./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R --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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- 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-38b53e6 [2022-11-25 17:37:49,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:37:49,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:37:49,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:37:49,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:37:49,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:37:49,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:37:49,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:37:49,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:37:49,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:37:49,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:37:49,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:37:49,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:37:49,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:37:49,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:37:49,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:37:49,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:37:49,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:37:49,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:37:49,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:37:49,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:37:49,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:37:49,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:37:49,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:37:49,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:37:49,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:37:49,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:37:49,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:37:49,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:37:49,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:37:49,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:37:49,762 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:37:49,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:37:49,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:37:49,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:37:49,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:37:49,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:37:49,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:37:49,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:37:49,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:37:49,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:37:49,774 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:37:49,818 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:37:49,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:37:49,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:37:49,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:37:49,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:37:49,821 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:37:49,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:37:49,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:37:49,822 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:37:49,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:37:49,824 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:37:49,824 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:37:49,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:37:49,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:37:49,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:37:49,825 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:37:49,825 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:37:49,825 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:37:49,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:37:49,826 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:37:49,826 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:37:49,826 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:37:49,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:37:49,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:37:49,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:37:49,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:37:49,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:37:49,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:37:49,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:37:49,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:37:49,829 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:37:49,829 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:37:49,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:37:49,830 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_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2022-11-25 17:37:50,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:37:50,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:37:50,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:37:50,246 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:37:50,247 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:37:50,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-25 17:37:53,326 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:37:53,546 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:37:53,547 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-25 17:37:53,554 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/data/709cec7e6/b5ed3f3f6afe4fbe877ff5853e68b7a8/FLAGee1273e0f [2022-11-25 17:37:53,573 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/data/709cec7e6/b5ed3f3f6afe4fbe877ff5853e68b7a8 [2022-11-25 17:37:53,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:37:53,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:37:53,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:37:53,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:37:53,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:37:53,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:53,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18dfecd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53, skipping insertion in model container [2022-11-25 17:37:53,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:53,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:37:53,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:37:53,857 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:37:53,859 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:37:53,864 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:37:53,865 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:37:53,873 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:37:53,876 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:37:53,876 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:37:53,877 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:37:53,877 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:37:53,878 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:37:53,878 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:37:53,879 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:37:53,880 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:37:53,888 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:37:53,898 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_997ffd1a-5091-45a1-839d-a7647ed5b203/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-25 17:37:53,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:37:53,936 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) [2022-11-25 17:37:53,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e621c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53, skipping insertion in model container [2022-11-25 17:37:53,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:37:53,940 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 17:37:53,942 INFO L158 Benchmark]: Toolchain (without parser) took 362.69ms. Allocated memory is still 151.0MB. Free memory was 118.6MB in the beginning and 115.6MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:37:53,943 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 113.2MB. Free memory is still 82.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:37:53,944 INFO L158 Benchmark]: CACSL2BoogieTranslator took 359.63ms. Allocated memory is still 151.0MB. Free memory was 118.6MB in the beginning and 115.6MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:37:53,946 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 113.2MB. Free memory is still 82.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 359.63ms. Allocated memory is still 151.0MB. Free memory was 118.6MB in the beginning and 115.6MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R --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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- 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-38b53e6 [2022-11-25 17:37:56,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:37:56,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:37:56,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:37:56,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:37:56,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:37:56,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:37:56,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:37:56,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:37:56,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:37:56,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:37:56,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:37:56,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:37:56,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:37:56,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:37:56,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:37:56,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:37:56,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:37:56,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:37:56,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:37:56,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:37:56,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:37:56,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:37:56,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:37:56,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:37:56,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:37:56,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:37:56,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:37:56,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:37:56,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:37:56,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:37:56,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:37:56,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:37:56,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:37:56,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:37:56,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:37:56,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:37:56,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:37:56,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:37:56,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:37:56,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:37:56,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:37:56,617 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:37:56,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:37:56,622 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:37:56,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:37:56,623 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:37:56,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:37:56,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:37:56,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:37:56,625 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:37:56,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:37:56,627 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:37:56,627 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:37:56,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:37:56,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:37:56,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:37:56,628 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:37:56,629 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:37:56,629 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:37:56,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:37:56,630 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:37:56,630 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:37:56,630 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:37:56,631 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:37:56,631 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:37:56,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:37:56,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:37:56,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:37:56,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:37:56,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:37:56,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:37:56,633 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:37:56,633 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:37:56,634 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:37:56,634 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:37:56,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:37:56,635 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:37:56,635 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_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2022-11-25 17:37:57,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:37:57,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:37:57,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:37:57,068 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:37:57,069 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:37:57,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-25 17:38:00,459 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:38:00,712 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:38:00,713 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-25 17:38:00,720 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/data/bbde885f4/b4ea714c10e64290a501e0669a5e5f45/FLAGb6d521671 [2022-11-25 17:38:00,735 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/data/bbde885f4/b4ea714c10e64290a501e0669a5e5f45 [2022-11-25 17:38:00,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:38:00,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:38:00,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:38:00,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:38:00,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:38:00,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:38:00" (1/1) ... [2022-11-25 17:38:00,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cdfb741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:00, skipping insertion in model container [2022-11-25 17:38:00,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:38:00" (1/1) ... [2022-11-25 17:38:00,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:38:00,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:38:00,961 