./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/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_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/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_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- 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 20:27:56,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:27:56,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:27:56,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:27:56,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:27:56,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:27:56,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:27:56,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:27:56,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:27:56,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:27:56,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:27:56,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:27:56,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:27:56,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:27:56,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:27:56,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:27:56,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:27:56,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:27:56,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:27:56,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:27:56,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:27:56,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:27:56,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:27:56,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:27:56,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:27:56,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:27:56,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:27:56,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:27:56,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:27:56,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:27:56,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:27:56,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:27:56,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:27:56,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:27:56,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:27:56,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:27:56,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:27:56,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:27:56,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:27:56,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:27:56,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:27:56,886 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 20:27:56,908 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:27:56,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:27:56,909 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:27:56,909 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:27:56,909 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:27:56,910 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:27:56,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:27:56,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:27:56,911 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:27:56,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:27:56,911 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:27:56,911 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:27:56,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:27:56,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:27:56,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:27:56,912 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 20:27:56,912 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 20:27:56,912 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 20:27:56,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:27:56,913 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 20:27:56,913 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:27:56,913 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:27:56,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:27:56,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:27:56,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:27:56,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:27:56,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:27:56,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:27:56,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:27:56,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:27:56,915 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:27:56,915 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:27:56,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:27:56,915 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:27:56,916 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_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-12-13 20:27:57,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:27:57,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:27:57,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:27:57,132 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:27:57,132 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:27:57,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-12-13 20:27:59,684 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:27:59,841 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:27:59,841 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-12-13 20:27:59,846 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/data/bdb8ff36e/e725b576d45349ac8bbfbf7da04d5cbd/FLAG959c495f6 [2022-12-13 20:28:00,244 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/data/bdb8ff36e/e725b576d45349ac8bbfbf7da04d5cbd [2022-12-13 20:28:00,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:28:00,247 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:28:00,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:28:00,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:28:00,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:28:00,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:28:00" (1/1) ... [2022-12-13 20:28:00,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f3b935b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:00, skipping insertion in model container [2022-12-13 20:28:00,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:28:00" (1/1) ... [2022-12-13 20:28:00,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:28:00,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:28:00,396 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_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-12-13 20:28:00,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:28:00,410 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 20:28:00,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f0d491e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:00, skipping insertion in model container [2022-12-13 20:28:00,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:28:00,411 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 20:28:00,412 INFO L158 Benchmark]: Toolchain (without parser) took 164.69ms. Allocated memory is still 155.2MB. Free memory was 121.6MB in the beginning and 111.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 20:28:00,412 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 155.2MB. Free memory was 97.9MB in the beginning and 97.8MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 20:28:00,413 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.23ms. Allocated memory is still 155.2MB. Free memory was 121.6MB in the beginning and 111.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 20:28:00,414 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 155.2MB. Free memory was 97.9MB in the beginning and 97.8MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 163.23ms. Allocated memory is still 155.2MB. Free memory was 121.6MB in the beginning and 111.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/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_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/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_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- 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 20:28:01,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:28:01,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:28:01,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:28:01,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:28:01,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:28:01,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:28:01,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:28:01,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:28:01,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:28:01,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:28:01,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:28:01,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:28:01,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:28:01,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:28:01,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:28:01,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:28:01,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:28:01,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:28:01,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:28:01,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:28:01,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:28:01,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:28:01,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:28:01,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:28:01,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:28:01,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:28:01,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:28:01,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:28:01,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:28:01,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:28:01,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:28:01,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:28:01,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:28:01,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:28:01,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:28:01,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:28:01,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:28:01,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:28:01,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:28:01,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:28:01,824 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 20:28:01,841 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:28:01,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:28:01,841 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:28:01,842 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:28:01,842 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:28:01,842 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:28:01,843 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:28:01,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:28:01,843 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:28:01,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:28:01,843 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:28:01,843 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:28:01,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:28:01,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:28:01,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:28:01,844 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 20:28:01,844 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 20:28:01,844 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 20:28:01,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:28:01,844 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 20:28:01,844 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 20:28:01,844 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 20:28:01,845 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:28:01,845 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:28:01,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:28:01,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:28:01,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:28:01,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:28:01,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:28:01,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:28:01,846 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 20:28:01,846 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 20:28:01,846 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:28:01,846 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:28:01,846 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:28:01,846 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 20:28:01,846 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:28:01,846 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_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-12-13 20:28:02,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:28:02,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:28:02,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:28:02,070 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:28:02,070 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:28:02,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-12-13 20:28:04,657 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:28:04,781 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:28:04,782 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-12-13 20:28:04,787 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/data/619a3792b/c23c8f64f76b462fb45b2af772416fe8/FLAGd774b659b [2022-12-13 20:28:04,798 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/data/619a3792b/c23c8f64f76b462fb45b2af772416fe8 [2022-12-13 20:28:04,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:28:04,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:28:04,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:28:04,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:28:04,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:28:04,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:28:04" (1/1) ... [2022-12-13 20:28:04,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@370fba61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:04, skipping insertion in model container [2022-12-13 20:28:04,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:28:04" (1/1) ... [2022-12-13 20:28:04,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:28:04,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:28:04,953 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_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-12-13 20:28:04,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:28:04,970 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 20:28:04,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:28:04,985 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_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-12-13 20:28:04,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:28:04,992 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:28:05,010 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_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-12-13 20:28:05,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:28:05,025 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:28:05,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:05 WrapperNode [2022-12-13 20:28:05,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:28:05,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:28:05,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:28:05,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:28:05,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:05" (1/1) ... [2022-12-13 20:28:05,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:05" (1/1) ... [2022-12-13 20:28:05,057 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 122 [2022-12-13 20:28:05,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:28:05,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:28:05,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:28:05,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:28:05,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:05" (1/1) ... [2022-12-13 20:28:05,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:05" (1/1) ... [2022-12-13 20:28:05,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:05" (1/1) ... [2022-12-13 20:28:05,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:05" (1/1) ... [2022-12-13 20:28:05,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:05" (1/1) ... [2022-12-13 20:28:05,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:05" (1/1) ... [2022-12-13 20:28:05,080 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:05" (1/1) ... [2022-12-13 20:28:05,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:05" (1/1) ... [2022-12-13 20:28:05,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:28:05,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:28:05,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:28:05,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:28:05,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:05" (1/1) ... [2022-12-13 20:28:05,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:28:05,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:28:05,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:28:05,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:28:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:28:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 20:28:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 20:28:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 20:28:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 20:28:05,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 20:28:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 20:28:05,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 20:28:05,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 20:28:05,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:28:05,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:28:05,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:28:05,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 20:28:05,147 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 20:28:05,237 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:28:05,239 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:28:05,711 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:28:05,717 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:28:05,717 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 20:28:05,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:28:05 BoogieIcfgContainer [2022-12-13 20:28:05,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:28:05,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:28:05,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:28:05,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:28:05,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:28:04" (1/3) ... [2022-12-13 20:28:05,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437cd06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:28:05, skipping insertion in model container [2022-12-13 20:28:05,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:05" (2/3) ... [2022-12-13 20:28:05,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437cd06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:28:05, skipping insertion in model container [2022-12-13 20:28:05,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:28:05" (3/3) ... [2022-12-13 20:28:05,725 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-12-13 20:28:05,738 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:28:05,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-12-13 20:28:05,739 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 20:28:05,809 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 20:28:05,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 252 transitions, 520 flow [2022-12-13 20:28:05,896 INFO L130 PetriNetUnfolder]: 21/250 cut-off events. [2022-12-13 20:28:05,896 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 20:28:05,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 250 events. 21/250 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 399 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 164. Up to 3 conditions per place. [2022-12-13 20:28:05,900 INFO L82 GeneralOperation]: Start removeDead. Operand has 238 places, 252 transitions, 520 flow [2022-12-13 20:28:05,905 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 245 transitions, 502 flow [2022-12-13 20:28:05,908 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 20:28:05,915 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 245 transitions, 502 flow [2022-12-13 20:28:05,917 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 245 transitions, 502 flow [2022-12-13 20:28:05,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 245 transitions, 502 flow [2022-12-13 20:28:05,956 INFO L130 PetriNetUnfolder]: 21/245 cut-off events. [2022-12-13 20:28:05,956 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 20:28:05,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 245 events. 21/245 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 404 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 164. Up to 3 conditions per place. [2022-12-13 20:28:05,959 INFO L119 LiptonReduction]: Number of co-enabled transitions 4636 [2022-12-13 20:28:28,037 INFO L134 LiptonReduction]: Checked pairs total: 7597 [2022-12-13 20:28:28,037 INFO L136 LiptonReduction]: Total number of compositions: 280 [2022-12-13 20:28:28,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:28:28,052 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;@7497d2a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:28:28,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2022-12-13 20:28:28,054 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 20:28:28,054 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:28:28,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:28:28,055 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:28:28,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:28:28,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:28,058 INFO L85 PathProgramCache]: Analyzing trace with hash 31145, now seen corresponding path program 1 times [2022-12-13 20:28:28,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:28:28,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359936475] [2022-12-13 20:28:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:28,067 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 20:28:28,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:28:28,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:28,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:28,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 20:28:28,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:28:28,224 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 20:28:28,224 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 20:28:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:28:28,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:28:28,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:28:28,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359936475] [2022-12-13 20:28:28,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359936475] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:28,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:28,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:28:28,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339755600] [2022-12-13 20:28:28,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:28,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:28:28,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:28:28,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:28:28,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:28:28,446 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 532 [2022-12-13 20:28:28,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:28,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:28:28,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 532 [2022-12-13 20:28:28,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:28:28,841 INFO L130 PetriNetUnfolder]: 840/1309 cut-off events. [2022-12-13 20:28:28,841 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-12-13 20:28:28,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2642 conditions, 1309 events. 