./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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_524fb794-37ad-4b46-aa88-a8f979b6723b/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 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --- 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 17:32:40,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:32:40,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:32:40,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:32:40,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:32:40,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:32:40,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:32:40,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:32:40,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:32:40,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:32:40,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:32:40,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:32:40,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:32:40,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:32:40,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:32:40,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:32:40,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:32:41,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:32:41,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:32:41,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:32:41,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:32:41,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:32:41,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:32:41,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:32:41,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:32:41,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:32:41,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:32:41,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:32:41,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:32:41,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:32:41,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:32:41,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:32:41,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:32:41,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:32:41,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:32:41,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:32:41,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:32:41,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:32:41,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:32:41,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:32:41,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:32:41,025 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:32:41,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:32:41,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:32:41,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:32:41,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:32:41,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:32:41,050 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:32:41,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:32:41,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:32:41,052 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:32:41,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:32:41,053 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:32:41,053 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:32:41,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:32:41,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:32:41,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:32:41,054 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:32:41,054 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:32:41,054 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:32:41,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:32:41,055 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:32:41,055 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:32:41,055 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:32:41,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:32:41,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:32:41,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:32:41,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:32:41,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:32:41,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:32:41,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:32:41,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:32:41,058 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:32:41,058 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:32:41,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:32:41,058 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_524fb794-37ad-4b46-aa88-a8f979b6723b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 [2022-11-25 17:32:41,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:32:41,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:32:41,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:32:41,363 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:32:41,364 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:32:41,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-11-25 17:32:44,481 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:32:44,765 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:32:44,766 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-11-25 17:32:44,773 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/data/e06b145a1/a85d21b781dd4b47a207e53a908c99a0/FLAGd5e9d0b36 [2022-11-25 17:32:44,788 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/data/e06b145a1/a85d21b781dd4b47a207e53a908c99a0 [2022-11-25 17:32:44,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:32:44,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:32:44,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:32:44,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:32:44,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:32:44,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:32:44" (1/1) ... [2022-11-25 17:32:44,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ed50f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:44, skipping insertion in model container [2022-11-25 17:32:44,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:32:44" (1/1) ... [2022-11-25 17:32:44,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:32:44,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:32:45,027 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_524fb794-37ad-4b46-aa88-a8f979b6723b/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-11-25 17:32:45,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:32:45,051 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 17:32:45,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5170683c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:45, skipping insertion in model container [2022-11-25 17:32:45,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:32:45,053 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 17:32:45,055 INFO L158 Benchmark]: Toolchain (without parser) took 261.57ms. Allocated memory is still 146.8MB. Free memory was 114.4MB in the beginning and 104.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:32:45,056 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 146.8MB. Free memory is still 119.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:32:45,057 INFO L158 Benchmark]: CACSL2BoogieTranslator took 258.71ms. Allocated memory is still 146.8MB. Free memory was 114.4MB in the beginning and 104.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:32:45,058 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 146.8MB. Free memory is still 119.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 258.71ms. Allocated memory is still 146.8MB. Free memory was 114.4MB in the beginning and 104.