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:00,968 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:00,977 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:00,978 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:00,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:00,990 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:00,991 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:00,992 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:00,992 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:00,993 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:00,994 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:00,995 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:00,996 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,007 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,015 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_997ffd1a-5091-45a1-839d-a7647ed5b203/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-25 17:38:01,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:38:01,067 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 17:38:01,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:38:01,087 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,090 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,093 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,095 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,099 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,103 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,104 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,106 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,106 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,107 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,108 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,109 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,110 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,111 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,118 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_997ffd1a-5091-45a1-839d-a7647ed5b203/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-25 17:38:01,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:38:01,140 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:38:01,169 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,170 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,172 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,174 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,177 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,179 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,180 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,182 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,183 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,185 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,185 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,186 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,187 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:38:01,195 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:38:01,201 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_997ffd1a-5091-45a1-839d-a7647ed5b203/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-25 17:38:01,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:38:01,240 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:38:01,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:01 WrapperNode [2022-11-25 17:38:01,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:38:01,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:38:01,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:38:01,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:38:01,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:01" (1/1) ... [2022-11-25 17:38:01,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:01" (1/1) ... [2022-11-25 17:38:01,340 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 148 [2022-11-25 17:38:01,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:38:01,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:38:01,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:38:01,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:38:01,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:01" (1/1) ... [2022-11-25 17:38:01,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:01" (1/1) ... [2022-11-25 17:38:01,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:01" (1/1) ... [2022-11-25 17:38:01,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:01" (1/1) ... [2022-11-25 17:38:01,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:01" (1/1) ... [2022-11-25 17:38:01,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:01" (1/1) ... [2022-11-25 17:38:01,400 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:01" (1/1) ... [2022-11-25 17:38:01,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:01" (1/1) ... [2022-11-25 17:38:01,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:38:01,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:38:01,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:38:01,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:38:01,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:01" (1/1) ... [2022-11-25 17:38:01,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:38:01,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:38:01,443 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:38:01,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:38:01,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:38:01,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:38:01,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:38:01,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:38:01,514 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:38:01,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:38:01,515 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:38:01,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:38:01,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:38:01,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:38:01,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:38:01,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:38:01,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:38:01,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:38:01,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:38:01,521 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:38:01,697 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:38:01,702 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:38:02,241 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:38:02,374 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:38:02,374 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:38:02,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:38:02 BoogieIcfgContainer [2022-11-25 17:38:02,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:38:02,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:38:02,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:38:02,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:38:02,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:38:00" (1/3) ... [2022-11-25 17:38:02,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b688ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:38:02, skipping insertion in model container [2022-11-25 17:38:02,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:38:01" (2/3) ... [2022-11-25 17:38:02,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b688ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:38:02, skipping insertion in model container [2022-11-25 17:38:02,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:38:02" (3/3) ... [2022-11-25 17:38:02,394 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2022-11-25 17:38:02,409 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:38:02,409 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-25 17:38:02,409 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:38:02,571 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:38:02,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 159 transitions, 334 flow [2022-11-25 17:38:02,726 INFO L130 PetriNetUnfolder]: 11/157 cut-off events. [2022-11-25 17:38:02,727 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:38:02,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 157 events. 11/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 211 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2022-11-25 17:38:02,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 159 transitions, 334 flow [2022-11-25 17:38:02,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 152 transitions, 316 flow [2022-11-25 17:38:02,743 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:38:02,770 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 152 transitions, 316 flow [2022-11-25 17:38:02,773 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 152 transitions, 316 flow [2022-11-25 17:38:02,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 152 transitions, 316 flow [2022-11-25 17:38:02,809 INFO L130 PetriNetUnfolder]: 11/152 cut-off events. [2022-11-25 17:38:02,810 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:38:02,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 152 events. 11/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 207 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2022-11-25 17:38:02,813 INFO L119 LiptonReduction]: Number of co-enabled transitions 1984 [2022-11-25 17:38:25,015 INFO L134 LiptonReduction]: Checked pairs total: 2257 [2022-11-25 17:38:25,016 INFO L136 LiptonReduction]: Total number of compositions: 164 [2022-11-25 17:38:25,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:38:25,040 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;@6b12be3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:38:25,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2022-11-25 17:38:25,043 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:38:25,043 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:38:25,044 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:25,044 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:38:25,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:25,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:25,051 INFO L85 PathProgramCache]: Analyzing trace with hash 21527, now seen corresponding path program 1 times [2022-11-25 17:38:25,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:25,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716919367] [2022-11-25 17:38:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:25,064 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 [2022-11-25 17:38:25,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:25,073 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:25,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:25,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:38:25,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:25,359 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 17:38:25,360 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 [2022-11-25 17:38:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:25,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:25,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:25,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716919367] [2022-11-25 17:38:25,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716919367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:25,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:25,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:38:25,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936212028] [2022-11-25 17:38:25,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:25,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:38:25,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:25,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:38:25,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:38:25,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2022-11-25 17:38:25,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:25,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:25,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2022-11-25 17:38:25,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:25,920 INFO L130 PetriNetUnfolder]: 533/760 cut-off events. [2022-11-25 17:38:25,920 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 17:38:25,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1540 conditions, 760 events. 533/760 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 3321 event pairs, 264 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 1356. Up to 754 conditions per place. [2022-11-25 17:38:25,929 INFO L137 encePairwiseOnDemand]: 320/323 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2022-11-25 17:38:25,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 140 flow [2022-11-25 17:38:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:38:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:38:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2022-11-25 17:38:25,947 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4551083591331269 [2022-11-25 17:38:25,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2022-11-25 17:38:25,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2022-11-25 17:38:25,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:25,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2022-11-25 17:38:25,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:25,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:25,968 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:25,970 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 82 flow. Second operand 3 states and 441 transitions. [2022-11-25 17:38:25,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 140 flow [2022-11-25 17:38:25,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:38:25,982 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 72 flow [2022-11-25 17:38:25,985 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2022-11-25 17:38:25,990 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2022-11-25 17:38:25,991 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 72 flow [2022-11-25 17:38:25,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:25,992 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:25,992 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:38:26,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:26,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:26,204 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:26,205 INFO L85 PathProgramCache]: Analyzing trace with hash 21649, now seen corresponding path program 1 times [2022-11-25 17:38:26,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:26,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216137179] [2022-11-25 17:38:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:26,206 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 [2022-11-25 17:38:26,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:26,208 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:26,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:26,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:38:26,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:26,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:38:26,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:38:26,381 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:38:26,381 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 [2022-11-25 17:38:26,408 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 [2022-11-25 17:38:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:26,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:26,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:26,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216137179] [2022-11-25 17:38:26,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216137179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:26,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:26,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:38:26,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492792718] [2022-11-25 17:38:26,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:26,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:38:26,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:26,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:38:26,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:38:26,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2022-11-25 17:38:26,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:26,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:26,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2022-11-25 17:38:26,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:26,963 INFO L130 PetriNetUnfolder]: 403/587 cut-off events. [2022-11-25 17:38:26,963 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:38:26,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 587 events. 