./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/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_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/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_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:12:05,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:12:05,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:12:05,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:12:05,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:12:05,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:12:05,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:12:05,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:12:05,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:12:05,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:12:05,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:12:05,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:12:05,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:12:05,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:12:05,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:12:05,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:12:05,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:12:05,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:12:05,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:12:05,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:12:05,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:12:05,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:12:05,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:12:05,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:12:05,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:12:05,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:12:05,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:12:05,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:12:05,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:12:05,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:12:05,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:12:05,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:12:05,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:12:05,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:12:05,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:12:05,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:12:05,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:12:05,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:12:05,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:12:05,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:12:05,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:12:05,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 18:12:05,944 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:12:05,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:12:05,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:12:05,945 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:12:05,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:12:05,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:12:05,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:12:05,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:12:05,946 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:12:05,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:12:05,946 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:12:05,947 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:12:05,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:12:05,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:12:05,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:12:05,947 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:12:05,947 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:12:05,947 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:12:05,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:12:05,947 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:12:05,948 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:12:05,948 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:12:05,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:12:05,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:12:05,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:12:05,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:12:05,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:12:05,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:12:05,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:12:05,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:12:05,949 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:12:05,949 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:12:05,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:12:05,949 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:12:05,949 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_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e [2022-12-13 18:12:06,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:12:06,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:12:06,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:12:06,140 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:12:06,140 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:12:06,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-12-13 18:12:08,655 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:12:08,806 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:12:08,806 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-12-13 18:12:08,811 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/data/1ba19fa6c/ff6baf88b25e47a4ad1dbe68637fbb4d/FLAG4bb1456da [2022-12-13 18:12:09,229 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/data/1ba19fa6c/ff6baf88b25e47a4ad1dbe68637fbb4d [2022-12-13 18:12:09,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:12:09,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:12:09,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:12:09,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:12:09,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:12:09,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:12:09" (1/1) ... [2022-12-13 18:12:09,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cafbec2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:09, skipping insertion in model container [2022-12-13 18:12:09,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:12:09" (1/1) ... [2022-12-13 18:12:09,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:12:09,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:12:09,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:09,359 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:09,359 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:09,359 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:09,362 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:09,362 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:09,363 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:09,363 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:09,367 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_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-12-13 18:12:09,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:12:09,383 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-13 18:12:09,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a1ec885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:09, skipping insertion in model container [2022-12-13 18:12:09,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:12:09,384 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 18:12:09,385 INFO L158 Benchmark]: Toolchain (without parser) took 152.15ms. Allocated memory is still 109.1MB. Free memory was 75.8MB in the beginning and 65.5MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 18:12:09,386 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 109.1MB. Free memory is still 82.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 18:12:09,386 INFO L158 Benchmark]: CACSL2BoogieTranslator took 150.57ms. Allocated memory is still 109.1MB. Free memory was 75.8MB in the beginning and 65.8MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 18:12:09,387 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 109.1MB. Free memory is still 82.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 150.57ms. Allocated memory is still 109.1MB. Free memory was 75.8MB in the beginning and 65.8MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 96]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/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_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/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_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:12:10,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:12:10,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:12:10,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:12:10,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:12:10,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:12:10,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:12:10,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:12:10,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:12:10,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:12:10,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:12:10,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:12:10,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:12:10,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:12:10,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:12:10,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:12:10,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:12:10,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:12:10,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:12:10,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:12:10,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:12:10,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:12:10,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:12:10,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:12:10,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:12:10,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:12:10,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:12:10,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:12:10,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:12:10,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:12:10,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:12:10,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:12:10,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:12:10,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:12:10,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:12:10,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:12:10,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:12:10,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:12:10,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:12:10,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:12:10,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:12:10,761 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 18:12:10,785 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:12:10,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:12:10,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:12:10,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:12:10,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:12:10,787 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:12:10,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:12:10,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:12:10,788 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:12:10,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:12:10,788 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:12:10,788 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:12:10,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:12:10,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:12:10,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:12:10,789 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:12:10,789 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:12:10,789 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:12:10,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:12:10,789 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:12:10,790 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 18:12:10,790 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 18:12:10,790 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:12:10,790 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:12:10,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:12:10,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:12:10,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:12:10,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:12:10,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:12:10,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:12:10,791 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 18:12:10,791 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 18:12:10,791 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:12:10,791 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:12:10,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:12:10,792 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 18:12:10,792 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:12:10,792 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_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e [2022-12-13 18:12:11,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:12:11,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:12:11,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:12:11,047 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:12:11,047 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:12:11,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-12-13 18:12:13,599 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:12:13,740 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:12:13,741 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-12-13 18:12:13,746 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/data/2e885c3da/29a7e7e8fab74139806ad6e847c2093e/FLAG5acd8eb3d [2022-12-13 18:12:13,760 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/data/2e885c3da/29a7e7e8fab74139806ad6e847c2093e [2022-12-13 18:12:13,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:12:13,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:12:13,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:12:13,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:12:13,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:12:13,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:12:13" (1/1) ... [2022-12-13 18:12:13,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eabbb50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:13, skipping insertion in model container [2022-12-13 18:12:13,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:12:13" (1/1) ... [2022-12-13 18:12:13,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:12:13,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:12:13,947 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:13,949 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:13,949 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:13,949 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:13,952 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:13,953 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:13,953 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:13,953 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:13,957 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_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-12-13 18:12:13,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:12:13,978 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 18:12:13,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:12:13,985 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:13,985 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:13,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:13,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:13,987 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:13,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:13,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:13,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:13,990 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_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-12-13 18:12:13,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:12:13,998 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:12:14,009 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:14,010 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:14,010 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:14,010 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:14,011 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:14,012 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:14,012 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:12:14,012 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:12:14,014 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_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-12-13 18:12:14,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:12:14,031 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:12:14,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:14 WrapperNode [2022-12-13 18:12:14,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:12:14,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:12:14,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:12:14,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:12:14,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:14" (1/1) ... [2022-12-13 18:12:14,046 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:14" (1/1) ... [2022-12-13 18:12:14,064 INFO L138 Inliner]: procedures = 28, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 140 [2022-12-13 18:12:14,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:12:14,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:12:14,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:12:14,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:12:14,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:14" (1/1) ... [2022-12-13 18:12:14,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:14" (1/1) ... [2022-12-13 18:12:14,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:14" (1/1) ... [2022-12-13 18:12:14,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:14" (1/1) ... [2022-12-13 18:12:14,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:14" (1/1) ... [2022-12-13 18:12:14,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:14" (1/1) ... [2022-12-13 18:12:14,085 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:14" (1/1) ... [2022-12-13 18:12:14,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:14" (1/1) ... [2022-12-13 18:12:14,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:12:14,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:12:14,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:12:14,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:12:14,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:14" (1/1) ... [2022-12-13 18:12:14,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:12:14,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:12:14,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:12:14,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:12:14,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:12:14,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 18:12:14,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:12:14,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 18:12:14,143 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 18:12:14,143 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 18:12:14,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 18:12:14,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 18:12:14,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 18:12:14,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 18:12:14,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 18:12:14,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:12:14,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:12:14,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:12:14,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 18:12:14,146 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 18:12:14,227 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:12:14,229 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:12:14,534 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:12:14,682 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:12:14,683 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 18:12:14,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:12:14 BoogieIcfgContainer [2022-12-13 18:12:14,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:12:14,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:12:14,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:12:14,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:12:14,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:12:13" (1/3) ... [2022-12-13 18:12:14,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0121c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:12:14, skipping insertion in model container [2022-12-13 18:12:14,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:12:14" (2/3) ... [2022-12-13 18:12:14,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0121c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:12:14, skipping insertion in model container [2022-12-13 18:12:14,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:12:14" (3/3) ... [2022-12-13 18:12:14,695 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2022-12-13 18:12:14,718 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:12:14,718 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-12-13 18:12:14,719 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:12:14,777 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 18:12:14,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 135 transitions, 286 flow [2022-12-13 18:12:14,841 INFO L130 PetriNetUnfolder]: 9/133 cut-off events. [2022-12-13 18:12:14,842 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 18:12:14,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 133 events. 