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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_524fb794-37ad-4b46-aa88-a8f979b6723b/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 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --- 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 17:32:47,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:32:47,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:32:47,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:32:47,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:32:47,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:32:47,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:32:47,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:32:47,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:32:47,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:32:47,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:32:47,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:32:47,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:32:47,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:32:47,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:32:47,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:32:47,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:32:47,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:32:47,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:32:47,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:32:47,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:32:47,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:32:47,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:32:47,646 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:32:47,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:32:47,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:32:47,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:32:47,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:32:47,659 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:32:47,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:32:47,660 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:32:47,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:32:47,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:32:47,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:32:47,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:32:47,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:32:47,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:32:47,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:32:47,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:32:47,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:32:47,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:32:47,688 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:32:47,731 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:32:47,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:32:47,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:32:47,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:32:47,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:32:47,735 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:32:47,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:32:47,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:32:47,737 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:32:47,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:32:47,738 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:32:47,739 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:32:47,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:32:47,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:32:47,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:32:47,740 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:32:47,740 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:32:47,740 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:32:47,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:32:47,741 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:32:47,741 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:32:47,741 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:32:47,742 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:32:47,742 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:32:47,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:32:47,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:32:47,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:32:47,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:32:47,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:32:47,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:32:47,744 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:32:47,745 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:32:47,745 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:32:47,745 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:32:47,746 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:32:47,746 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:32:47,746 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_524fb794-37ad-4b46-aa88-a8f979b6723b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 [2022-11-25 17:32:48,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:32:48,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:32:48,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:32:48,190 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:32:48,193 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:32:48,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-11-25 17:32:51,229 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:32:51,503 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:32:51,504 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-11-25 17:32:51,518 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/data/1c148a399/d7c74e6a638f419588e11377b30dbbac/FLAG0970b862a [2022-11-25 17:32:51,551 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/data/1c148a399/d7c74e6a638f419588e11377b30dbbac [2022-11-25 17:32:51,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:32:51,556 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:32:51,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:32:51,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:32:51,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:32:51,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:32:51" (1/1) ... [2022-11-25 17:32:51,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e64a693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:51, skipping insertion in model container [2022-11-25 17:32:51,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:32:51" (1/1) ... [2022-11-25 17:32:51,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:32:51,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:32:51,880 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_524fb794-37ad-4b46-aa88-a8f979b6723b/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-11-25 17:32:51,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:32:51,933 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 17:32:51,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:32:51,986 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_524fb794-37ad-4b46-aa88-a8f979b6723b/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-11-25 17:32:51,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:32:52,002 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:32:52,049 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_524fb794-37ad-4b46-aa88-a8f979b6723b/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-11-25 17:32:52,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:32:52,077 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:32:52,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:52 WrapperNode [2022-11-25 17:32:52,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:32:52,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:32:52,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:32:52,080 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:32:52,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:52" (1/1) ... [2022-11-25 17:32:52,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:52" (1/1) ... [2022-11-25 17:32:52,158 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 198 [2022-11-25 17:32:52,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:32:52,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:32:52,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:32:52,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:32:52,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:52" (1/1) ... [2022-11-25 17:32:52,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:52" (1/1) ... [2022-11-25 17:32:52,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:52" (1/1) ... [2022-11-25 17:32:52,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:52" (1/1) ... [2022-11-25 17:32:52,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:52" (1/1) ... [2022-11-25 17:32:52,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:52" (1/1) ... [2022-11-25 17:32:52,231 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:52" (1/1) ... [2022-11-25 17:32:52,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:52" (1/1) ... [2022-11-25 17:32:52,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:32:52,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:32:52,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:32:52,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:32:52,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:52" (1/1) ... [2022-11-25 17:32:52,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:32:52,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:32:52,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:32:52,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:32:52,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:32:52,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:32:52,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:32:52,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:32:52,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:32:52,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:32:52,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:32:52,333 