403/587 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 2445 event pairs, 198 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 1173. Up to 581 conditions per place. [2022-11-25 17:38:26,968 INFO L137 encePairwiseOnDemand]: 320/323 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2022-11-25 17:38:26,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 126 flow [2022-11-25 17:38:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:38:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:38:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2022-11-25 17:38:26,976 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45304437564499483 [2022-11-25 17:38:26,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2022-11-25 17:38:26,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2022-11-25 17:38:26,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:26,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2022-11-25 17:38:26,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:26,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:26,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:26,985 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 72 flow. Second operand 3 states and 439 transitions. [2022-11-25 17:38:26,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 126 flow [2022-11-25 17:38:26,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 125 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:38:26,987 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 69 flow [2022-11-25 17:38:26,987 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=69, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2022-11-25 17:38:26,989 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2022-11-25 17:38:26,990 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 69 flow [2022-11-25 17:38:26,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:26,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:26,990 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:38:27,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:27,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:27,202 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:27,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:27,203 INFO L85 PathProgramCache]: Analyzing trace with hash 21528, now seen corresponding path program 1 times [2022-11-25 17:38:27,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:27,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360864469] [2022-11-25 17:38:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:27,204 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 [2022-11-25 17:38:27,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:27,205 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:27,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:27,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:38:27,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:27,381 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:38:27,381 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 [2022-11-25 17:38:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:27,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:27,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:27,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360864469] [2022-11-25 17:38:27,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360864469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:27,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:27,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:38:27,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749889589] [2022-11-25 17:38:27,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:27,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:38:27,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:27,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:38:27,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:38:27,597 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2022-11-25 17:38:27,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:27,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:27,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2022-11-25 17:38:27,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:28,066 INFO L130 PetriNetUnfolder]: 805/1172 cut-off events. [2022-11-25 17:38:28,067 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:38:28,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 1172 events. 805/1172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 5660 event pairs, 396 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 2344. Up to 582 conditions per place. [2022-11-25 17:38:28,075 INFO L137 encePairwiseOnDemand]: 320/323 looper letters, 54 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2022-11-25 17:38:28,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 58 transitions, 239 flow [2022-11-25 17:38:28,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:38:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:38:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2022-11-25 17:38:28,078 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47987616099071206 [2022-11-25 17:38:28,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2022-11-25 17:38:28,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2022-11-25 17:38:28,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:28,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2022-11-25 17:38:28,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:28,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:28,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:28,083 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 69 flow. Second operand 3 states and 465 transitions. [2022-11-25 17:38:28,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 58 transitions, 239 flow [2022-11-25 17:38:28,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 58 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:38:28,085 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 80 flow [2022-11-25 17:38:28,085 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=68, 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=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2022-11-25 17:38:28,086 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2022-11-25 17:38:28,086 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 80 flow [2022-11-25 17:38:28,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:28,087 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:28,087 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:38:28,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:28,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:28,298 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:28,299 INFO L85 PathProgramCache]: Analyzing trace with hash 21650, now seen corresponding path program 1 times [2022-11-25 17:38:28,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:28,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27586298] [2022-11-25 17:38:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:28,299 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 [2022-11-25 17:38:28,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:28,300 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:28,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:28,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:38:28,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:28,440 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-25 17:38:28,440 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 33 [2022-11-25 17:38:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:28,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:28,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:28,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27586298] [2022-11-25 17:38:28,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27586298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:28,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:28,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:38:28,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873303103] [2022-11-25 17:38:28,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:28,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:38:28,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:28,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:38:28,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:38:28,595 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 323 [2022-11-25 17:38:28,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:28,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:28,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 323 [2022-11-25 17:38:28,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:28,862 INFO L130 PetriNetUnfolder]: 545/826 cut-off events. [2022-11-25 17:38:28,862 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:38:28,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1665 conditions, 826 events. 545/826 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 4011 event pairs, 264 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 1656. Up to 814 conditions per place. [2022-11-25 17:38:28,868 INFO L137 encePairwiseOnDemand]: 320/323 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-11-25 17:38:28,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 132 flow [2022-11-25 17:38:28,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:38:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:38:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2022-11-25 17:38:28,871 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44169246646026833 [2022-11-25 17:38:28,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2022-11-25 17:38:28,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2022-11-25 17:38:28,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:28,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2022-11-25 17:38:28,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:28,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:28,876 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:28,876 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 80 flow. Second operand 3 states and 428 transitions. [2022-11-25 17:38:28,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 132 flow [2022-11-25 17:38:28,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:38:28,877 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 76 flow [2022-11-25 17:38:28,878 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, 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=76, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2022-11-25 17:38:28,878 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2022-11-25 17:38:28,879 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 76 flow [2022-11-25 17:38:28,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:28,879 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:28,880 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:38:28,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:29,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:29,090 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:29,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:29,091 INFO L85 PathProgramCache]: Analyzing trace with hash 671195, now seen corresponding path program 1 times [2022-11-25 17:38:29,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:29,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480780726] [2022-11-25 17:38:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:29,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:29,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:29,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:29,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:29,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:38:29,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:29,264 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:38:29,264 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 [2022-11-25 17:38:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:29,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:38:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:29,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:29,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480780726] [2022-11-25 17:38:29,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480780726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:38:29,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:38:29,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 17:38:29,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881354378] [2022-11-25 17:38:29,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:38:29,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:38:29,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:29,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:38:29,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:38:30,588 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 323 [2022-11-25 17:38:30,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 132.0) internal successors, (792), 6 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:30,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:30,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 323 [2022-11-25 17:38:30,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:31,326 INFO L130 PetriNetUnfolder]: 819/1242 cut-off events. [2022-11-25 17:38:31,326 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:38:31,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2501 conditions, 1242 events. 