840/1309 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 6074 event pairs, 630 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 2484. Up to 1293 conditions per place. [2022-12-13 20:28:28,851 INFO L137 encePairwiseOnDemand]: 524/532 looper letters, 45 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2022-12-13 20:28:28,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 198 flow [2022-12-13 20:28:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:28:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:28:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2022-12-13 20:28:28,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45802005012531327 [2022-12-13 20:28:28,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2022-12-13 20:28:28,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2022-12-13 20:28:28,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:28:28,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2022-12-13 20:28:28,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:28,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:28,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:28,895 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 120 flow. Second operand 3 states and 731 transitions. [2022-12-13 20:28:28,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 198 flow [2022-12-13 20:28:28,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 190 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 20:28:28,901 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 100 flow [2022-12-13 20:28:28,903 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2022-12-13 20:28:28,906 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2022-12-13 20:28:28,907 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 100 flow [2022-12-13 20:28:28,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:28,907 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:28:28,908 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:28:28,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:29,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:29,109 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:28:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:29,110 INFO L85 PathProgramCache]: Analyzing trace with hash 31146, now seen corresponding path program 1 times [2022-12-13 20:28:29,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:28:29,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533089887] [2022-12-13 20:28:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:29,111 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 20:28:29,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:28:29,112 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:29,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:29,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:28:29,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:28:29,239 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:28:29,240 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:28:29,261 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 20:28:29,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:28:29,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:28:29,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533089887] [2022-12-13 20:28:29,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533089887] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:29,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:29,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:28:29,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438790519] [2022-12-13 20:28:29,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:29,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:28:29,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:28:29,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:28:29,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:28:29,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 532 [2022-12-13 20:28:29,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:29,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:28:29,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 532 [2022-12-13 20:28:29,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:28:30,174 INFO L130 PetriNetUnfolder]: 1679/2615 cut-off events. [2022-12-13 20:28:30,174 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-13 20:28:30,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5230 conditions, 2615 events. 1679/2615 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 13604 event pairs, 1260 based on Foata normal form. 0/833 useless extension candidates. Maximal degree in co-relation 5224. Up to 1294 conditions per place. [2022-12-13 20:28:30,190 INFO L137 encePairwiseOnDemand]: 526/532 looper letters, 85 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2022-12-13 20:28:30,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 90 transitions, 368 flow [2022-12-13 20:28:30,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:28:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:28:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 769 transitions. [2022-12-13 20:28:30,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4818295739348371 [2022-12-13 20:28:30,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 769 transitions. [2022-12-13 20:28:30,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 769 transitions. [2022-12-13 20:28:30,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:28:30,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 769 transitions. [2022-12-13 20:28:30,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:30,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:30,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:30,207 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 100 flow. Second operand 3 states and 769 transitions. [2022-12-13 20:28:30,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 90 transitions, 368 flow [2022-12-13 20:28:30,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 90 transitions, 367 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:28:30,209 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 131 flow [2022-12-13 20:28:30,209 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2022-12-13 20:28:30,210 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2022-12-13 20:28:30,210 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 131 flow [2022-12-13 20:28:30,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:30,211 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:28:30,211 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 20:28:30,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:30,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:30,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:28:30,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:30,417 INFO L85 PathProgramCache]: Analyzing trace with hash 974072, now seen corresponding path program 1 times [2022-12-13 20:28:30,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:28:30,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854623943] [2022-12-13 20:28:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:30,417 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 20:28:30,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:28:30,418 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:30,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:30,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 20:28:30,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:28:30,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:28:30,536 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-13 20:28:30,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-12-13 20:28:30,586 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 20:28:30,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 20:28:30,616 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 20:28:30,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:28:30,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:28:30,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854623943] [2022-12-13 20:28:30,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854623943] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:30,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:30,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:28:30,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687832332] [2022-12-13 20:28:30,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:30,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:28:30,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:28:30,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:28:30,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:28:30,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 532 [2022-12-13 20:28:30,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:30,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:28:30,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 532 [2022-12-13 20:28:30,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:28:31,288 INFO L130 PetriNetUnfolder]: 1261/2007 cut-off events. [2022-12-13 20:28:31,288 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-13 20:28:31,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4034 conditions, 2007 events. 1261/2007 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 10388 event pairs, 936 based on Foata normal form. 0/701 useless extension candidates. Maximal degree in co-relation 4025. Up to 1981 conditions per place. [2022-12-13 20:28:31,294 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 46 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2022-12-13 20:28:31,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 48 transitions, 221 flow [2022-12-13 20:28:31,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:28:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:28:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2022-12-13 20:28:31,297 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4592731829573935 [2022-12-13 20:28:31,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2022-12-13 20:28:31,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2022-12-13 20:28:31,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:28:31,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2022-12-13 20:28:31,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:31,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:31,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:31,301 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 131 flow. Second operand 3 states and 733 transitions. [2022-12-13 20:28:31,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 48 transitions, 221 flow [2022-12-13 20:28:31,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 213 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:28:31,302 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 121 flow [2022-12-13 20:28:31,302 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2022-12-13 20:28:31,302 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2022-12-13 20:28:31,302 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 121 flow [2022-12-13 20:28:31,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:31,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:28:31,303 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 20:28:31,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-12-13 20:28:31,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:31,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:28:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:31,504 INFO L85 PathProgramCache]: Analyzing trace with hash 974070, now seen corresponding path program 1 times [2022-12-13 20:28:31,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:28:31,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85908564] [2022-12-13 20:28:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:31,505 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 20:28:31,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:28:31,505 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:31,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:31,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 20:28:31,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:28:31,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:28:31,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:28:31,612 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:28:31,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-13 20:28:31,622 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 10 treesize of output 8 [2022-12-13 20:28:31,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:28:31,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 20:28:31,703 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 20:28:31,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:28:31,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:28:31,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85908564] [2022-12-13 20:28:31,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85908564] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:31,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:31,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:28:31,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810231627] [2022-12-13 20:28:31,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:31,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:28:31,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:28:31,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:28:31,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:28:32,031 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 532 [2022-12-13 20:28:32,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 229.75) internal successors, (919), 4 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:32,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:28:32,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 532 [2022-12-13 20:28:32,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:28:32,367 INFO L130 PetriNetUnfolder]: 843/1399 cut-off events. [2022-12-13 20:28:32,367 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-13 20:28:32,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2821 conditions, 1399 events. 843/1399 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7105 event pairs, 612 based on Foata normal form. 0/579 useless extension candidates. Maximal degree in co-relation 2812. Up to 1379 conditions per place. [2022-12-13 20:28:32,371 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 44 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2022-12-13 20:28:32,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 207 flow [2022-12-13 20:28:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:28:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:28:32,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2022-12-13 20:28:32,373 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45802005012531327 [2022-12-13 20:28:32,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2022-12-13 20:28:32,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2022-12-13 20:28:32,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:28:32,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2022-12-13 20:28:32,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:32,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:32,376 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:32,377 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 121 flow. Second operand 3 states and 731 transitions. [2022-12-13 20:28:32,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 207 flow [2022-12-13 20:28:32,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:28:32,378 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 118 flow [2022-12-13 20:28:32,378 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2022-12-13 20:28:32,378 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2022-12-13 20:28:32,378 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 118 flow [2022-12-13 20:28:32,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 229.75) internal successors, (919), 4 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:32,379 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:28:32,379 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 20:28:32,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 20:28:32,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:32,581 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:28:32,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:32,582 INFO L85 PathProgramCache]: Analyzing trace with hash 972833, now seen corresponding path program 1 times [2022-12-13 20:28:32,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:28:32,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162397699] [2022-12-13 20:28:32,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:32,584 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 20:28:32,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:28:32,587 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:32,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:32,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 20:28:32,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:28:32,744 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:28:32,744 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:28:32,794 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 20:28:32,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:28:32,973 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 20:28:32,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:28:32,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162397699] [2022-12-13 20:28:32,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162397699] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:28:32,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:28:32,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 20:28:32,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659490444] [2022-12-13 20:28:32,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:28:32,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:28:32,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:28:32,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:28:32,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:28:34,369 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 532 [2022-12-13 20:28:34,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:34,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:28:34,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 532 [2022-12-13 20:28:34,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:28:35,774 INFO L130 PetriNetUnfolder]: 1268/2105 cut-off events. [2022-12-13 20:28:35,774 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 20:28:35,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4247 conditions, 2105 events. 1268/2105 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 11372 event pairs, 918 based on Foata normal form. 0/890 useless extension candidates. Maximal degree in co-relation 4237. Up to 691 conditions per place. [2022-12-13 20:28:35,779 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 113 selfloop transitions, 15 changer transitions 0/129 dead transitions. [2022-12-13 20:28:35,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 129 transitions, 566 flow [2022-12-13 20:28:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:28:35,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 20:28:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1430 transitions. [2022-12-13 20:28:35,782 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44799498746867167 [2022-12-13 20:28:35,782 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1430 transitions. [2022-12-13 20:28:35,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1430 transitions. [2022-12-13 20:28:35,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:28:35,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1430 transitions. [2022-12-13 20:28:35,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 238.33333333333334) internal successors, (1430), 6 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:35,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 532.0) internal successors, (3724), 7 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:35,788 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 532.0) internal successors, (3724), 7 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:35,788 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 118 flow. Second operand 6 states and 1430 transitions. [2022-12-13 20:28:35,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 129 transitions, 566 flow [2022-12-13 20:28:35,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 129 transitions, 565 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:28:35,790 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 230 flow [2022-12-13 20:28:35,790 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2022-12-13 20:28:35,790 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2022-12-13 20:28:35,791 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 230 flow [2022-12-13 20:28:35,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 217.0) internal successors, (1302), 6 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:35,791 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:28:35,791 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 20:28:35,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:35,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:35,992 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:28:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash 936103863, now seen corresponding path program 1 times [2022-12-13 20:28:35,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:28:35,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427520037] [2022-12-13 20:28:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:35,993 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 20:28:35,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:28:35,994 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:35,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:36,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:28:36,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:28:36,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:28:36,110 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-13 20:28:36,110 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-12-13 20:28:36,120 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 42 treesize of output 38 [2022-12-13 20:28:36,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:28:36,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 20:28:36,204 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 20:28:36,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:28:36,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:28:36,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427520037] [2022-12-13 20:28:36,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427520037] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:36,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:36,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:28:36,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466408846] [2022-12-13 20:28:36,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:36,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:28:36,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:28:36,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:28:36,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:28:36,534 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 532 [2022-12-13 20:28:36,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:36,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:28:36,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 532 [2022-12-13 20:28:36,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:28:36,955 INFO L130 PetriNetUnfolder]: 1199/1973 cut-off events. [2022-12-13 20:28:36,955 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-12-13 20:28:36,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4031 conditions, 1973 events. 1199/1973 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 10583 event pairs, 864 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 4016. Up to 1946 conditions per place. [2022-12-13 20:28:36,961 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 53 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2022-12-13 20:28:36,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 334 flow [2022-12-13 20:28:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:28:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:28:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 723 transitions. [2022-12-13 20:28:36,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45300751879699247 [2022-12-13 20:28:36,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 723 transitions. [2022-12-13 20:28:36,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 723 transitions. [2022-12-13 20:28:36,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:28:36,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 723 transitions. [2022-12-13 20:28:36,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:36,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:36,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:36,966 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 230 flow. Second operand 3 states and 723 transitions. [2022-12-13 20:28:36,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 334 flow [2022-12-13 20:28:36,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 315 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 20:28:36,968 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 209 flow [2022-12-13 20:28:36,968 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2022-12-13 20:28:36,968 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2022-12-13 20:28:36,968 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 209 flow [2022-12-13 20:28:36,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:36,969 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:28:36,969 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 20:28:36,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:37,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:37,171 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:28:37,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:37,172 INFO L85 PathProgramCache]: Analyzing trace with hash 936103861, now seen corresponding path program 1 times [2022-12-13 20:28:37,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:28:37,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916673967] [2022-12-13 20:28:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:37,174 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 20:28:37,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:28:37,176 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:37,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:37,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:28:37,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:28:37,311 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 20:28:37,311 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-12-13 20:28:37,332 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 20:28:37,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 20:28:37,344 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 20:28:37,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:28:37,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:28:37,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916673967] [2022-12-13 20:28:37,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916673967] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:37,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:37,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:28:37,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906543396] [2022-12-13 20:28:37,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:37,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:28:37,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:28:37,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:28:37,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:28:37,446 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 532 [2022-12-13 20:28:37,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:37,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:28:37,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 532 [2022-12-13 20:28:37,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:28:37,817 INFO L130 PetriNetUnfolder]: 1130/1841 cut-off events. [2022-12-13 20:28:37,817 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-13 20:28:37,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3761 conditions, 1841 events. 