9/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 134 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2022-12-13 18:12:14,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 135 transitions, 286 flow [2022-12-13 18:12:14,849 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 128 transitions, 268 flow [2022-12-13 18:12:14,852 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:12:14,859 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 128 transitions, 268 flow [2022-12-13 18:12:14,861 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 128 transitions, 268 flow [2022-12-13 18:12:14,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 128 transitions, 268 flow [2022-12-13 18:12:14,882 INFO L130 PetriNetUnfolder]: 9/128 cut-off events. [2022-12-13 18:12:14,883 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 18:12:14,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 128 events. 9/128 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 133 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2022-12-13 18:12:14,884 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2022-12-13 18:12:28,152 INFO L134 LiptonReduction]: Checked pairs total: 1568 [2022-12-13 18:12:28,152 INFO L136 LiptonReduction]: Total number of compositions: 138 [2022-12-13 18:12:28,162 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:12:28,166 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;@f798ed9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:12:28,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-12-13 18:12:28,168 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 18:12:28,168 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:12:28,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:28,169 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:12:28,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:28,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:28,173 INFO L85 PathProgramCache]: Analyzing trace with hash 20250, now seen corresponding path program 1 times [2022-12-13 18:12:28,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:28,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907562864] [2022-12-13 18:12:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:28,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:28,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:28,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:28,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 18:12:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:28,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:12:28,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:28,320 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 18:12:28,320 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 18:12:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:28,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:12:28,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:28,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907562864] [2022-12-13 18:12:28,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907562864] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:12:28,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:12:28,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:12:28,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469559009] [2022-12-13 18:12:28,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:12:28,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:12:28,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:28,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:12:28,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:12:28,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2022-12-13 18:12:28,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:28,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:12:28,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2022-12-13 18:12:28,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:12:28,676 INFO L130 PetriNetUnfolder]: 429/628 cut-off events. [2022-12-13 18:12:28,676 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 18:12:28,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1275 conditions, 628 events. 429/628 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 2679 event pairs, 222 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 1124. Up to 622 conditions per place. [2022-12-13 18:12:28,682 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2022-12-13 18:12:28,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 136 flow [2022-12-13 18:12:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:12:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:12:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2022-12-13 18:12:28,692 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.463980463980464 [2022-12-13 18:12:28,692 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2022-12-13 18:12:28,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2022-12-13 18:12:28,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:12:28,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2022-12-13 18:12:28,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:28,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:28,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:28,703 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 380 transitions. [2022-12-13 18:12:28,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 136 flow [2022-12-13 18:12:28,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 18:12:28,707 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 70 flow [2022-12-13 18:12:28,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2022-12-13 18:12:28,711 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2022-12-13 18:12:28,711 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 70 flow [2022-12-13 18:12:28,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:28,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:28,711 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:12:28,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:12:28,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:28,913 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:28,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:28,914 INFO L85 PathProgramCache]: Analyzing trace with hash 20251, now seen corresponding path program 1 times [2022-12-13 18:12:28,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:28,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519475725] [2022-12-13 18:12:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:28,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:28,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:28,918 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:28,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 18:12:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:29,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:12:29,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:29,107 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:12:29,108 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 18:12:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:29,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:12:29,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:29,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519475725] [2022-12-13 18:12:29,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519475725] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:12:29,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:12:29,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:12:29,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846651088] [2022-12-13 18:12:29,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:12:29,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:12:29,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:12:29,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:12:29,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2022-12-13 18:12:29,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:29,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:12:29,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2022-12-13 18:12:29,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:12:29,560 INFO L130 PetriNetUnfolder]: 857/1254 cut-off events. [2022-12-13 18:12:29,560 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 18:12:29,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2514 conditions, 1254 events. 857/1254 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 6178 event pairs, 444 based on Foata normal form. 0/446 useless extension candidates. Maximal degree in co-relation 2508. Up to 623 conditions per place. [2022-12-13 18:12:29,571 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 56 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2022-12-13 18:12:29,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 60 transitions, 246 flow [2022-12-13 18:12:29,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:12:29,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:12:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2022-12-13 18:12:29,574 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49694749694749696 [2022-12-13 18:12:29,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2022-12-13 18:12:29,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2022-12-13 18:12:29,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:12:29,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2022-12-13 18:12:29,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:29,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:29,577 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:29,577 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 407 transitions. [2022-12-13 18:12:29,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 60 transitions, 246 flow [2022-12-13 18:12:29,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:12:29,578 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 81 flow [2022-12-13 18:12:29,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2022-12-13 18:12:29,579 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2022-12-13 18:12:29,579 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 81 flow [2022-12-13 18:12:29,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:29,579 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:29,579 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:12:29,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 18:12:29,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:29,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:29,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:29,781 INFO L85 PathProgramCache]: Analyzing trace with hash 20368, now seen corresponding path program 1 times [2022-12-13 18:12:29,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:29,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796726210] [2022-12-13 18:12:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:29,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:29,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:29,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:29,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 18:12:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:29,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:12:29,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:29,855 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 18:12:29,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-12-13 18:12:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:29,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:12:29,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:29,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796726210] [2022-12-13 18:12:29,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796726210] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:12:29,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:12:29,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:12:29,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023368702] [2022-12-13 18:12:29,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:12:29,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:12:29,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:29,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:12:29,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:12:30,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2022-12-13 18:12:30,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:30,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:12:30,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2022-12-13 18:12:30,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:12:30,212 INFO L130 PetriNetUnfolder]: 651/974 cut-off events. [2022-12-13 18:12:30,212 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 18:12:30,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1960 conditions, 974 events. 651/974 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 4659 event pairs, 334 based on Foata normal form. 0/373 useless extension candidates. Maximal degree in co-relation 1952. Up to 962 conditions per place. [2022-12-13 18:12:30,220 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2022-12-13 18:12:30,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 135 flow [2022-12-13 18:12:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:12:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:12:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2022-12-13 18:12:30,222 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2022-12-13 18:12:30,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2022-12-13 18:12:30,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2022-12-13 18:12:30,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:12:30,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2022-12-13 18:12:30,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:30,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:30,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:30,225 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 81 flow. Second operand 3 states and 378 transitions. [2022-12-13 18:12:30,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 135 flow [2022-12-13 18:12:30,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:12:30,226 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 77 flow [2022-12-13 18:12:30,226 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2022-12-13 18:12:30,226 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2022-12-13 18:12:30,226 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 77 flow [2022-12-13 18:12:30,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:30,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:30,227 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:12:30,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 18:12:30,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:30,429 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:30,430 INFO L85 PathProgramCache]: Analyzing trace with hash 20370, now seen corresponding path program 1 times [2022-12-13 18:12:30,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:30,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869241681] [2022-12-13 18:12:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:30,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:30,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:30,435 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:30,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 18:12:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:30,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:12:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:30,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:12:30,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:12:30,659 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:12:30,659 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 18:12:30,669 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 18:12:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:30,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:12:30,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:30,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869241681] [2022-12-13 18:12:30,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869241681] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:12:30,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:12:30,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:12:30,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75735270] [2022-12-13 18:12:30,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:12:30,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:12:30,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:30,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:12:30,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:12:30,785 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2022-12-13 18:12:30,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:30,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:12:30,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2022-12-13 18:12:30,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:12:30,945 INFO L130 PetriNetUnfolder]: 445/694 cut-off events. [2022-12-13 18:12:30,945 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 18:12:30,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1400 conditions, 694 events. 