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:32:52,333 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:32:52,333 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:32:52,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:32:52,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:32:52,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:32:52,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:32:52,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:32:52,336 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 17:32:52,496 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:32:52,499 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:32:53,364 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:32:53,374 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:32:53,374 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 17:32:53,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:32:53 BoogieIcfgContainer [2022-11-25 17:32:53,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:32:53,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:32:53,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:32:53,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:32:53,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:32:51" (1/3) ... [2022-11-25 17:32:53,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15bbae3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:32:53, skipping insertion in model container [2022-11-25 17:32:53,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:52" (2/3) ... [2022-11-25 17:32:53,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15bbae3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:32:53, skipping insertion in model container [2022-11-25 17:32:53,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:32:53" (3/3) ... [2022-11-25 17:32:53,386 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2022-11-25 17:32:53,417 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:32:53,417 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-11-25 17:32:53,417 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:32:53,599 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:32:53,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 346 transitions, 716 flow [2022-11-25 17:32:53,891 INFO L130 PetriNetUnfolder]: 30/343 cut-off events. [2022-11-25 17:32:53,892 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:32:53,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 343 events. 30/343 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 464 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 216. Up to 3 conditions per place. [2022-11-25 17:32:53,900 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 346 transitions, 716 flow [2022-11-25 17:32:53,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 338 transitions, 694 flow [2022-11-25 17:32:53,919 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:32:53,944 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 318 places, 338 transitions, 694 flow [2022-11-25 17:32:53,948 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 318 places, 338 transitions, 694 flow [2022-11-25 17:32:53,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 338 transitions, 694 flow [2022-11-25 17:32:54,031 INFO L130 PetriNetUnfolder]: 30/338 cut-off events. [2022-11-25 17:32:54,032 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:32:54,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 338 events. 30/338 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 463 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 216. Up to 3 conditions per place. [2022-11-25 17:32:54,039 INFO L119 LiptonReduction]: Number of co-enabled transitions 4560 [2022-11-25 17:34:51,383 INFO L134 LiptonReduction]: Checked pairs total: 7234 [2022-11-25 17:34:51,383 INFO L136 LiptonReduction]: Total number of compositions: 428 [2022-11-25 17:34:51,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:34:51,406 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;@43a22e19, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:34:51,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2022-11-25 17:34:51,410 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:34:51,411 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:34:51,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:51,412 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:34:51,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-25 17:34:51,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:51,417 INFO L85 PathProgramCache]: Analyzing trace with hash 42100, now seen corresponding path program 1 times [2022-11-25 17:34:51,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:34:51,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345098408] [2022-11-25 17:34:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:51,435 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 17:34:51,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:34:51,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:34:51,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:34:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:51,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:34:51,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:51,948 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:34:51,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:34:51,996 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 17:34:51,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:34:51,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:34:51,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345098408] [2022-11-25 17:34:51,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345098408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:51,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:34:51,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:34:52,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233604269] [2022-11-25 17:34:52,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:52,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:34:52,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:34:52,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:34:52,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:34:52,765 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 774 [2022-11-25 17:34:52,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 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 17:34:52,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:52,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 774 [2022-11-25 17:34:52,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:56,297 INFO L130 PetriNetUnfolder]: 8875/12108 cut-off events. [2022-11-25 17:34:56,297 INFO L131 PetriNetUnfolder]: For 194/194 co-relation queries the response was YES. [2022-11-25 17:34:56,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24547 conditions, 12108 events. 8875/12108 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 61062 event pairs, 6734 based on Foata normal form. 0/3153 useless extension candidates. Maximal degree in co-relation 11012. Up to 6057 conditions per place. [2022-11-25 17:34:56,384 INFO L137 encePairwiseOnDemand]: 764/774 looper letters, 132 selfloop transitions, 6 changer transitions 0/138 dead transitions. [2022-11-25 17:34:56,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 138 transitions, 588 flow [2022-11-25 17:34:56,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:34:56,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:34:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1070 transitions. [2022-11-25 17:34:56,409 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4608096468561585 [2022-11-25 17:34:56,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1070 transitions. [2022-11-25 17:34:56,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1070 transitions. [2022-11-25 17:34:56,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:56,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1070 transitions. [2022-11-25 17:34:56,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.6666666666667) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 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 17:34:56,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 17:34:56,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 17:34:56,455 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 162 flow. Second operand 3 states and 1070 transitions. [2022-11-25 17:34:56,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 138 transitions, 588 flow [2022-11-25 17:34:56,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 138 transitions, 564 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:34:56,469 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 198 flow [2022-11-25 