1130/1841 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 9624 event pairs, 810 based on Foata normal form. 0/832 useless extension candidates. Maximal degree in co-relation 3745. Up to 1817 conditions per place. [2022-12-13 20:28:37,823 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 51 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-12-13 20:28:37,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 53 transitions, 309 flow [2022-12-13 20:28:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:28:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:28:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2022-12-13 20:28:37,824 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4517543859649123 [2022-12-13 20:28:37,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2022-12-13 20:28:37,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2022-12-13 20:28:37,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:28:37,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2022-12-13 20:28:37,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:37,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:37,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:37,833 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 209 flow. Second operand 3 states and 721 transitions. [2022-12-13 20:28:37,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 53 transitions, 309 flow [2022-12-13 20:28:37,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:28:37,835 INFO L231 Difference]: Finished difference. Result has 51 places, 53 transitions, 206 flow [2022-12-13 20:28:37,835 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2022-12-13 20:28:37,835 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2022-12-13 20:28:37,835 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 206 flow [2022-12-13 20:28:37,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:37,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:28:37,836 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 20:28:37,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:38,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:38,038 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:28:38,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:38,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1045552640, now seen corresponding path program 1 times [2022-12-13 20:28:38,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:28:38,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342395881] [2022-12-13 20:28:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:38,041 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 20:28:38,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:28:38,044 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:38,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:38,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:28:38,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:28:38,188 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 20:28:38,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:28:38,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:28:38,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342395881] [2022-12-13 20:28:38,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342395881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:38,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:38,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:28:38,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363803936] [2022-12-13 20:28:38,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:38,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:28:38,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:28:38,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:28:38,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:28:38,418 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 532 [2022-12-13 20:28:38,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 224.2) internal successors, (1121), 5 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:38,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:28:38,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 532 [2022-12-13 20:28:38,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:28:39,091 INFO L130 PetriNetUnfolder]: 1483/2491 cut-off events. [2022-12-13 20:28:39,091 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-12-13 20:28:39,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5101 conditions, 2491 events. 1483/2491 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 14353 event pairs, 927 based on Foata normal form. 0/1218 useless extension candidates. Maximal degree in co-relation 5084. Up to 1816 conditions per place. [2022-12-13 20:28:39,098 INFO L137 encePairwiseOnDemand]: 523/532 looper letters, 91 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2022-12-13 20:28:39,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 96 transitions, 529 flow [2022-12-13 20:28:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:28:39,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:28:39,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1197 transitions. [2022-12-13 20:28:39,100 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45 [2022-12-13 20:28:39,100 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1197 transitions. [2022-12-13 20:28:39,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1197 transitions. [2022-12-13 20:28:39,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:28:39,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1197 transitions. [2022-12-13 20:28:39,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 239.4) internal successors, (1197), 5 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:39,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:39,105 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:39,105 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 206 flow. Second operand 5 states and 1197 transitions. [2022-12-13 20:28:39,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 96 transitions, 529 flow [2022-12-13 20:28:39,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 96 transitions, 528 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:28:39,106 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 230 flow [2022-12-13 20:28:39,107 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2022-12-13 20:28:39,107 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2022-12-13 20:28:39,107 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 230 flow [2022-12-13 20:28:39,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 224.2) internal successors, (1121), 5 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:39,107 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:28:39,107 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 20:28:39,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:39,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:39,309 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:28:39,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:39,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1075847318, now seen corresponding path program 2 times [2022-12-13 20:28:39,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:28:39,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956212588] [2022-12-13 20:28:39,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:28:39,312 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 20:28:39,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:28:39,315 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:39,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:28:39,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:28:39,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:28:39,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 20:28:39,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:28:39,490 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:28:39,490 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:28:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:28:39,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:28:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:28:40,210 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:28:40,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956212588] [2022-12-13 20:28:40,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956212588] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:28:40,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:28:40,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 20:28:40,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763535238] [2022-12-13 20:28:40,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:28:40,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 20:28:40,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:28:40,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 20:28:40,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:28:46,444 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 532 [2022-12-13 20:28:46,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 230 flow. Second operand has 12 states, 12 states have (on average 219.0) internal successors, (2628), 12 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:46,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:28:46,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 532 [2022-12-13 20:28:46,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:28:49,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:28:51,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:28:52,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:28:56,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:28:58,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:29:03,690 INFO L130 PetriNetUnfolder]: 4924/8260 cut-off events. [2022-12-13 20:29:03,690 INFO L131 PetriNetUnfolder]: For 939/939 co-relation queries the response was YES. [2022-12-13 20:29:03,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18073 conditions, 8260 events. 4924/8260 cut-off events. For 939/939 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 54695 event pairs, 3630 based on Foata normal form. 18/4583 useless extension candidates. Maximal degree in co-relation 18053. Up to 1190 conditions per place. [2022-12-13 20:29:03,714 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 335 selfloop transitions, 32 changer transitions 0/368 dead transitions. [2022-12-13 20:29:03,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 368 transitions, 1876 flow [2022-12-13 20:29:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 20:29:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 20:29:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2985 transitions. [2022-12-13 20:29:03,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4675751879699248 [2022-12-13 20:29:03,724 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2985 transitions. [2022-12-13 20:29:03,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2985 transitions. [2022-12-13 20:29:03,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:29:03,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2985 transitions. [2022-12-13 20:29:03,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 248.75) internal successors, (2985), 12 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:03,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 532.0) internal successors, (6916), 13 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:03,735 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 532.0) internal successors, (6916), 13 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:03,735 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 230 flow. Second operand 12 states and 2985 transitions. [2022-12-13 20:29:03,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 368 transitions, 1876 flow [2022-12-13 20:29:03,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 368 transitions, 1870 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 20:29:03,740 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 468 flow [2022-12-13 20:29:03,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=468, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2022-12-13 20:29:03,740 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 19 predicate places. [2022-12-13 20:29:03,740 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 468 flow [2022-12-13 20:29:03,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 219.0) internal successors, (2628), 12 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:03,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:29:03,741 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:03,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:03,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:03,942 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:29:03,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:03,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1038773658, now seen corresponding path program 1 times [2022-12-13 20:29:03,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:29:03,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565433046] [2022-12-13 20:29:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:03,943 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 20:29:03,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:29:03,944 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:03,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:04,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 20:29:04,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:04,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 20:29:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:04,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:29:04,031 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:29:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565433046] [2022-12-13 20:29:04,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565433046] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:04,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:04,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:29:04,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128054141] [2022-12-13 20:29:04,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:04,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:29:04,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:29:04,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:29:04,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:29:04,226 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 532 [2022-12-13 20:29:04,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 468 flow. Second operand has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:04,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:29:04,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 532 [2022-12-13 20:29:04,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:29:05,070 INFO L130 PetriNetUnfolder]: 3894/6550 cut-off events. [2022-12-13 20:29:05,070 INFO L131 PetriNetUnfolder]: For 852/852 co-relation queries the response was YES. [2022-12-13 20:29:05,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14440 conditions, 6550 events. 3894/6550 cut-off events. For 852/852 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 41127 event pairs, 2740 based on Foata normal form. 0/3849 useless extension candidates. Maximal degree in co-relation 14412. Up to 6422 conditions per place. [2022-12-13 20:29:05,089 INFO L137 encePairwiseOnDemand]: 527/532 looper letters, 64 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2022-12-13 20:29:05,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 598 flow [2022-12-13 20:29:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:29:05,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:29:05,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2022-12-13 20:29:05,091 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42387218045112784 [2022-12-13 20:29:05,091 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2022-12-13 20:29:05,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2022-12-13 20:29:05,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:29:05,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2022-12-13 20:29:05,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:05,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:05,094 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:05,094 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 468 flow. Second operand 4 states and 902 transitions. [2022-12-13 20:29:05,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 598 flow [2022-12-13 20:29:05,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 539 flow, removed 14 selfloop flow, removed 4 redundant places. [2022-12-13 20:29:05,098 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 411 flow [2022-12-13 20:29:05,098 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=411, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2022-12-13 20:29:05,099 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2022-12-13 20:29:05,099 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 411 flow [2022-12-13 20:29:05,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:05,099 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:29:05,099 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:05,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 20:29:05,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:05,300 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:29:05,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1038773659, now seen corresponding path program 1 times [2022-12-13 20:29:05,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:29:05,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421116208] [2022-12-13 20:29:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:05,301 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 20:29:05,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:29:05,302 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:05,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:05,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 20:29:05,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:05,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 20:29:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:05,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:29:05,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:29:05,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421116208] [2022-12-13 20:29:05,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421116208] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:05,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:05,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:29:05,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616167788] [2022-12-13 20:29:05,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:05,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:29:05,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:29:05,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:29:05,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:29:05,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 532 [2022-12-13 20:29:05,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 411 flow. Second operand has 5 states, 5 states have (on average 223.4) internal successors, (1117), 5 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:05,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:29:05,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 532 [2022-12-13 20:29:05,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:29:07,310 INFO L130 PetriNetUnfolder]: 6154/10410 cut-off events. [2022-12-13 20:29:07,311 INFO L131 PetriNetUnfolder]: For 879/879 co-relation queries the response was YES. [2022-12-13 20:29:07,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22437 conditions, 10410 events. 6154/10410 cut-off events. For 879/879 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 73394 event pairs, 2280 based on Foata normal form. 0/6070 useless extension candidates. Maximal degree in co-relation 22408. Up to 5422 conditions per place. [2022-12-13 20:29:07,341 INFO L137 encePairwiseOnDemand]: 527/532 looper letters, 75 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2022-12-13 20:29:07,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 94 transitions, 654 flow [2022-12-13 20:29:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:29:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:29:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1170 transitions. [2022-12-13 20:29:07,343 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4398496240601504 [2022-12-13 20:29:07,343 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1170 transitions. [2022-12-13 20:29:07,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1170 transitions. [2022-12-13 20:29:07,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:29:07,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1170 transitions. [2022-12-13 20:29:07,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:07,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:07,347 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:07,347 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 411 flow. Second operand 5 states and 1170 transitions. [2022-12-13 20:29:07,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 94 transitions, 654 flow [2022-12-13 20:29:07,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 94 transitions, 648 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:29:07,351 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 450 flow [2022-12-13 20:29:07,351 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=450, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2022-12-13 20:29:07,351 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2022-12-13 20:29:07,351 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 450 flow [2022-12-13 20:29:07,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.4) internal successors, (1117), 5 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:07,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:29:07,352 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:07,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:07,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:07,553 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:29:07,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:07,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1038773496, now seen corresponding path program 1 times [2022-12-13 20:29:07,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:29:07,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165516191] [2022-12-13 20:29:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:07,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:29:07,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:29:07,554 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:07,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:07,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:29:07,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:07,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:29:07,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:29:07,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165516191] [2022-12-13 20:29:07,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165516191] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:07,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:07,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:29:07,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459367715] [2022-12-13 20:29:07,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:07,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:29:07,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:29:07,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:29:07,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:29:07,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 532 [2022-12-13 20:29:07,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 450 flow. Second operand has 5 states, 5 states have (on average 224.4) internal successors, (1122), 5 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:07,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:29:07,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 532 [2022-12-13 20:29:07,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:29:09,302 INFO L130 PetriNetUnfolder]: 5746/9642 cut-off events. [2022-12-13 20:29:09,302 INFO L131 PetriNetUnfolder]: For 2937/2937 co-relation queries the response was YES. [2022-12-13 20:29:09,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21740 conditions, 9642 events. 