819/1242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 6437 event pairs, 396 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 2491. Up to 408 conditions per place. [2022-11-25 17:38:31,334 INFO L137 encePairwiseOnDemand]: 319/323 looper letters, 74 selfloop transitions, 7 changer transitions 0/83 dead transitions. [2022-11-25 17:38:31,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 83 transitions, 358 flow [2022-11-25 17:38:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:38:31,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:38:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 870 transitions. [2022-11-25 17:38:31,338 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44891640866873067 [2022-11-25 17:38:31,338 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 870 transitions. [2022-11-25 17:38:31,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 870 transitions. [2022-11-25 17:38:31,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:31,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 870 transitions. [2022-11-25 17:38:31,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:31,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 323.0) internal successors, (2261), 7 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:31,346 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 323.0) internal successors, (2261), 7 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:31,346 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 76 flow. Second operand 6 states and 870 transitions. [2022-11-25 17:38:31,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 83 transitions, 358 flow [2022-11-25 17:38:31,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:38:31,351 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 129 flow [2022-11-25 17:38:31,352 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2022-11-25 17:38:31,354 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2022-11-25 17:38:31,354 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 129 flow [2022-11-25 17:38:31,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 132.0) internal successors, (792), 6 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:31,355 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:31,356 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:38:31,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:31,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:31,568 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:31,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:31,568 INFO L85 PathProgramCache]: Analyzing trace with hash 20819251, now seen corresponding path program 1 times [2022-11-25 17:38:31,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:31,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465391154] [2022-11-25 17:38:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:31,570 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 [2022-11-25 17:38:31,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:31,571 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:31,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:31,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:38:31,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:31,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:38:31,729 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-25 17:38:31,729 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 [2022-11-25 17:38:31,741 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 26 treesize of output 24 [2022-11-25 17:38:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:31,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:31,784 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:31,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465391154] [2022-11-25 17:38:31,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465391154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:31,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:31,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:38:31,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800317160] [2022-11-25 17:38:31,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:31,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:38:31,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:31,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:38:31,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:38:31,899 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2022-11-25 17:38:31,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:31,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:31,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2022-11-25 17:38:31,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:32,167 INFO L130 PetriNetUnfolder]: 759/1143 cut-off events. [2022-11-25 17:38:32,167 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:38:32,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2329 conditions, 1143 events. 759/1143 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 5783 event pairs, 366 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 2314. Up to 1125 conditions per place. [2022-11-25 17:38:32,174 INFO L137 encePairwiseOnDemand]: 320/323 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2022-11-25 17:38:32,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 33 transitions, 187 flow [2022-11-25 17:38:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:38:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:38:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2022-11-25 17:38:32,177 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44891640866873067 [2022-11-25 17:38:32,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2022-11-25 17:38:32,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2022-11-25 17:38:32,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:32,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2022-11-25 17:38:32,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:32,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:32,183 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:32,183 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 129 flow. Second operand 3 states and 435 transitions. [2022-11-25 17:38:32,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 33 transitions, 187 flow [2022-11-25 17:38:32,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 177 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 17:38:32,185 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 117 flow [2022-11-25 17:38:32,186 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2022-11-25 17:38:32,186 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2022-11-25 17:38:32,187 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 117 flow [2022-11-25 17:38:32,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:32,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:32,187 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:38:32,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:32,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:32,400 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:32,400 INFO L85 PathProgramCache]: Analyzing trace with hash 20819250, now seen corresponding path program 1 times [2022-11-25 17:38:32,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:32,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47152474] [2022-11-25 17:38:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:32,401 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 [2022-11-25 17:38:32,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:32,403 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:32,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:32,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:38:32,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:32,531 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-25 17:38:32,531 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 22 [2022-11-25 17:38:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:32,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:32,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:32,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47152474] [2022-11-25 17:38:32,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47152474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:32,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:32,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:38:32,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470028687] [2022-11-25 17:38:32,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:32,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:38:32,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:32,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:38:32,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:38:32,673 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 323 [2022-11-25 17:38:32,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:32,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:32,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 323 [2022-11-25 17:38:32,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:32,934 INFO L130 PetriNetUnfolder]: 699/1044 cut-off events. [2022-11-25 17:38:32,934 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-25 17:38:32,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2128 conditions, 1044 events. 699/1044 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 5163 event pairs, 336 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 2112. Up to 1026 conditions per place. [2022-11-25 17:38:32,940 INFO L137 encePairwiseOnDemand]: 320/323 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2022-11-25 17:38:32,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 171 flow [2022-11-25 17:38:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:38:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:38:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2022-11-25 17:38:32,942 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4375644994840041 [2022-11-25 17:38:32,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2022-11-25 17:38:32,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2022-11-25 17:38:32,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:32,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2022-11-25 17:38:32,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:32,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:32,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:32,947 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 117 flow. Second operand 3 states and 424 transitions. [2022-11-25 17:38:32,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 171 flow [2022-11-25 17:38:32,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:38:32,949 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 114 flow [2022-11-25 17:38:32,949 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=39, 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=114, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2022-11-25 17:38:32,950 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2022-11-25 17:38:32,950 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 114 flow [2022-11-25 17:38:32,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:32,950 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:32,951 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:38:32,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:33,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:33,168 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash 645391898, now seen corresponding path program 1 times [2022-11-25 17:38:33,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:33,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752078334] [2022-11-25 17:38:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:33,169 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 [2022-11-25 17:38:33,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:33,170 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:33,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:33,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:38:33,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:33,286 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 17:38:33,286 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 [2022-11-25 17:38:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:33,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:33,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:33,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752078334] [2022-11-25 17:38:33,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752078334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:33,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:33,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:38:33,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491959482] [2022-11-25 17:38:33,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:33,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:38:33,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:33,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:38:33,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:38:33,465 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 323 [2022-11-25 17:38:33,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:33,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:33,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 323 [2022-11-25 17:38:33,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:33,689 INFO L130 PetriNetUnfolder]: 402/627 cut-off events. [2022-11-25 17:38:33,689 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-25 17:38:33,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 627 events. 