17:34:56,471 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2022-11-25 17:34:56,475 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-11-25 17:34:56,475 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 198 flow [2022-11-25 17:34:56,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 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 17:34:56,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:56,477 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:34:56,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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)] Ended with exit code 0 [2022-11-25 17:34:56,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:34:56,690 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-25 17:34:56,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:56,691 INFO L85 PathProgramCache]: Analyzing trace with hash 42099, now seen corresponding path program 1 times [2022-11-25 17:34:56,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:34:56,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489796794] [2022-11-25 17:34:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:56,692 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 17:34:56,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:34:56,693 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:34:56,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:34:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:56,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:34:56,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:56,890 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:34:56,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 17:34:56,912 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 17:34:56,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:34:56,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:34:56,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489796794] [2022-11-25 17:34:56,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489796794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:56,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:34:56,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:34:56,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545674342] [2022-11-25 17:34:56,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:56,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:34:56,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:34:56,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:34:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:34:57,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 774 [2022-11-25 17:34:57,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 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 17:34:57,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:57,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 774 [2022-11-25 17:34:57,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:59,752 INFO L130 PetriNetUnfolder]: 8875/12102 cut-off events. [2022-11-25 17:34:59,752 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:34:59,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24342 conditions, 12102 events. 8875/12102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1216. Compared 62027 event pairs, 6734 based on Foata normal form. 4/3163 useless extension candidates. Maximal degree in co-relation 12151. Up to 12102 conditions per place. [2022-11-25 17:34:59,829 INFO L137 encePairwiseOnDemand]: 770/774 looper letters, 72 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2022-11-25 17:34:59,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 73 transitions, 338 flow [2022-11-25 17:34:59,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:34:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:34:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 998 transitions. [2022-11-25 17:34:59,834 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.429801894918174 [2022-11-25 17:34:59,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 998 transitions. [2022-11-25 17:34:59,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 998 transitions. [2022-11-25 17:34:59,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:59,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 998 transitions. [2022-11-25 17:34:59,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 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 17:34:59,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 17:34:59,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 17:34:59,847 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 198 flow. Second operand 3 states and 998 transitions. [2022-11-25 17:34:59,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 73 transitions, 338 flow [2022-11-25 17:34:59,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:34:59,852 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 182 flow [2022-11-25 17:34:59,852 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2022-11-25 17:34:59,853 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2022-11-25 17:34:59,853 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 182 flow [2022-11-25 17:34:59,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 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 17:34:59,856 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:59,857 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:34:59,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:00,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:00,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-25 17:35:00,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:00,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1312852, now seen corresponding path program 1 times [2022-11-25 17:35:00,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:35:00,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505001173] [2022-11-25 17:35:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:00,081 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 17:35:00,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:35:00,082 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:00,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:00,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:35:00,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:00,354 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:35:00,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:35:00,446 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 17:35:00,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:35:00,736 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 17:35:00,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:35:00,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505001173] [2022-11-25 17:35:00,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505001173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:35:00,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:35:00,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 17:35:00,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808846795] [2022-11-25 17:35:00,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:35:00,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:35:00,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:35:00,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:35:00,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:35:03,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 774 [2022-11-25 17:35:03,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 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 17:35:03,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:03,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 774 [2022-11-25 17:35:03,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:08,989 INFO L130 PetriNetUnfolder]: 13322/18167 cut-off events. [2022-11-25 17:35:08,989 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:35:09,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36539 conditions, 18167 events. 