5746/9642 cut-off events. For 2937/2937 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 65194 event pairs, 4080 based on Foata normal form. 14/5900 useless extension candidates. Maximal degree in co-relation 21711. Up to 9112 conditions per place. [2022-12-13 20:29:09,328 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 89 selfloop transitions, 15 changer transitions 0/105 dead transitions. [2022-12-13 20:29:09,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 105 transitions, 752 flow [2022-12-13 20:29:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:29:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:29:09,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1187 transitions. [2022-12-13 20:29:09,330 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4462406015037594 [2022-12-13 20:29:09,330 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1187 transitions. [2022-12-13 20:29:09,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1187 transitions. [2022-12-13 20:29:09,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:29:09,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1187 transitions. [2022-12-13 20:29:09,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 237.4) internal successors, (1187), 5 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:09,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:09,334 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:09,334 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 450 flow. Second operand 5 states and 1187 transitions. [2022-12-13 20:29:09,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 105 transitions, 752 flow [2022-12-13 20:29:09,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 105 transitions, 715 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 20:29:09,339 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 498 flow [2022-12-13 20:29:09,339 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=498, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2022-12-13 20:29:09,340 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2022-12-13 20:29:09,340 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 498 flow [2022-12-13 20:29:09,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 224.4) internal successors, (1122), 5 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:09,340 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:29:09,340 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:09,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-12-13 20:29:09,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:09,542 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:29:09,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:09,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2097407502, now seen corresponding path program 1 times [2022-12-13 20:29:09,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:29:09,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860421475] [2022-12-13 20:29:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:09,544 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 20:29:09,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:29:09,547 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:09,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:09,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 20:29:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:09,732 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:29:09,733 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:29:09,800 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 20:29:09,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-13 20:29:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:29:10,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:29:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:29:10,817 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:29:10,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860421475] [2022-12-13 20:29:10,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860421475] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:29:10,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:29:10,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 20:29:10,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761275942] [2022-12-13 20:29:10,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:29:10,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 20:29:10,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:29:10,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 20:29:10,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:29:20,678 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 532 [2022-12-13 20:29:20,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 498 flow. Second operand has 14 states, 14 states have (on average 205.14285714285714) internal successors, (2872), 14 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:20,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:29:20,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 532 [2022-12-13 20:29:20,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:29:34,510 INFO L130 PetriNetUnfolder]: 11457/19138 cut-off events. [2022-12-13 20:29:34,510 INFO L131 PetriNetUnfolder]: For 5275/5275 co-relation queries the response was YES. [2022-12-13 20:29:34,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44609 conditions, 19138 events. 11457/19138 cut-off events. For 5275/5275 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 142372 event pairs, 3339 based on Foata normal form. 0/11718 useless extension candidates. Maximal degree in co-relation 44577. Up to 3660 conditions per place. [2022-12-13 20:29:34,574 INFO L137 encePairwiseOnDemand]: 518/532 looper letters, 387 selfloop transitions, 73 changer transitions 0/460 dead transitions. [2022-12-13 20:29:34,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 460 transitions, 2626 flow [2022-12-13 20:29:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 20:29:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 20:29:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6556 transitions. [2022-12-13 20:29:34,584 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41077694235588974 [2022-12-13 20:29:34,584 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6556 transitions. [2022-12-13 20:29:34,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6556 transitions. [2022-12-13 20:29:34,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:29:34,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6556 transitions. [2022-12-13 20:29:34,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 218.53333333333333) internal successors, (6556), 30 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:34,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 532.0) internal successors, (16492), 31 states have internal predecessors, (16492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:34,601 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 532.0) internal successors, (16492), 31 states have internal predecessors, (16492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:34,602 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 498 flow. Second operand 30 states and 6556 transitions. [2022-12-13 20:29:34,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 460 transitions, 2626 flow [2022-12-13 20:29:34,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 460 transitions, 2579 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-12-13 20:29:34,621 INFO L231 Difference]: Finished difference. Result has 109 places, 124 transitions, 1003 flow [2022-12-13 20:29:34,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1003, PETRI_PLACES=109, PETRI_TRANSITIONS=124} [2022-12-13 20:29:34,621 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 55 predicate places. [2022-12-13 20:29:34,621 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 124 transitions, 1003 flow [2022-12-13 20:29:34,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 205.14285714285714) internal successors, (2872), 14 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:34,622 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:29:34,622 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:34,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:34,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:34,823 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:29:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:34,823 INFO L85 PathProgramCache]: Analyzing trace with hash 2097407501, now seen corresponding path program 1 times [2022-12-13 20:29:34,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:29:34,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030220047] [2022-12-13 20:29:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:34,824 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 20:29:34,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:29:34,826 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:34,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:34,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 20:29:34,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:34,961 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 20:29:34,961 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 20:29:34,982 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 20:29:34,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 20:29:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:29:34,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:29:34,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:29:34,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030220047] [2022-12-13 20:29:34,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030220047] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:34,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:34,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:29:34,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119692695] [2022-12-13 20:29:34,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:34,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:29:34,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:29:34,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:29:34,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:29:35,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 532 [2022-12-13 20:29:35,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 124 transitions, 1003 flow. Second operand has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:35,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:29:35,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 532 [2022-12-13 20:29:35,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:29:37,163 INFO L130 PetriNetUnfolder]: 8441/14120 cut-off events. [2022-12-13 20:29:37,163 INFO L131 PetriNetUnfolder]: For 11258/11258 co-relation queries the response was YES. [2022-12-13 20:29:37,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36781 conditions, 14120 events. 8441/14120 cut-off events. For 11258/11258 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 98679 event pairs, 6003 based on Foata normal form. 456/11324 useless extension candidates. Maximal degree in co-relation 36742. Up to 14107 conditions per place. [2022-12-13 20:29:37,209 INFO L137 encePairwiseOnDemand]: 527/532 looper letters, 109 selfloop transitions, 12 changer transitions 0/121 dead transitions. [2022-12-13 20:29:37,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 121 transitions, 1235 flow [2022-12-13 20:29:37,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:29:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:29:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 899 transitions. [2022-12-13 20:29:37,211 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4224624060150376 [2022-12-13 20:29:37,212 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 899 transitions. [2022-12-13 20:29:37,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 899 transitions. [2022-12-13 20:29:37,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:29:37,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 899 transitions. [2022-12-13 20:29:37,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:37,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:37,214 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:37,214 INFO L175 Difference]: Start difference. First operand has 109 places, 124 transitions, 1003 flow. Second operand 4 states and 899 transitions. [2022-12-13 20:29:37,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 121 transitions, 1235 flow [2022-12-13 20:29:37,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 121 transitions, 1067 flow, removed 48 selfloop flow, removed 6 redundant places. [2022-12-13 20:29:37,281 INFO L231 Difference]: Finished difference. Result has 103 places, 121 transitions, 849 flow [2022-12-13 20:29:37,281 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=849, PETRI_PLACES=103, PETRI_TRANSITIONS=121} [2022-12-13 20:29:37,281 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2022-12-13 20:29:37,281 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 121 transitions, 849 flow [2022-12-13 20:29:37,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:37,281 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:29:37,281 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:37,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:37,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:37,482 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:29:37,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash 248167507, now seen corresponding path program 1 times [2022-12-13 20:29:37,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:29:37,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302783446] [2022-12-13 20:29:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:37,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:29:37,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:29:37,485 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:37,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:37,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:29:37,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:37,628 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 20:29:37,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:29:37,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:29:37,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302783446] [2022-12-13 20:29:37,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302783446] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:37,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:37,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:29:37,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659141775] [2022-12-13 20:29:37,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:37,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:29:37,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:29:37,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:29:37,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:29:37,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 532 [2022-12-13 20:29:37,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 121 transitions, 849 flow. Second operand has 5 states, 5 states have (on average 224.6) internal successors, (1123), 5 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:37,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:29:37,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 532 [2022-12-13 20:29:37,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:29:39,703 INFO L130 PetriNetUnfolder]: 7339/12938 cut-off events. [2022-12-13 20:29:39,703 INFO L131 PetriNetUnfolder]: For 9035/9035 co-relation queries the response was YES. [2022-12-13 20:29:39,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32938 conditions, 12938 events. 7339/12938 cut-off events. For 9035/9035 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 95901 event pairs, 5013 based on Foata normal form. 120/10728 useless extension candidates. Maximal degree in co-relation 32902. Up to 11308 conditions per place. [2022-12-13 20:29:39,745 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 156 selfloop transitions, 4 changer transitions 0/161 dead transitions. [2022-12-13 20:29:39,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 161 transitions, 1376 flow [2022-12-13 20:29:39,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:29:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:29:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1176 transitions. [2022-12-13 20:29:39,748 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4421052631578947 [2022-12-13 20:29:39,748 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1176 transitions. [2022-12-13 20:29:39,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1176 transitions. [2022-12-13 20:29:39,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:29:39,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1176 transitions. [2022-12-13 20:29:39,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:39,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:39,751 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:39,751 INFO L175 Difference]: Start difference. First operand has 103 places, 121 transitions, 849 flow. Second operand 5 states and 1176 transitions. [2022-12-13 20:29:39,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 161 transitions, 1376 flow [2022-12-13 20:29:39,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 161 transitions, 1363 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:29:39,805 INFO L231 Difference]: Finished difference. Result has 107 places, 122 transitions, 857 flow [2022-12-13 20:29:39,805 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=857, PETRI_PLACES=107, PETRI_TRANSITIONS=122} [2022-12-13 20:29:39,805 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 53 predicate places. [2022-12-13 20:29:39,805 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 122 transitions, 857 flow [2022-12-13 20:29:39,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 224.6) internal successors, (1123), 5 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:39,806 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:29:39,806 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:39,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-13 20:29:40,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:40,007 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:29:40,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:40,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1830823306, now seen corresponding path program 1 times [2022-12-13 20:29:40,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:29:40,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310141121] [2022-12-13 20:29:40,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:40,010 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 20:29:40,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:29:40,013 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:40,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:40,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:29:40,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:40,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:29:40,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:29:40,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310141121] [2022-12-13 20:29:40,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310141121] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:40,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:40,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:29:40,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811696122] [2022-12-13 20:29:40,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:40,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:29:40,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:29:40,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:29:40,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:29:40,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 532 [2022-12-13 20:29:40,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 122 transitions, 857 flow. Second operand has 5 states, 5 states have (on average 224.8) internal successors, (1124), 5 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:40,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:29:40,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 532 [2022-12-13 20:29:40,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:29:42,241 INFO L130 PetriNetUnfolder]: 7183/12664 cut-off events. [2022-12-13 20:29:42,241 INFO L131 PetriNetUnfolder]: For 12282/12282 co-relation queries the response was YES. [2022-12-13 20:29:42,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35368 conditions, 12664 events. 7183/12664 cut-off events. For 12282/12282 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 94087 event pairs, 5107 based on Foata normal form. 48/11986 useless extension candidates. Maximal degree in co-relation 35330. Up to 11873 conditions per place. [2022-12-13 20:29:42,297 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 124 selfloop transitions, 18 changer transitions 0/143 dead transitions. [2022-12-13 20:29:42,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 143 transitions, 1202 flow [2022-12-13 20:29:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:29:42,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:29:42,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1173 transitions. [2022-12-13 20:29:42,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4409774436090226 [2022-12-13 20:29:42,300 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1173 transitions. [2022-12-13 20:29:42,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1173 transitions. [2022-12-13 20:29:42,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:29:42,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1173 transitions. [2022-12-13 20:29:42,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.6) internal successors, (1173), 5 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:42,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:42,305 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:42,305 INFO L175 Difference]: Start difference. First operand has 107 places, 122 transitions, 857 flow. Second operand 5 states and 1173 transitions. [2022-12-13 20:29:42,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 143 transitions, 1202 flow [2022-12-13 20:29:42,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 143 transitions, 1193 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 20:29:42,395 INFO L231 Difference]: Finished difference. Result has 108 places, 122 transitions, 895 flow [2022-12-13 20:29:42,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=895, PETRI_PLACES=108, PETRI_TRANSITIONS=122} [2022-12-13 20:29:42,396 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 54 predicate places. [2022-12-13 20:29:42,396 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 122 transitions, 895 flow [2022-12-13 20:29:42,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 224.8) internal successors, (1124), 5 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:42,396 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:29:42,396 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:42,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 20:29:42,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:42,598 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:29:42,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:42,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1921954463, now seen corresponding path program 2 times [2022-12-13 20:29:42,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:29:42,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642260559] [2022-12-13 20:29:42,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:29:42,601 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 20:29:42,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:29:42,604 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:42,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:42,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 20:29:42,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:29:42,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 20:29:42,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:42,769 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:29:42,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:29:42,823 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 20:29:42,823 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 20:29:42,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:29:42,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 20:29:42,905 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 20:29:42,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 20:29:42,972 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 20:29:42,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:29:42,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:29:42,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642260559] [2022-12-13 20:29:42,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642260559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:42,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:42,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:29:42,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586119917] [2022-12-13 20:29:42,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:42,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:29:42,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:29:42,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:29:42,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:29:43,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 532 [2022-12-13 20:29:43,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 122 transitions, 895 flow. Second operand has 5 states, 5 states have (on average 219.6) internal successors, (1098), 5 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:43,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:29:43,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 532 [2022-12-13 20:29:43,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:29:45,590 INFO L130 PetriNetUnfolder]: 7012/12409 cut-off events. [2022-12-13 20:29:45,590 INFO L131 PetriNetUnfolder]: For 17872/17872 co-relation queries the response was YES. [2022-12-13 20:29:45,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36993 conditions, 12409 events. 