445/694 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3262 event pairs, 224 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 1391. Up to 682 conditions per place. [2022-12-13 18:12:30,949 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 26 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2022-12-13 18:12:30,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 127 flow [2022-12-13 18:12:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:12:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:12:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2022-12-13 18:12:30,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4590964590964591 [2022-12-13 18:12:30,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2022-12-13 18:12:30,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2022-12-13 18:12:30,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:12:30,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2022-12-13 18:12:30,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:30,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:30,955 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:30,956 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 77 flow. Second operand 3 states and 376 transitions. [2022-12-13 18:12:30,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 127 flow [2022-12-13 18:12:30,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:12:30,957 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 74 flow [2022-12-13 18:12:30,957 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2022-12-13 18:12:30,958 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2022-12-13 18:12:30,958 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 74 flow [2022-12-13 18:12:30,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:30,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:30,958 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 18:12:30,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 18:12:31,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:31,159 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:31,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:31,160 INFO L85 PathProgramCache]: Analyzing trace with hash 631478, now seen corresponding path program 1 times [2022-12-13 18:12:31,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:31,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678798839] [2022-12-13 18:12:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:31,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:31,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:31,161 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:31,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 18:12:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:31,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:12:31,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:31,251 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:12:31,251 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 18:12:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:31,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:12:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:31,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:31,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678798839] [2022-12-13 18:12:31,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678798839] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:12:31,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:12:31,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 18:12:31,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421211184] [2022-12-13 18:12:31,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:12:31,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:12:31,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:31,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:12:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:12:32,057 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 273 [2022-12-13 18:12:32,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 74 flow. Second operand has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:32,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:12:32,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 273 [2022-12-13 18:12:32,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:12:32,477 INFO L130 PetriNetUnfolder]: 669/1044 cut-off events. [2022-12-13 18:12:32,477 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 18:12:32,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 1044 events. 669/1044 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5264 event pairs, 336 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 2095. Up to 342 conditions per place. [2022-12-13 18:12:32,480 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 71 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2022-12-13 18:12:32,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 80 transitions, 346 flow [2022-12-13 18:12:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:12:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:12:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 747 transitions. [2022-12-13 18:12:32,482 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2022-12-13 18:12:32,482 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 747 transitions. [2022-12-13 18:12:32,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 747 transitions. [2022-12-13 18:12:32,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:12:32,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 747 transitions. [2022-12-13 18:12:32,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.5) internal successors, (747), 6 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:32,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:32,486 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:32,486 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 74 flow. Second operand 6 states and 747 transitions. [2022-12-13 18:12:32,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 80 transitions, 346 flow [2022-12-13 18:12:32,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 80 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:12:32,487 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 127 flow [2022-12-13 18:12:32,487 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2022-12-13 18:12:32,488 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2022-12-13 18:12:32,488 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 127 flow [2022-12-13 18:12:32,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:32,488 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:32,488 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:12:32,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:12:32,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:32,690 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:32,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:32,691 INFO L85 PathProgramCache]: Analyzing trace with hash 19589669, now seen corresponding path program 1 times [2022-12-13 18:12:32,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:32,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924923459] [2022-12-13 18:12:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:32,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:32,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:32,696 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:32,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 18:12:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:32,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:12:32,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:32,801 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2022-12-13 18:12:32,801 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 29 [2022-12-13 18:12:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:32,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:12:32,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:32,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924923459] [2022-12-13 18:12:32,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924923459] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:12:32,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:12:32,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:12:32,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749296995] [2022-12-13 18:12:32,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:12:32,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:12:32,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:32,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:12:32,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:12:32,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 273 [2022-12-13 18:12:32,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:32,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:12:32,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 273 [2022-12-13 18:12:32,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:12:33,018 INFO L130 PetriNetUnfolder]: 618/957 cut-off events. [2022-12-13 18:12:33,018 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 18:12:33,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1957 conditions, 957 events. 618/957 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 4760 event pairs, 309 based on Foata normal form. 0/441 useless extension candidates. Maximal degree in co-relation 1942. Up to 939 conditions per place. [2022-12-13 18:12:33,021 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2022-12-13 18:12:33,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 183 flow [2022-12-13 18:12:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:12:33,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:12:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2022-12-13 18:12:33,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4456654456654457 [2022-12-13 18:12:33,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2022-12-13 18:12:33,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2022-12-13 18:12:33,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:12:33,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2022-12-13 18:12:33,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:33,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:33,026 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:33,026 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 127 flow. Second operand 3 states and 365 transitions. [2022-12-13 18:12:33,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 183 flow [2022-12-13 18:12:33,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 173 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 18:12:33,027 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 115 flow [2022-12-13 18:12:33,027 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2022-12-13 18:12:33,028 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2022-12-13 18:12:33,028 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 115 flow [2022-12-13 18:12:33,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:33,028 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:33,028 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:12:33,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-12-13 18:12:33,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:33,229 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:33,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:33,230 INFO L85 PathProgramCache]: Analyzing trace with hash 19589670, now seen corresponding path program 1 times [2022-12-13 18:12:33,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:33,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898849980] [2022-12-13 18:12:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:33,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:33,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:33,232 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:33,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 18:12:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:33,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:12:33,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:33,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:12:33,315 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-13 18:12:33,315 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 18:12:33,323 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 39 treesize of output 37 [2022-12-13 18:12:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:33,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:12:33,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:33,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898849980] [2022-12-13 18:12:33,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898849980] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:12:33,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:12:33,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:12:33,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268900718] [2022-12-13 18:12:33,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:12:33,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:12:33,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:33,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:12:33,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:12:33,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2022-12-13 18:12:33,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:33,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:12:33,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2022-12-13 18:12:33,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:12:33,555 INFO L130 PetriNetUnfolder]: 567/870 cut-off events. [2022-12-13 18:12:33,555 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-13 18:12:33,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1780 conditions, 870 events. 567/870 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 4233 event pairs, 282 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 1764. Up to 852 conditions per place. [2022-12-13 18:12:33,558 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-12-13 18:12:33,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 167 flow [2022-12-13 18:12:33,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:12:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:12:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2022-12-13 18:12:33,560 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4542124542124542 [2022-12-13 18:12:33,560 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2022-12-13 18:12:33,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2022-12-13 18:12:33,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:12:33,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2022-12-13 18:12:33,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:33,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:33,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:33,562 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 115 flow. Second operand 3 states and 372 transitions. [2022-12-13 18:12:33,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 167 flow [2022-12-13 18:12:33,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:12:33,563 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 112 flow [2022-12-13 18:12:33,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-12-13 18:12:33,563 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2022-12-13 18:12:33,563 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 112 flow [2022-12-13 18:12:33,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:33,564 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:33,564 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 18:12:33,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 18:12:33,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:33,764 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:33,765 INFO L85 PathProgramCache]: Analyzing trace with hash 607275770, now seen corresponding path program 1 times [2022-12-13 18:12:33,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:33,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871449013] [2022-12-13 18:12:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:33,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:33,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:33,766 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:33,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 18:12:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:33,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 18:12:33,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:33,848 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 18:12:33,848 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 18:12:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:33,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:12:33,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:33,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871449013] [2022-12-13 18:12:33,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871449013] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:12:33,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:12:33,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:12:33,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394766142] [2022-12-13 18:12:33,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:12:33,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:12:33,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:33,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:12:33,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:12:33,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 273 [2022-12-13 18:12:33,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:33,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:12:33,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 273 [2022-12-13 18:12:33,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:12:34,106 INFO L130 PetriNetUnfolder]: 378/603 cut-off events. [2022-12-13 18:12:34,106 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-13 18:12:34,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 603 events. 