402/627 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2894 event pairs, 189 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 1278. Up to 605 conditions per place. [2022-11-25 17:38:33,692 INFO L137 encePairwiseOnDemand]: 318/323 looper letters, 22 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2022-11-25 17:38:33,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 28 transitions, 160 flow [2022-11-25 17:38:33,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:38:33,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:38:33,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 543 transitions. [2022-11-25 17:38:33,694 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42027863777089786 [2022-11-25 17:38:33,694 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 543 transitions. [2022-11-25 17:38:33,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 543 transitions. [2022-11-25 17:38:33,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:33,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 543 transitions. [2022-11-25 17:38:33,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:33,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:33,699 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:33,699 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 114 flow. Second operand 4 states and 543 transitions. [2022-11-25 17:38:33,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 28 transitions, 160 flow [2022-11-25 17:38:33,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 28 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:38:33,701 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 115 flow [2022-11-25 17:38:33,701 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, 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} [2022-11-25 17:38:33,701 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2022-11-25 17:38:33,701 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 115 flow [2022-11-25 17:38:33,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:33,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:33,702 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:38:33,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:33,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:33,912 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:33,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:33,913 INFO L85 PathProgramCache]: Analyzing trace with hash 645391899, now seen corresponding path program 1 times [2022-11-25 17:38:33,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:33,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360825905] [2022-11-25 17:38:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:33,913 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 [2022-11-25 17:38:33,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:33,914 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:33,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:33,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:38:33,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:34,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:34,030 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:34,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360825905] [2022-11-25 17:38:34,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360825905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:34,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:34,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:38:34,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020065355] [2022-11-25 17:38:34,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:34,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:38:34,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:34,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:38:34,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:38:34,098 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 323 [2022-11-25 17:38:34,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:34,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:34,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 323 [2022-11-25 17:38:34,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:34,460 INFO L130 PetriNetUnfolder]: 366/672 cut-off events. [2022-11-25 17:38:34,460 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-25 17:38:34,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 672 events. 366/672 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3490 event pairs, 63 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 1379. Up to 247 conditions per place. [2022-11-25 17:38:34,464 INFO L137 encePairwiseOnDemand]: 317/323 looper letters, 46 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2022-11-25 17:38:34,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 268 flow [2022-11-25 17:38:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:38:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:38:34,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 714 transitions. [2022-11-25 17:38:34,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4421052631578947 [2022-11-25 17:38:34,467 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 714 transitions. [2022-11-25 17:38:34,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 714 transitions. [2022-11-25 17:38:34,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:34,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 714 transitions. [2022-11-25 17:38:34,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:34,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:34,473 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:34,473 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 115 flow. Second operand 5 states and 714 transitions. [2022-11-25 17:38:34,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 268 flow [2022-11-25 17:38:34,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 263 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:38:34,475 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 154 flow [2022-11-25 17:38:34,475 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2022-11-25 17:38:34,476 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2022-11-25 17:38:34,476 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 154 flow [2022-11-25 17:38:34,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:34,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:34,476 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:38:34,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:34,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:34,688 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:34,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1475466024, now seen corresponding path program 2 times [2022-11-25 17:38:34,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:34,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138996048] [2022-11-25 17:38:34,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:38:34,689 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 [2022-11-25 17:38:34,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:34,691 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:34,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:34,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:38:34,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:38:34,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:38:34,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:34,877 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:38:34,877 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 [2022-11-25 17:38:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:35,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:38:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:35,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:35,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138996048] [2022-11-25 17:38:35,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138996048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:38:35,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:38:35,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:38:35,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696653574] [2022-11-25 17:38:35,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:38:35,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:38:35,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:35,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:38:35,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:38:39,718 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 323 [2022-11-25 17:38:39,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 154 flow. Second operand has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:39,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:39,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 323 [2022-11-25 17:38:39,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:43,961 INFO L130 PetriNetUnfolder]: 1202/2134 cut-off events. [2022-11-25 17:38:43,961 INFO L131 PetriNetUnfolder]: For 1652/1764 co-relation queries the response was YES. [2022-11-25 17:38:43,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5906 conditions, 2134 events. 1202/2134 cut-off events. For 1652/1764 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13212 event pairs, 690 based on Foata normal form. 114/1692 useless extension candidates. Maximal degree in co-relation 5884. Up to 511 conditions per place. [2022-11-25 17:38:43,973 INFO L137 encePairwiseOnDemand]: 319/323 looper letters, 202 selfloop transitions, 12 changer transitions 0/217 dead transitions. [2022-11-25 17:38:43,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 217 transitions, 1286 flow [2022-11-25 17:38:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:38:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:38:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1774 transitions. [2022-11-25 17:38:43,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45768833849329205 [2022-11-25 17:38:43,980 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1774 transitions. [2022-11-25 17:38:43,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1774 transitions. [2022-11-25 17:38:44,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:44,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1774 transitions. [2022-11-25 17:38:44,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 147.83333333333334) internal successors, (1774), 12 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:44,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 323.0) internal successors, (4199), 13 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:44,025 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 323.0) internal successors, (4199), 13 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:44,026 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 154 flow. Second operand 12 states and 1774 transitions. [2022-11-25 17:38:44,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 217 transitions, 1286 flow [2022-11-25 17:38:44,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 217 transitions, 1286 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:38:44,039 INFO L231 Difference]: Finished difference. Result has 64 places, 39 transitions, 253 flow [2022-11-25 17:38:44,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=253, PETRI_PLACES=64, PETRI_TRANSITIONS=39} [2022-11-25 17:38:44,041 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2022-11-25 17:38:44,041 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 39 transitions, 253 flow [2022-11-25 17:38:44,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:44,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:44,042 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:44,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:44,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:44,254 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:44,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:44,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1751431471, now seen corresponding path program 1 times [2022-11-25 17:38:44,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:44,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676574514] [2022-11-25 17:38:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:44,255 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 [2022-11-25 17:38:44,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:44,256 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:44,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:44,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:38:44,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:44,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:44,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:44,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676574514] [2022-11-25 17:38:44,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676574514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:44,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:44,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:38:44,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520674433] [2022-11-25 17:38:44,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:44,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:38:44,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:44,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:38:44,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:38:44,362 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 323 [2022-11-25 17:38:44,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:44,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:44,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 323 [2022-11-25 17:38:44,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:44,880 INFO L130 PetriNetUnfolder]: 1142/2054 cut-off events. [2022-11-25 17:38:44,881 INFO L131 PetriNetUnfolder]: For 1282/1442 co-relation queries the response was YES. [2022-11-25 17:38:44,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5726 conditions, 2054 events. 1142/2054 cut-off events. For 1282/1442 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12322 event pairs, 540 based on Foata normal form. 100/1584 useless extension candidates. Maximal degree in co-relation 5695. Up to 1645 conditions per place. [2022-11-25 17:38:44,890 INFO L137 encePairwiseOnDemand]: 320/323 looper letters, 42 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2022-11-25 17:38:44,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 47 transitions, 363 flow [2022-11-25 17:38:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:38:44,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:38:44,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2022-11-25 17:38:44,893 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46233230134158926 [2022-11-25 17:38:44,893 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2022-11-25 17:38:44,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2022-11-25 17:38:44,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:44,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2022-11-25 17:38:44,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:44,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:44,898 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:44,898 INFO L175 Difference]: Start difference. First operand has 64 places, 39 transitions, 253 flow. Second operand 3 states and 448 transitions. [2022-11-25 17:38:44,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 47 transitions, 363 flow [2022-11-25 17:38:44,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 47 transitions, 338 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-11-25 17:38:44,903 INFO L231 Difference]: Finished difference. Result has 63 places, 39 transitions, 239 flow [2022-11-25 17:38:44,903 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=63, PETRI_TRANSITIONS=39} [2022-11-25 17:38:44,904 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 24 predicate places. [2022-11-25 17:38:44,904 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 39 transitions, 239 flow [2022-11-25 17:38:44,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:44,905 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:44,905 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:44,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-25 17:38:45,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:45,117 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:45,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1751431452, now seen corresponding path program 1 times [2022-11-25 17:38:45,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:45,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958852063] [2022-11-25 17:38:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:45,117 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 [2022-11-25 17:38:45,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:45,118 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:45,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:45,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:38:45,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:45,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:45,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:45,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958852063] [2022-11-25 17:38:45,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958852063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:45,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:45,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:38:45,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297197197] [2022-11-25 17:38:45,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:45,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:38:45,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:45,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:38:45,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:38:45,365 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2022-11-25 17:38:45,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 39 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:45,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:45,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2022-11-25 17:38:45,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:45,892 INFO L130 PetriNetUnfolder]: 1037/1845 cut-off events. [2022-11-25 17:38:45,892 INFO L131 PetriNetUnfolder]: For 1769/1912 co-relation queries the response was YES. [2022-11-25 17:38:45,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5466 conditions, 1845 events. 1037/1845 cut-off events. For 1769/1912 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11063 event pairs, 576 based on Foata normal form. 129/1602 useless extension candidates. Maximal degree in co-relation 5434. Up to 1778 conditions per place. [2022-11-25 17:38:45,911 INFO L137 encePairwiseOnDemand]: 318/323 looper letters, 44 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2022-11-25 17:38:45,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 50 transitions, 366 flow [2022-11-25 17:38:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:38:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:38:45,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 578 transitions. [2022-11-25 17:38:45,914 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2022-11-25 17:38:45,914 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 578 transitions. [2022-11-25 17:38:45,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 578 transitions. [2022-11-25 17:38:45,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:45,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 578 transitions. [2022-11-25 17:38:45,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:45,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:45,919 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:45,919 INFO L175 Difference]: Start difference. First operand has 63 places, 39 transitions, 239 flow. Second operand 4 states and 578 transitions. [2022-11-25 17:38:45,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 50 transitions, 366 flow [2022-11-25 17:38:45,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 50 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:38:45,924 INFO L231 Difference]: Finished difference. Result has 67 places, 40 transitions, 261 flow [2022-11-25 17:38:45,925 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=261, PETRI_PLACES=67, PETRI_TRANSITIONS=40} [2022-11-25 17:38:45,926 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 28 predicate places. [2022-11-25 17:38:45,926 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 40 transitions, 261 flow [2022-11-25 17:38:45,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:45,926 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:45,926 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:45,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:46,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:46,138 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:46,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:46,139 INFO L85 PathProgramCache]: Analyzing trace with hash -337284807, now seen corresponding path program 1 times [2022-11-25 17:38:46,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:46,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130858987] [2022-11-25 17:38:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:46,140 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 [2022-11-25 17:38:46,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:46,141 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:46,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:46,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:38:46,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:46,334 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:38:46,334 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 [2022-11-25 17:38:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:46,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:38:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:47,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:47,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130858987] [2022-11-25 17:38:47,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130858987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:38:47,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:38:47,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 17:38:47,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260684519] [2022-11-25 17:38:47,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:38:47,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:38:47,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:47,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:38:47,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:38:53,722 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 323 [2022-11-25 17:38:53,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 40 transitions, 261 flow. Second operand has 8 states, 8 states have (on average 128.75) internal successors, (1030), 8 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:53,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:53,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 323 [2022-11-25 17:38:53,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:58,151 INFO L130 PetriNetUnfolder]: 854/1548 cut-off events. [2022-11-25 17:38:58,151 INFO L131 PetriNetUnfolder]: For 1929/2051 co-relation queries the response was YES. [2022-11-25 17:38:58,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4740 conditions, 1548 events. 854/1548 cut-off events. For 1929/2051 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9176 event pairs, 468 based on Foata normal form. 202/1636 useless extension candidates. Maximal degree in co-relation 4705. Up to 1177 conditions per place. [2022-11-25 17:38:58,160 INFO L137 encePairwiseOnDemand]: 316/323 looper letters, 68 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2022-11-25 17:38:58,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 588 flow [2022-11-25 17:38:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:38:58,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:38:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1340 transitions. [2022-11-25 17:38:58,165 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4148606811145511 [2022-11-25 17:38:58,166 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1340 transitions. [2022-11-25 17:38:58,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1340 transitions. [2022-11-25 17:38:58,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:58,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1340 transitions. [2022-11-25 17:38:58,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 134.0) internal successors, (1340), 10 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:58,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 323.0) internal successors, (3553), 11 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:58,177 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 323.0) internal successors, (3553), 11 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:58,177 INFO L175 Difference]: Start difference. First operand has 67 places, 40 transitions, 261 flow. Second operand 10 states and 1340 transitions. [2022-11-25 17:38:58,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 588 flow [2022-11-25 17:38:58,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 578 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 17:38:58,184 INFO L231 Difference]: Finished difference. Result has 76 places, 41 transitions, 299 flow [2022-11-25 17:38:58,185 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=299, PETRI_PLACES=76, PETRI_TRANSITIONS=41} [2022-11-25 17:38:58,185 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 37 predicate places. [2022-11-25 17:38:58,186 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 41 transitions, 299 flow [2022-11-25 17:38:58,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 128.75) internal successors, (1030), 8 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:58,186 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:58,187 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:58,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:58,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:58,400 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:58,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:58,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1629464484, now seen corresponding path program 2 times [2022-11-25 17:38:58,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:58,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778561561] [2022-11-25 17:38:58,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:38:58,402 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 [2022-11-25 17:38:58,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:58,403 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:58,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:58,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:38:58,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:38:58,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:38:58,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:58,576 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:38:58,576 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 [2022-11-25 17:38:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:38:58,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:58,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:58,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778561561] [2022-11-25 17:38:58,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778561561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:58,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:58,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:38:58,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089392202] [2022-11-25 17:38:58,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:58,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:38:58,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:58,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:38:58,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:38:59,088 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 323 [2022-11-25 17:38:59,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 41 transitions, 299 flow. Second operand has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:59,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:59,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 323 [2022-11-25 17:38:59,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:59,454 INFO L130 PetriNetUnfolder]: 488/954 cut-off events. [2022-11-25 17:38:59,454 INFO L131 PetriNetUnfolder]: For 2640/2751 co-relation queries the response was YES. [2022-11-25 17:38:59,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2942 conditions, 954 events. 488/954 cut-off events. For 2640/2751 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5314 event pairs, 252 based on Foata normal form. 278/1130 useless extension candidates. Maximal degree in co-relation 2905. Up to 902 conditions per place. [2022-11-25 17:38:59,457 INFO L137 encePairwiseOnDemand]: 318/323 looper letters, 28 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2022-11-25 17:38:59,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 38 transitions, 343 flow [2022-11-25 17:38:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:38:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:38:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 552 transitions. [2022-11-25 17:38:59,459 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42724458204334365 [2022-11-25 17:38:59,459 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 552 transitions. [2022-11-25 17:38:59,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 552 transitions. [2022-11-25 17:38:59,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:59,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 552 transitions. [2022-11-25 17:38:59,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:59,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:59,464 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:59,464 INFO L175 Difference]: Start difference. First operand has 76 places, 41 transitions, 299 flow. Second operand 4 states and 552 transitions. [2022-11-25 17:38:59,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 38 transitions, 343 flow [2022-11-25 17:38:59,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 38 transitions, 287 flow, removed 11 selfloop flow, removed 12 redundant places. [2022-11-25 17:38:59,469 INFO L231 Difference]: Finished difference. Result has 64 places, 38 transitions, 231 flow [2022-11-25 17:38:59,469 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=64, PETRI_TRANSITIONS=38} [2022-11-25 17:38:59,470 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2022-11-25 17:38:59,470 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 38 transitions, 231 flow [2022-11-25 17:38:59,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:59,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:59,470 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-25 17:38:59,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:59,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:59,682 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:38:59,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:59,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1982889464, now seen corresponding path program 3 times [2022-11-25 17:38:59,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:59,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116939902] [2022-11-25 