7012/12409 cut-off events. For 17872/17872 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 92652 event pairs, 2912 based on Foata normal form. 108/11833 useless extension candidates. Maximal degree in co-relation 36955. Up to 7180 conditions per place. [2022-12-13 20:29:45,632 INFO L137 encePairwiseOnDemand]: 527/532 looper letters, 115 selfloop transitions, 29 changer transitions 0/145 dead transitions. [2022-12-13 20:29:45,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 145 transitions, 1288 flow [2022-12-13 20:29:45,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:29:45,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:29:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1141 transitions. [2022-12-13 20:29:45,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42894736842105263 [2022-12-13 20:29:45,635 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1141 transitions. [2022-12-13 20:29:45,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1141 transitions. [2022-12-13 20:29:45,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:29:45,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1141 transitions. [2022-12-13 20:29:45,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 228.2) internal successors, (1141), 5 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:45,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:45,638 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:45,638 INFO L175 Difference]: Start difference. First operand has 108 places, 122 transitions, 895 flow. Second operand 5 states and 1141 transitions. [2022-12-13 20:29:45,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 145 transitions, 1288 flow [2022-12-13 20:29:45,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 145 transitions, 1258 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:29:45,734 INFO L231 Difference]: Finished difference. Result has 111 places, 122 transitions, 942 flow [2022-12-13 20:29:45,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=942, PETRI_PLACES=111, PETRI_TRANSITIONS=122} [2022-12-13 20:29:45,734 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 57 predicate places. [2022-12-13 20:29:45,735 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 122 transitions, 942 flow [2022-12-13 20:29:45,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 219.6) internal successors, (1098), 5 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:45,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:29:45,735 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:45,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:45,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:45,937 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:29:45,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:45,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1270853920, now seen corresponding path program 1 times [2022-12-13 20:29:45,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:29:45,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998262491] [2022-12-13 20:29:45,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:45,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:29:45,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:29:45,942 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:45,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:29:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 20:29:46,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:46,159 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:29:46,160 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:29:46,217 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 20:29:46,217 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 20:29:46,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:29:46,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 20:29:46,286 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 20:29:46,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 20:29:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:46,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:29:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:48,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:29:48,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998262491] [2022-12-13 20:29:48,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998262491] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:29:48,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:29:48,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 20:29:48,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4130385] [2022-12-13 20:29:48,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:29:48,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 20:29:48,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:29:48,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 20:29:48,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:29:52,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 532 [2022-12-13 20:29:52,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 122 transitions, 942 flow. Second operand has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:52,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:29:52,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 532 [2022-12-13 20:29:52,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:30:02,600 INFO L130 PetriNetUnfolder]: 12711/22047 cut-off events. [2022-12-13 20:30:02,600 INFO L131 PetriNetUnfolder]: For 40892/40892 co-relation queries the response was YES. [2022-12-13 20:30:02,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68873 conditions, 22047 events. 12711/22047 cut-off events. For 40892/40892 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 177535 event pairs, 7019 based on Foata normal form. 0/21059 useless extension candidates. Maximal degree in co-relation 68833. Up to 4247 conditions per place. [2022-12-13 20:30:02,703 INFO L137 encePairwiseOnDemand]: 522/532 looper letters, 437 selfloop transitions, 54 changer transitions 0/492 dead transitions. [2022-12-13 20:30:02,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 492 transitions, 3620 flow [2022-12-13 20:30:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 20:30:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 20:30:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5941 transitions. [2022-12-13 20:30:02,710 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4136034530771373 [2022-12-13 20:30:02,710 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5941 transitions. [2022-12-13 20:30:02,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5941 transitions. [2022-12-13 20:30:02,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:30:02,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5941 transitions. [2022-12-13 20:30:02,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 220.03703703703704) internal successors, (5941), 27 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:02,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 532.0) internal successors, (14896), 28 states have internal predecessors, (14896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:02,723 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 532.0) internal successors, (14896), 28 states have internal predecessors, (14896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:02,724 INFO L175 Difference]: Start difference. First operand has 111 places, 122 transitions, 942 flow. Second operand 27 states and 5941 transitions. [2022-12-13 20:30:02,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 492 transitions, 3620 flow [2022-12-13 20:30:02,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 492 transitions, 3484 flow, removed 15 selfloop flow, removed 5 redundant places. [2022-12-13 20:30:02,983 INFO L231 Difference]: Finished difference. Result has 138 places, 144 transitions, 1200 flow [2022-12-13 20:30:02,983 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1200, PETRI_PLACES=138, PETRI_TRANSITIONS=144} [2022-12-13 20:30:02,984 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2022-12-13 20:30:02,984 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 144 transitions, 1200 flow [2022-12-13 20:30:02,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:02,984 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:30:02,984 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:02,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 20:30:03,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:03,186 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:30:03,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:03,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1270853881, now seen corresponding path program 1 times [2022-12-13 20:30:03,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:30:03,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293615435] [2022-12-13 20:30:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:03,188 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 20:30:03,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:30:03,191 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:03,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:03,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:30:03,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:03,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:03,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-13 20:30:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:03,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:30:03,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293615435] [2022-12-13 20:30:03,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293615435] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:03,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:30:03,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 20:30:03,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995367063] [2022-12-13 20:30:03,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:03,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 20:30:03,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:30:03,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 20:30:03,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:30:05,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 532 [2022-12-13 20:30:05,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 144 transitions, 1200 flow. Second operand has 10 states, 10 states have (on average 215.8) internal successors, (2158), 10 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:05,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:30:05,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 532 [2022-12-13 20:30:05,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:30:10,544 INFO L130 PetriNetUnfolder]: 13236/22988 cut-off events. [2022-12-13 20:30:10,544 INFO L131 PetriNetUnfolder]: For 90320/90320 co-relation queries the response was YES. [2022-12-13 20:30:10,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88576 conditions, 22988 events. 13236/22988 cut-off events. For 90320/90320 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 185717 event pairs, 5496 based on Foata normal form. 986/23974 useless extension candidates. Maximal degree in co-relation 88531. Up to 11764 conditions per place. [2022-12-13 20:30:10,658 INFO L137 encePairwiseOnDemand]: 523/532 looper letters, 248 selfloop transitions, 54 changer transitions 0/303 dead transitions. [2022-12-13 20:30:10,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 303 transitions, 2749 flow [2022-12-13 20:30:10,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:30:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 20:30:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2495 transitions. [2022-12-13 20:30:10,661 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42634996582365003 [2022-12-13 20:30:10,661 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2495 transitions. [2022-12-13 20:30:10,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2495 transitions. [2022-12-13 20:30:10,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:30:10,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2495 transitions. [2022-12-13 20:30:10,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 226.8181818181818) internal successors, (2495), 11 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:10,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 532.0) internal successors, (6384), 12 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:10,666 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 532.0) internal successors, (6384), 12 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:10,666 INFO L175 Difference]: Start difference. First operand has 138 places, 144 transitions, 1200 flow. Second operand 11 states and 2495 transitions. [2022-12-13 20:30:10,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 303 transitions, 2749 flow [2022-12-13 20:30:11,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 303 transitions, 2653 flow, removed 32 selfloop flow, removed 5 redundant places. [2022-12-13 20:30:11,887 INFO L231 Difference]: Finished difference. Result has 147 places, 149 transitions, 1362 flow [2022-12-13 20:30:11,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1362, PETRI_PLACES=147, PETRI_TRANSITIONS=149} [2022-12-13 20:30:11,887 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 93 predicate places. [2022-12-13 20:30:11,888 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 149 transitions, 1362 flow [2022-12-13 20:30:11,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 215.8) internal successors, (2158), 10 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:11,888 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:30:11,888 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:11,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 20:30:12,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:12,090 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:30:12,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:12,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1268972420, now seen corresponding path program 1 times [2022-12-13 20:30:12,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:30:12,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329900380] [2022-12-13 20:30:12,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:12,092 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 20:30:12,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:30:12,095 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:12,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:12,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 20:30:12,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:30:12,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:30:12,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:30:12,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329900380] [2022-12-13 20:30:12,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329900380] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:30:12,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:30:12,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:30:12,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204047004] [2022-12-13 20:30:12,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:30:12,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:30:12,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:30:12,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:30:12,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:30:12,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 532 [2022-12-13 20:30:12,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 149 transitions, 1362 flow. Second operand has 6 states, 6 states have (on average 221.66666666666666) internal successors, (1330), 6 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:12,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:30:12,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 532 [2022-12-13 20:30:12,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:30:16,508 INFO L130 PetriNetUnfolder]: 14113/24967 cut-off events. [2022-12-13 20:30:16,508 INFO L131 PetriNetUnfolder]: For 156074/156074 co-relation queries the response was YES. [2022-12-13 20:30:16,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104610 conditions, 24967 events. 14113/24967 cut-off events. For 156074/156074 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 208682 event pairs, 5880 based on Foata normal form. 450/25417 useless extension candidates. Maximal degree in co-relation 104560. Up to 13792 conditions per place. [2022-12-13 20:30:16,656 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 200 selfloop transitions, 38 changer transitions 0/239 dead transitions. [2022-12-13 20:30:16,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 239 transitions, 2646 flow [2022-12-13 20:30:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:30:16,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:30:16,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1167 transitions. [2022-12-13 20:30:16,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4387218045112782 [2022-12-13 20:30:16,658 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1167 transitions. [2022-12-13 20:30:16,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1167 transitions. [2022-12-13 20:30:16,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:30:16,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1167 transitions. [2022-12-13 20:30:16,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 233.4) internal successors, (1167), 5 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:16,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:16,661 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 532.0) internal successors, (3192), 6 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:16,661 INFO L175 Difference]: Start difference. First operand has 147 places, 149 transitions, 1362 flow. Second operand 5 states and 1167 transitions. [2022-12-13 20:30:16,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 239 transitions, 2646 flow [2022-12-13 20:30:17,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 239 transitions, 2570 flow, removed 19 selfloop flow, removed 4 redundant places. [2022-12-13 20:30:17,769 INFO L231 Difference]: Finished difference. Result has 149 places, 169 transitions, 1708 flow [2022-12-13 20:30:17,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1708, PETRI_PLACES=149, PETRI_TRANSITIONS=169} [2022-12-13 20:30:17,770 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 95 predicate places. [2022-12-13 20:30:17,770 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 169 transitions, 1708 flow [2022-12-13 20:30:17,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.66666666666666) internal successors, (1330), 6 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:17,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:30:17,770 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:17,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-12-13 20:30:17,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:17,972 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:30:17,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:17,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1268974124, now seen corresponding path program 1 times [2022-12-13 20:30:17,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:30:17,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344306535] [2022-12-13 20:30:17,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:17,974 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 20:30:17,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:30:17,977 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:17,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:18,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 20:30:18,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:18,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 20:30:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:30:18,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:30:18,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:30:18,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344306535] [2022-12-13 20:30:18,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344306535] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:18,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:30:18,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-12-13 20:30:18,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850950488] [2022-12-13 20:30:18,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:18,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 20:30:18,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:30:18,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 20:30:18,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:30:24,356 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 532 [2022-12-13 20:30:24,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 169 transitions, 1708 flow. Second operand has 12 states, 12 states have (on average 216.5) internal successors, (2598), 12 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:24,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:30:24,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 532 [2022-12-13 20:30:24,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:30:34,062 INFO L130 PetriNetUnfolder]: 29449/51927 cut-off events. [2022-12-13 20:30:34,062 INFO L131 PetriNetUnfolder]: For 472359/472359 co-relation queries the response was YES. [2022-12-13 20:30:34,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233894 conditions, 51927 events. 29449/51927 cut-off events. For 472359/472359 co-relation queries the response was YES. Maximal size of possible extension queue 1890. Compared 469841 event pairs, 3756 based on Foata normal form. 1350/53277 useless extension candidates. Maximal degree in co-relation 233843. Up to 10667 conditions per place. [2022-12-13 20:30:34,483 INFO L137 encePairwiseOnDemand]: 522/532 looper letters, 320 selfloop transitions, 105 changer transitions 0/426 dead transitions. [2022-12-13 20:30:34,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 426 transitions, 5026 flow [2022-12-13 20:30:34,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:30:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 20:30:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2284 transitions. [2022-12-13 20:30:34,487 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4293233082706767 [2022-12-13 20:30:34,487 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2284 transitions. [2022-12-13 20:30:34,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2284 transitions. [2022-12-13 20:30:34,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:30:34,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2284 transitions. [2022-12-13 20:30:34,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 228.4) internal successors, (2284), 10 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:34,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 532.0) internal successors, (5852), 11 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:34,492 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 532.0) internal successors, (5852), 11 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:34,493 INFO L175 Difference]: Start difference. First operand has 149 places, 169 transitions, 1708 flow. Second operand 10 states and 2284 transitions. [2022-12-13 20:30:34,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 426 transitions, 5026 flow [2022-12-13 20:30:37,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 426 transitions, 4976 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 20:30:37,174 INFO L231 Difference]: Finished difference. Result has 161 places, 223 transitions, 2750 flow [2022-12-13 20:30:37,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2750, PETRI_PLACES=161, PETRI_TRANSITIONS=223} [2022-12-13 20:30:37,174 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 107 predicate places. [2022-12-13 20:30:37,175 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 223 transitions, 2750 flow [2022-12-13 20:30:37,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 216.5) internal successors, (2598), 12 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:37,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:30:37,175 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:37,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:37,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:37,376 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:30:37,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:37,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1268973961, now seen corresponding path program 1 times [2022-12-13 20:30:37,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:30:37,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746606558] [2022-12-13 20:30:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:37,379 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 20:30:37,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:30:37,382 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:37,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:37,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 20:30:37,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:37,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:37,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:30:37,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746606558] [2022-12-13 20:30:37,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746606558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:37,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:30:37,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 20:30:37,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641471528] [2022-12-13 20:30:37,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:37,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 20:30:37,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:30:37,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 20:30:37,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:30:38,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 532 [2022-12-13 20:30:38,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 223 transitions, 2750 flow. Second operand has 12 states, 12 states have (on average 220.66666666666666) internal successors, (2648), 12 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:38,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:30:38,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 532 [2022-12-13 20:30:38,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:30:47,000 INFO L130 PetriNetUnfolder]: 23122/40656 cut-off events. [2022-12-13 20:30:47,000 INFO L131 PetriNetUnfolder]: For 378436/378436 co-relation queries the response was YES. [2022-12-13 20:30:47,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202115 conditions, 40656 events. 