378/603 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2768 event pairs, 189 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 1230. Up to 581 conditions per place. [2022-12-13 18:12:34,108 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 22 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2022-12-13 18:12:34,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 28 transitions, 160 flow [2022-12-13 18:12:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:12:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:12:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2022-12-13 18:12:34,110 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43040293040293043 [2022-12-13 18:12:34,110 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2022-12-13 18:12:34,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2022-12-13 18:12:34,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:12:34,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2022-12-13 18:12:34,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:34,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:34,113 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:34,114 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 112 flow. Second operand 4 states and 470 transitions. [2022-12-13 18:12:34,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 28 transitions, 160 flow [2022-12-13 18:12:34,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 28 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:12:34,115 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 115 flow [2022-12-13 18:12:34,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2022-12-13 18:12:34,116 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2022-12-13 18:12:34,116 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 115 flow [2022-12-13 18:12:34,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:34,116 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:34,116 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 18:12:34,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:12:34,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:34,318 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:34,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:34,319 INFO L85 PathProgramCache]: Analyzing trace with hash 607275771, now seen corresponding path program 1 times [2022-12-13 18:12:34,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:34,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248627495] [2022-12-13 18:12:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:34,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:34,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:34,324 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:34,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 18:12:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:34,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 18:12:34,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:34,512 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:12:34,513 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 18:12:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:34,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:12:34,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:34,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248627495] [2022-12-13 18:12:34,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248627495] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:12:34,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:12:34,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:12:34,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881062076] [2022-12-13 18:12:34,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:12:34,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:12:34,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:34,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:12:34,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:12:34,810 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 273 [2022-12-13 18:12:34,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:34,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:12:34,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 273 [2022-12-13 18:12:34,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:12:35,054 INFO L130 PetriNetUnfolder]: 564/933 cut-off events. [2022-12-13 18:12:35,054 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 18:12:35,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1931 conditions, 933 events. 564/933 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4757 event pairs, 204 based on Foata normal form. 0/603 useless extension candidates. Maximal degree in co-relation 1913. Up to 548 conditions per place. [2022-12-13 18:12:35,057 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 35 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2022-12-13 18:12:35,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 228 flow [2022-12-13 18:12:35,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:12:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:12:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 591 transitions. [2022-12-13 18:12:35,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.432967032967033 [2022-12-13 18:12:35,059 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 591 transitions. [2022-12-13 18:12:35,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 591 transitions. [2022-12-13 18:12:35,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:12:35,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 591 transitions. [2022-12-13 18:12:35,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:35,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:35,061 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:35,061 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 115 flow. Second operand 5 states and 591 transitions. [2022-12-13 18:12:35,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 228 flow [2022-12-13 18:12:35,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 223 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:12:35,063 INFO L231 Difference]: Finished difference. Result has 43 places, 29 transitions, 130 flow [2022-12-13 18:12:35,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=43, PETRI_TRANSITIONS=29} [2022-12-13 18:12:35,063 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2022-12-13 18:12:35,063 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 29 transitions, 130 flow [2022-12-13 18:12:35,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:35,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:35,063 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 18:12:35,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 18:12:35,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:35,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:35,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1636163035, now seen corresponding path program 2 times [2022-12-13 18:12:35,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:35,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992264322] [2022-12-13 18:12:35,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:12:35,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:35,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:35,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:35,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 18:12:35,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:12:35,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:12:35,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 18:12:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:35,430 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:12:35,430 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 18:12:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:35,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:12:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:36,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:36,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992264322] [2022-12-13 18:12:36,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992264322] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:12:36,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:12:36,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:12:36,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246641513] [2022-12-13 18:12:36,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:12:36,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:12:36,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:36,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:12:36,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:12:38,676 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 273 [2022-12-13 18:12:38,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 29 transitions, 130 flow. Second operand has 12 states, 12 states have (on average 113.0) internal successors, (1356), 12 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:38,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:12:38,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 273 [2022-12-13 18:12:38,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:12:41,866 INFO L130 PetriNetUnfolder]: 1642/2754 cut-off events. [2022-12-13 18:12:41,866 INFO L131 PetriNetUnfolder]: For 282/381 co-relation queries the response was YES. [2022-12-13 18:12:41,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6104 conditions, 2754 events. 1642/2754 cut-off events. For 282/381 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16924 event pairs, 1040 based on Foata normal form. 105/1968 useless extension candidates. Maximal degree in co-relation 6085. Up to 351 conditions per place. [2022-12-13 18:12:41,874 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 182 selfloop transitions, 12 changer transitions 0/196 dead transitions. [2022-12-13 18:12:41,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 196 transitions, 1031 flow [2022-12-13 18:12:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:12:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 18:12:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1534 transitions. [2022-12-13 18:12:41,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2022-12-13 18:12:41,877 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1534 transitions. [2022-12-13 18:12:41,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1534 transitions. [2022-12-13 18:12:41,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:12:41,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1534 transitions. [2022-12-13 18:12:41,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 127.83333333333333) internal successors, (1534), 12 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:41,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 273.0) internal successors, (3549), 13 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:41,882 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 273.0) internal successors, (3549), 13 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:41,883 INFO L175 Difference]: Start difference. First operand has 43 places, 29 transitions, 130 flow. Second operand 12 states and 1534 transitions. [2022-12-13 18:12:41,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 196 transitions, 1031 flow [2022-12-13 18:12:41,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 196 transitions, 996 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 18:12:41,885 INFO L231 Difference]: Finished difference. Result has 58 places, 36 transitions, 219 flow [2022-12-13 18:12:41,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=219, PETRI_PLACES=58, PETRI_TRANSITIONS=36} [2022-12-13 18:12:41,885 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2022-12-13 18:12:41,886 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 36 transitions, 219 flow [2022-12-13 18:12:41,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 113.0) internal successors, (1356), 12 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:41,886 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:41,886 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:12:41,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 18:12:42,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:42,087 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:42,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:42,088 INFO L85 PathProgramCache]: Analyzing trace with hash -519291526, now seen corresponding path program 1 times [2022-12-13 18:12:42,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:42,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477899131] [2022-12-13 18:12:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:42,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:42,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:42,089 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:42,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 18:12:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:42,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 18:12:42,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:42,203 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:12:42,203 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 18:12:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:42,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:12:42,281 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:42,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477899131] [2022-12-13 18:12:42,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477899131] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:12:42,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:12:42,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:12:42,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887819584] [2022-12-13 18:12:42,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:12:42,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:12:42,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:42,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:12:42,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:12:42,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 273 [2022-12-13 18:12:42,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 36 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:42,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:12:42,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 273 [2022-12-13 18:12:42,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:12:43,090 INFO L130 PetriNetUnfolder]: 2152/3844 cut-off events. [2022-12-13 18:12:43,090 INFO L131 PetriNetUnfolder]: For 572/732 co-relation queries the response was YES. [2022-12-13 18:12:43,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8421 conditions, 3844 events. 2152/3844 cut-off events. For 572/732 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25530 event pairs, 1100 based on Foata normal form. 160/3094 useless extension candidates. Maximal degree in co-relation 8395. Up to 2491 conditions per place. [2022-12-13 18:12:43,101 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 41 selfloop transitions, 7 changer transitions 0/49 dead transitions. [2022-12-13 18:12:43,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 49 transitions, 349 flow [2022-12-13 18:12:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:12:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:12:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2022-12-13 18:12:43,103 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4315018315018315 [2022-12-13 18:12:43,103 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2022-12-13 18:12:43,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2022-12-13 18:12:43,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:12:43,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2022-12-13 18:12:43,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:43,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:43,105 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:43,105 INFO L175 Difference]: Start difference. First operand has 58 places, 36 transitions, 219 flow. Second operand 5 states and 589 transitions. [2022-12-13 18:12:43,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 49 transitions, 349 flow [2022-12-13 18:12:43,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 49 transitions, 324 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-12-13 18:12:43,107 INFO L231 Difference]: Finished difference. Result has 59 places, 37 transitions, 216 flow [2022-12-13 18:12:43,107 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=59, PETRI_TRANSITIONS=37} [2022-12-13 18:12:43,107 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2022-12-13 18:12:43,107 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 37 transitions, 216 flow [2022-12-13 18:12:43,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:43,108 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:43,108 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:12:43,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:12:43,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:43,309 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:43,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:43,310 INFO L85 PathProgramCache]: Analyzing trace with hash -523516981, now seen corresponding path program 1 times [2022-12-13 18:12:43,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:43,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554311871] [2022-12-13 18:12:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:43,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:43,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:43,314 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:43,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 18:12:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:43,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 18:12:43,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:43,419 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:12:43,420 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 18:12:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:43,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:12:43,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:43,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554311871] [2022-12-13 18:12:43,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554311871] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:12:43,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:12:43,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:12:43,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956659514] [2022-12-13 18:12:43,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:12:43,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:12:43,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:12:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:12:43,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 273 [2022-12-13 18:12:43,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 37 transitions, 216 flow. Second operand has 5 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:43,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:12:43,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 273 [2022-12-13 18:12:43,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:12:44,366 INFO L130 PetriNetUnfolder]: 1934/3475 cut-off events. [2022-12-13 18:12:44,366 INFO L131 PetriNetUnfolder]: For 774/941 co-relation queries the response was YES. [2022-12-13 18:12:44,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8445 conditions, 3475 events. 1934/3475 cut-off events. For 774/941 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22296 event pairs, 1594 based on Foata normal form. 167/2993 useless extension candidates. Maximal degree in co-relation 8417. Up to 3416 conditions per place. [2022-12-13 18:12:44,378 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 48 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2022-12-13 18:12:44,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 366 flow [2022-12-13 18:12:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:12:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:12:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 596 transitions. [2022-12-13 18:12:44,379 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43663003663003663 [2022-12-13 18:12:44,379 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 596 transitions. [2022-12-13 18:12:44,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 596 transitions. [2022-12-13 18:12:44,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:12:44,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 596 transitions. [2022-12-13 18:12:44,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.2) internal successors, (596), 5 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:44,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:44,382 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:44,382 INFO L175 Difference]: Start difference. First operand has 59 places, 37 transitions, 216 flow. Second operand 5 states and 596 transitions. [2022-12-13 18:12:44,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 366 flow [2022-12-13 18:12:44,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 53 transitions, 352 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 18:12:44,384 INFO L231 Difference]: Finished difference. Result has 63 places, 39 transitions, 239 flow [2022-12-13 18:12:44,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=63, PETRI_TRANSITIONS=39} [2022-12-13 18:12:44,384 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2022-12-13 18:12:44,385 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 39 transitions, 239 flow [2022-12-13 18:12:44,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:44,385 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:44,385 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:12:44,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 18:12:44,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:44,586 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:44,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:44,587 INFO L85 PathProgramCache]: Analyzing trace with hash 689797392, now seen corresponding path program 1 times [2022-12-13 18:12:44,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:44,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145655514] [2022-12-13 18:12:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:44,589 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:44,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:44,592 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:44,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 18:12:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:44,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:12:44,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:44,718 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:12:44,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 18:12:44,879 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 18:12:44,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:12:45,381 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 18:12:45,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:45,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145655514] [2022-12-13 18:12:45,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145655514] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:12:45,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:12:45,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:12:45,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135724048] [2022-12-13 18:12:45,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:12:45,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:12:45,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:45,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:12:45,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:12:47,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2022-12-13 18:12:47,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 39 transitions, 239 flow. Second operand has 12 states, 12 states have (on average 109.33333333333333) internal successors, (1312), 12 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:47,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:12:47,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2022-12-13 18:12:47,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:12:49,592 INFO L130 PetriNetUnfolder]: 4049/7201 cut-off events. [2022-12-13 18:12:49,592 INFO L131 PetriNetUnfolder]: For 3381/3731 co-relation queries the response was YES. [2022-12-13 18:12:49,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19156 conditions, 7201 events. 