./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/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_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/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_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --- 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 13:51:18,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:51:18,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:51:18,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:51:18,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:51:18,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:51:18,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:51:18,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:51:18,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:51:18,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:51:18,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:51:18,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:51:18,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:51:18,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:51:18,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:51:18,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:51:18,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:51:18,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:51:18,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:51:18,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:51:18,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:51:18,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:51:18,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:51:18,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:51:18,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:51:18,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:51:18,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:51:18,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:51:18,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:51:18,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:51:18,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:51:18,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:51:18,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:51:18,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:51:18,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:51:18,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:51:18,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:51:18,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:51:18,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:51:18,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:51:18,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:51:18,637 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 13:51:18,650 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:51:18,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:51:18,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:51:18,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:51:18,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:51:18,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:51:18,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:51:18,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:51:18,652 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:51:18,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:51:18,652 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:51:18,652 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:51:18,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:51:18,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:51:18,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:51:18,653 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:51:18,653 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:51:18,653 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:51:18,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:51:18,653 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:51:18,653 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:51:18,653 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:51:18,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:51:18,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:51:18,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:51:18,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:51:18,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:51:18,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:51:18,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:51:18,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:51:18,654 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:51:18,654 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:51:18,654 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:51:18,654 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:51:18,655 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_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d [2022-12-13 13:51:18,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:51:18,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:51:18,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:51:18,838 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:51:18,838 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:51:18,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-12-13 13:51:21,493 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:51:21,651 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:51:21,651 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-12-13 13:51:21,657 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/data/26bd64cf5/9ec1520d970941628408aaae8fe0d2ac/FLAG6318d1995 [2022-12-13 13:51:21,669 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/data/26bd64cf5/9ec1520d970941628408aaae8fe0d2ac [2022-12-13 13:51:21,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:51:21,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:51:21,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:51:21,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:51:21,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:51:21,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:51:21" (1/1) ... [2022-12-13 13:51:21,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d2e5c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:21, skipping insertion in model container [2022-12-13 13:51:21,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:51:21" (1/1) ... [2022-12-13 13:51:21,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:51:21,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:51:21,843 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_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-12-13 13:51:21,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:51:21,860 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 13:51:21,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@51b14785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:21, skipping insertion in model container [2022-12-13 13:51:21,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:51:21,861 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 13:51:21,862 INFO L158 Benchmark]: Toolchain (without parser) took 189.77ms. Allocated memory is still 148.9MB. Free memory was 112.0MB in the beginning and 101.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 13:51:21,863 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 148.9MB. Free memory is still 117.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:51:21,863 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.89ms. Allocated memory is still 148.9MB. Free memory was 111.5MB in the beginning and 101.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 13:51:21,864 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 148.9MB. Free memory is still 117.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 187.89ms. Allocated memory is still 148.9MB. Free memory was 111.5MB in the beginning and 101.5MB 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: 151]: 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_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/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_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/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_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --- 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 13:51:23,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:51:23,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:51:23,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:51:23,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:51:23,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:51:23,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:51:23,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:51:23,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:51:23,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:51:23,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:51:23,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:51:23,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:51:23,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:51:23,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:51:23,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:51:23,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:51:23,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:51:23,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:51:23,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:51:23,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:51:23,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:51:23,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:51:23,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:51:23,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:51:23,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:51:23,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:51:23,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:51:23,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:51:23,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:51:23,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:51:23,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:51:23,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:51:23,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:51:23,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:51:23,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:51:23,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:51:23,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:51:23,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:51:23,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:51:23,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:51:23,301 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 13:51:23,324 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:51:23,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:51:23,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:51:23,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:51:23,325 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:51:23,325 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:51:23,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:51:23,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:51:23,326 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:51:23,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:51:23,327 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:51:23,327 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:51:23,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:51:23,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:51:23,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:51:23,328 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:51:23,328 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:51:23,328 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:51:23,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:51:23,329 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:51:23,329 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 13:51:23,329 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 13:51:23,329 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:51:23,329 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:51:23,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:51:23,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:51:23,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:51:23,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:51:23,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:51:23,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:51:23,331 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 13:51:23,331 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 13:51:23,331 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:51:23,331 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:51:23,332 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:51:23,332 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 13:51:23,332 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:51:23,332 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_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d [2022-12-13 13:51:23,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:51:23,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:51:23,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:51:23,560 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:51:23,561 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:51:23,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-12-13 13:51:26,191 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:51:26,335 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:51:26,335 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-12-13 13:51:26,342 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/data/31d253193/8e2b3cfcac8a4cd789b905067efafcbd/FLAG3a1869729 [2022-12-13 13:51:26,353 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/data/31d253193/8e2b3cfcac8a4cd789b905067efafcbd [2022-12-13 13:51:26,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:51:26,357 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:51:26,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:51:26,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:51:26,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:51:26,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:51:26" (1/1) ... [2022-12-13 13:51:26,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2acca2aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:26, skipping insertion in model container [2022-12-13 13:51:26,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:51:26" (1/1) ... [2022-12-13 13:51:26,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:51:26,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:51:26,547 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_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-12-13 13:51:26,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:51:26,570 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 13:51:26,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:51:26,592 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_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-12-13 13:51:26,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:51:26,598 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:51:26,617 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_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-12-13 13:51:26,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:51:26,631 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:51:26,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:26 WrapperNode [2022-12-13 13:51:26,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:51:26,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:51:26,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:51:26,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:51:26,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:26" (1/1) ... [2022-12-13 13:51:26,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:26" (1/1) ... [2022-12-13 13:51:26,667 INFO L138 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 278 [2022-12-13 13:51:26,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:51:26,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:51:26,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:51:26,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:51:26,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:26" (1/1) ... [2022-12-13 13:51:26,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:26" (1/1) ... [2022-12-13 13:51:26,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:26" (1/1) ... [2022-12-13 13:51:26,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:26" (1/1) ... [2022-12-13 13:51:26,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:26" (1/1) ... [2022-12-13 13:51:26,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:26" (1/1) ... [2022-12-13 13:51:26,690 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:26" (1/1) ... [2022-12-13 13:51:26,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:26" (1/1) ... [2022-12-13 13:51:26,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:51:26,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:51:26,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:51:26,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:51:26,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:26" (1/1) ... [2022-12-13 13:51:26,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:51:26,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:51:26,720 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:51:26,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:51:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:51:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 13:51:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:51:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 13:51:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 13:51:26,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 13:51:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 13:51:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 13:51:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 13:51:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 13:51:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 13:51:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:51:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:51:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:51:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 13:51:26,760 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 13:51:26,854 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:51:26,856 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:51:27,320 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:51:27,328 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:51:27,328 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 13:51:27,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:51:27 BoogieIcfgContainer [2022-12-13 13:51:27,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:51:27,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:51:27,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:51:27,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:51:27,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:51:26" (1/3) ... [2022-12-13 13:51:27,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cec470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:51:27, skipping insertion in model container [2022-12-13 13:51:27,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:51:26" (2/3) ... [2022-12-13 13:51:27,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cec470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:51:27, skipping insertion in model container [2022-12-13 13:51:27,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:51:27" (3/3) ... [2022-12-13 13:51:27,336 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2022-12-13 13:51:27,351 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:51:27,351 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-12-13 13:51:27,351 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:51:27,450 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 13:51:27,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 364 places, 380 transitions, 784 flow [2022-12-13 13:51:27,644 INFO L130 PetriNetUnfolder]: 26/377 cut-off events. [2022-12-13 13:51:27,644 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 13:51:27,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 377 events. 