23122/40656 cut-off events. For 378436/378436 co-relation queries the response was YES. Maximal size of possible extension queue 1387. Compared 355013 event pairs, 15703 based on Foata normal form. 288/40944 useless extension candidates. Maximal degree in co-relation 202059. Up to 33405 conditions per place. [2022-12-13 20:30:47,315 INFO L137 encePairwiseOnDemand]: 522/532 looper letters, 286 selfloop transitions, 31 changer transitions 0/318 dead transitions. [2022-12-13 20:30:47,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 318 transitions, 4165 flow [2022-12-13 20:30:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:30:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 20:30:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2524 transitions. [2022-12-13 20:30:47,318 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43130553656869447 [2022-12-13 20:30:47,318 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2524 transitions. [2022-12-13 20:30:47,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2524 transitions. [2022-12-13 20:30:47,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:30:47,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2524 transitions. [2022-12-13 20:30:47,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 229.45454545454547) internal successors, (2524), 11 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:47,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 532.0) internal successors, (6384), 12 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:47,324 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 532.0) internal successors, (6384), 12 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:47,324 INFO L175 Difference]: Start difference. First operand has 161 places, 223 transitions, 2750 flow. Second operand 11 states and 2524 transitions. [2022-12-13 20:30:47,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 318 transitions, 4165 flow [2022-12-13 20:30:52,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 318 transitions, 4010 flow, removed 52 selfloop flow, removed 4 redundant places. [2022-12-13 20:30:52,902 INFO L231 Difference]: Finished difference. Result has 169 places, 211 transitions, 2619 flow [2022-12-13 20:30:52,902 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=2391, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2619, PETRI_PLACES=169, PETRI_TRANSITIONS=211} [2022-12-13 20:30:52,902 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 115 predicate places. [2022-12-13 20:30:52,903 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 211 transitions, 2619 flow [2022-12-13 20:30:52,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 220.66666666666666) internal successors, (2648), 12 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:52,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:30:52,903 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:52,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:53,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:53,105 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:30:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1519947379, now seen corresponding path program 1 times [2022-12-13 20:30:53,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:30:53,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259100848] [2022-12-13 20:30:53,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:53,108 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 20:30:53,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:30:53,111 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:53,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:30:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:53,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 20:30:53,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:53,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:53,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:30:53,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259100848] [2022-12-13 20:30:53,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259100848] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:53,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:30:53,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 20:30:53,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234181195] [2022-12-13 20:30:53,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:53,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 20:30:53,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:30:53,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 20:30:53,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:30:54,761 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 532 [2022-12-13 20:30:54,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 211 transitions, 2619 flow. Second operand has 12 states, 12 states have (on average 221.0) internal successors, (2652), 12 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:54,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:30:54,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 532 [2022-12-13 20:30:54,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:31:02,838 INFO L130 PetriNetUnfolder]: 22141/39351 cut-off events. [2022-12-13 20:31:02,838 INFO L131 PetriNetUnfolder]: For 358797/358797 co-relation queries the response was YES. [2022-12-13 20:31:03,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188261 conditions, 39351 events. 22141/39351 cut-off events. For 358797/358797 co-relation queries the response was YES. Maximal size of possible extension queue 1372. Compared 346559 event pairs, 15815 based on Foata normal form. 810/40161 useless extension candidates. Maximal degree in co-relation 188203. Up to 33405 conditions per place. [2022-12-13 20:31:03,181 INFO L137 encePairwiseOnDemand]: 522/532 looper letters, 267 selfloop transitions, 35 changer transitions 0/303 dead transitions. [2022-12-13 20:31:03,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 303 transitions, 3772 flow [2022-12-13 20:31:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:31:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 20:31:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2519 transitions. [2022-12-13 20:31:03,186 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43045112781954886 [2022-12-13 20:31:03,186 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2519 transitions. [2022-12-13 20:31:03,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2519 transitions. [2022-12-13 20:31:03,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:31:03,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2519 transitions. [2022-12-13 20:31:03,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 229.0) internal successors, (2519), 11 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:03,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 532.0) internal successors, (6384), 12 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:03,192 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 532.0) internal successors, (6384), 12 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:03,192 INFO L175 Difference]: Start difference. First operand has 169 places, 211 transitions, 2619 flow. Second operand 11 states and 2519 transitions. [2022-12-13 20:31:03,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 303 transitions, 3772 flow [2022-12-13 20:31:06,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 303 transitions, 3735 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 20:31:06,943 INFO L231 Difference]: Finished difference. Result has 177 places, 211 transitions, 2698 flow [2022-12-13 20:31:06,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=2599, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2698, PETRI_PLACES=177, PETRI_TRANSITIONS=211} [2022-12-13 20:31:06,944 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 123 predicate places. [2022-12-13 20:31:06,944 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 211 transitions, 2698 flow [2022-12-13 20:31:06,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 221.0) internal successors, (2652), 12 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:06,945 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:31:06,945 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:06,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:31:07,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:31:07,146 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:31:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:07,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1782774016, now seen corresponding path program 2 times [2022-12-13 20:31:07,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:31:07,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751579179] [2022-12-13 20:31:07,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:31:07,148 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 20:31:07,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:31:07,151 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:31:07,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:31:07,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:31:07,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:07,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 20:31:07,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:07,315 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 20:31:07,315 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 20:31:07,362 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 20:31:07,362 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 20:31:07,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:31:07,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 20:31:07,426 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 20:31:07,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 20:31:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:31:07,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:31:10,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:31:10,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751579179] [2022-12-13 20:31:10,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751579179] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:10,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:31:10,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 20:31:10,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757163583] [2022-12-13 20:31:10,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:10,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 20:31:10,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:31:10,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 20:31:10,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:31:14,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:31:17,732 WARN L539 Checker$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 20:31:23,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:31:25,702 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 532 [2022-12-13 20:31:25,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 211 transitions, 2698 flow. Second operand has 14 states, 14 states have (on average 206.57142857142858) internal successors, (2892), 14 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:25,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:31:25,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 532 [2022-12-13 20:31:25,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:31:36,048 INFO L130 PetriNetUnfolder]: 23752/41208 cut-off events. [2022-12-13 20:31:36,048 INFO L131 PetriNetUnfolder]: For 468793/468793 co-relation queries the response was YES. [2022-12-13 20:31:36,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202289 conditions, 41208 events. 23752/41208 cut-off events. For 468793/468793 co-relation queries the response was YES. Maximal size of possible extension queue 1389. Compared 350963 event pairs, 6570 based on Foata normal form. 306/41514 useless extension candidates. Maximal degree in co-relation 202229. Up to 9776 conditions per place. [2022-12-13 20:31:36,373 INFO L137 encePairwiseOnDemand]: 523/532 looper letters, 409 selfloop transitions, 70 changer transitions 0/479 dead transitions. [2022-12-13 20:31:36,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 479 transitions, 5632 flow [2022-12-13 20:31:36,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 20:31:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 20:31:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3763 transitions. [2022-12-13 20:31:36,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4160769570986289 [2022-12-13 20:31:36,378 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3763 transitions. [2022-12-13 20:31:36,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3763 transitions. [2022-12-13 20:31:36,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:31:36,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3763 transitions. [2022-12-13 20:31:36,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 221.35294117647058) internal successors, (3763), 17 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:36,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 532.0) internal successors, (9576), 18 states have internal predecessors, (9576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:36,391 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 532.0) internal successors, (9576), 18 states have internal predecessors, (9576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:36,391 INFO L175 Difference]: Start difference. First operand has 177 places, 211 transitions, 2698 flow. Second operand 17 states and 3763 transitions. [2022-12-13 20:31:36,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 479 transitions, 5632 flow [2022-12-13 20:31:40,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 479 transitions, 5587 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 20:31:40,320 INFO L231 Difference]: Finished difference. Result has 192 places, 217 transitions, 2911 flow [2022-12-13 20:31:40,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=2659, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2911, PETRI_PLACES=192, PETRI_TRANSITIONS=217} [2022-12-13 20:31:40,321 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 138 predicate places. [2022-12-13 20:31:40,321 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 217 transitions, 2911 flow [2022-12-13 20:31:40,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 206.57142857142858) internal successors, (2892), 14 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:40,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:31:40,321 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:40,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-13 20:31:40,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:31:40,523 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:31:40,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:40,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1360561194, now seen corresponding path program 2 times [2022-12-13 20:31:40,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:31:40,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083369287] [2022-12-13 20:31:40,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:31:40,526 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 20:31:40,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:31:40,528 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:31:40,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:31:40,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:31:40,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:40,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 20:31:40,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:40,726 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 20:31:40,726 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 20:31:40,766 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 20:31:40,767 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 20:31:40,895 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:31:40,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-12-13 20:31:40,907 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 20:31:40,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 20:31:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:31:40,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:31:43,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:31:43,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083369287] [2022-12-13 20:31:43,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083369287] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:43,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:31:43,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-12-13 20:31:43,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639117387] [2022-12-13 20:31:43,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:43,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 20:31:43,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:31:43,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 20:31:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-12-13 20:31:51,826 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 532 [2022-12-13 20:31:51,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 217 transitions, 2911 flow. Second operand has 15 states, 15 states have (on average 209.73333333333332) internal successors, (3146), 15 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:51,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:31:51,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 532 [2022-12-13 20:31:51,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:32:03,664 INFO L130 PetriNetUnfolder]: 27505/48673 cut-off events. [2022-12-13 20:32:03,664 INFO L131 PetriNetUnfolder]: For 502002/502002 co-relation queries the response was YES. [2022-12-13 20:32:03,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248369 conditions, 48673 events. 27505/48673 cut-off events. For 502002/502002 co-relation queries the response was YES. Maximal size of possible extension queue 1748. Compared 444386 event pairs, 12314 based on Foata normal form. 2300/50969 useless extension candidates. Maximal degree in co-relation 248305. Up to 20776 conditions per place. [2022-12-13 20:32:04,080 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 406 selfloop transitions, 57 changer transitions 0/464 dead transitions. [2022-12-13 20:32:04,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 464 transitions, 5830 flow [2022-12-13 20:32:04,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 20:32:04,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 20:32:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2922 transitions. [2022-12-13 20:32:04,085 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4224985540775014 [2022-12-13 20:32:04,085 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2922 transitions. [2022-12-13 20:32:04,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2922 transitions. [2022-12-13 20:32:04,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:32:04,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2922 transitions. [2022-12-13 20:32:04,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 224.76923076923077) internal successors, (2922), 13 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:32:04,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 532.0) internal successors, (7448), 14 states have internal predecessors, (7448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:32:04,092 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 532.0) internal successors, (7448), 14 states have internal predecessors, (7448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:32:04,092 INFO L175 Difference]: Start difference. First operand has 192 places, 217 transitions, 2911 flow. Second operand 13 states and 2922 transitions. [2022-12-13 20:32:04,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 464 transitions, 5830 flow [2022-12-13 20:32:10,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 464 transitions, 5444 flow, removed 93 selfloop flow, removed 8 redundant places. [2022-12-13 20:32:10,481 INFO L231 Difference]: Finished difference. Result has 198 places, 221 transitions, 2973 flow [2022-12-13 20:32:10,481 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=2569, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2973, PETRI_PLACES=198, PETRI_TRANSITIONS=221} [2022-12-13 20:32:10,481 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 144 predicate places. [2022-12-13 20:32:10,481 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 221 transitions, 2973 flow [2022-12-13 20:32:10,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 209.73333333333332) internal successors, (3146), 15 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:32:10,481 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:32:10,482 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:32:10,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-12-13 20:32:10,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:32:10,683 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:32:10,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:32:10,684 INFO L85 PathProgramCache]: Analyzing trace with hash -510298027, now seen corresponding path program 1 times [2022-12-13 20:32:10,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:32:10,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670107495] [2022-12-13 20:32:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:32:10,686 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 20:32:10,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:32:10,688 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:32:10,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:32:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:10,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 20:32:10,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:32:10,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 20:32:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 20:32:10,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:32:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 20:32:11,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:32:11,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670107495] [2022-12-13 20:32:11,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670107495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:32:11,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:32:11,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 20:32:11,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708551017] [2022-12-13 20:32:11,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:32:11,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 20:32:11,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:32:11,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 20:32:11,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:32:14,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 532 [2022-12-13 20:32:14,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 221 transitions, 2973 flow. Second operand has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:32:14,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:32:14,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 532 [2022-12-13 20:32:14,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:32:28,496 INFO L130 PetriNetUnfolder]: 38289/66375 cut-off events. [2022-12-13 20:32:28,496 INFO L131 PetriNetUnfolder]: For 561004/561004 co-relation queries the response was YES. [2022-12-13 20:32:28,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382942 conditions, 66375 events. 