4049/7201 cut-off events. For 3381/3731 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 51434 event pairs, 437 based on Foata normal form. 844/8026 useless extension candidates. Maximal degree in co-relation 19125. Up to 1549 conditions per place. [2022-12-13 18:12:49,615 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 95 selfloop transitions, 18 changer transitions 0/114 dead transitions. [2022-12-13 18:12:49,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 114 transitions, 703 flow [2022-12-13 18:12:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:12:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 18:12:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1175 transitions. [2022-12-13 18:12:49,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43040293040293043 [2022-12-13 18:12:49,618 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1175 transitions. [2022-12-13 18:12:49,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1175 transitions. [2022-12-13 18:12:49,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:12:49,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1175 transitions. [2022-12-13 18:12:49,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 117.5) internal successors, (1175), 10 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:49,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:49,622 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:49,622 INFO L175 Difference]: Start difference. First operand has 63 places, 39 transitions, 239 flow. Second operand 10 states and 1175 transitions. [2022-12-13 18:12:49,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 114 transitions, 703 flow [2022-12-13 18:12:49,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 114 transitions, 693 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 18:12:49,625 INFO L231 Difference]: Finished difference. Result has 77 places, 47 transitions, 346 flow [2022-12-13 18:12:49,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=346, PETRI_PLACES=77, PETRI_TRANSITIONS=47} [2022-12-13 18:12:49,625 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2022-12-13 18:12:49,625 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 47 transitions, 346 flow [2022-12-13 18:12:49,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 109.33333333333333) internal successors, (1312), 12 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:49,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:49,626 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:12:49,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 18:12:49,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:49,827 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:49,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:49,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1236043687, now seen corresponding path program 1 times [2022-12-13 18:12:49,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:49,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185375072] [2022-12-13 18:12:49,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:12:49,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:49,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:49,830 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:49,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 18:12:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:12:49,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:12:49,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:50,000 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:12:50,000 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 18:12:50,132 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 18:12:50,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:12:50,610 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 18:12:50,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:50,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185375072] [2022-12-13 18:12:50,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185375072] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:12:50,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:12:50,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:12:50,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199525122] [2022-12-13 18:12:50,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:12:50,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:12:50,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:50,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:12:50,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:12:52,747 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2022-12-13 18:12:52,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 47 transitions, 346 flow. Second operand has 12 states, 12 states have (on average 109.66666666666667) internal successors, (1316), 12 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:52,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:12:52,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2022-12-13 18:12:52,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:12:55,878 INFO L130 PetriNetUnfolder]: 8954/15778 cut-off events. [2022-12-13 18:12:55,879 INFO L131 PetriNetUnfolder]: For 40146/41152 co-relation queries the response was YES. [2022-12-13 18:12:55,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57777 conditions, 15778 events. 8954/15778 cut-off events. For 40146/41152 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 121639 event pairs, 1218 based on Foata normal form. 2230/17989 useless extension candidates. Maximal degree in co-relation 57739. Up to 3997 conditions per place. [2022-12-13 18:12:55,945 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 132 selfloop transitions, 25 changer transitions 0/159 dead transitions. [2022-12-13 18:12:55,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 159 transitions, 1394 flow [2022-12-13 18:12:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:12:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 18:12:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1167 transitions. [2022-12-13 18:12:55,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42747252747252745 [2022-12-13 18:12:55,948 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1167 transitions. [2022-12-13 18:12:55,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1167 transitions. [2022-12-13 18:12:55,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:12:55,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1167 transitions. [2022-12-13 18:12:55,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 116.7) internal successors, (1167), 10 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 18:12:55,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:55,952 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:55,952 INFO L175 Difference]: Start difference. First operand has 77 places, 47 transitions, 346 flow. Second operand 10 states and 1167 transitions. [2022-12-13 18:12:55,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 159 transitions, 1394 flow [2022-12-13 18:12:55,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 159 transitions, 1302 flow, removed 38 selfloop flow, removed 3 redundant places. [2022-12-13 18:12:55,981 INFO L231 Difference]: Finished difference. Result has 90 places, 63 transitions, 561 flow [2022-12-13 18:12:55,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=561, PETRI_PLACES=90, PETRI_TRANSITIONS=63} [2022-12-13 18:12:55,982 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2022-12-13 18:12:55,982 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 63 transitions, 561 flow [2022-12-13 18:12:55,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 109.66666666666667) internal successors, (1316), 12 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:12:55,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:12:55,983 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 18:12:55,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 18:12:56,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:56,184 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:12:56,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:12:56,184 INFO L85 PathProgramCache]: Analyzing trace with hash -489218053, now seen corresponding path program 3 times [2022-12-13 18:12:56,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:12:56,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175097640] [2022-12-13 18:12:56,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:12:56,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:12:56,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:12:56,186 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:12:56,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 18:12:56,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 18:12:56,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:12:56,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 18:12:56,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:12:56,393 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:12:56,393 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 18:12:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:56,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:12:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:12:59,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:12:59,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175097640] [2022-12-13 18:12:59,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175097640] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:12:59,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:12:59,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 18:12:59,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418814155] [2022-12-13 18:12:59,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:12:59,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 18:12:59,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:12:59,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 18:12:59,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 18:13:10,407 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 273 [2022-12-13 18:13:10,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 63 transitions, 561 flow. Second operand has 24 states, 24 states have (on average 113.0) internal successors, (2712), 24 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:10,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:13:10,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 273 [2022-12-13 18:13:10,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:13:31,543 INFO L130 PetriNetUnfolder]: 19982/35274 cut-off events. [2022-12-13 18:13:31,543 INFO L131 PetriNetUnfolder]: For 180985/185496 co-relation queries the response was YES. [2022-12-13 18:13:31,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165475 conditions, 35274 events. 19982/35274 cut-off events. For 180985/185496 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 292023 event pairs, 14604 based on Foata normal form. 4292/39563 useless extension candidates. Maximal degree in co-relation 165430. Up to 8821 conditions per place. [2022-12-13 18:13:31,810 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 916 selfloop transitions, 24 changer transitions 0/943 dead transitions. [2022-12-13 18:13:31,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 943 transitions, 9868 flow [2022-12-13 18:13:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 18:13:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 18:13:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3094 transitions. [2022-12-13 18:13:31,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2022-12-13 18:13:31,816 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3094 transitions. [2022-12-13 18:13:31,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3094 transitions. [2022-12-13 18:13:31,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:13:31,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3094 transitions. [2022-12-13 18:13:31,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 128.91666666666666) internal successors, (3094), 24 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:31,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 273.0) internal successors, (6825), 25 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:31,827 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 273.0) internal successors, (6825), 25 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:31,827 INFO L175 Difference]: Start difference. First operand has 90 places, 63 transitions, 561 flow. Second operand 24 states and 3094 transitions. [2022-12-13 18:13:31,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 943 transitions, 9868 flow [2022-12-13 18:13:32,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 943 transitions, 9569 flow, removed 126 selfloop flow, removed 3 redundant places. [2022-12-13 18:13:32,069 INFO L231 Difference]: Finished difference. Result has 123 places, 76 transitions, 730 flow [2022-12-13 18:13:32,069 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=730, PETRI_PLACES=123, PETRI_TRANSITIONS=76} [2022-12-13 18:13:32,070 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2022-12-13 18:13:32,070 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 76 transitions, 730 flow [2022-12-13 18:13:32,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 113.0) internal successors, (2712), 24 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:32,071 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:32,071 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:13:32,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-12-13 18:13:32,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:13:32,272 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:13:32,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:32,273 INFO L85 PathProgramCache]: Analyzing trace with hash 995278227, now seen corresponding path program 1 times [2022-12-13 18:13:32,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:13:32,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093627228] [2022-12-13 18:13:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:32,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:13:32,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:13:32,277 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:13:32,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 18:13:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:32,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:13:32,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:13:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:13:32,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:13:32,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:13:32,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093627228] [2022-12-13 18:13:32,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093627228] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:32,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:32,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:13:32,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656164930] [2022-12-13 18:13:32,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:32,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:32,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:13:32,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:32,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:32,376 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 273 [2022-12-13 18:13:32,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 76 transitions, 730 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:32,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:13:32,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 273 [2022-12-13 18:13:32,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:13:37,848 INFO L130 PetriNetUnfolder]: 19982/35252 cut-off events. [2022-12-13 18:13:37,848 INFO L131 PetriNetUnfolder]: For 171911/176342 co-relation queries the response was YES. [2022-12-13 18:13:38,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162416 conditions, 35252 events. 