26/377 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 993 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 269. Up to 2 conditions per place. [2022-12-13 13:51:27,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 364 places, 380 transitions, 784 flow [2022-12-13 13:51:27,656 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 356 places, 372 transitions, 762 flow [2022-12-13 13:51:27,659 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:51:27,667 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 356 places, 372 transitions, 762 flow [2022-12-13 13:51:27,669 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 356 places, 372 transitions, 762 flow [2022-12-13 13:51:27,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 356 places, 372 transitions, 762 flow [2022-12-13 13:51:27,733 INFO L130 PetriNetUnfolder]: 26/372 cut-off events. [2022-12-13 13:51:27,733 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 13:51:27,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 372 events. 26/372 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 992 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 269. Up to 2 conditions per place. [2022-12-13 13:51:27,744 INFO L119 LiptonReduction]: Number of co-enabled transitions 37914 [2022-12-13 13:51:58,274 INFO L134 LiptonReduction]: Checked pairs total: 33999 [2022-12-13 13:51:58,274 INFO L136 LiptonReduction]: Total number of compositions: 437 [2022-12-13 13:51:58,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:51:58,289 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;@3571419a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:51:58,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-12-13 13:51:58,290 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 13:51:58,290 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:51:58,290 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:51:58,291 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:51:58,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:51:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:51:58,297 INFO L85 PathProgramCache]: Analyzing trace with hash 49514, now seen corresponding path program 1 times [2022-12-13 13:51:58,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:51:58,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907776748] [2022-12-13 13:51:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:51:58,306 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 13:51:58,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:51:58,307 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:51:58,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:51:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:51:58,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 13:51:58,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:51:58,526 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 13:51:58,527 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 42 [2022-12-13 13:51:58,559 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 13:51:58,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:51:58,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:51:58,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907776748] [2022-12-13 13:51:58,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907776748] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:51:58,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:51:58,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:51:58,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497635953] [2022-12-13 13:51:58,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:51:58,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:51:58,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:51:58,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:51:58,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:51:58,735 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 817 [2022-12-13 13:51:58,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:58,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:51:58,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 817 [2022-12-13 13:51:58,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:51:59,785 INFO L130 PetriNetUnfolder]: 3633/5128 cut-off events. [2022-12-13 13:51:59,785 INFO L131 PetriNetUnfolder]: For 178/178 co-relation queries the response was YES. [2022-12-13 13:51:59,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10447 conditions, 5128 events. 3633/5128 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 23329 event pairs, 2856 based on Foata normal form. 0/2051 useless extension candidates. Maximal degree in co-relation 4490. Up to 2566 conditions per place. [2022-12-13 13:51:59,813 INFO L137 encePairwiseOnDemand]: 813/817 looper letters, 84 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-12-13 13:51:59,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 86 transitions, 380 flow [2022-12-13 13:51:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:51:59,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:51:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1127 transitions. [2022-12-13 13:51:59,829 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.459812321501428 [2022-12-13 13:51:59,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1127 transitions. [2022-12-13 13:51:59,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1127 transitions. [2022-12-13 13:51:59,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:51:59,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1127 transitions. [2022-12-13 13:51:59,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 375.6666666666667) internal successors, (1127), 3 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:59,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:59,849 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:59,850 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 108 flow. Second operand 3 states and 1127 transitions. [2022-12-13 13:51:59,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 86 transitions, 380 flow [2022-12-13 13:51:59,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 86 transitions, 356 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 13:51:59,857 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2022-12-13 13:51:59,858 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2022-12-13 13:51:59,861 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2022-12-13 13:51:59,861 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2022-12-13 13:51:59,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:51:59,862 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:51:59,862 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:51:59,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:00,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:00,064 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:00,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:00,064 INFO L85 PathProgramCache]: Analyzing trace with hash 49720, now seen corresponding path program 1 times [2022-12-13 13:52:00,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:00,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21183566] [2022-12-13 13:52:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:00,065 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 13:52:00,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:00,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:00,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:00,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:52:00,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:00,144 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 13:52:00,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:52:00,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:00,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21183566] [2022-12-13 13:52:00,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21183566] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:00,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:00,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:52:00,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188580850] [2022-12-13 13:52:00,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:00,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:52:00,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:00,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:52:00,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:52:00,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 350 out of 817 [2022-12-13 13:52:00,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:00,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:00,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 350 of 817 [2022-12-13 13:52:00,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:00,615 INFO L130 PetriNetUnfolder]: 1817/2567 cut-off events. [2022-12-13 13:52:00,615 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-12-13 13:52:00,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5174 conditions, 2567 events. 1817/2567 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10395 event pairs, 1428 based on Foata normal form. 0/1029 useless extension candidates. Maximal degree in co-relation 5161. Up to 2566 conditions per place. [2022-12-13 13:52:00,624 INFO L137 encePairwiseOnDemand]: 812/817 looper letters, 44 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2022-12-13 13:52:00,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 200 flow [2022-12-13 13:52:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:52:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:52:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1099 transitions. [2022-12-13 13:52:00,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4483884128926969 [2022-12-13 13:52:00,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1099 transitions. [2022-12-13 13:52:00,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1099 transitions. [2022-12-13 13:52:00,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:00,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1099 transitions. [2022-12-13 13:52:00,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 366.3333333333333) internal successors, (1099), 3 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 13:52:00,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:00,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:00,633 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 1099 transitions. [2022-12-13 13:52:00,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 200 flow [2022-12-13 13:52:00,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:52:00,634 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 116 flow [2022-12-13 13:52:00,634 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2022-12-13 13:52:00,635 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2022-12-13 13:52:00,635 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 116 flow [2022-12-13 13:52:00,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:00,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:00,636 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:52:00,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:00,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:00,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:00,838 INFO L85 PathProgramCache]: Analyzing trace with hash 49513, now seen corresponding path program 1 times [2022-12-13 13:52:00,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:00,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612365118] [2022-12-13 13:52:00,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:00,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:52:00,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:00,840 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:00,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:00,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:52:00,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:00,963 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 13:52:00,964 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 13:52:00,977 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 13:52:00,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:52:00,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:00,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612365118] [2022-12-13 13:52:00,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612365118] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:00,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:00,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:52:00,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116237235] [2022-12-13 13:52:00,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:00,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:52:00,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:00,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:52:00,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:52:01,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 817 [2022-12-13 13:52:01,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:01,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:01,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 817 [2022-12-13 13:52:01,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:01,510 INFO L130 PetriNetUnfolder]: 1817/2565 cut-off events. [2022-12-13 13:52:01,510 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-12-13 13:52:01,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5176 conditions, 2565 events. 1817/2565 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10365 event pairs, 1428 based on Foata normal form. 2/1030 useless extension candidates. Maximal degree in co-relation 5162. Up to 2565 conditions per place. [2022-12-13 13:52:01,520 INFO L137 encePairwiseOnDemand]: 815/817 looper letters, 43 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-12-13 13:52:01,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 202 flow [2022-12-13 13:52:01,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:52:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:52:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1085 transitions. [2022-12-13 13:52:01,523 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44267645858833127 [2022-12-13 13:52:01,523 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1085 transitions. [2022-12-13 13:52:01,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1085 transitions. [2022-12-13 13:52:01,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:01,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1085 transitions. [2022-12-13 13:52:01,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:01,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:01,530 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:01,530 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 116 flow. Second operand 3 states and 1085 transitions. [2022-12-13 13:52:01,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 202 flow [2022-12-13 13:52:01,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 196 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 13:52:01,531 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 110 flow [2022-12-13 13:52:01,532 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2022-12-13 13:52:01,532 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2022-12-13 13:52:01,533 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 110 flow [2022-12-13 13:52:01,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:01,534 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:01,534 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:52:01,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:01,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:01,736 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1541482, now seen corresponding path program 1 times [2022-12-13 13:52:01,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:01,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976791257] [2022-12-13 13:52:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:01,741 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 13:52:01,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:01,746 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:01,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:01,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 13:52:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:01,902 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 13:52:01,903 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 42 [2022-12-13 13:52:01,942 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 13:52:01,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:52:02,049 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 13:52:02,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:02,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976791257] [2022-12-13 13:52:02,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976791257] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:52:02,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:52:02,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 13:52:02,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168512338] [2022-12-13 13:52:02,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:52:02,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:52:02,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:02,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:52:02,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:52:02,840 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 817 [2022-12-13 13:52:02,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 110 flow. Second operand has 6 states, 6 states have (on average 345.0) internal successors, (2070), 6 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:02,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:02,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 817 [2022-12-13 13:52:02,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:04,376 INFO L130 PetriNetUnfolder]: 5449/7689 cut-off events. [2022-12-13 13:52:04,377 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-12-13 13:52:04,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15492 conditions, 7689 events. 