38289/66375 cut-off events. For 561004/561004 co-relation queries the response was YES. Maximal size of possible extension queue 2285. Compared 611209 event pairs, 9113 based on Foata normal form. 4740/71115 useless extension candidates. Maximal degree in co-relation 382881. Up to 21439 conditions per place. [2022-12-13 20:32:29,099 INFO L137 encePairwiseOnDemand]: 526/532 looper letters, 399 selfloop transitions, 102 changer transitions 0/502 dead transitions. [2022-12-13 20:32:29,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 502 transitions, 7177 flow [2022-12-13 20:32:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 20:32:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 20:32:29,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1848 transitions. [2022-12-13 20:32:29,103 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4342105263157895 [2022-12-13 20:32:29,103 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1848 transitions. [2022-12-13 20:32:29,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1848 transitions. [2022-12-13 20:32:29,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:32:29,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1848 transitions. [2022-12-13 20:32:29,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 231.0) internal successors, (1848), 8 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 20:32:29,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 532.0) internal successors, (4788), 9 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:32:29,108 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 532.0) internal successors, (4788), 9 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:32:29,108 INFO L175 Difference]: Start difference. First operand has 198 places, 221 transitions, 2973 flow. Second operand 8 states and 1848 transitions. [2022-12-13 20:32:29,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 502 transitions, 7177 flow [2022-12-13 20:32:40,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 502 transitions, 6894 flow, removed 107 selfloop flow, removed 7 redundant places. [2022-12-13 20:32:40,982 INFO L231 Difference]: Finished difference. Result has 202 places, 237 transitions, 3519 flow [2022-12-13 20:32:40,983 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3519, PETRI_PLACES=202, PETRI_TRANSITIONS=237} [2022-12-13 20:32:40,983 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 148 predicate places. [2022-12-13 20:32:40,983 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 237 transitions, 3519 flow [2022-12-13 20:32:40,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:32:40,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:32:40,983 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 20:32:40,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 20:32:41,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:32:41,185 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:32:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:32:41,186 INFO L85 PathProgramCache]: Analyzing trace with hash -434809846, now seen corresponding path program 3 times [2022-12-13 20:32:41,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:32:41,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445579694] [2022-12-13 20:32:41,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:32:41,187 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 20:32:41,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:32:41,190 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:32:41,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-13 20:32:41,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 20:32:41,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:32:41,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 20:32:41,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:32:41,490 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:32:41,491 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:32:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:32:41,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:32:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:32:44,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:32:44,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445579694] [2022-12-13 20:32:44,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445579694] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:32:44,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:32:44,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 20:32:44,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248846736] [2022-12-13 20:32:44,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:32:44,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 20:32:44,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:32:44,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 20:32:44,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 20:33:08,425 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 532 [2022-12-13 20:33:08,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 237 transitions, 3519 flow. Second operand has 24 states, 24 states have (on average 217.0) internal successors, (5208), 24 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:33:08,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:33:08,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 532 [2022-12-13 20:33:08,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:33:19,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:21,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:23,132 WARN L539 Checker$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 20:33:25,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:27,172 WARN L539 Checker$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 20:33:29,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:30,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:32,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:34,869 WARN L539 Checker$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 20:33:36,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:34:04,112 INFO L130 PetriNetUnfolder]: 51003/89209 cut-off events. [2022-12-13 20:34:04,112 INFO L131 PetriNetUnfolder]: For 1224674/1224674 co-relation queries the response was YES. [2022-12-13 20:34:04,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516596 conditions, 89209 events. 51003/89209 cut-off events. For 1224674/1224674 co-relation queries the response was YES. Maximal size of possible extension queue 2779. Compared 849195 event pairs, 39677 based on Foata normal form. 24/89227 useless extension candidates. Maximal degree in co-relation 516533. Up to 21837 conditions per place. [2022-12-13 20:34:05,113 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 997 selfloop transitions, 77 changer transitions 0/1075 dead transitions. [2022-12-13 20:34:05,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1075 transitions, 19486 flow [2022-12-13 20:34:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 20:34:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 20:34:05,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 5794 transitions. [2022-12-13 20:34:05,124 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4356390977443609 [2022-12-13 20:34:05,124 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 5794 transitions. [2022-12-13 20:34:05,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 5794 transitions. [2022-12-13 20:34:05,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:34:05,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 5794 transitions. [2022-12-13 20:34:05,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 231.76) internal successors, (5794), 25 states have internal predecessors, (5794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:34:05,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 532.0) internal successors, (13832), 26 states have internal predecessors, (13832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:34:05,143 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 532.0) internal successors, (13832), 26 states have internal predecessors, (13832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:34:05,144 INFO L175 Difference]: Start difference. First operand has 202 places, 237 transitions, 3519 flow. Second operand 25 states and 5794 transitions. [2022-12-13 20:34:05,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1075 transitions, 19486 flow [2022-12-13 20:34:16,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1075 transitions, 17197 flow, removed 912 selfloop flow, removed 4 redundant places. [2022-12-13 20:34:16,398 INFO L231 Difference]: Finished difference. Result has 223 places, 268 transitions, 3730 flow [2022-12-13 20:34:16,399 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=3191, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3730, PETRI_PLACES=223, PETRI_TRANSITIONS=268} [2022-12-13 20:34:16,399 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 169 predicate places. [2022-12-13 20:34:16,399 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 268 transitions, 3730 flow [2022-12-13 20:34:16,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 217.0) internal successors, (5208), 24 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:34:16,399 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:34:16,399 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:34:16,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-13 20:34:16,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:34:16,601 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:34:16,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:34:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash -770052401, now seen corresponding path program 3 times [2022-12-13 20:34:16,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:34:16,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529948736] [2022-12-13 20:34:16,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:34:16,603 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 20:34:16,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:34:16,606 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:34:16,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-13 20:34:16,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 20:34:16,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:34:16,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 20:34:16,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:34:16,844 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:34:16,844 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:34:16,894 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 20:34:16,894 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 20:34:16,954 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:34:16,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 20:34:16,972 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 20:34:16,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 20:34:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 20:34:17,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:34:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 20:34:18,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:34:18,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529948736] [2022-12-13 20:34:18,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529948736] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:34:18,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:34:18,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2022-12-13 20:34:18,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142937103] [2022-12-13 20:34:18,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:34:18,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 20:34:18,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:34:18,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 20:34:18,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:34:32,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 532 [2022-12-13 20:34:32,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 268 transitions, 3730 flow. Second operand has 13 states, 13 states have (on average 214.0) internal successors, (2782), 13 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:34:32,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:34:32,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 532 [2022-12-13 20:34:32,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:34:57,665 INFO L130 PetriNetUnfolder]: 64240/113074 cut-off events. [2022-12-13 20:34:57,666 INFO L131 PetriNetUnfolder]: For 855822/855822 co-relation queries the response was YES. [2022-12-13 20:34:58,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554805 conditions, 113074 events. 64240/113074 cut-off events. For 855822/855822 co-relation queries the response was YES. Maximal size of possible extension queue 3527. Compared 1125216 event pairs, 15624 based on Foata normal form. 8432/121506 useless extension candidates. Maximal degree in co-relation 554740. Up to 33773 conditions per place. [2022-12-13 20:34:58,950 INFO L137 encePairwiseOnDemand]: 527/532 looper letters, 554 selfloop transitions, 92 changer transitions 0/647 dead transitions. [2022-12-13 20:34:58,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 647 transitions, 8638 flow [2022-12-13 20:34:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:34:58,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 20:34:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2259 transitions. [2022-12-13 20:34:58,955 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42462406015037596 [2022-12-13 20:34:58,955 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2259 transitions. [2022-12-13 20:34:58,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2259 transitions. [2022-12-13 20:34:58,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:34:58,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2259 transitions. [2022-12-13 20:34:58,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 225.9) internal successors, (2259), 10 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:34:58,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 532.0) internal successors, (5852), 11 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:34:58,960 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 532.0) internal successors, (5852), 11 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:34:58,960 INFO L175 Difference]: Start difference. First operand has 223 places, 268 transitions, 3730 flow. Second operand 10 states and 2259 transitions. [2022-12-13 20:34:58,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 647 transitions, 8638 flow [2022-12-13 20:35:23,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 647 transitions, 8087 flow, removed 152 selfloop flow, removed 22 redundant places. [2022-12-13 20:35:23,890 INFO L231 Difference]: Finished difference. Result has 212 places, 268 transitions, 3347 flow [2022-12-13 20:35:23,890 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3347, PETRI_PLACES=212, PETRI_TRANSITIONS=268} [2022-12-13 20:35:23,891 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 158 predicate places. [2022-12-13 20:35:23,891 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 268 transitions, 3347 flow [2022-12-13 20:35:23,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 214.0) internal successors, (2782), 13 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:35:23,891 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:35:23,891 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:35:23,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-13 20:35:24,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:35:24,093 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:35:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:35:24,094 INFO L85 PathProgramCache]: Analyzing trace with hash 100755891, now seen corresponding path program 1 times [2022-12-13 20:35:24,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:35:24,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213535067] [2022-12-13 20:35:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:35:24,095 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 20:35:24,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:35:24,098 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:35:24,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-13 20:35:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:35:24,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 20:35:24,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:35:24,463 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 20:35:24,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:35:24,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:35:24,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213535067] [2022-12-13 20:35:24,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213535067] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:35:24,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:35:24,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:35:24,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742357397] [2022-12-13 20:35:24,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:35:24,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:35:24,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:35:24,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:35:24,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:35:24,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 532 [2022-12-13 20:35:24,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 268 transitions, 3347 flow. Second operand has 4 states, 4 states have (on average 225.25) internal successors, (901), 4 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:35:24,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:35:24,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 532 [2022-12-13 20:35:24,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:35:48,737 INFO L130 PetriNetUnfolder]: 65444/118224 cut-off events. [2022-12-13 20:35:48,737 INFO L131 PetriNetUnfolder]: For 789473/789473 co-relation queries the response was YES. [2022-12-13 20:35:49,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544492 conditions, 118224 events. 65444/118224 cut-off events. For 789473/789473 co-relation queries the response was YES. Maximal size of possible extension queue 3625. Compared 1221341 event pairs, 52708 based on Foata normal form. 260/118476 useless extension candidates. Maximal degree in co-relation 544436. Up to 109949 conditions per place. [2022-12-13 20:35:49,962 INFO L137 encePairwiseOnDemand]: 528/532 looper letters, 290 selfloop transitions, 1 changer transitions 7/299 dead transitions. [2022-12-13 20:35:49,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 299 transitions, 4272 flow [2022-12-13 20:35:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:35:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:35:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 937 transitions. [2022-12-13 20:35:49,965 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44031954887218044 [2022-12-13 20:35:49,965 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 937 transitions. [2022-12-13 20:35:49,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 937 transitions. [2022-12-13 20:35:49,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:35:49,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 937 transitions. [2022-12-13 20:35:49,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.25) internal successors, (937), 4 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:35:49,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:35:49,969 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:35:49,969 INFO L175 Difference]: Start difference. First operand has 212 places, 268 transitions, 3347 flow. Second operand 4 states and 937 transitions. [2022-12-13 20:35:49,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 299 transitions, 4272 flow [2022-12-13 20:35:58,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 299 transitions, 4064 flow, removed 18 selfloop flow, removed 7 redundant places. [2022-12-13 20:35:58,597 INFO L231 Difference]: Finished difference. Result has 210 places, 268 transitions, 3209 flow [2022-12-13 20:35:58,597 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=3172, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3209, PETRI_PLACES=210, PETRI_TRANSITIONS=268} [2022-12-13 20:35:58,598 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 156 predicate places. [2022-12-13 20:35:58,598 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 268 transitions, 3209 flow [2022-12-13 20:35:58,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.25) internal successors, (901), 4 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:35:58,598 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:35:58,598 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:35:58,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-13 20:35:58,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:35:58,799 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:35:58,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:35:58,800 INFO L85 PathProgramCache]: Analyzing trace with hash -446095365, now seen corresponding path program 3 times [2022-12-13 20:35:58,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:35:58,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719475433] [2022-12-13 20:35:58,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:35:58,802 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 20:35:58,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:35:58,804 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:35:58,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-13 20:35:58,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 20:35:58,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:35:58,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 20:35:58,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:35:59,013 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:35:59,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:35:59,078 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 20:35:59,078 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 20:35:59,216 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 20:35:59,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-12-13 20:35:59,242 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 20:35:59,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 20:35:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:35:59,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:36:03,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:36:03,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719475433] [2022-12-13 20:36:03,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719475433] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:03,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:36:03,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 20:36:03,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871645728] [2022-12-13 20:36:03,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:03,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 20:36:03,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:36:03,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 20:36:03,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-12-13 20:36:15,614 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 20:36:19,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:36:22,952 WARN L539 Checker$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 20:36:29,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:36:31,596 WARN L539 Checker$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 20:37:02,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 532 [2022-12-13 20:37:02,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 268 transitions, 3209 flow. Second operand has 16 states, 16 states have (on average 196.5) internal successors, (3144), 16 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:37:02,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:37:02,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 532 [2022-12-13 20:37:02,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:37:11,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:37:36,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:38:01,445 INFO L130 PetriNetUnfolder]: 75134/132739 cut-off events. [2022-12-13 20:38:01,445 INFO L131 PetriNetUnfolder]: For 853946/853946 co-relation queries the response was YES. [2022-12-13 20:38:02,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595634 conditions, 132739 events. 