19982/35252 cut-off events. For 171911/176342 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 289310 event pairs, 7065 based on Foata normal form. 4222/39431 useless extension candidates. Maximal degree in co-relation 162358. Up to 33370 conditions per place. [2022-12-13 18:13:38,146 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 82 selfloop transitions, 3 changer transitions 3/90 dead transitions. [2022-12-13 18:13:38,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 90 transitions, 1001 flow [2022-12-13 18:13:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:38,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:13:38,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2022-12-13 18:13:38,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2022-12-13 18:13:38,149 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2022-12-13 18:13:38,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2022-12-13 18:13:38,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:13:38,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2022-12-13 18:13:38,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:38,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:38,151 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:38,151 INFO L175 Difference]: Start difference. First operand has 123 places, 76 transitions, 730 flow. Second operand 3 states and 390 transitions. [2022-12-13 18:13:38,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 90 transitions, 1001 flow [2022-12-13 18:13:38,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 90 transitions, 953 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-12-13 18:13:38,434 INFO L231 Difference]: Finished difference. Result has 116 places, 76 transitions, 689 flow [2022-12-13 18:13:38,434 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=689, PETRI_PLACES=116, PETRI_TRANSITIONS=76} [2022-12-13 18:13:38,434 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 78 predicate places. [2022-12-13 18:13:38,434 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 76 transitions, 689 flow [2022-12-13 18:13:38,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:38,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:13:38,435 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 18:13:38,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 18:13:38,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:13:38,636 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:13:38,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:38,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1773036480, now seen corresponding path program 2 times [2022-12-13 18:13:38,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:13:38,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860270807] [2022-12-13 18:13:38,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:13:38,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:13:38,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:13:38,643 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:13:38,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 18:13:38,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:13:38,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:13:38,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 18:13:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:13:38,800 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:13:38,801 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 18:13:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:13:39,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:13:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:13:40,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:13:40,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860270807] [2022-12-13 18:13:40,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860270807] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:13:40,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:13:40,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2022-12-13 18:13:40,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983504837] [2022-12-13 18:13:40,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:13:40,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 18:13:40,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:13:40,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 18:13:40,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:13:47,864 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 273 [2022-12-13 18:13:47,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 76 transitions, 689 flow. Second operand has 18 states, 18 states have (on average 108.55555555555556) internal successors, (1954), 18 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:47,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:13:47,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 273 [2022-12-13 18:13:47,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:01,813 INFO L130 PetriNetUnfolder]: 20843/36946 cut-off events. [2022-12-13 18:14:01,813 INFO L131 PetriNetUnfolder]: For 178294/180678 co-relation queries the response was YES. [2022-12-13 18:14:01,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171573 conditions, 36946 events. 20843/36946 cut-off events. For 178294/180678 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 306680 event pairs, 9549 based on Foata normal form. 2485/39431 useless extension candidates. Maximal degree in co-relation 171513. Up to 23872 conditions per place. [2022-12-13 18:14:02,109 INFO L137 encePairwiseOnDemand]: 264/273 looper letters, 325 selfloop transitions, 56 changer transitions 0/382 dead transitions. [2022-12-13 18:14:02,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 382 transitions, 3729 flow [2022-12-13 18:14:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 18:14:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 18:14:02,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2445 transitions. [2022-12-13 18:14:02,115 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42647828362114076 [2022-12-13 18:14:02,115 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2445 transitions. [2022-12-13 18:14:02,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2445 transitions. [2022-12-13 18:14:02,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:14:02,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2445 transitions. [2022-12-13 18:14:02,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 116.42857142857143) internal successors, (2445), 21 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:02,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:02,122 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:02,123 INFO L175 Difference]: Start difference. First operand has 116 places, 76 transitions, 689 flow. Second operand 21 states and 2445 transitions. [2022-12-13 18:14:02,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 382 transitions, 3729 flow [2022-12-13 18:14:02,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 382 transitions, 3551 flow, removed 83 selfloop flow, removed 2 redundant places. [2022-12-13 18:14:02,578 INFO L231 Difference]: Finished difference. Result has 134 places, 115 transitions, 1187 flow [2022-12-13 18:14:02,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1187, PETRI_PLACES=134, PETRI_TRANSITIONS=115} [2022-12-13 18:14:02,579 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 96 predicate places. [2022-12-13 18:14:02,579 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 115 transitions, 1187 flow [2022-12-13 18:14:02,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.55555555555556) internal successors, (1954), 18 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:02,579 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:02,579 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:14:02,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 18:14:02,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:14:02,780 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:14:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1158195807, now seen corresponding path program 2 times [2022-12-13 18:14:02,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:14:02,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973214487] [2022-12-13 18:14:02,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:14:02,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:14:02,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:14:02,786 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:14:02,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 18:14:02,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:14:02,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:14:02,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 18:14:02,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:02,944 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:14:02,944 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 18:14:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:03,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:14:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:04,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:14:04,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973214487] [2022-12-13 18:14:04,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973214487] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:14:04,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:14:04,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2022-12-13 18:14:04,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885934382] [2022-12-13 18:14:04,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:14:04,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 18:14:04,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:14:04,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 18:14:04,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:14:11,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 273 [2022-12-13 18:14:11,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 115 transitions, 1187 flow. Second operand has 18 states, 18 states have (on average 108.77777777777777) internal successors, (1958), 18 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:11,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:11,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 273 [2022-12-13 18:14:11,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:25,158 INFO L130 PetriNetUnfolder]: 21327/38266 cut-off events. [2022-12-13 18:14:25,158 INFO L131 PetriNetUnfolder]: For 172353/174663 co-relation queries the response was YES. [2022-12-13 18:14:25,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177825 conditions, 38266 events. 21327/38266 cut-off events. For 172353/174663 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 326490 event pairs, 9946 based on Foata normal form. 2050/40310 useless extension candidates. Maximal degree in co-relation 177763. Up to 22720 conditions per place. [2022-12-13 18:14:25,444 INFO L137 encePairwiseOnDemand]: 264/273 looper letters, 346 selfloop transitions, 53 changer transitions 0/402 dead transitions. [2022-12-13 18:14:25,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 402 transitions, 4460 flow [2022-12-13 18:14:25,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 18:14:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 18:14:25,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2427 transitions. [2022-12-13 18:14:25,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42333856619570903 [2022-12-13 18:14:25,450 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2427 transitions. [2022-12-13 18:14:25,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2427 transitions. [2022-12-13 18:14:25,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:14:25,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2427 transitions. [2022-12-13 18:14:25,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 115.57142857142857) internal successors, (2427), 21 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:25,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:25,457 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:25,457 INFO L175 Difference]: Start difference. First operand has 134 places, 115 transitions, 1187 flow. Second operand 21 states and 2427 transitions. [2022-12-13 18:14:25,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 402 transitions, 4460 flow [2022-12-13 18:14:25,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 402 transitions, 4376 flow, removed 31 selfloop flow, removed 8 redundant places. [2022-12-13 18:14:25,913 INFO L231 Difference]: Finished difference. Result has 147 places, 143 transitions, 1525 flow [2022-12-13 18:14:25,913 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1525, PETRI_PLACES=147, PETRI_TRANSITIONS=143} [2022-12-13 18:14:25,914 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 109 predicate places. [2022-12-13 18:14:25,914 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 143 transitions, 1525 flow [2022-12-13 18:14:25,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.77777777777777) internal successors, (1958), 18 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:25,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:25,914 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:14:25,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 18:14:26,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:14:26,115 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:14:26,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:26,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1953438282, now seen corresponding path program 1 times [2022-12-13 18:14:26,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:14:26,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182272467] [2022-12-13 18:14:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:26,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:14:26,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:14:26,121 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:14:26,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 18:14:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:26,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:14:26,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:26,273 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 18:14:26,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:14:26,370 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 18:14:26,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:14:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182272467] [2022-12-13 18:14:26,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182272467] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:14:26,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:14:26,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 18:14:26,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525424273] [2022-12-13 18:14:26,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:14:26,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 18:14:26,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:14:26,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 18:14:26,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-12-13 18:14:26,513 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 273 [2022-12-13 18:14:26,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 143 transitions, 1525 flow. Second operand has 13 states, 13 states have (on average 114.46153846153847) internal successors, (1488), 13 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:26,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:26,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 273 [2022-12-13 18:14:26,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:32,519 INFO L130 PetriNetUnfolder]: 20330/35994 cut-off events. [2022-12-13 18:14:32,520 INFO L131 PetriNetUnfolder]: For 179539/179539 co-relation queries the response was YES. [2022-12-13 18:14:32,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179048 conditions, 35994 events. 20330/35994 cut-off events. For 179539/179539 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 294910 event pairs, 754 based on Foata normal form. 670/36664 useless extension candidates. Maximal degree in co-relation 178988. Up to 10994 conditions per place. [2022-12-13 18:14:32,792 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 174 selfloop transitions, 192 changer transitions 0/366 dead transitions. [2022-12-13 18:14:32,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 366 transitions, 4346 flow [2022-12-13 18:14:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 18:14:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 18:14:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1793 transitions. [2022-12-13 18:14:32,796 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43785103785103785 [2022-12-13 18:14:32,796 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1793 transitions. [2022-12-13 18:14:32,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1793 transitions. [2022-12-13 18:14:32,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:14:32,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1793 transitions. [2022-12-13 18:14:32,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 119.53333333333333) internal successors, (1793), 15 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:32,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:32,801 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:32,801 INFO L175 Difference]: Start difference. First operand has 147 places, 143 transitions, 1525 flow. Second operand 15 states and 1793 transitions. [2022-12-13 18:14:32,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 366 transitions, 4346 flow [2022-12-13 18:14:33,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 366 transitions, 4272 flow, removed 28 selfloop flow, removed 5 redundant places. [2022-12-13 18:14:33,548 INFO L231 Difference]: Finished difference. Result has 166 places, 280 transitions, 3706 flow [2022-12-13 18:14:33,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3706, PETRI_PLACES=166, PETRI_TRANSITIONS=280} [2022-12-13 18:14:33,549 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 128 predicate places. [2022-12-13 18:14:33,549 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 280 transitions, 3706 flow [2022-12-13 18:14:33,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 114.46153846153847) internal successors, (1488), 13 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:33,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:33,549 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:14:33,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 18:14:33,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:14:33,750 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:14:33,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:33,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1484574798, now seen corresponding path program 1 times [2022-12-13 18:14:33,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:14:33,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421411722] [2022-12-13 18:14:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:33,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:14:33,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:14:33,751 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:14:33,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 18:14:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:33,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:14:33,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:33,941 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 18:14:33,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:14:34,041 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 18:14:34,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:14:34,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421411722] [2022-12-13 18:14:34,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421411722] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:14:34,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:14:34,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 18:14:34,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833707139] [2022-12-13 18:14:34,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:14:34,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 18:14:34,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:14:34,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 18:14:34,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-12-13 18:14:34,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 273 [2022-12-13 18:14:34,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 280 transitions, 3706 flow. Second operand has 13 states, 13 states have (on average 114.3076923076923) internal successors, (1486), 13 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:34,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:34,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 273 [2022-12-13 18:14:34,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:41,431 INFO L130 PetriNetUnfolder]: 19688/34722 cut-off events. [2022-12-13 18:14:41,431 INFO L131 PetriNetUnfolder]: For 268328/268328 co-relation queries the response was YES. [2022-12-13 18:14:41,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214370 conditions, 34722 events. 