17:38:59,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:38:59,683 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 [2022-11-25 17:38:59,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:59,684 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:38:59,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:38:59,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 17:38:59,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:38:59,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:38:59,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:39:00,000 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:39:00,001 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 [2022-11-25 17:39:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:39:00,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:39:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:39:04,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:39:04,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116939902] [2022-11-25 17:39:04,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116939902] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:39:04,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:39:04,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-25 17:39:04,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776956673] [2022-11-25 17:39:04,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:39:04,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:39:04,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:39:04,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:39:04,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:39:26,242 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 323 [2022-11-25 17:39:26,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 38 transitions, 231 flow. Second operand has 24 states, 24 states have (on average 133.0) internal successors, (3192), 24 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:26,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:39:26,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 323 [2022-11-25 17:39:26,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:39:47,941 INFO L130 PetriNetUnfolder]: 1124/2178 cut-off events. [2022-11-25 17:39:47,941 INFO L131 PetriNetUnfolder]: For 3493/3648 co-relation queries the response was YES. [2022-11-25 17:39:47,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6482 conditions, 2178 events. 1124/2178 cut-off events. For 3493/3648 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 12875 event pairs, 576 based on Foata normal form. 164/2308 useless extension candidates. Maximal degree in co-relation 6452. Up to 547 conditions per place. [2022-11-25 17:39:47,949 INFO L137 encePairwiseOnDemand]: 319/323 looper letters, 370 selfloop transitions, 24 changer transitions 0/397 dead transitions. [2022-11-25 17:39:47,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 397 transitions, 2591 flow [2022-11-25 17:39:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:39:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 17:39:47,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3511 transitions. [2022-11-25 17:39:47,960 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45291537667698656 [2022-11-25 17:39:47,960 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3511 transitions. [2022-11-25 17:39:47,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3511 transitions. [2022-11-25 17:39:47,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:39:47,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3511 transitions. [2022-11-25 17:39:47,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 146.29166666666666) internal successors, (3511), 24 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:47,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 323.0) internal successors, (8075), 25 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:47,982 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 323.0) internal successors, (8075), 25 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:47,983 INFO L175 Difference]: Start difference. First operand has 64 places, 38 transitions, 231 flow. Second operand 24 states and 3511 transitions. [2022-11-25 17:39:47,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 397 transitions, 2591 flow [2022-11-25 17:39:47,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 397 transitions, 2566 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:39:47,997 INFO L231 Difference]: Finished difference. Result has 98 places, 51 transitions, 410 flow [2022-11-25 17:39:47,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=410, PETRI_PLACES=98, PETRI_TRANSITIONS=51} [2022-11-25 17:39:47,998 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 59 predicate places. [2022-11-25 17:39:47,998 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 51 transitions, 410 flow [2022-11-25 17:39:48,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 133.0) internal successors, (3192), 24 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:48,000 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:39:48,000 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:39:48,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:39:48,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:39:48,219 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:39:48,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:39:48,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1830124303, now seen corresponding path program 1 times [2022-11-25 17:39:48,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:39:48,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293776953] [2022-11-25 17:39:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:39:48,220 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 [2022-11-25 17:39:48,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:39:48,221 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:39:48,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:39:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:39:48,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:39:48,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:39:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:39:48,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:39:48,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:39:48,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293776953] [2022-11-25 17:39:48,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293776953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:39:48,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:39:48,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:39:48,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477028926] [2022-11-25 17:39:48,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:39:48,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:39:48,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:39:48,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:39:48,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:39:48,383 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 323 [2022-11-25 17:39:48,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 51 transitions, 410 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:48,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:39:48,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 323 [2022-11-25 17:39:48,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:39:48,929 INFO L130 PetriNetUnfolder]: 1544/2912 cut-off events. [2022-11-25 17:39:48,930 INFO L131 PetriNetUnfolder]: For 3691/3844 co-relation queries the response was YES. [2022-11-25 17:39:48,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8612 conditions, 2912 events. 1544/2912 cut-off events. For 3691/3844 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 17292 event pairs, 576 based on Foata normal form. 153/2831 useless extension candidates. Maximal degree in co-relation 8569. Up to 1901 conditions per place. [2022-11-25 17:39:48,941 INFO L137 encePairwiseOnDemand]: 320/323 looper letters, 48 selfloop transitions, 2 changer transitions 8/60 dead transitions. [2022-11-25 17:39:48,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 60 transitions, 556 flow [2022-11-25 17:39:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:39:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:39:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2022-11-25 17:39:48,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4613003095975232 [2022-11-25 17:39:48,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2022-11-25 17:39:48,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2022-11-25 17:39:48,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:39:48,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2022-11-25 17:39:48,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:48,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:48,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:48,948 INFO L175 Difference]: Start difference. First operand has 98 places, 51 transitions, 410 flow. Second operand 3 states and 447 transitions. [2022-11-25 17:39:48,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 60 transitions, 556 flow [2022-11-25 17:39:48,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 60 transitions, 508 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-11-25 17:39:48,960 INFO L231 Difference]: Finished difference. Result has 91 places, 48 transitions, 347 flow [2022-11-25 17:39:48,960 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=91, PETRI_TRANSITIONS=48} [2022-11-25 17:39:48,960 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 52 predicate places. [2022-11-25 17:39:48,961 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 48 transitions, 347 flow [2022-11-25 17:39:48,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:48,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:39:48,961 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:39:48,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:39:49,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:39:49,174 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:39:49,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:39:49,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1582107647, now seen corresponding path program 1 times [2022-11-25 17:39:49,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:39:49,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337390488] [2022-11-25 17:39:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:39:49,175 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 [2022-11-25 17:39:49,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:39:49,176 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:39:49,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:39:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:39:49,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:39:49,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:39:49,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-25 17:39:49,433 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 [2022-11-25 17:39:49,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:39:49,577 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 89 treesize of output 19 [2022-11-25 17:39:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:39:49,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:39:50,081 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 188 treesize of output 184 [2022-11-25 17:39:50,297 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-25 17:39:50,298 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 280 treesize of output 188 [2022-11-25 17:39:50,313 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 114 treesize of output 110 [2022-11-25 17:39:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:39:55,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:39:55,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337390488] [2022-11-25 17:39:55,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337390488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:39:55,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:39:55,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:39:55,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023627876] [2022-11-25 17:39:55,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:39:55,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:39:55,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:39:55,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:39:55,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:39:58,201 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 323 [2022-11-25 17:39:58,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 48 transitions, 347 flow. Second operand has 12 states, 12 states have (on average 126.83333333333333) internal successors, (1522), 12 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:58,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:39:58,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 323 [2022-11-25 17:39:58,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:39:59,894 INFO L130 PetriNetUnfolder]: 1443/2727 cut-off events. [2022-11-25 17:39:59,894 INFO L131 PetriNetUnfolder]: For 2429/2469 co-relation queries the response was YES. [2022-11-25 17:39:59,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8215 conditions, 2727 events. 