75134/132739 cut-off events. For 853946/853946 co-relation queries the response was YES. Maximal size of possible extension queue 3844. Compared 1338260 event pairs, 27935 based on Foata normal form. 338/133077 useless extension candidates. Maximal degree in co-relation 595578. Up to 37802 conditions per place. [2022-12-13 20:38:02,724 INFO L137 encePairwiseOnDemand]: 516/532 looper letters, 646 selfloop transitions, 186 changer transitions 0/832 dead transitions. [2022-12-13 20:38:02,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 832 transitions, 10909 flow [2022-12-13 20:38:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 20:38:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 20:38:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 5201 transitions. [2022-12-13 20:38:02,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3910526315789474 [2022-12-13 20:38:02,733 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 5201 transitions. [2022-12-13 20:38:02,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 5201 transitions. [2022-12-13 20:38:02,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:38:02,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 5201 transitions. [2022-12-13 20:38:02,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 208.04) internal successors, (5201), 25 states have internal predecessors, (5201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:38:02,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 532.0) internal successors, (13832), 26 states have internal predecessors, (13832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:38:02,749 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 532.0) internal successors, (13832), 26 states have internal predecessors, (13832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:38:02,750 INFO L175 Difference]: Start difference. First operand has 210 places, 268 transitions, 3209 flow. Second operand 25 states and 5201 transitions. [2022-12-13 20:38:02,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 832 transitions, 10909 flow [2022-12-13 20:38:12,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 832 transitions, 10869 flow, removed 16 selfloop flow, removed 2 redundant places. [2022-12-13 20:38:12,340 INFO L231 Difference]: Finished difference. Result has 240 places, 367 transitions, 5033 flow [2022-12-13 20:38:12,340 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=3206, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5033, PETRI_PLACES=240, PETRI_TRANSITIONS=367} [2022-12-13 20:38:12,340 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 186 predicate places. [2022-12-13 20:38:12,340 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 367 transitions, 5033 flow [2022-12-13 20:38:12,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 196.5) internal successors, (3144), 16 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:38:12,341 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:38:12,341 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:38:12,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-13 20:38:12,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:38:12,543 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:38:12,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:38:12,544 INFO L85 PathProgramCache]: Analyzing trace with hash -896282217, now seen corresponding path program 2 times [2022-12-13 20:38:12,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:38:12,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101185089] [2022-12-13 20:38:12,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:38:12,546 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 20:38:12,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:38:12,549 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:38:12,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-13 20:38:12,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 20:38:12,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:38:12,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 20:38:12,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:38:12,858 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 20:38:12,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:38:12,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:38:12,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101185089] [2022-12-13 20:38:12,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101185089] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:38:12,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:38:12,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:38:12,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460561562] [2022-12-13 20:38:12,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:38:12,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:38:12,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:38:12,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:38:12,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:38:13,036 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 532 [2022-12-13 20:38:13,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 367 transitions, 5033 flow. Second operand has 4 states, 4 states have (on average 225.25) internal successors, (901), 4 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:38:13,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:38:13,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 532 [2022-12-13 20:38:13,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:38:40,004 INFO L130 PetriNetUnfolder]: 69642/128458 cut-off events. [2022-12-13 20:38:40,004 INFO L131 PetriNetUnfolder]: For 904642/905058 co-relation queries the response was YES. [2022-12-13 20:38:40,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608839 conditions, 128458 events. 69642/128458 cut-off events. For 904642/905058 co-relation queries the response was YES. Maximal size of possible extension queue 4007. Compared 1372376 event pairs, 57257 based on Foata normal form. 169/128571 useless extension candidates. Maximal degree in co-relation 608774. Up to 118970 conditions per place. [2022-12-13 20:38:41,349 INFO L137 encePairwiseOnDemand]: 528/532 looper letters, 452 selfloop transitions, 1 changer transitions 5/460 dead transitions. [2022-12-13 20:38:41,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 460 transitions, 7051 flow [2022-12-13 20:38:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:38:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:38:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 939 transitions. [2022-12-13 20:38:41,352 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44125939849624063 [2022-12-13 20:38:41,352 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 939 transitions. [2022-12-13 20:38:41,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 939 transitions. [2022-12-13 20:38:41,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:38:41,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 939 transitions. [2022-12-13 20:38:41,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.75) internal successors, (939), 4 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:38:41,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:38:41,355 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:38:41,355 INFO L175 Difference]: Start difference. First operand has 240 places, 367 transitions, 5033 flow. Second operand 4 states and 939 transitions. [2022-12-13 20:38:41,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 460 transitions, 7051 flow [2022-12-13 20:38:53,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 460 transitions, 6981 flow, removed 23 selfloop flow, removed 3 redundant places. [2022-12-13 20:38:53,816 INFO L231 Difference]: Finished difference. Result has 242 places, 367 transitions, 5002 flow [2022-12-13 20:38:53,816 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=4969, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5002, PETRI_PLACES=242, PETRI_TRANSITIONS=367} [2022-12-13 20:38:53,816 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 188 predicate places. [2022-12-13 20:38:53,816 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 367 transitions, 5002 flow [2022-12-13 20:38:53,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.25) internal successors, (901), 4 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:38:53,817 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:38:53,817 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:38:53,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-12-13 20:38:54,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:38:54,019 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:38:54,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:38:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1796940174, now seen corresponding path program 1 times [2022-12-13 20:38:54,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:38:54,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87033421] [2022-12-13 20:38:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:38:54,021 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 20:38:54,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:38:54,024 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:38:54,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-13 20:38:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:54,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 20:38:54,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:38:54,251 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 20:38:54,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:38:54,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:38:54,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87033421] [2022-12-13 20:38:54,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87033421] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:38:54,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:38:54,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:38:54,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835610421] [2022-12-13 20:38:54,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:38:54,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:38:54,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:38:54,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:38:54,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:38:54,283 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 532 [2022-12-13 20:38:54,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 367 transitions, 5002 flow. Second operand has 3 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:38:54,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:38:54,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 532 [2022-12-13 20:38:54,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:39:17,139 INFO L130 PetriNetUnfolder]: 58770/107435 cut-off events. [2022-12-13 20:39:17,139 INFO L131 PetriNetUnfolder]: For 816217/816821 co-relation queries the response was YES. [2022-12-13 20:39:17,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525915 conditions, 107435 events. 58770/107435 cut-off events. For 816217/816821 co-relation queries the response was YES. Maximal size of possible extension queue 3353. Compared 1109690 event pairs, 31420 based on Foata normal form. 3134/110507 useless extension candidates. Maximal degree in co-relation 525847. Up to 103933 conditions per place. [2022-12-13 20:39:18,272 INFO L137 encePairwiseOnDemand]: 528/532 looper letters, 366 selfloop transitions, 28 changer transitions 4/400 dead transitions. [2022-12-13 20:39:18,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 400 transitions, 6214 flow [2022-12-13 20:39:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:39:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:39:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2022-12-13 20:39:18,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45363408521303256 [2022-12-13 20:39:18,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2022-12-13 20:39:18,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2022-12-13 20:39:18,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:39:18,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2022-12-13 20:39:18,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:39:18,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:39:18,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:39:18,277 INFO L175 Difference]: Start difference. First operand has 242 places, 367 transitions, 5002 flow. Second operand 3 states and 724 transitions. [2022-12-13 20:39:18,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 400 transitions, 6214 flow [2022-12-13 20:39:28,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 400 transitions, 6211 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 20:39:28,568 INFO L231 Difference]: Finished difference. Result has 242 places, 393 transitions, 5531 flow [2022-12-13 20:39:28,569 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=4999, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5531, PETRI_PLACES=242, PETRI_TRANSITIONS=393} [2022-12-13 20:39:28,569 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 188 predicate places. [2022-12-13 20:39:28,569 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 393 transitions, 5531 flow [2022-12-13 20:39:28,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:39:28,569 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:39:28,569 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 20:39:28,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-12-13 20:39:28,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:39:28,771 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:39:28,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:39:28,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1327714281, now seen corresponding path program 4 times [2022-12-13 20:39:28,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:39:28,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76244606] [2022-12-13 20:39:28,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:39:28,773 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 20:39:28,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:39:28,776 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:39:28,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-13 20:39:28,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:39:28,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:39:28,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 20:39:28,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:39:29,041 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:39:29,041 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:39:29,138 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 13 treesize of output 9 [2022-12-13 20:39:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 20:39:29,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:39:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 20:39:29,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:39:29,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76244606] [2022-12-13 20:39:29,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76244606] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:39:29,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:39:29,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 20:39:29,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218576689] [2022-12-13 20:39:29,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:39:29,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 20:39:29,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:39:29,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 20:39:29,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-12-13 20:39:37,317 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 532 [2022-12-13 20:39:37,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 393 transitions, 5531 flow. Second operand has 16 states, 16 states have (on average 212.625) internal successors, (3402), 16 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:39:37,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:39:37,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 532 [2022-12-13 20:39:37,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:40:09,883 INFO L130 PetriNetUnfolder]: 70509/129151 cut-off events. [2022-12-13 20:40:09,883 INFO L131 PetriNetUnfolder]: For 975054/975656 co-relation queries the response was YES. [2022-12-13 20:40:10,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632813 conditions, 129151 events. 70509/129151 cut-off events. For 975054/975656 co-relation queries the response was YES. Maximal size of possible extension queue 4037. Compared 1364508 event pairs, 49186 based on Foata normal form. 802/129859 useless extension candidates. Maximal degree in co-relation 632746. Up to 98801 conditions per place. [2022-12-13 20:40:11,452 INFO L137 encePairwiseOnDemand]: 523/532 looper letters, 556 selfloop transitions, 56 changer transitions 0/614 dead transitions. [2022-12-13 20:40:11,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 614 transitions, 9167 flow [2022-12-13 20:40:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 20:40:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 20:40:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2878 transitions. [2022-12-13 20:40:11,458 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4161364950838635 [2022-12-13 20:40:11,458 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2878 transitions. [2022-12-13 20:40:11,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2878 transitions. [2022-12-13 20:40:11,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:40:11,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2878 transitions. [2022-12-13 20:40:11,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 221.3846153846154) internal successors, (2878), 13 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:11,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 532.0) internal successors, (7448), 14 states have internal predecessors, (7448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:11,468 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 532.0) internal successors, (7448), 14 states have internal predecessors, (7448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:11,469 INFO L175 Difference]: Start difference. First operand has 242 places, 393 transitions, 5531 flow. Second operand 13 states and 2878 transitions. [2022-12-13 20:40:11,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 614 transitions, 9167 flow [2022-12-13 20:40:26,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 614 transitions, 9015 flow, removed 76 selfloop flow, removed 2 redundant places. [2022-12-13 20:40:26,401 INFO L231 Difference]: Finished difference. Result has 255 places, 412 transitions, 5897 flow [2022-12-13 20:40:26,401 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=5419, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5897, PETRI_PLACES=255, PETRI_TRANSITIONS=412} [2022-12-13 20:40:26,401 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 201 predicate places. [2022-12-13 20:40:26,401 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 412 transitions, 5897 flow [2022-12-13 20:40:26,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 212.625) internal successors, (3402), 16 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:26,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:40:26,402 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:40:26,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-12-13 20:40:26,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:40:26,603 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:40:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:26,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1327715822, now seen corresponding path program 1 times [2022-12-13 20:40:26,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:40:26,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781223657] [2022-12-13 20:40:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:26,606 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 20:40:26,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:40:26,609 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:40:26,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-12-13 20:40:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:26,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 20:40:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:40:26,887 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 20:40:26,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:40:26,970 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 11 treesize of output 9 [2022-12-13 20:40:27,198 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 20:40:27,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:40:27,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781223657] [2022-12-13 20:40:27,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781223657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:40:27,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:40:27,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-12-13 20:40:27,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004563544] [2022-12-13 20:40:27,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:40:27,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 20:40:27,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:40:27,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 20:40:27,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:40:30,163 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 532 [2022-12-13 20:40:30,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 412 transitions, 5897 flow. Second operand has 12 states, 12 states have (on average 219.83333333333334) internal successors, (2638), 12 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:30,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:40:30,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 532 [2022-12-13 20:40:30,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:40:58,307 INFO L130 PetriNetUnfolder]: 65780/122184 cut-off events. [2022-12-13 20:40:58,308 INFO L131 PetriNetUnfolder]: For 1059072/1059072 co-relation queries the response was YES. [2022-12-13 20:40:59,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 603152 conditions, 122184 events. 65780/122184 cut-off events. For 1059072/1059072 co-relation queries the response was YES. Maximal size of possible extension queue 3769. Compared 1287757 event pairs, 9614 based on Foata normal form. 3264/125400 useless extension candidates. Maximal degree in co-relation 603080. Up to 27211 conditions per place. [2022-12-13 20:40:59,667 INFO L137 encePairwiseOnDemand]: 525/532 looper letters, 528 selfloop transitions, 148 changer transitions 0/678 dead transitions. [2022-12-13 20:40:59,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 678 transitions, 10417 flow [2022-12-13 20:40:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:40:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 20:40:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2550 transitions. [2022-12-13 20:40:59,671 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43574846206425155 [2022-12-13 20:40:59,671 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2550 transitions. [2022-12-13 20:40:59,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2550 transitions. [2022-12-13 20:40:59,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:40:59,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2550 transitions. [2022-12-13 20:40:59,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 231.8181818181818) internal successors, (2550), 11 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:59,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 532.0) internal successors, (6384), 12 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:59,677 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 532.0) internal successors, (6384), 12 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:59,677 INFO L175 Difference]: Start difference. First operand has 255 places, 412 transitions, 5897 flow. Second operand 11 states and 2550 transitions. [2022-12-13 20:40:59,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 678 transitions, 10417 flow [2022-12-13 20:41:15,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 678 transitions, 10044 flow, removed 136 selfloop flow, removed 6 redundant places. [2022-12-13 20:41:15,865 INFO L231 Difference]: Finished difference. Result has 257 places, 395 transitions, 5792 flow [2022-12-13 20:41:15,866 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=5470, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5792, PETRI_PLACES=257, PETRI_TRANSITIONS=395} [2022-12-13 20:41:15,866 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 203 predicate places. [2022-12-13 20:41:15,866 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 395 transitions, 5792 flow [2022-12-13 20:41:15,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 219.83333333333334) internal successors, (2638), 12 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:41:15,866 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:15,866 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:41:15,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-12-13 20:41:16,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:41:16,068 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-12-13 20:41:16,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:16,069 INFO L85 PathProgramCache]: Analyzing trace with hash -449285898, now seen corresponding path program 1 times [2022-12-13 20:41:16,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:41:16,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542005370] [2022-12-13 20:41:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:16,071 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 20:41:16,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:41:16,073 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -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 20:41:16,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cd8ee3-9444-4a10-97fe-d2012e9a2923/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-13 20:41:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:16,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 20:41:16,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:41:16,698 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 20:41:16,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:41:16,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:41:16,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542005370] [2022-12-13 20:41:16,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542005370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:16,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:16,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:41:16,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464210475] [2022-12-13 20:41:16,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:16,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:41:16,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:41:16,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:41:16,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:41:19,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:41:19,854 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 532 [2022-12-13 20:41:19,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 395 transitions, 5792 flow. Second operand has 9 states, 9 states have (on average 209.66666666666666) internal successors, (1887), 9 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:41:19,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:19,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 532 [2022-12-13 20:41:19,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand