,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 303 transitions, 4263 flow [2022-12-13 18:24:20,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:24:20,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:24:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1118 transitions. [2022-12-13 18:24:20,530 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4171641791044776 [2022-12-13 18:24:20,530 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1118 transitions. [2022-12-13 18:24:20,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1118 transitions. [2022-12-13 18:24:20,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:24:20,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1118 transitions. [2022-12-13 18:24:20,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 223.6) internal successors, (1118), 5 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:24:20,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 536.0) internal successors, (3216), 6 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:24:20,533 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 536.0) internal successors, (3216), 6 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:24:20,534 INFO L175 Difference]: Start difference. First operand has 234 places, 246 transitions, 3225 flow. Second operand 5 states and 1118 transitions. [2022-12-13 18:24:20,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 303 transitions, 4263 flow [2022-12-13 18:24:24,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 303 transitions, 4059 flow, removed 43 selfloop flow, removed 5 redundant places. [2022-12-13 18:24:24,242 INFO L231 Difference]: Finished difference. Result has 234 places, 246 transitions, 3131 flow [2022-12-13 18:24:24,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3131, PETRI_PLACES=234, PETRI_TRANSITIONS=246} [2022-12-13 18:24:24,243 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 169 predicate places. [2022-12-13 18:24:24,243 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 246 transitions, 3131 flow [2022-12-13 18:24:24,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:24:24,243 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:24:24,243 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:24:24,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 18:24:24,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:24:24,444 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:24:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:24:24,445 INFO L85 PathProgramCache]: Analyzing trace with hash 146767953, now seen corresponding path program 1 times [2022-12-13 18:24:24,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:24:24,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654042949] [2022-12-13 18:24:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:24:24,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:24:24,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:24:24,450 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:24:24,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-13 18:24:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:24:24,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 18:24:24,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:24:24,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 18:24:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:24:24,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:24:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:24:25,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:24:25,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654042949] [2022-12-13 18:24:25,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654042949] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:24:25,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:24:25,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:24:25,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835727403] [2022-12-13 18:24:25,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:24:25,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:24:25,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:24:25,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:24:25,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:24:29,432 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 536 [2022-12-13 18:24:29,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 246 transitions, 3131 flow. Second operand has 12 states, 12 states have (on average 218.16666666666666) internal successors, (2618), 12 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:24:29,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:24:29,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 536 [2022-12-13 18:24:29,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:25:09,634 INFO L130 PetriNetUnfolder]: 162848/228405 cut-off events. [2022-12-13 18:25:09,634 INFO L131 PetriNetUnfolder]: For 616138/636964 co-relation queries the response was YES. [2022-12-13 18:25:11,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 847787 conditions, 228405 events. 162848/228405 cut-off events. For 616138/636964 co-relation queries the response was YES. Maximal size of possible extension queue 6152. Compared 1751405 event pairs, 30117 based on Foata normal form. 24024/221487 useless extension candidates. Maximal degree in co-relation 847706. Up to 57752 conditions per place. [2022-12-13 18:25:12,897 INFO L137 encePairwiseOnDemand]: 530/536 looper letters, 383 selfloop transitions, 48 changer transitions 0/444 dead transitions. [2022-12-13 18:25:12,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 444 transitions, 5280 flow [2022-12-13 18:25:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:25:12,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 18:25:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1852 transitions. [2022-12-13 18:25:12,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4319029850746269 [2022-12-13 18:25:12,901 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1852 transitions. [2022-12-13 18:25:12,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1852 transitions. [2022-12-13 18:25:12,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:25:12,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1852 transitions. [2022-12-13 18:25:12,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 231.5) internal successors, (1852), 8 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:12,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 536.0) internal successors, (4824), 9 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:12,905 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 536.0) internal successors, (4824), 9 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:12,906 INFO L175 Difference]: Start difference. First operand has 234 places, 246 transitions, 3131 flow. Second operand 8 states and 1852 transitions. [2022-12-13 18:25:12,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 444 transitions, 5280 flow [2022-12-13 18:25:25,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 444 transitions, 5098 flow, removed 5 selfloop flow, removed 5 redundant places. [2022-12-13 18:25:25,874 INFO L231 Difference]: Finished difference. Result has 240 places, 251 transitions, 3271 flow [2022-12-13 18:25:25,874 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=536, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3271, PETRI_PLACES=240, PETRI_TRANSITIONS=251} [2022-12-13 18:25:25,874 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 175 predicate places. [2022-12-13 18:25:25,874 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 251 transitions, 3271 flow [2022-12-13 18:25:25,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 218.16666666666666) internal successors, (2618), 12 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:25,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:25:25,875 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:25,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 18:25:26,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:25:26,076 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 18:25:26,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:26,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1394471014, now seen corresponding path program 1 times [2022-12-13 18:25:26,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:25:26,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552929194] [2022-12-13 18:25:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:26,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:25:26,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:25:26,081 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:25:26,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296a5797-54b0-4687-9494-878cf5d315c5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-13 18:25:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:26,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:25:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:25:26,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:25:26,203 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:25:26,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552929194] [2022-12-13 18:25:26,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552929194] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:26,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:26,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:25:26,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329970886] [2022-12-13 18:25:26,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:26,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:25:26,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:25:26,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:25:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:25:26,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 536 [2022-12-13 18:25:26,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 251 transitions, 3271 flow. Second operand has 5 states, 5 states have (on average 231.6) internal successors, (1158), 5 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:26,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:25:26,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 536 [2022-12-13 18:25:26,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:26:16,982 INFO L130 PetriNetUnfolder]: 214982/297671 cut-off events. [2022-12-13 18:26:16,982 INFO L131 PetriNetUnfolder]: For 903759/944732 co-relation queries the response was YES. [2022-12-13 18:26:20,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1158493 conditions, 297671 events. 214982/297671 cut-off events. For 903759/944732 co-relation queries the response was YES. Maximal size of possible extension queue 7893. Compared 2256369 event pairs, 18385 based on Foata normal form. 38089/293486 useless extension candidates. Maximal degree in co-relation 1158409. Up to 180149 conditions per place. [2022-12-13 18:26:21,157 INFO L137 encePairwiseOnDemand]: 529/536 looper letters, 389 selfloop transitions, 34 changer transitions 0/445 dead transitions. [2022-12-13 18:26:21,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 445 transitions, 5502 flow [2022-12-13 18:26:21,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:26:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:26:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1487 transitions. [2022-12-13 18:26:21,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46237562189054726 [2022-12-13 18:26:21,160 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1487 transitions. [2022-12-13 18:26:21,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1487 transitions. [2022-12-13 18:26:21,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:26:21,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1487 transitions. [2022-12-13 18:26:21,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 247.83333333333334) internal successors, (1487), 6 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:26:21,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 536.0) internal successors, (3752), 7 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:26:21,167 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 536.0) internal successors, (3752), 7 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:26:21,167 INFO L175 Difference]: Start difference. First operand has 240 places, 251 transitions, 3271 flow. Second operand 6 states and 1487 transitions. [2022-12-13 18:26:21,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 445 transitions, 5502 flow