1443/2727 cut-off events. For 2429/2469 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 14516 event pairs, 80 based on Foata normal form. 20/2667 useless extension candidates. Maximal degree in co-relation 8170. Up to 881 conditions per place. [2022-11-25 17:39:59,906 INFO L137 encePairwiseOnDemand]: 317/323 looper letters, 55 selfloop transitions, 6 changer transitions 9/71 dead transitions. [2022-11-25 17:39:59,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 71 transitions, 567 flow [2022-11-25 17:39:59,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:39:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:39:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 912 transitions. [2022-11-25 17:39:59,910 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40336134453781514 [2022-11-25 17:39:59,911 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 912 transitions. [2022-11-25 17:39:59,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 912 transitions. [2022-11-25 17:39:59,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:39:59,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 912 transitions. [2022-11-25 17:39:59,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.28571428571428) internal successors, (912), 7 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:59,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:59,917 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:59,917 INFO L175 Difference]: Start difference. First operand has 91 places, 48 transitions, 347 flow. Second operand 7 states and 912 transitions. [2022-11-25 17:39:59,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 71 transitions, 567 flow [2022-11-25 17:39:59,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 71 transitions, 542 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-11-25 17:39:59,929 INFO L231 Difference]: Finished difference. Result has 90 places, 50 transitions, 362 flow [2022-11-25 17:39:59,930 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=362, PETRI_PLACES=90, PETRI_TRANSITIONS=50} [2022-11-25 17:39:59,930 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 51 predicate places. [2022-11-25 17:39:59,931 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 50 transitions, 362 flow [2022-11-25 17:39:59,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 126.83333333333333) internal successors, (1522), 12 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:59,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:39:59,931 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:39:59,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:00,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:40:00,149 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:40:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:00,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1888823529, now seen corresponding path program 2 times [2022-11-25 17:40:00,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:40:00,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922144851] [2022-11-25 17:40:00,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:40:00,150 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 [2022-11-25 17:40:00,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:40:00,151 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:40:00,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:40:00,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:40:00,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:40:00,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:40:00,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:00,411 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:40:00,411 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 [2022-11-25 17:40:00,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-25 17:40:00,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-25 17:40:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:40:01,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:40:01,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-25 17:40:01,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 12 [2022-11-25 17:40:01,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-25 17:40:01,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 10 [2022-11-25 17:40:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:40:02,815 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:40:02,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922144851] [2022-11-25 17:40:02,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922144851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:40:02,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:40:02,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-11-25 17:40:02,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702898803] [2022-11-25 17:40:02,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:40:02,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:40:02,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:40:02,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:40:02,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:40:07,942 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 323 [2022-11-25 17:40:07,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 50 transitions, 362 flow. Second operand has 13 states, 13 states have (on average 117.46153846153847) internal successors, (1527), 13 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:07,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:40:07,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 323 [2022-11-25 17:40:07,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:40:10,393 INFO L130 PetriNetUnfolder]: 1431/2710 cut-off events. [2022-11-25 17:40:10,393 INFO L131 PetriNetUnfolder]: For 2316/2318 co-relation queries the response was YES. [2022-11-25 17:40:10,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8249 conditions, 2710 events. 1431/2710 cut-off events. For 2316/2318 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 14507 event pairs, 462 based on Foata normal form. 4/2710 useless extension candidates. Maximal degree in co-relation 8206. Up to 2341 conditions per place. [2022-11-25 17:40:10,407 INFO L137 encePairwiseOnDemand]: 316/323 looper letters, 39 selfloop transitions, 10 changer transitions 34/84 dead transitions. [2022-11-25 17:40:10,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 84 transitions, 642 flow [2022-11-25 17:40:10,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:40:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:40:10,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1322 transitions. [2022-11-25 17:40:10,414 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3720799324514495 [2022-11-25 17:40:10,414 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1322 transitions. [2022-11-25 17:40:10,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1322 transitions. [2022-11-25 17:40:10,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:40:10,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1322 transitions. [2022-11-25 17:40:10,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 120.18181818181819) internal successors, (1322), 11 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:10,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 323.0) internal successors, (3876), 12 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:10,426 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 323.0) internal successors, (3876), 12 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:10,427 INFO L175 Difference]: Start difference. First operand has 90 places, 50 transitions, 362 flow. Second operand 11 states and 1322 transitions. [2022-11-25 17:40:10,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 84 transitions, 642 flow [2022-11-25 17:40:10,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 84 transitions, 628 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-25 17:40:10,440 INFO L231 Difference]: Finished difference. Result has 100 places, 49 transitions, 376 flow [2022-11-25 17:40:10,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=376, PETRI_PLACES=100, PETRI_TRANSITIONS=49} [2022-11-25 17:40:10,442 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 61 predicate places. [2022-11-25 17:40:10,442 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 49 transitions, 376 flow [2022-11-25 17:40:10,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 117.46153846153847) internal successors, (1527), 13 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:10,443 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:40:10,443 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:10,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:10,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:40:10,656 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:40:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash 720859676, now seen corresponding path program 3 times [2022-11-25 17:40:10,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:40:10,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314740888] [2022-11-25 17:40:10,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:40:10,658 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 [2022-11-25 17:40:10,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:40:10,660 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:40:10,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:40:10,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:40:10,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:40:10,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:40:10,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:11,012 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 17:40:11,012 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 [2022-11-25 17:40:11,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-25 17:40:11,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:40:11,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2022-11-25 17:40:11,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-25 17:40:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:40:11,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:40:12,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:40:12,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 350 treesize of output 210 [2022-11-25 17:40:12,121 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 210 treesize of output 206 [2022-11-25 17:40:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:40:14,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:40:14,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314740888] [2022-11-25 17:40:14,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314740888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:40:14,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:40:14,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2022-11-25 17:40:14,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337935490] [2022-11-25 17:40:14,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:40:14,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:40:14,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:40:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:40:14,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:40:17,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:40:26,654 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 323 [2022-11-25 17:40:26,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 49 transitions, 376 flow. Second operand has 16 states, 16 states have (on average 120.1875) internal successors, (1923), 16 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:26,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:40:26,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 323 [2022-11-25 17:40:26,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:40:29,956 INFO L130 PetriNetUnfolder]: 2416/4483 cut-off events. [2022-11-25 17:40:29,957 INFO L131 PetriNetUnfolder]: For 6288/6288 co-relation queries the response was YES. [2022-11-25 17:40:29,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14541 conditions, 4483 events. 2416/4483 cut-off events. For 6288/6288 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 26338 event pairs, 306 based on Foata normal form. 168/4651 useless extension candidates. Maximal degree in co-relation 14495. Up to 1508 conditions per place. [2022-11-25 17:40:30,004 INFO L137 encePairwiseOnDemand]: 315/323 looper letters, 68 selfloop transitions, 18 changer transitions 28/114 dead transitions. [2022-11-25 17:40:30,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 114 transitions, 859 flow [2022-11-25 17:40:30,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:40:30,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 17:40:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2097 transitions. [2022-11-25 17:40:30,019 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38189765070114734 [2022-11-25 17:40:30,019 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2097 transitions. [2022-11-25 17:40:30,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2097 transitions. [2022-11-25 17:40:30,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:40:30,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2097 transitions. [2022-11-25 17:40:30,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 123.3529411764706) internal successors, (2097), 17 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:30,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 323.0) internal successors, (5814), 18 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:30,036 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 323.0) internal successors, (5814), 18 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:30,036 INFO L175 Difference]: Start difference. First operand has 100 places, 49 transitions, 376 flow. Second operand 17 states and 2097 transitions. [2022-11-25 17:40:30,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 114 transitions, 859 flow [2022-11-25 17:40:30,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 114 transitions, 798 flow, removed 20 selfloop flow, removed 8 redundant places. [2022-11-25 17:40:30,066 INFO L231 Difference]: Finished difference. Result has 112 places, 62 transitions, 510 flow [2022-11-25 17:40:30,067 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=510, PETRI_PLACES=112, PETRI_TRANSITIONS=62} [2022-11-25 17:40:30,068 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 73 predicate places. [2022-11-25 17:40:30,068 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 62 transitions, 510 flow [2022-11-25 17:40:30,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 120.1875) internal successors, (1923), 16 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:30,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:40:30,069 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:30,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:30,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:40:30,283 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-11-25 17:40:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:30,283 INFO L85 PathProgramCache]: Analyzing trace with hash 235081013, now seen corresponding path program 4 times [2022-11-25 17:40:30,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:40:30,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144044974] [2022-11-25 17:40:30,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:40:30,284 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 [2022-11-25 17:40:30,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:40:30,286 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:40:30,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_997ffd1a-5091-45a1-839d-a7647ed5b203/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:40:30,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:40:30,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:40:30,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:40:30,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:30,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-25 17:40:31,037 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 21 treesize of output 17 [2022-11-25 17:40:32,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:40:32,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 181 treesize of output 39 [2022-11-25 17:40:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:40:32,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:40:38,809 INFO L321 Elim1Store]: treesize reduction 888, result has 19.1 percent of original size [2022-11-25 17:40:38,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 714 treesize of output 570 [2022-11-25 17:40:38,847 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 323 treesize of output 315 [2022-11-25 17:40:38,879 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 315 treesize of output 307 [2022-11-25 17:49:59,824 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification that was a NOOP. DAG size: 8125 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)