19688/34722 cut-off events. For 268328/268328 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 278087 event pairs, 906 based on Foata normal form. 510/35232 useless extension candidates. Maximal degree in co-relation 214300. Up to 11744 conditions per place. [2022-12-13 18:14:41,727 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 274 selfloop transitions, 283 changer transitions 0/557 dead transitions. [2022-12-13 18:14:41,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 557 transitions, 8270 flow [2022-12-13 18:14:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 18:14:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 18:14:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1782 transitions. [2022-12-13 18:14:41,731 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4351648351648352 [2022-12-13 18:14:41,731 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1782 transitions. [2022-12-13 18:14:41,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1782 transitions. [2022-12-13 18:14:41,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:14:41,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1782 transitions. [2022-12-13 18:14:41,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 118.8) internal successors, (1782), 15 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:41,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:41,736 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:41,736 INFO L175 Difference]: Start difference. First operand has 166 places, 280 transitions, 3706 flow. Second operand 15 states and 1782 transitions. [2022-12-13 18:14:41,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 557 transitions, 8270 flow [2022-12-13 18:14:45,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 557 transitions, 7650 flow, removed 255 selfloop flow, removed 3 redundant places. [2022-12-13 18:14:45,588 INFO L231 Difference]: Finished difference. Result has 188 places, 442 transitions, 6487 flow [2022-12-13 18:14:45,588 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6487, PETRI_PLACES=188, PETRI_TRANSITIONS=442} [2022-12-13 18:14:45,588 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 150 predicate places. [2022-12-13 18:14:45,589 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 442 transitions, 6487 flow [2022-12-13 18:14:45,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 114.3076923076923) internal successors, (1486), 13 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:45,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:45,589 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1] [2022-12-13 18:14:45,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 18:14:45,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:14:45,790 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:14:45,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:45,791 INFO L85 PathProgramCache]: Analyzing trace with hash -12965973, now seen corresponding path program 3 times [2022-12-13 18:14:45,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:14:45,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066306665] [2022-12-13 18:14:45,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:14:45,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:14:45,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:14:45,795 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:14:45,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 18:14:46,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 18:14:46,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:14:46,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 18:14:46,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:46,122 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:14:46,122 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 18:14:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:14:46,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:14:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:14:46,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:14:46,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066306665] [2022-12-13 18:14:46,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066306665] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:14:46,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:14:46,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-12-13 18:14:46,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986852550] [2022-12-13 18:14:46,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:14:46,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 18:14:46,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:14:46,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 18:14:46,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-13 18:14:49,743 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 273 [2022-12-13 18:14:49,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 442 transitions, 6487 flow. Second operand has 16 states, 16 states have (on average 107.5625) internal successors, (1721), 16 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:14:49,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:49,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 273 [2022-12-13 18:14:49,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:00,431 INFO L130 PetriNetUnfolder]: 19924/35371 cut-off events. [2022-12-13 18:15:00,431 INFO L131 PetriNetUnfolder]: For 415614/417497 co-relation queries the response was YES. [2022-12-13 18:15:00,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243185 conditions, 35371 events. 19924/35371 cut-off events. For 415614/417497 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 288655 event pairs, 8639 based on Foata normal form. 1061/36219 useless extension candidates. Maximal degree in co-relation 243103. Up to 33365 conditions per place. [2022-12-13 18:15:00,760 INFO L137 encePairwiseOnDemand]: 266/273 looper letters, 590 selfloop transitions, 45 changer transitions 0/656 dead transitions. [2022-12-13 18:15:00,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 656 transitions, 10455 flow [2022-12-13 18:15:00,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 18:15:00,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 18:15:00,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1486 transitions. [2022-12-13 18:15:00,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41870949563257254 [2022-12-13 18:15:00,763 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1486 transitions. [2022-12-13 18:15:00,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1486 transitions. [2022-12-13 18:15:00,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:00,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1486 transitions. [2022-12-13 18:15:00,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 114.3076923076923) internal successors, (1486), 13 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:00,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:00,767 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:00,767 INFO L175 Difference]: Start difference. First operand has 188 places, 442 transitions, 6487 flow. Second operand 13 states and 1486 transitions. [2022-12-13 18:15:00,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 656 transitions, 10455 flow [2022-12-13 18:15:08,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 656 transitions, 9786 flow, removed 269 selfloop flow, removed 3 redundant places. [2022-12-13 18:15:08,637 INFO L231 Difference]: Finished difference. Result has 201 places, 469 transitions, 6646 flow [2022-12-13 18:15:08,637 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6020, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6646, PETRI_PLACES=201, PETRI_TRANSITIONS=469} [2022-12-13 18:15:08,638 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 163 predicate places. [2022-12-13 18:15:08,638 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 469 transitions, 6646 flow [2022-12-13 18:15:08,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 107.5625) internal successors, (1721), 16 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:08,638 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:08,638 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 18:15:08,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-12-13 18:15:08,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:15:08,839 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:15:08,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:08,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1870909573, now seen corresponding path program 4 times [2022-12-13 18:15:08,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:15:08,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469673878] [2022-12-13 18:15:08,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:15:08,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:15:08,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:15:08,845 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:15:08,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 18:15:08,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:15:08,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:08,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 18:15:08,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:09,027 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:15:09,027 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 18:15:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:15:09,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:15:10,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:15:10,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469673878] [2022-12-13 18:15:10,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469673878] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:10,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:15:10,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 18:15:10,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323572566] [2022-12-13 18:15:10,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:10,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 18:15:10,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:15:10,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 18:15:10,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:15:16,831 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2022-12-13 18:15:16,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 469 transitions, 6646 flow. Second operand has 18 states, 18 states have (on average 109.55555555555556) internal successors, (1972), 18 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:16,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:16,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2022-12-13 18:15:16,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:46,193 INFO L130 PetriNetUnfolder]: 46194/85401 cut-off events. [2022-12-13 18:15:46,193 INFO L131 PetriNetUnfolder]: For 791762/797092 co-relation queries the response was YES. [2022-12-13 18:15:46,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530999 conditions, 85401 events. 46194/85401 cut-off events. For 791762/797092 co-relation queries the response was YES. Maximal size of possible extension queue 1675. Compared 802175 event pairs, 10919 based on Foata normal form. 8174/93372 useless extension candidates. Maximal degree in co-relation 530912. Up to 19090 conditions per place. [2022-12-13 18:15:47,219 INFO L137 encePairwiseOnDemand]: 266/273 looper letters, 880 selfloop transitions, 228 changer transitions 0/1129 dead transitions. [2022-12-13 18:15:47,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 1129 transitions, 17681 flow [2022-12-13 18:15:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 18:15:47,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 18:15:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1789 transitions. [2022-12-13 18:15:47,223 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4368742368742369 [2022-12-13 18:15:47,223 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1789 transitions. [2022-12-13 18:15:47,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1789 transitions. [2022-12-13 18:15:47,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:47,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1789 transitions. [2022-12-13 18:15:47,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 119.26666666666667) internal successors, (1789), 15 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:47,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:47,230 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:15:47,230 INFO L175 Difference]: Start difference. First operand has 201 places, 469 transitions, 6646 flow. Second operand 15 states and 1789 transitions. [2022-12-13 18:15:47,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 1129 transitions, 17681 flow [2022-12-13 18:16:09,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 1129 transitions, 17652 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-12-13 18:16:09,249 INFO L231 Difference]: Finished difference. Result has 217 places, 560 transitions, 8614 flow [2022-12-13 18:16:09,250 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6617, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8614, PETRI_PLACES=217, PETRI_TRANSITIONS=560} [2022-12-13 18:16:09,250 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 179 predicate places. [2022-12-13 18:16:09,250 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 560 transitions, 8614 flow [2022-12-13 18:16:09,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 109.55555555555556) internal successors, (1972), 18 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:09,250 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:16:09,250 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:16:09,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-13 18:16:09,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:16:09,452 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:16:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:16:09,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1639121704, now seen corresponding path program 2 times [2022-12-13 18:16:09,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:16:09,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120306941] [2022-12-13 18:16:09,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:16:09,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:16:09,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:16:09,458 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:16:09,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 18:16:09,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:16:09,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:16:09,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 18:16:09,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:16:09,608 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:16:09,608 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 18:16:09,627 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 18:16:09,669 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 18:16:09,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:16:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:16:09,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:16:09,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120306941] [2022-12-13 18:16:09,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120306941] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 18:16:09,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:16:09,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2022-12-13 18:16:09,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498277108] [2022-12-13 18:16:09,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:16:09,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:16:09,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:16:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:16:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:16:09,932 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2022-12-13 18:16:09,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 560 transitions, 8614 flow. Second operand has 5 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:09,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:16:09,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2022-12-13 18:16:09,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:16:30,650 INFO L130 PetriNetUnfolder]: 45123/82961 cut-off events. [2022-12-13 18:16:30,650 INFO L131 PetriNetUnfolder]: For 850267/854889 co-relation queries the response was YES. [2022-12-13 18:16:31,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547472 conditions, 82961 events. 45123/82961 cut-off events. For 850267/854889 co-relation queries the response was YES. Maximal size of possible extension queue 1632. Compared 779146 event pairs, 18747 based on Foata normal form. 4008/86841 useless extension candidates. Maximal degree in co-relation 547377. Up to 59019 conditions per place. [2022-12-13 18:16:31,681 INFO L137 encePairwiseOnDemand]: 266/273 looper letters, 296 selfloop transitions, 276 changer transitions 0/593 dead transitions. [2022-12-13 18:16:31,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 593 transitions, 10213 flow [2022-12-13 18:16:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:16:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:16:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 571 transitions. [2022-12-13 18:16:31,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4183150183150183 [2022-12-13 18:16:31,683 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 571 transitions. [2022-12-13 18:16:31,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 571 transitions. [2022-12-13 18:16:31,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:16:31,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 571 transitions. [2022-12-13 18:16:31,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:31,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:31,685 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:31,685 INFO L175 Difference]: Start difference. First operand has 217 places, 560 transitions, 8614 flow. Second operand 5 states and 571 transitions. [2022-12-13 18:16:31,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 593 transitions, 10213 flow [2022-12-13 18:16:51,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 593 transitions, 9935 flow, removed 30 selfloop flow, removed 6 redundant places. [2022-12-13 18:16:51,750 INFO L231 Difference]: Finished difference. Result has 216 places, 560 transitions, 9164 flow [2022-12-13 18:16:51,750 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=8336, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9164, PETRI_PLACES=216, PETRI_TRANSITIONS=560} [2022-12-13 18:16:51,750 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 178 predicate places. [2022-12-13 18:16:51,750 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 560 transitions, 9164 flow [2022-12-13 18:16:51,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:51,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:16:51,751 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:16:51,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-13 18:16:51,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:16:51,952 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:16:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:16:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash 577620370, now seen corresponding path program 2 times [2022-12-13 18:16:51,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:16:51,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612975283] [2022-12-13 18:16:51,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:16:51,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:16:51,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:16:51,954 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:16:51,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 18:16:52,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:16:52,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:16:52,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 18:16:52,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:16:52,189 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 18:16:52,189 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 18:16:52,207 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 18:16:52,240 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 18:16:52,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:16:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:16:52,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:16:52,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612975283] [2022-12-13 18:16:52,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612975283] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 18:16:52,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:16:52,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2022-12-13 18:16:52,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275719636] [2022-12-13 18:16:52,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:16:52,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:16:52,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:16:52,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:16:52,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:16:52,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2022-12-13 18:16:52,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 560 transitions, 9164 flow. Second operand has 5 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:52,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:16:52,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2022-12-13 18:16:52,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:14,361 INFO L130 PetriNetUnfolder]: 45275/81699 cut-off events. [2022-12-13 18:17:14,361 INFO L131 PetriNetUnfolder]: For 1039811/1040727 co-relation queries the response was YES. [2022-12-13 18:17:15,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553091 conditions, 81699 events. 