5449/7689 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 37693 event pairs, 4284 based on Foata normal form. 0/3080 useless extension candidates. Maximal degree in co-relation 15483. Up to 2565 conditions per place. [2022-12-13 13:52:04,401 INFO L137 encePairwiseOnDemand]: 814/817 looper letters, 122 selfloop transitions, 4 changer transitions 0/126 dead transitions. [2022-12-13 13:52:04,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 126 transitions, 554 flow [2022-12-13 13:52:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:52:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:52:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1848 transitions. [2022-12-13 13:52:04,405 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45238678090575274 [2022-12-13 13:52:04,405 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1848 transitions. [2022-12-13 13:52:04,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1848 transitions. [2022-12-13 13:52:04,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:04,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1848 transitions. [2022-12-13 13:52:04,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 369.6) internal successors, (1848), 5 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:04,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 817.0) internal successors, (4902), 6 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:04,414 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 817.0) internal successors, (4902), 6 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:04,414 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 110 flow. Second operand 5 states and 1848 transitions. [2022-12-13 13:52:04,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 126 transitions, 554 flow [2022-12-13 13:52:04,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 126 transitions, 553 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:52:04,415 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 135 flow [2022-12-13 13:52:04,416 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2022-12-13 13:52:04,416 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2022-12-13 13:52:04,416 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 135 flow [2022-12-13 13:52:04,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 345.0) internal successors, (2070), 6 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:04,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:04,417 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:52:04,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 13:52:04,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:04,619 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:04,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1541688, now seen corresponding path program 1 times [2022-12-13 13:52:04,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:04,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591271576] [2022-12-13 13:52:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:04,622 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 13:52:04,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:04,625 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:04,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:04,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:52:04,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:04,712 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 13:52:04,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:52:04,743 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 13:52:04,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:04,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591271576] [2022-12-13 13:52:04,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591271576] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:52:04,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:52:04,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 13:52:04,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511205136] [2022-12-13 13:52:04,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:52:04,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:52:04,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:04,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:52:04,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:52:04,848 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 817 [2022-12-13 13:52:04,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 135 flow. Second operand has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:04,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:04,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 817 [2022-12-13 13:52:04,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:05,318 INFO L130 PetriNetUnfolder]: 1817/2567 cut-off events. [2022-12-13 13:52:05,318 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-13 13:52:05,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5191 conditions, 2567 events. 1817/2567 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10317 event pairs, 1428 based on Foata normal form. 2/1033 useless extension candidates. Maximal degree in co-relation 5179. Up to 2564 conditions per place. [2022-12-13 13:52:05,326 INFO L137 encePairwiseOnDemand]: 811/817 looper letters, 41 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2022-12-13 13:52:05,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 227 flow [2022-12-13 13:52:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:52:05,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:52:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1792 transitions. [2022-12-13 13:52:05,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4386780905752754 [2022-12-13 13:52:05,329 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1792 transitions. [2022-12-13 13:52:05,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1792 transitions. [2022-12-13 13:52:05,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:05,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1792 transitions. [2022-12-13 13:52:05,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 358.4) internal successors, (1792), 5 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:05,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 817.0) internal successors, (4902), 6 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:05,337 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 817.0) internal successors, (4902), 6 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:05,337 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 135 flow. Second operand 5 states and 1792 transitions. [2022-12-13 13:52:05,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 227 flow [2022-12-13 13:52:05,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 46 transitions, 217 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 13:52:05,338 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 152 flow [2022-12-13 13:52:05,338 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2022-12-13 13:52:05,338 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2022-12-13 13:52:05,339 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 152 flow [2022-12-13 13:52:05,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:05,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:05,339 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2022-12-13 13:52:05,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 13:52:05,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:05,541 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:05,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:05,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1481573738, now seen corresponding path program 2 times [2022-12-13 13:52:05,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:05,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226095018] [2022-12-13 13:52:05,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:52:05,544 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 13:52:05,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:05,547 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:05,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:05,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:52:05,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:52:05,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 13:52:05,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:05,722 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:52:05,722 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 13:52:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:52:05,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:52:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:52:06,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:06,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226095018] [2022-12-13 13:52:06,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226095018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:52:06,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:52:06,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 13:52:06,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201046887] [2022-12-13 13:52:06,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:52:06,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:52:06,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:06,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:52:06,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:52:08,539 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 817 [2022-12-13 13:52:08,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 152 flow. Second operand has 10 states, 10 states have (on average 342.0) internal successors, (3420), 10 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:08,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:08,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 817 [2022-12-13 13:52:08,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:09,034 INFO L130 PetriNetUnfolder]: 1816/2565 cut-off events. [2022-12-13 13:52:09,034 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-12-13 13:52:09,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5192 conditions, 2565 events. 1816/2565 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10360 event pairs, 1428 based on Foata normal form. 2/1031 useless extension candidates. Maximal degree in co-relation 5177. Up to 2562 conditions per place. [2022-12-13 13:52:09,042 INFO L137 encePairwiseOnDemand]: 814/817 looper letters, 40 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2022-12-13 13:52:09,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 44 transitions, 223 flow [2022-12-13 13:52:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:52:09,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:52:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2092 transitions. [2022-12-13 13:52:09,045 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42676458588331295 [2022-12-13 13:52:09,045 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2092 transitions. [2022-12-13 13:52:09,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2092 transitions. [2022-12-13 13:52:09,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:09,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2092 transitions. [2022-12-13 13:52:09,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 348.6666666666667) internal successors, (2092), 6 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:09,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 817.0) internal successors, (5719), 7 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:09,052 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 817.0) internal successors, (5719), 7 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:09,052 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 152 flow. Second operand 6 states and 2092 transitions. [2022-12-13 13:52:09,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 44 transitions, 223 flow [2022-12-13 13:52:09,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 44 transitions, 207 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 13:52:09,053 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 127 flow [2022-12-13 13:52:09,053 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2022-12-13 13:52:09,054 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2022-12-13 13:52:09,054 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 127 flow [2022-12-13 13:52:09,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 342.0) internal successors, (3420), 10 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:09,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:09,055 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2022-12-13 13:52:09,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 13:52:09,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:09,256 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:09,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:09,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1481573944, now seen corresponding path program 2 times [2022-12-13 13:52:09,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:09,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445930762] [2022-12-13 13:52:09,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:52:09,257 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 13:52:09,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:09,258 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:09,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:09,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 13:52:09,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:52:09,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 13:52:09,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:09,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:52:09,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:52:09,402 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-12-13 13:52:09,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2022-12-13 13:52:09,422 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-13 13:52:09,422 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 90 treesize of output 89 [2022-12-13 13:52:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:09,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:52:09,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:09,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445930762] [2022-12-13 13:52:09,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445930762] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:09,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:09,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:52:09,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967877502] [2022-12-13 13:52:09,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:09,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:52:09,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:09,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:52:09,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:52:09,647 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 817 [2022-12-13 13:52:09,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:09,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:09,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 817 [2022-12-13 13:52:09,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:10,006 INFO L130 PetriNetUnfolder]: 1441/2064 cut-off events. [2022-12-13 13:52:10,006 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-12-13 13:52:10,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4179 conditions, 2064 events. 1441/2064 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8088 event pairs, 1128 based on Foata normal form. 0/879 useless extension candidates. Maximal degree in co-relation 4168. Up to 2064 conditions per place. [2022-12-13 13:52:10,011 INFO L137 encePairwiseOnDemand]: 814/817 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-12-13 13:52:10,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 42 transitions, 201 flow [2022-12-13 13:52:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:52:10,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:52:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1080 transitions. [2022-12-13 13:52:10,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44063647490820074 [2022-12-13 13:52:10,014 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1080 transitions. [2022-12-13 13:52:10,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1080 transitions. [2022-12-13 13:52:10,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:10,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1080 transitions. [2022-12-13 13:52:10,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.0) internal successors, (1080), 3 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:10,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:10,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:10,019 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 127 flow. Second operand 3 states and 1080 transitions. [2022-12-13 13:52:10,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 42 transitions, 201 flow [2022-12-13 13:52:10,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 194 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 13:52:10,021 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 112 flow [2022-12-13 13:52:10,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2022-12-13 13:52:10,021 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2022-12-13 13:52:10,022 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 112 flow [2022-12-13 13:52:10,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:10,022 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:10,022 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2022-12-13 13:52:10,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:10,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:10,223 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:10,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:10,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1481573946, now seen corresponding path program 1 times [2022-12-13 13:52:10,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:10,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071132267] [2022-12-13 13:52:10,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:10,224 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 13:52:10,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:10,225 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:10,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:10,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 13:52:10,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:10,349 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-12-13 13:52:10,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-12-13 13:52:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:10,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:52:10,444 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:10,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071132267] [2022-12-13 13:52:10,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071132267] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:10,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:10,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:52:10,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058733460] [2022-12-13 13:52:10,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:10,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:52:10,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:10,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:52:10,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:52:10,622 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 817 [2022-12-13 13:52:10,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:10,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:10,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 817 [2022-12-13 13:52:10,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:10,953 INFO L130 PetriNetUnfolder]: 1066/1563 cut-off events. [2022-12-13 13:52:10,953 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-12-13 13:52:10,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3172 conditions, 1563 events. 1066/1563 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5945 event pairs, 828 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 3161. Up to 1563 conditions per place. [2022-12-13 13:52:10,957 INFO L137 encePairwiseOnDemand]: 814/817 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-12-13 13:52:10,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 40 transitions, 182 flow [2022-12-13 13:52:10,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:52:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:52:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1081 transitions. [2022-12-13 13:52:10,959 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44104447164422683 [2022-12-13 13:52:10,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1081 transitions. [2022-12-13 13:52:10,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1081 transitions. [2022-12-13 13:52:10,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:10,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1081 transitions. [2022-12-13 13:52:10,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.3333333333333) internal successors, (1081), 3 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:10,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:10,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:10,963 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 112 flow. Second operand 3 states and 1081 transitions. [2022-12-13 13:52:10,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 40 transitions, 182 flow [2022-12-13 13:52:10,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 40 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:52:10,964 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 103 flow [2022-12-13 13:52:10,964 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2022-12-13 13:52:10,964 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2022-12-13 13:52:10,965 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 103 flow [2022-12-13 13:52:10,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:10,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:10,965 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2022-12-13 13:52:10,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 13:52:11,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:11,165 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:11,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:11,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2136546134, now seen corresponding path program 1 times [2022-12-13 13:52:11,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:11,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257368744] [2022-12-13 13:52:11,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:11,166 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 13:52:11,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:11,167 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:11,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:11,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:52:11,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:11,285 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 13:52:11,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-12-13 13:52:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:11,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:52:11,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:11,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257368744] [2022-12-13 13:52:11,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257368744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:11,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:11,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:52:11,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696740418] [2022-12-13 13:52:11,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:11,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:52:11,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:11,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:52:11,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:52:11,539 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 817 [2022-12-13 13:52:11,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:11,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:11,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 817 [2022-12-13 13:52:11,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:11,806 INFO L130 PetriNetUnfolder]: 1011/1478 cut-off events. [2022-12-13 13:52:11,806 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-12-13 13:52:11,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3003 conditions, 1478 events. 1011/1478 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5539 event pairs, 784 based on Foata normal form. 0/707 useless extension candidates. Maximal degree in co-relation 2991. Up to 1478 conditions per place. [2022-12-13 13:52:11,810 INFO L137 encePairwiseOnDemand]: 814/817 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-12-13 13:52:11,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 175 flow [2022-12-13 13:52:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:52:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:52:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1079 transitions. [2022-12-13 13:52:11,812 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44022847817217464 [2022-12-13 13:52:11,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1079 transitions. [2022-12-13 13:52:11,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1079 transitions. [2022-12-13 13:52:11,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:11,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1079 transitions. [2022-12-13 13:52:11,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.6666666666667) internal successors, (1079), 3 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:11,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:11,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:11,816 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 103 flow. Second operand 3 states and 1079 transitions. [2022-12-13 13:52:11,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 175 flow [2022-12-13 13:52:11,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:52:11,817 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 100 flow [2022-12-13 13:52:11,817 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2022-12-13 13:52:11,818 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2022-12-13 13:52:11,818 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 100 flow [2022-12-13 13:52:11,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:11,818 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:11,818 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2022-12-13 13:52:11,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:12,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:12,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:12,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:12,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2136546132, now seen corresponding path program 1 times [2022-12-13 13:52:12,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:12,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244109073] [2022-12-13 13:52:12,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:12,022 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 13:52:12,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:12,025 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:12,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:12,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:52:12,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:52:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:52:12,281 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-12-13 13:52:12,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2022-12-13 13:52:12,289 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 13:52:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:12,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:52:12,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:12,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244109073] [2022-12-13 13:52:12,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244109073] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:12,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:12,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:52:12,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406130117] [2022-12-13 13:52:12,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:12,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:52:12,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:52:12,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:52:12,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 817 [2022-12-13 13:52:12,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:12,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:12,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 817 [2022-12-13 13:52:12,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:12,773 INFO L130 PetriNetUnfolder]: 956/1393 cut-off events. [2022-12-13 13:52:12,773 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-12-13 13:52:12,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2834 conditions, 1393 events. 956/1393 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5140 event pairs, 740 based on Foata normal form. 0/685 useless extension candidates. Maximal degree in co-relation 2821. Up to 1393 conditions per place. [2022-12-13 13:52:12,776 INFO L137 encePairwiseOnDemand]: 814/817 looper letters, 35 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2022-12-13 13:52:12,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 168 flow [2022-12-13 13:52:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:52:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:52:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1074 transitions. [2022-12-13 13:52:12,779 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43818849449204406 [2022-12-13 13:52:12,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1074 transitions. [2022-12-13 13:52:12,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1074 transitions. [2022-12-13 13:52:12,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:12,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1074 transitions. [2022-12-13 13:52:12,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:12,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:12,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:12,783 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 100 flow. Second operand 3 states and 1074 transitions. [2022-12-13 13:52:12,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 168 flow [2022-12-13 13:52:12,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:52:12,783 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 97 flow [2022-12-13 13:52:12,784 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2022-12-13 13:52:12,784 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2022-12-13 13:52:12,784 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 97 flow [2022-12-13 13:52:12,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:12,784 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:12,784 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2022-12-13 13:52:12,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-13 13:52:12,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:12,986 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:12,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:12,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1808418480, now seen corresponding path program 1 times [2022-12-13 13:52:12,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:12,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419570943] [2022-12-13 13:52:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:12,990 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 13:52:12,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:12,993 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:12,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:13,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:52:13,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:13,197 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 13:52:13,197 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 13:52:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:13,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:52:13,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:13,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419570943] [2022-12-13 13:52:13,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419570943] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:13,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:13,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:52:13,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430702567] [2022-12-13 13:52:13,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:13,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:52:13,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:13,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:52:13,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:52:13,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 817 [2022-12-13 13:52:13,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 340.5) internal successors, (1362), 4 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:13,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:13,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 817 [2022-12-13 13:52:13,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:13,665 INFO L130 PetriNetUnfolder]: 537/792 cut-off events. [2022-12-13 13:52:13,665 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 13:52:13,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1623 conditions, 792 events. 537/792 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2514 event pairs, 387 based on Foata normal form. 0/452 useless extension candidates. Maximal degree in co-relation 1609. Up to 788 conditions per place. [2022-12-13 13:52:13,669 INFO L137 encePairwiseOnDemand]: 812/817 looper letters, 31 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2022-12-13 13:52:13,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 157 flow [2022-12-13 13:52:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:52:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:52:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1390 transitions. [2022-12-13 13:52:13,671 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42533659730722156 [2022-12-13 13:52:13,671 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1390 transitions. [2022-12-13 13:52:13,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1390 transitions. [2022-12-13 13:52:13,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:13,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1390 transitions. [2022-12-13 13:52:13,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 347.5) internal successors, (1390), 4 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:13,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 817.0) internal successors, (4085), 5 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:13,675 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 817.0) internal successors, (4085), 5 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:13,675 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 97 flow. Second operand 4 states and 1390 transitions. [2022-12-13 13:52:13,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 157 flow [2022-12-13 13:52:13,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 33 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:52:13,676 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 94 flow [2022-12-13 13:52:13,676 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2022-12-13 13:52:13,677 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2022-12-13 13:52:13,677 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 94 flow [2022-12-13 13:52:13,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 340.5) internal successors, (1362), 4 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:13,677 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:13,677 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2022-12-13 13:52:13,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 13:52:13,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:13,878 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:13,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:13,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1808418479, now seen corresponding path program 1 times [2022-12-13 13:52:13,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:13,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775139654] [2022-12-13 13:52:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:13,881 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 13:52:13,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:13,884 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:13,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:13,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 13:52:14,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:14,075 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 13:52:14,075 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 42 [2022-12-13 13:52:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:14,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:52:14,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:14,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775139654] [2022-12-13 13:52:14,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775139654] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:14,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:14,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:52:14,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493425581] [2022-12-13 13:52:14,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:14,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:52:14,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:14,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:52:14,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:52:14,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 817 [2022-12-13 13:52:14,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 342.2) internal successors, (1711), 5 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:14,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:14,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 817 [2022-12-13 13:52:14,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:14,888 INFO L130 PetriNetUnfolder]: 845/1250 cut-off events. [2022-12-13 13:52:14,888 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-12-13 13:52:14,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2551 conditions, 1250 events. 845/1250 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4824 event pairs, 387 based on Foata normal form. 0/716 useless extension candidates. Maximal degree in co-relation 2536. Up to 788 conditions per place. [2022-12-13 13:52:14,893 INFO L137 encePairwiseOnDemand]: 812/817 looper letters, 54 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2022-12-13 13:52:14,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 265 flow [2022-12-13 13:52:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:52:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:52:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1762 transitions. [2022-12-13 13:52:14,896 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43133414932680536 [2022-12-13 13:52:14,896 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1762 transitions. [2022-12-13 13:52:14,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1762 transitions. [2022-12-13 13:52:14,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:14,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1762 transitions. [2022-12-13 13:52:14,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 352.4) internal successors, (1762), 5 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:14,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 817.0) internal successors, (4902), 6 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:14,900 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 817.0) internal successors, (4902), 6 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:14,901 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 94 flow. Second operand 5 states and 1762 transitions. [2022-12-13 13:52:14,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 265 flow [2022-12-13 13:52:14,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 58 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:52:14,901 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 107 flow [2022-12-13 13:52:14,902 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=107, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2022-12-13 13:52:14,902 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2022-12-13 13:52:14,902 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 107 flow [2022-12-13 13:52:14,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 342.2) internal successors, (1711), 5 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:14,902 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:14,902 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-12-13 13:52:14,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 13:52:15,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:15,103 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:15,104 INFO L85 PathProgramCache]: Analyzing trace with hash -226396479, now seen corresponding path program 1 times [2022-12-13 13:52:15,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:15,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196672500] [2022-12-13 13:52:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:15,105 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 13:52:15,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:15,106 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:15,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:15,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:52:15,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:15,281 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 13:52:15,281 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 42 [2022-12-13 13:52:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:15,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:52:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:15,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:15,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196672500] [2022-12-13 13:52:15,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196672500] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:52:15,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:52:15,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 13:52:15,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915561248] [2022-12-13 13:52:15,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:52:15,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:52:15,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:15,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:52:15,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:52:17,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 817 [2022-12-13 13:52:17,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 107 flow. Second operand has 10 states, 10 states have (on average 341.4) internal successors, (3414), 10 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:17,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:17,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 817 [2022-12-13 13:52:17,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:18,110 INFO L130 PetriNetUnfolder]: 1461/2166 cut-off events. [2022-12-13 13:52:18,111 INFO L131 PetriNetUnfolder]: For 215/215 co-relation queries the response was YES. [2022-12-13 13:52:18,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4755 conditions, 2166 events. 1461/2166 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9683 event pairs, 387 based on Foata normal form. 0/1444 useless extension candidates. Maximal degree in co-relation 4739. Up to 788 conditions per place. [2022-12-13 13:52:18,116 INFO L137 encePairwiseOnDemand]: 812/817 looper letters, 102 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2022-12-13 13:52:18,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 108 transitions, 490 flow [2022-12-13 13:52:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:52:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 13:52:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2488 transitions. [2022-12-13 13:52:18,120 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4350410910998426 [2022-12-13 13:52:18,120 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2488 transitions. [2022-12-13 13:52:18,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2488 transitions. [2022-12-13 13:52:18,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:18,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2488 transitions. [2022-12-13 13:52:18,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 355.42857142857144) internal successors, (2488), 7 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:18,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 817.0) internal successors, (6536), 8 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:18,127 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 817.0) internal successors, (6536), 8 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:18,127 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 107 flow. Second operand 7 states and 2488 transitions. [2022-12-13 13:52:18,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 108 transitions, 490 flow [2022-12-13 13:52:18,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 108 transitions, 484 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:52:18,128 INFO L231 Difference]: Finished difference. Result has 54 places, 36 transitions, 131 flow [2022-12-13 13:52:18,128 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=36} [2022-12-13 13:52:18,129 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2022-12-13 13:52:18,129 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 36 transitions, 131 flow [2022-12-13 13:52:18,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 341.4) internal successors, (3414), 10 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:18,129 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:18,129 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-12-13 13:52:18,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:18,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:18,330 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:18,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:18,330 INFO L85 PathProgramCache]: Analyzing trace with hash -226431366, now seen corresponding path program 1 times [2022-12-13 13:52:18,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:18,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247401332] [2022-12-13 13:52:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:18,331 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 13:52:18,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:18,331 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:18,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:18,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:52:18,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:18,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:52:18,517 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-13 13:52:18,517 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 13:52:18,532 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 250 treesize of output 242 [2022-12-13 13:52:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:18,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:52:18,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:18,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247401332] [2022-12-13 13:52:18,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247401332] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:18,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:18,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:52:18,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549415804] [2022-12-13 13:52:18,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:18,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:52:18,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:18,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:52:18,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:52:18,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 817 [2022-12-13 13:52:18,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 36 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 350.3333333333333) internal successors, (1051), 3 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:18,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:18,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 817 [2022-12-13 13:52:18,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:19,020 INFO L130 PetriNetUnfolder]: 1365/2014 cut-off events. [2022-12-13 13:52:19,020 INFO L131 PetriNetUnfolder]: For 1195/1195 co-relation queries the response was YES. [2022-12-13 13:52:19,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4793 conditions, 2014 events. 1365/2014 cut-off events. For 1195/1195 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8048 event pairs, 1053 based on Foata normal form. 0/1426 useless extension candidates. Maximal degree in co-relation 4775. Up to 2014 conditions per place. [2022-12-13 13:52:19,025 INFO L137 encePairwiseOnDemand]: 814/817 looper letters, 33 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2022-12-13 13:52:19,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 34 transitions, 195 flow [2022-12-13 13:52:19,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:52:19,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:52:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1075 transitions. [2022-12-13 13:52:19,027 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43859649122807015 [2022-12-13 13:52:19,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1075 transitions. [2022-12-13 13:52:19,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1075 transitions. [2022-12-13 13:52:19,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:19,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1075 transitions. [2022-12-13 13:52:19,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.3333333333333) internal successors, (1075), 3 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:19,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:19,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:19,030 INFO L175 Difference]: Start difference. First operand has 54 places, 36 transitions, 131 flow. Second operand 3 states and 1075 transitions. [2022-12-13 13:52:19,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 34 transitions, 195 flow [2022-12-13 13:52:19,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 34 transitions, 186 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 13:52:19,031 INFO L231 Difference]: Finished difference. Result has 51 places, 34 transitions, 120 flow [2022-12-13 13:52:19,032 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=51, PETRI_TRANSITIONS=34} [2022-12-13 13:52:19,032 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2022-12-13 13:52:19,032 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 34 transitions, 120 flow [2022-12-13 13:52:19,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 350.3333333333333) internal successors, (1051), 3 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:19,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:19,032 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-12-13 13:52:19,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:19,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:19,233 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:19,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash -226431367, now seen corresponding path program 1 times [2022-12-13 13:52:19,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:19,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944555224] [2022-12-13 13:52:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:19,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:52:19,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:19,239 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:19,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:19,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 13:52:19,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:19,409 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 13:52:19,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2022-12-13 13:52:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:19,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:52:19,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:19,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944555224] [2022-12-13 13:52:19,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944555224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:19,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:19,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:52:19,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10842994] [2022-12-13 13:52:19,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:19,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:52:19,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:19,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:52:19,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:52:19,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 817 [2022-12-13 13:52:19,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 34 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 346.3333333333333) internal successors, (1039), 3 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:19,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:19,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 817 [2022-12-13 13:52:19,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:19,818 INFO L130 PetriNetUnfolder]: 1269/1862 cut-off events. [2022-12-13 13:52:19,818 INFO L131 PetriNetUnfolder]: For 787/787 co-relation queries the response was YES. [2022-12-13 13:52:19,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4303 conditions, 1862 events. 1269/1862 cut-off events. For 787/787 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7267 event pairs, 975 based on Foata normal form. 0/1358 useless extension candidates. Maximal degree in co-relation 4285. Up to 1862 conditions per place. [2022-12-13 13:52:19,823 INFO L137 encePairwiseOnDemand]: 814/817 looper letters, 31 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2022-12-13 13:52:19,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 32 transitions, 180 flow [2022-12-13 13:52:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:52:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:52:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1061 transitions. [2022-12-13 13:52:19,825 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4328845369237046 [2022-12-13 13:52:19,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1061 transitions. [2022-12-13 13:52:19,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1061 transitions. [2022-12-13 13:52:19,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:19,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1061 transitions. [2022-12-13 13:52:19,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:19,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:19,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 817.0) internal successors, (3268), 4 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:19,828 INFO L175 Difference]: Start difference. First operand has 51 places, 34 transitions, 120 flow. Second operand 3 states and 1061 transitions. [2022-12-13 13:52:19,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 32 transitions, 180 flow [2022-12-13 13:52:19,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 32 transitions, 179 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:52:19,829 INFO L231 Difference]: Finished difference. Result has 50 places, 32 transitions, 117 flow [2022-12-13 13:52:19,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=50, PETRI_TRANSITIONS=32} [2022-12-13 13:52:19,829 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2022-12-13 13:52:19,829 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 32 transitions, 117 flow [2022-12-13 13:52:19,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 346.3333333333333) internal successors, (1039), 3 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:19,830 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:19,830 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:52:19,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-12-13 13:52:20,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:20,031 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:20,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:20,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1570561725, now seen corresponding path program 1 times [2022-12-13 13:52:20,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:20,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828215241] [2022-12-13 13:52:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:20,032 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 13:52:20,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:20,034 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:20,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:20,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 13:52:20,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:20,222 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 13:52:20,222 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 42 [2022-12-13 13:52:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:20,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:52:20,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:20,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828215241] [2022-12-13 13:52:20,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828215241] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:20,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:20,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:52:20,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211329330] [2022-12-13 13:52:20,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:20,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:52:20,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:20,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:52:20,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:52:20,500 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 817 [2022-12-13 13:52:20,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 32 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 342.6) internal successors, (1713), 5 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:20,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:20,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 817 [2022-12-13 13:52:20,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:21,041 INFO L130 PetriNetUnfolder]: 1909/2806 cut-off events. [2022-12-13 13:52:21,041 INFO L131 PetriNetUnfolder]: For 1199/1199 co-relation queries the response was YES. [2022-12-13 13:52:21,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6452 conditions, 2806 events. 1909/2806 cut-off events. For 1199/1199 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12535 event pairs, 975 based on Foata normal form. 0/2042 useless extension candidates. Maximal degree in co-relation 6433. Up to 1858 conditions per place. [2022-12-13 13:52:21,049 INFO L137 encePairwiseOnDemand]: 812/817 looper letters, 50 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2022-12-13 13:52:21,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 297 flow [2022-12-13 13:52:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:52:21,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:52:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1752 transitions. [2022-12-13 13:52:21,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42888616891064874 [2022-12-13 13:52:21,052 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1752 transitions. [2022-12-13 13:52:21,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1752 transitions. [2022-12-13 13:52:21,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:21,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1752 transitions. [2022-12-13 13:52:21,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 350.4) internal successors, (1752), 5 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:21,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 817.0) internal successors, (4902), 6 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:21,056 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 817.0) internal successors, (4902), 6 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:21,056 INFO L175 Difference]: Start difference. First operand has 50 places, 32 transitions, 117 flow. Second operand 5 states and 1752 transitions. [2022-12-13 13:52:21,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 297 flow [2022-12-13 13:52:21,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:52:21,057 INFO L231 Difference]: Finished difference. Result has 54 places, 33 transitions, 132 flow [2022-12-13 13:52:21,057 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=54, PETRI_TRANSITIONS=33} [2022-12-13 13:52:21,058 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2022-12-13 13:52:21,058 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 33 transitions, 132 flow [2022-12-13 13:52:21,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 342.6) internal successors, (1713), 5 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:21,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:21,058 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2022-12-13 13:52:21,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-13 13:52:21,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:21,259 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:21,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1476364481, now seen corresponding path program 2 times [2022-12-13 13:52:21,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:21,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311694959] [2022-12-13 13:52:21,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:52:21,262 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 13:52:21,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:21,265 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:21,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:21,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:52:21,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:52:21,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 13:52:21,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:21,491 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 13:52:21,492 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 42 [2022-12-13 13:52:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:21,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:52:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:21,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:21,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311694959] [2022-12-13 13:52:21,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311694959] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:52:21,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:52:21,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2022-12-13 13:52:21,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238248023] [2022-12-13 13:52:21,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:52:21,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:52:21,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:21,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:52:21,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:52:24,485 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 817 [2022-12-13 13:52:24,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 132 flow. Second operand has 12 states, 12 states have (on average 341.5) internal successors, (4098), 12 states have internal predecessors, (4098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:24,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:24,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 817 [2022-12-13 13:52:24,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:25,719 INFO L130 PetriNetUnfolder]: 1701/2536 cut-off events. [2022-12-13 13:52:25,719 INFO L131 PetriNetUnfolder]: For 855/855 co-relation queries the response was YES. [2022-12-13 13:52:25,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6208 conditions, 2536 events. 1701/2536 cut-off events. For 855/855 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12142 event pairs, 63 based on Foata normal form. 124/2194 useless extension candidates. Maximal degree in co-relation 6187. Up to 596 conditions per place. [2022-12-13 13:52:25,727 INFO L137 encePairwiseOnDemand]: 812/817 looper letters, 102 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2022-12-13 13:52:25,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 108 transitions, 545 flow [2022-12-13 13:52:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:52:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 13:52:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2823 transitions. [2022-12-13 13:52:25,731 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4319155446756426 [2022-12-13 13:52:25,731 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2823 transitions. [2022-12-13 13:52:25,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2823 transitions. [2022-12-13 13:52:25,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:25,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2823 transitions. [2022-12-13 13:52:25,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 352.875) internal successors, (2823), 8 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:25,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 817.0) internal successors, (7353), 9 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:25,737 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 817.0) internal successors, (7353), 9 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:25,737 INFO L175 Difference]: Start difference. First operand has 54 places, 33 transitions, 132 flow. Second operand 8 states and 2823 transitions. [2022-12-13 13:52:25,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 108 transitions, 545 flow [2022-12-13 13:52:25,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 108 transitions, 522 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 13:52:25,740 INFO L231 Difference]: Finished difference. Result has 53 places, 31 transitions, 115 flow [2022-12-13 13:52:25,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=115, PETRI_PLACES=53, PETRI_TRANSITIONS=31} [2022-12-13 13:52:25,741 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2022-12-13 13:52:25,741 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 31 transitions, 115 flow [2022-12-13 13:52:25,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 341.5) internal successors, (4098), 12 states have internal predecessors, (4098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:25,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:25,741 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:52:25,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:25,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:25,942 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:25,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:25,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1442776139, now seen corresponding path program 1 times [2022-12-13 13:52:25,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:25,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298200657] [2022-12-13 13:52:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:25,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:52:25,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:25,948 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:25,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:26,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:52:26,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:26,238 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 13:52:26,239 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 42 [2022-12-13 13:52:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:26,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:52:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:26,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:26,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298200657] [2022-12-13 13:52:26,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298200657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:52:26,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:52:26,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 13:52:26,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269232705] [2022-12-13 13:52:26,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:52:26,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:52:26,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:26,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:52:26,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:52:28,803 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 817 [2022-12-13 13:52:28,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 31 transitions, 115 flow. Second operand has 10 states, 10 states have (on average 341.8) internal successors, (3418), 10 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:28,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:28,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 817 [2022-12-13 13:52:28,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:29,907 INFO L130 PetriNetUnfolder]: 2845/4248 cut-off events. [2022-12-13 13:52:29,907 INFO L131 PetriNetUnfolder]: For 1376/1376 co-relation queries the response was YES. [2022-12-13 13:52:29,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10066 conditions, 4248 events. 2845/4248 cut-off events. For 1376/1376 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 21342 event pairs, 895 based on Foata normal form. 0/3542 useless extension candidates. Maximal degree in co-relation 10048. Up to 1676 conditions per place. [2022-12-13 13:52:29,919 INFO L137 encePairwiseOnDemand]: 812/817 looper letters, 84 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2022-12-13 13:52:29,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 90 transitions, 471 flow [2022-12-13 13:52:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:52:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 13:52:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2462 transitions. [2022-12-13 13:52:29,923 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4304948417555517 [2022-12-13 13:52:29,923 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2462 transitions. [2022-12-13 13:52:29,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2462 transitions. [2022-12-13 13:52:29,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:29,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2462 transitions. [2022-12-13 13:52:29,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 351.7142857142857) internal successors, (2462), 7 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:29,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 817.0) internal successors, (6536), 8 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:29,929 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 817.0) internal successors, (6536), 8 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:29,929 INFO L175 Difference]: Start difference. First operand has 53 places, 31 transitions, 115 flow. Second operand 7 states and 2462 transitions. [2022-12-13 13:52:29,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 90 transitions, 471 flow [2022-12-13 13:52:29,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 90 transitions, 439 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 13:52:29,930 INFO L231 Difference]: Finished difference. Result has 55 places, 33 transitions, 134 flow [2022-12-13 13:52:29,930 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=134, PETRI_PLACES=55, PETRI_TRANSITIONS=33} [2022-12-13 13:52:29,931 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2022-12-13 13:52:29,931 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 33 transitions, 134 flow [2022-12-13 13:52:29,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 341.8) internal successors, (3418), 10 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:29,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:29,931 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:52:29,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-12-13 13:52:30,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:30,132 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:30,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:30,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1777824892, now seen corresponding path program 1 times [2022-12-13 13:52:30,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:30,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140424378] [2022-12-13 13:52:30,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:30,135 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 13:52:30,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:30,138 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:30,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:30,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 13:52:30,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:30,513 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 13:52:30,514 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 42 [2022-12-13 13:52:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:30,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:52:30,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:30,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140424378] [2022-12-13 13:52:30,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140424378] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:30,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:30,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:52:30,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6445891] [2022-12-13 13:52:30,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:30,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:52:30,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:30,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:52:30,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:52:30,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 817 [2022-12-13 13:52:30,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 33 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 343.0) internal successors, (1715), 5 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:30,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:30,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 817 [2022-12-13 13:52:30,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:31,707 INFO L130 PetriNetUnfolder]: 4089/6108 cut-off events. [2022-12-13 13:52:31,707 INFO L131 PetriNetUnfolder]: For 4472/4472 co-relation queries the response was YES. [2022-12-13 13:52:31,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15520 conditions, 6108 events. 4089/6108 cut-off events. For 4472/4472 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 31790 event pairs, 2431 based on Foata normal form. 0/5232 useless extension candidates. Maximal degree in co-relation 15500. Up to 4244 conditions per place. [2022-12-13 13:52:31,725 INFO L137 encePairwiseOnDemand]: 812/817 looper letters, 50 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2022-12-13 13:52:31,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 54 transitions, 324 flow [2022-12-13 13:52:31,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:52:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:52:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1748 transitions. [2022-12-13 13:52:31,728 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2022-12-13 13:52:31,728 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1748 transitions. [2022-12-13 13:52:31,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1748 transitions. [2022-12-13 13:52:31,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:31,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1748 transitions. [2022-12-13 13:52:31,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 349.6) internal successors, (1748), 5 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:31,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 817.0) internal successors, (4902), 6 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:31,732 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 817.0) internal successors, (4902), 6 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:31,732 INFO L175 Difference]: Start difference. First operand has 55 places, 33 transitions, 134 flow. Second operand 5 states and 1748 transitions. [2022-12-13 13:52:31,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 54 transitions, 324 flow [2022-12-13 13:52:31,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 309 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 13:52:31,735 INFO L231 Difference]: Finished difference. Result has 57 places, 34 transitions, 141 flow [2022-12-13 13:52:31,735 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=57, PETRI_TRANSITIONS=34} [2022-12-13 13:52:31,736 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2022-12-13 13:52:31,736 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 34 transitions, 141 flow [2022-12-13 13:52:31,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 343.0) internal successors, (1715), 5 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:31,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:31,736 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:52:31,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 13:52:31,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:31,937 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:31,938 INFO L85 PathProgramCache]: Analyzing trace with hash -722000395, now seen corresponding path program 1 times [2022-12-13 13:52:31,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:31,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737572355] [2022-12-13 13:52:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:31,940 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 13:52:31,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:31,942 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:31,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:32,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:52:32,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:32,202 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 13:52:32,202 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 42 [2022-12-13 13:52:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:32,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:52:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:32,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:32,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737572355] [2022-12-13 13:52:32,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737572355] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:52:32,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:52:32,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 13:52:32,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907294644] [2022-12-13 13:52:32,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:52:32,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:52:32,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:32,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:52:32,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:52:34,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 817 [2022-12-13 13:52:34,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 34 transitions, 141 flow. Second operand has 10 states, 10 states have (on average 342.2) internal successors, (3422), 10 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:34,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:34,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 817 [2022-12-13 13:52:34,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:36,237 INFO L130 PetriNetUnfolder]: 6577/9828 cut-off events. [2022-12-13 13:52:36,238 INFO L131 PetriNetUnfolder]: For 6879/6879 co-relation queries the response was YES. [2022-12-13 13:52:36,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26052 conditions, 9828 events. 6577/9828 cut-off events. For 6879/6879 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 55811 event pairs, 2431 based on Foata normal form. 0/9536 useless extension candidates. Maximal degree in co-relation 26031. Up to 4244 conditions per place. [2022-12-13 13:52:36,267 INFO L137 encePairwiseOnDemand]: 812/817 looper letters, 90 selfloop transitions, 6 changer transitions 0/96 dead transitions. [2022-12-13 13:52:36,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 563 flow [2022-12-13 13:52:36,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:52:36,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 13:52:36,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2456 transitions. [2022-12-13 13:52:36,271 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4294457072914845 [2022-12-13 13:52:36,271 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2456 transitions. [2022-12-13 13:52:36,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2456 transitions. [2022-12-13 13:52:36,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:36,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2456 transitions. [2022-12-13 13:52:36,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 350.85714285714283) internal successors, (2456), 7 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:36,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 817.0) internal successors, (6536), 8 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:36,276 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 817.0) internal successors, (6536), 8 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:36,276 INFO L175 Difference]: Start difference. First operand has 57 places, 34 transitions, 141 flow. Second operand 7 states and 2456 transitions. [2022-12-13 13:52:36,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 563 flow [2022-12-13 13:52:36,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 96 transitions, 557 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:52:36,282 INFO L231 Difference]: Finished difference. Result has 62 places, 36 transitions, 165 flow [2022-12-13 13:52:36,283 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=62, PETRI_TRANSITIONS=36} [2022-12-13 13:52:36,283 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2022-12-13 13:52:36,283 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 36 transitions, 165 flow [2022-12-13 13:52:36,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 342.2) internal successors, (3422), 10 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:36,283 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:36,283 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:52:36,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 13:52:36,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:36,485 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:36,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash -766473589, now seen corresponding path program 2 times [2022-12-13 13:52:36,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:36,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706658479] [2022-12-13 13:52:36,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:52:36,487 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 13:52:36,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:36,490 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:36,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:36,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:52:36,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:52:36,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 13:52:36,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:36,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:52:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:36,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:36,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706658479] [2022-12-13 13:52:36,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706658479] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:52:36,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:52:36,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 13:52:36,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783138015] [2022-12-13 13:52:36,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:52:36,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:52:36,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:36,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:52:36,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:52:36,816 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 350 out of 817 [2022-12-13 13:52:36,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 36 transitions, 165 flow. Second operand has 10 states, 10 states have (on average 351.6) internal successors, (3516), 10 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:36,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:36,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 350 of 817 [2022-12-13 13:52:36,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:38,744 INFO L130 PetriNetUnfolder]: 5675/8648 cut-off events. [2022-12-13 13:52:38,744 INFO L131 PetriNetUnfolder]: For 8754/8754 co-relation queries the response was YES. [2022-12-13 13:52:38,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24153 conditions, 8648 events. 5675/8648 cut-off events. For 8754/8754 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 51380 event pairs, 337 based on Foata normal form. 556/9204 useless extension candidates. Maximal degree in co-relation 24130. Up to 1996 conditions per place. [2022-12-13 13:52:38,770 INFO L137 encePairwiseOnDemand]: 814/817 looper letters, 113 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2022-12-13 13:52:38,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 117 transitions, 713 flow [2022-12-13 13:52:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:52:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:52:38,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2192 transitions. [2022-12-13 13:52:38,773 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44716442268461853 [2022-12-13 13:52:38,773 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2192 transitions. [2022-12-13 13:52:38,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2192 transitions. [2022-12-13 13:52:38,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:38,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2192 transitions. [2022-12-13 13:52:38,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 365.3333333333333) internal successors, (2192), 6 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:38,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 817.0) internal successors, (5719), 7 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:38,778 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 817.0) internal successors, (5719), 7 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:38,779 INFO L175 Difference]: Start difference. First operand has 62 places, 36 transitions, 165 flow. Second operand 6 states and 2192 transitions. [2022-12-13 13:52:38,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 117 transitions, 713 flow [2022-12-13 13:52:38,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 117 transitions, 671 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-12-13 13:52:38,809 INFO L231 Difference]: Finished difference. Result has 59 places, 34 transitions, 141 flow [2022-12-13 13:52:38,809 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=59, PETRI_TRANSITIONS=34} [2022-12-13 13:52:38,810 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2022-12-13 13:52:38,810 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 34 transitions, 141 flow [2022-12-13 13:52:38,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 351.6) internal successors, (3516), 10 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:38,810 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:38,810 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:52:38,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-13 13:52:39,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:39,011 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:39,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:39,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1942411989, now seen corresponding path program 2 times [2022-12-13 13:52:39,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:39,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106739968] [2022-12-13 13:52:39,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:52:39,014 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 13:52:39,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:39,017 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:39,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:39,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:52:39,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:52:39,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 13:52:39,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:39,282 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 13:52:39,282 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 42 [2022-12-13 13:52:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:39,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:52:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:39,741 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:39,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106739968] [2022-12-13 13:52:39,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106739968] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:52:39,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:52:39,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2022-12-13 13:52:39,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32166317] [2022-12-13 13:52:39,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:52:39,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:52:39,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:39,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:52:39,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:52:42,130 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 817 [2022-12-13 13:52:42,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 34 transitions, 141 flow. Second operand has 12 states, 12 states have (on average 342.1666666666667) internal successors, (4106), 12 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:42,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:42,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 817 [2022-12-13 13:52:42,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:44,075 INFO L130 PetriNetUnfolder]: 4872/7579 cut-off events. [2022-12-13 13:52:44,076 INFO L131 PetriNetUnfolder]: For 4287/4287 co-relation queries the response was YES. [2022-12-13 13:52:44,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19628 conditions, 7579 events. 4872/7579 cut-off events. For 4287/4287 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 44233 event pairs, 576 based on Foata normal form. 532/8111 useless extension candidates. Maximal degree in co-relation 19609. Up to 1638 conditions per place. [2022-12-13 13:52:44,098 INFO L137 encePairwiseOnDemand]: 812/817 looper letters, 95 selfloop transitions, 6 changer transitions 0/101 dead transitions. [2022-12-13 13:52:44,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 101 transitions, 562 flow [2022-12-13 13:52:44,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:52:44,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 13:52:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2801 transitions. [2022-12-13 13:52:44,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42854957160342716 [2022-12-13 13:52:44,102 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2801 transitions. [2022-12-13 13:52:44,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2801 transitions. [2022-12-13 13:52:44,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:44,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2801 transitions. [2022-12-13 13:52:44,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 350.125) internal successors, (2801), 8 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:44,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 817.0) internal successors, (7353), 9 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:44,108 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 817.0) internal successors, (7353), 9 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:44,108 INFO L175 Difference]: Start difference. First operand has 59 places, 34 transitions, 141 flow. Second operand 8 states and 2801 transitions. [2022-12-13 13:52:44,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 101 transitions, 562 flow [2022-12-13 13:52:44,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 101 transitions, 518 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 13:52:44,135 INFO L231 Difference]: Finished difference. Result has 57 places, 32 transitions, 123 flow [2022-12-13 13:52:44,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=123, PETRI_PLACES=57, PETRI_TRANSITIONS=32} [2022-12-13 13:52:44,135 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2022-12-13 13:52:44,135 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 32 transitions, 123 flow [2022-12-13 13:52:44,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 342.1666666666667) internal successors, (4106), 12 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:44,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:44,136 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:52:44,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:44,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:44,337 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:44,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:44,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1299107299, now seen corresponding path program 1 times [2022-12-13 13:52:44,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:44,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552947891] [2022-12-13 13:52:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:44,340 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 13:52:44,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:44,342 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:44,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:44,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 13:52:44,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:52:44,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:52:44,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:44,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552947891] [2022-12-13 13:52:44,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552947891] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:44,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:44,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:52:44,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336198515] [2022-12-13 13:52:44,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:44,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:52:44,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:44,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:52:44,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:52:44,729 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 817 [2022-12-13 13:52:44,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 32 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 342.25) internal successors, (1369), 4 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:44,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:44,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 817 [2022-12-13 13:52:44,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:46,031 INFO L130 PetriNetUnfolder]: 4872/7563 cut-off events. [2022-12-13 13:52:46,031 INFO L131 PetriNetUnfolder]: For 3005/3005 co-relation queries the response was YES. [2022-12-13 13:52:46,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18838 conditions, 7563 events. 4872/7563 cut-off events. For 3005/3005 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 43564 event pairs, 3710 based on Foata normal form. 16/7579 useless extension candidates. Maximal degree in co-relation 18821. Up to 5788 conditions per place. [2022-12-13 13:52:46,050 INFO L137 encePairwiseOnDemand]: 813/817 looper letters, 45 selfloop transitions, 2 changer transitions 21/68 dead transitions. [2022-12-13 13:52:46,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 380 flow [2022-12-13 13:52:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:52:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:52:46,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1402 transitions. [2022-12-13 13:52:46,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42900856793145653 [2022-12-13 13:52:46,052 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1402 transitions. [2022-12-13 13:52:46,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1402 transitions. [2022-12-13 13:52:46,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:46,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1402 transitions. [2022-12-13 13:52:46,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 350.5) internal successors, (1402), 4 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:46,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 817.0) internal successors, (4085), 5 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:46,055 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 817.0) internal successors, (4085), 5 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:46,055 INFO L175 Difference]: Start difference. First operand has 57 places, 32 transitions, 123 flow. Second operand 4 states and 1402 transitions. [2022-12-13 13:52:46,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 380 flow [2022-12-13 13:52:46,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 355 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 13:52:46,058 INFO L231 Difference]: Finished difference. Result has 56 places, 32 transitions, 122 flow [2022-12-13 13:52:46,059 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=32} [2022-12-13 13:52:46,059 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2022-12-13 13:52:46,059 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 32 transitions, 122 flow [2022-12-13 13:52:46,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 342.25) internal successors, (1369), 4 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:46,059 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:46,059 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:52:46,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-12-13 13:52:46,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:46,260 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:46,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:46,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1815099621, now seen corresponding path program 1 times [2022-12-13 13:52:46,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:46,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607434426] [2022-12-13 13:52:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:46,263 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 13:52:46,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:46,266 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:46,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:46,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 13:52:46,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 13:52:46,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:52:46,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:52:46,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607434426] [2022-12-13 13:52:46,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607434426] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:52:46,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:52:46,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:52:46,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230410328] [2022-12-13 13:52:46,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:52:46,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:52:46,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:52:46,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:52:46,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:52:46,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 817 [2022-12-13 13:52:46,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 32 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 342.5) internal successors, (1370), 4 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:46,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:52:46,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 817 [2022-12-13 13:52:46,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:52:47,800 INFO L130 PetriNetUnfolder]: 4115/6362 cut-off events. [2022-12-13 13:52:47,800 INFO L131 PetriNetUnfolder]: For 2962/2962 co-relation queries the response was YES. [2022-12-13 13:52:47,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16428 conditions, 6362 events. 4115/6362 cut-off events. For 2962/2962 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 35295 event pairs, 3151 based on Foata normal form. 12/6374 useless extension candidates. Maximal degree in co-relation 16410. Up to 4905 conditions per place. [2022-12-13 13:52:47,818 INFO L137 encePairwiseOnDemand]: 813/817 looper letters, 45 selfloop transitions, 2 changer transitions 19/66 dead transitions. [2022-12-13 13:52:47,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 372 flow [2022-12-13 13:52:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:52:47,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:52:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1400 transitions. [2022-12-13 13:52:47,820 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4283965728274174 [2022-12-13 13:52:47,820 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1400 transitions. [2022-12-13 13:52:47,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1400 transitions. [2022-12-13 13:52:47,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:52:47,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1400 transitions. [2022-12-13 13:52:47,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:47,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 817.0) internal successors, (4085), 5 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:47,824 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 817.0) internal successors, (4085), 5 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:47,824 INFO L175 Difference]: Start difference. First operand has 56 places, 32 transitions, 122 flow. Second operand 4 states and 1400 transitions. [2022-12-13 13:52:47,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 372 flow [2022-12-13 13:52:47,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 66 transitions, 352 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 13:52:47,827 INFO L231 Difference]: Finished difference. Result has 57 places, 32 transitions, 124 flow [2022-12-13 13:52:47,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=57, PETRI_TRANSITIONS=32} [2022-12-13 13:52:47,827 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2022-12-13 13:52:47,827 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 32 transitions, 124 flow [2022-12-13 13:52:47,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 342.5) internal successors, (1370), 4 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:52:47,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:52:47,828 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:52:47,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:48,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:48,029 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 13:52:48,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:52:48,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2091663789, now seen corresponding path program 1 times [2022-12-13 13:52:48,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:52:48,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499023354] [2022-12-13 13:52:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:52:48,032 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 13:52:48,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:52:48,035 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:48,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 13:52:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:52:48,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 13:52:48,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:52:48,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:52:48,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 602 treesize of output 228 [2022-12-13 13:52:56,977 WARN L233 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 62 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:53:04,602 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 71 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:53:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:53:05,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:53:06,989 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-13 13:53:06,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 427 treesize of output 165 [2022-12-13 13:54:18,855 WARN L233 SmtUtils]: Spent 1.18m on a formula simplification. DAG size of input: 208 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:54:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:54:18,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:54:18,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499023354] [2022-12-13 13:54:18,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499023354] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:54:18,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:54:18,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 13:54:18,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095621832] [2022-12-13 13:54:18,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:54:18,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 13:54:18,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:54:18,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 13:54:18,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:54:27,417 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 817 [2022-12-13 13:54:27,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 32 transitions, 124 flow. Second operand has 14 states, 14 states have (on average 310.92857142857144) internal successors, (4353), 14 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:54:27,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:54:27,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 817 [2022-12-13 13:54:27,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:55:08,784 WARN L233 SmtUtils]: Spent 40.50s on a formula simplification. DAG size of input: 100 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:55:29,836 WARN L233 SmtUtils]: Spent 20.20s on a formula simplification that was a NOOP. DAG size: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:56:12,285 WARN L233 SmtUtils]: Spent 40.72s on a formula simplification. DAG size of input: 128 DAG size of output: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:56:15,046 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 13:56:57,892 WARN L233 SmtUtils]: Spent 41.82s on a formula simplification. DAG size of input: 91 DAG size of output: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:57:18,688 WARN L233 SmtUtils]: Spent 20.50s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:57:21,169 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 13:58:03,049 WARN L233 SmtUtils]: Spent 41.73s on a formula simplification. DAG size of input: 145 DAG size of output: 131 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:58:23,710 WARN L233 SmtUtils]: Spent 20.30s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:59:13,190 WARN L233 SmtUtils]: Spent 48.24s on a formula simplification. DAG size of input: 173 DAG size of output: 164 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:59:33,871 WARN L233 SmtUtils]: Spent 20.24s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:59:54,366 WARN L233 SmtUtils]: Spent 20.32s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:00:35,754 WARN L233 SmtUtils]: Spent 41.04s on a formula simplification. DAG size of input: 150 DAG size of output: 136 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:01:23,797 WARN L233 SmtUtils]: Spent 47.82s on a formula simplification. DAG size of input: 116 DAG size of output: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:02:17,173 WARN L233 SmtUtils]: Spent 48.56s on a formula simplification. DAG size of input: 144 DAG size of output: 135 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:03:06,873 WARN L233 SmtUtils]: Spent 49.27s on a formula simplification. DAG size of input: 178 DAG size of output: 165 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:03:27,768 WARN L233 SmtUtils]: Spent 20.26s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:03:48,222 WARN L233 SmtUtils]: Spent 20.32s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:04:37,033 WARN L233 SmtUtils]: Spent 48.27s on a formula simplification. DAG size of input: 121 DAG size of output: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:05:26,776 WARN L233 SmtUtils]: Spent 48.93s on a formula simplification. DAG size of input: 149 DAG size of output: 136 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:06:07,880 WARN L233 SmtUtils]: Spent 40.60s on a formula simplification. DAG size of input: 92 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:06:13,097 INFO L130 PetriNetUnfolder]: 8562/13294 cut-off events. [2022-12-13 14:06:13,097 INFO L131 PetriNetUnfolder]: For 7531/7531 co-relation queries the response was YES. [2022-12-13 14:06:13,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36534 conditions, 13294 events. 8562/13294 cut-off events. For 7531/7531 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 86407 event pairs, 1601 based on Foata normal form. 24/13318 useless extension candidates. Maximal degree in co-relation 36515. Up to 3292 conditions per place. [2022-12-13 14:06:13,142 INFO L137 encePairwiseOnDemand]: 808/817 looper letters, 351 selfloop transitions, 95 changer transitions 81/527 dead transitions. [2022-12-13 14:06:13,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 527 transitions, 2798 flow [2022-12-13 14:06:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 14:06:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-13 14:06:13,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 12756 transitions. [2022-12-13 14:06:13,154 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39033047735618115 [2022-12-13 14:06:13,154 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 12756 transitions. [2022-12-13 14:06:13,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 12756 transitions. [2022-12-13 14:06:13,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:06:13,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 12756 transitions. [2022-12-13 14:06:13,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 318.9) internal successors, (12756), 40 states have internal predecessors, (12756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:13,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 817.0) internal successors, (33497), 41 states have internal predecessors, (33497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:13,182 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 817.0) internal successors, (33497), 41 states have internal predecessors, (33497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:13,182 INFO L175 Difference]: Start difference. First operand has 57 places, 32 transitions, 124 flow. Second operand 40 states and 12756 transitions. [2022-12-13 14:06:13,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 527 transitions, 2798 flow [2022-12-13 14:06:13,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 527 transitions, 2702 flow, removed 25 selfloop flow, removed 3 redundant places. [2022-12-13 14:06:13,190 INFO L231 Difference]: Finished difference. Result has 108 places, 142 transitions, 807 flow [2022-12-13 14:06:13,190 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=817, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=807, PETRI_PLACES=108, PETRI_TRANSITIONS=142} [2022-12-13 14:06:13,190 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 57 predicate places. [2022-12-13 14:06:13,190 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 142 transitions, 807 flow [2022-12-13 14:06:13,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 310.92857142857144) internal successors, (4353), 14 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:06:13,191 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:06:13,191 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:06:13,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 14:06:13,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:13,392 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-13 14:06:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:06:13,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1093300719, now seen corresponding path program 2 times [2022-12-13 14:06:13,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:06:13,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040424201] [2022-12-13 14:06:13,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:06:13,396 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 14:06:13,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:06:13,400 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:13,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c24d8e-18dc-4693-97ba-1b08e9e9e3d0/bin/uautomizer-uyxdKDjOR8/mathsat -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 14:06:13,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:06:13,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:06:13,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 14:06:13,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:06:13,712 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 18 treesize of output 16 [2022-12-13 14:06:14,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 399 treesize of output 339 [2022-12-13 14:06:14,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:06:14,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:06:14,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:06:14,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:06:14,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:06:14,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:06:14,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:06:14,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:06:14,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:06:14,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:06:14,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:06:14,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 516 treesize of output 176 [2022-12-13 14:06:22,648 WARN L233 SmtUtils]: Spent 7.80s on a formula simplification. DAG size of input: 39 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:06:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:06:22,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:06:24,251 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-13 14:06:24,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 458 treesize of output 196 [2022-12-13 14:06:24,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:06:24,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 13 [2022-12-13 14:06:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:06:25,757 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:06:25,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040424201] [2022-12-13 14:06:25,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040424201] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:06:25,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:06:25,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-12-13 14:06:25,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952747309] [2022-12-13 14:06:25,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:06:25,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 14:06:25,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:06:25,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 14:06:25,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=323, Unknown=1, NotChecked=0, Total=380