45275/81699 cut-off events. For 1039811/1040727 co-relation queries the response was YES. Maximal size of possible extension queue 1557. Compared 748830 event pairs, 13474 based on Foata normal form. 500/82138 useless extension candidates. Maximal degree in co-relation 552996. Up to 44138 conditions per place. [2022-12-13 18:17:15,358 INFO L137 encePairwiseOnDemand]: 266/273 looper letters, 434 selfloop transitions, 160 changer transitions 0/622 dead transitions. [2022-12-13 18:17:15,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 622 transitions, 11534 flow [2022-12-13 18:17:15,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:17:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:17:15,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 571 transitions. [2022-12-13 18:17:15,360 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4183150183150183 [2022-12-13 18:17:15,360 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 571 transitions. [2022-12-13 18:17:15,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 571 transitions. [2022-12-13 18:17:15,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:15,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 571 transitions. [2022-12-13 18:17:15,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:15,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:15,362 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:15,362 INFO L175 Difference]: Start difference. First operand has 216 places, 560 transitions, 9164 flow. Second operand 5 states and 571 transitions. [2022-12-13 18:17:15,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 622 transitions, 11534 flow [2022-12-13 18:17:36,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 622 transitions, 10850 flow, removed 43 selfloop flow, removed 8 redundant places. [2022-12-13 18:17:36,335 INFO L231 Difference]: Finished difference. Result has 213 places, 560 transitions, 9036 flow [2022-12-13 18:17:36,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=8556, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9036, PETRI_PLACES=213, PETRI_TRANSITIONS=560} [2022-12-13 18:17:36,336 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 175 predicate places. [2022-12-13 18:17:36,336 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 560 transitions, 9036 flow [2022-12-13 18:17:36,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:36,336 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:36,336 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:17:36,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:17:36,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:36,537 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:17:36,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:36,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2035932198, now seen corresponding path program 1 times [2022-12-13 18:17:36,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:36,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292303005] [2022-12-13 18:17:36,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:36,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:36,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:36,543 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:36,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-13 18:17:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:36,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 18:17:36,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:36,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 18:17:36,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-12-13 18:17:36,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:36,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 46 [2022-12-13 18:17:37,104 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 18:17:37,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:17:37,486 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse3 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse4 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_585 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_585) c_~A~0.base))) (concat (concat (concat (select .cse1 .cse2) (select .cse1 .cse3)) (select .cse1 .cse4)) (select .cse1 c_~A~0.offset))))) (or (= (bvadd (bvneg .cse0) |c_thread1Thread1of1ForFork1_~tmp~0#1|) (_ bv0 32)) (not (bvsle |c_thread1Thread1of1ForFork1_~tmp~0#1| (bvadd (_ bv2147483647 32) .cse0)))))) (forall ((v_ArrVal_585 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse5 (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_585) c_~A~0.base))) (concat (concat (concat (select .cse6 .cse2) (select .cse6 .cse3)) (select .cse6 .cse4)) (select .cse6 c_~A~0.offset))))) (or (= (bvadd (bvneg .cse5) |c_thread1Thread1of1ForFork1_~tmp~0#1|) (_ bv0 32)) (not (bvsge .cse5 (_ bv0 32)))))))) is different from false [2022-12-13 18:17:37,610 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-13 18:17:37,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 220 treesize of output 146 [2022-12-13 18:17:37,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:37,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 54 [2022-12-13 18:17:40,004 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-13 18:17:40,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 310 treesize of output 166 [2022-12-13 18:17:40,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:40,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 74 [2022-12-13 18:17:52,351 WARN L233 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 644 DAG size of output: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:17:52,632 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 18:17:52,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:52,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292303005] [2022-12-13 18:17:52,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292303005] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:17:52,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:17:52,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-12-13 18:17:52,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174999616] [2022-12-13 18:17:52,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:17:52,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 18:17:52,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:52,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 18:17:52,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=279, Unknown=1, NotChecked=34, Total=380 [2022-12-13 18:17:53,034 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 273 [2022-12-13 18:17:53,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 560 transitions, 9036 flow. Second operand has 20 states, 20 states have (on average 83.9) internal successors, (1678), 20 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:53,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:53,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 273 [2022-12-13 18:17:53,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:18:27,754 INFO L130 PetriNetUnfolder]: 63877/114284 cut-off events. [2022-12-13 18:18:27,754 INFO L131 PetriNetUnfolder]: For 1317753/1317753 co-relation queries the response was YES. [2022-12-13 18:18:28,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797891 conditions, 114284 events. 63877/114284 cut-off events. For 1317753/1317753 co-relation queries the response was YES. Maximal size of possible extension queue 2210. Compared 1081541 event pairs, 12976 based on Foata normal form. 174/114458 useless extension candidates. Maximal degree in co-relation 797800. Up to 84013 conditions per place. [2022-12-13 18:18:29,228 INFO L137 encePairwiseOnDemand]: 264/273 looper letters, 758 selfloop transitions, 283 changer transitions 9/1050 dead transitions. [2022-12-13 18:18:29,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 1050 transitions, 18640 flow [2022-12-13 18:18:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 18:18:29,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 18:18:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1707 transitions. [2022-12-13 18:18:29,232 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.329091960670908 [2022-12-13 18:18:29,232 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1707 transitions. [2022-12-13 18:18:29,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1707 transitions. [2022-12-13 18:18:29,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:18:29,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1707 transitions. [2022-12-13 18:18:29,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 89.84210526315789) internal successors, (1707), 19 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:29,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 273.0) internal successors, (5460), 20 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:29,237 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 273.0) internal successors, (5460), 20 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:18:29,237 INFO L175 Difference]: Start difference. First operand has 213 places, 560 transitions, 9036 flow. Second operand 19 states and 1707 transitions. [2022-12-13 18:18:29,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 1050 transitions, 18640 flow [2022-12-13 18:19:39,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 1050 transitions, 17571 flow, removed 49 selfloop flow, removed 11 redundant places. [2022-12-13 18:19:39,367 INFO L231 Difference]: Finished difference. Result has 233 places, 771 transitions, 13188 flow [2022-12-13 18:19:39,367 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=8397, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13188, PETRI_PLACES=233, PETRI_TRANSITIONS=771} [2022-12-13 18:19:39,367 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 195 predicate places. [2022-12-13 18:19:39,368 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 771 transitions, 13188 flow [2022-12-13 18:19:39,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 83.9) internal successors, (1678), 20 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:39,368 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:19:39,368 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:19:39,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 18:19:39,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:19:39,569 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 18:19:39,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:19:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1378564170, now seen corresponding path program 2 times [2022-12-13 18:19:39,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:19:39,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216956806] [2022-12-13 18:19:39,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:19:39,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:19:39,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:19:39,575 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:19:39,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-13 18:19:39,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:19:39,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-12-13 18:19:39,873 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:19:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:19:39,994 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-12-13 18:19:39,994 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:19:39,995 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (21 of 22 remaining) [2022-12-13 18:19:39,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 22 remaining) [2022-12-13 18:19:39,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2022-12-13 18:19:39,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2022-12-13 18:19:39,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK (6 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 22 remaining) [2022-12-13 18:19:39,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2022-12-13 18:19:39,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2022-12-13 18:19:40,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -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 18:19:40,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8413a52-e026-4dfa-8af8-f6c47d73e1f9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:19:40,199 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:19:40,204 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 18:19:40,205 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 18:19:40,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 06:19:40 BasicIcfg [2022-12-13 18:19:40,229 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 18:19:40,229 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 18:19:40,229 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 18:19:40,229 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 18:19:40,230 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:12:14" (3/4) ... [2022-12-13 18:19:40,232 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 18:19:40,232 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 18:19:40,232 INFO L158 Benchmark]: Toolchain (without parser) took 446467.75ms. Allocated memory was 62.9MB in the beginning and 7.4GB in the end (delta: 7.4GB). Free memory was 33.4MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 6.2GB. Max. memory is 16.1GB. [2022-12-13 18:19:40,232 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 62.9MB. Free memory was 41.5MB in the beginning and 41.4MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 18:19:40,232 INFO L158 Benchmark]: CACSL2BoogieTranslator took 265.91ms. Allocated memory was 62.9MB in the beginning and 83.9MB in the end (delta: 21.0MB). Free memory was 33.3MB in the beginning and 57.0MB in the end (delta: -23.7MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. [2022-12-13 18:19:40,233 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.95ms. Allocated memory is still 83.9MB. Free memory was 56.7MB in the beginning and 54.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 18:19:40,233 INFO L158 Benchmark]: Boogie Preprocessor took 24.17ms. Allocated memory is still 83.9MB. Free memory was 54.7MB in the beginning and 52.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 18:19:40,233 INFO L158 Benchmark]: RCFGBuilder took 596.76ms. Allocated memory is still 83.9MB. Free memory was 52.9MB in the beginning and 37.9MB in the end (delta: 15.0MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. [2022-12-13 18:19:40,234 INFO L158 Benchmark]: TraceAbstraction took 445540.70ms. Allocated memory was 83.9MB in the beginning and 7.4GB in the end (delta: 7.4GB). Free memory was 37.1MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 6.1GB. Max. memory is 16.1GB. [2022-12-13 18:19:40,234 INFO L158 Benchmark]: Witness Printer took 2.38ms. Allocated memory is still 7.4GB. Free memory was 1.2GB in the beginning and 1.2GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 18:19:40,235 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 62.9MB. Free memory was 41.5MB in the beginning and 41.4MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 265.91ms. Allocated memory was 62.9MB in the beginning and 83.9MB in the end (delta: 21.0MB). Free memory was 33.3MB in the beginning and 57.0MB in the end (delta: -23.7MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.95ms. Allocated memory is still 83.9MB. Free memory was 56.7MB in the beginning and 54.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.17ms. Allocated memory is still 83.9MB. Free memory was 54.7MB in the beginning and 52.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 596.76ms. Allocated memory is still 83.9MB. Free memory was 52.9MB in the beginning and 37.9MB in the end (delta: 15.0MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. * TraceAbstraction took 445540.70ms. Allocated memory was 83.9MB in the beginning and 7.4GB in the end (delta: 7.4GB). Free memory was 37.1MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 6.1GB. Max. memory is 16.1GB. * Witness Printer took 2.38ms. Allocated memory is still 7.4GB. Free memory was 1.2GB in the beginning and 1.2GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 13.3s, 126 PlacesBefore, 38 PlacesAfterwards, 128 TransitionsBefore, 34 TransitionsAfterwards, 936 CoEnabledTransitionPairs, 7 FixpointIterations, 83 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 138 TotalNumberOfCompositions, 1568 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1229, independent: 1192, independent conditional: 0, independent unconditional: 1192, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 474, independent: 464, independent conditional: 0, independent unconditional: 464, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1229, independent: 728, independent conditional: 0, independent unconditional: 728, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 474, unknown conditional: 0, unknown unconditional: 474] , Statistics on independence cache: Total cache size (in pairs): 69, Positive cache size: 66, Positive conditional cache size: 0, Positive unconditional cache size: 66, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 87]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 87. Possible FailurePath: [L41] 0 int* A; [L42] 0 int counter, N; [L75] 0 pthread_t t1, t2; [L77] 0 N = __VERIFIER_nondet_int() [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L97] 0 int i = 0; VAL [\old(size)=1, A={0:0}, arr={3:0}, counter=0, i=0, N=1, size=1] [L97] COND TRUE 0 i < size [L98] 0 arr[i] = __VERIFIER_nondet_int() [L97] 0 i++ VAL [\old(size)=1, A={0:0}, arr={3:0}, counter=0, i=1, N=1, size=1] [L97] COND FALSE 0 !(i < size) [L100] 0 return arr; [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={3:0}, counter=0, N=1, pthread_create(&t1, 0, thread1, 0)=0, t1={23:0}, t2={31:0}] [L82] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={3:0}, counter=0, N=1, pthread_create(&t2, 0, thread2, 0)=1, t1={23:0}, t2={31:0}] [L83] 0 \read(t1) VAL [\read(t1)=0, A={3:0}, counter=0, N=1, t1={23:0}, t2={31:0}] [L49] 1 int i=0; VAL [A={3:0}, counter=0, i=0, N=1] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L62] 2 int i=0; VAL [A={3:0}, counter=0, i=0, N=1] [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L67] 2 counter = tmp [L62] 2 i++ VAL [A={3:0}, counter=-2, i=1, N=1, tmp=-2] [L54] 1 counter = tmp [L49] 1 i++ VAL [A={3:0}, counter=2, i=1, N=1, tmp=2] [L49] COND FALSE 1 !(i