13322/18167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1173. Compared 95834 event pairs, 10101 based on Foata normal form. 0/4740 useless extension candidates. Maximal degree in co-relation 36531. Up to 6055 conditions per place. [2022-11-25 17:35:09,103 INFO L137 encePairwiseOnDemand]: 762/774 looper letters, 185 selfloop transitions, 27 changer transitions 0/212 dead transitions. [2022-11-25 17:35:09,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 212 transitions, 926 flow [2022-11-25 17:35:09,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:35:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:35:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1985 transitions. [2022-11-25 17:35:09,118 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42743324720068904 [2022-11-25 17:35:09,118 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1985 transitions. [2022-11-25 17:35:09,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1985 transitions. [2022-11-25 17:35:09,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:09,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1985 transitions. [2022-11-25 17:35:09,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 330.8333333333333) internal successors, (1985), 6 states have internal predecessors, (1985), 0 states have call successors, (0), 0 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 17:35:09,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 774.0) internal successors, (5418), 7 states have internal predecessors, (5418), 0 states have call successors, (0), 0 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 17:35:09,143 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 774.0) internal successors, (5418), 7 states have internal predecessors, (5418), 0 states have call successors, (0), 0 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 17:35:09,144 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 182 flow. Second operand 6 states and 1985 transitions. [2022-11-25 17:35:09,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 212 transitions, 926 flow [2022-11-25 17:35:09,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 212 transitions, 925 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:35:09,153 INFO L231 Difference]: Finished difference. Result has 76 places, 94 transitions, 385 flow [2022-11-25 17:35:09,154 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=76, PETRI_TRANSITIONS=94} [2022-11-25 17:35:09,156 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2022-11-25 17:35:09,158 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 94 transitions, 385 flow [2022-11-25 17:35:09,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 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 17:35:09,161 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:09,162 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:35:09,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:09,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:09,374 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-25 17:35:09,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:09,374 INFO L85 PathProgramCache]: Analyzing trace with hash 40830650, now seen corresponding path program 1 times [2022-11-25 17:35:09,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:35:09,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860220605] [2022-11-25 17:35:09,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:09,375 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 17:35:09,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:35:09,379 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:09,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:09,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:35:09,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:09,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:09,670 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-25 17:35:09,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-25 17:35:09,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:09,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:35:09,846 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:35:09,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:35:09,868 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 17:35:09,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:35:09,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:35:09,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860220605] [2022-11-25 17:35:09,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860220605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:35:09,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:35:09,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:35:09,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52199460] [2022-11-25 17:35:09,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:35:09,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:35:09,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:35:09,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:35:09,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:35:10,622 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 774 [2022-11-25 17:35:10,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 94 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 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 17:35:10,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:10,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 774 [2022-11-25 17:35:10,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:12,958 INFO L130 PetriNetUnfolder]: 10422/14382 cut-off events. [2022-11-25 17:35:12,958 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-25 17:35:12,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29043 conditions, 14382 events. 10422/14382 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 1193. Compared 76245 event pairs, 7854 based on Foata normal form. 0/4100 useless extension candidates. Maximal degree in co-relation 29030. Up to 14382 conditions per place. [2022-11-25 17:35:13,050 INFO L137 encePairwiseOnDemand]: 771/774 looper letters, 89 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2022-11-25 17:35:13,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 545 flow [2022-11-25 17:35:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:35:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:35:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2022-11-25 17:35:13,060 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43755383290267014 [2022-11-25 17:35:13,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2022-11-25 17:35:13,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2022-11-25 17:35:13,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:13,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2022-11-25 17:35:13,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 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 17:35:13,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 17:35:13,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 17:35:13,073 INFO L175 Difference]: Start difference. First operand has 76 places, 94 transitions, 385 flow. Second operand 3 states and 1016 transitions. [2022-11-25 17:35:13,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 545 flow [2022-11-25 17:35:13,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 90 transitions, 515 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-11-25 17:35:13,083 INFO L231 Difference]: Finished difference. Result has 75 places, 90 transitions, 337 flow [2022-11-25 17:35:13,083 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=337, PETRI_PLACES=75, PETRI_TRANSITIONS=90} [2022-11-25 17:35:13,085 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-11-25 17:35:13,086 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 90 transitions, 337 flow [2022-11-25 17:35:13,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 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 17:35:13,087 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:13,087 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:35:13,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:13,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:13,301 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-25 17:35:13,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:13,305 INFO L85 PathProgramCache]: Analyzing trace with hash 40830649, now seen corresponding path program 1 times [2022-11-25 17:35:13,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:35:13,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408783290] [2022-11-25 17:35:13,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:13,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:35:13,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:35:13,308 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:13,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:13,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:35:13,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:13,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:13,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:13,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:13,649 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 17:35:13,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-25 17:35:13,696 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-25 17:35:13,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2022-11-25 17:35:13,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:13,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:35:13,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:13,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:35:13,853 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 17:35:13,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:35:13,854 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:35:13,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408783290] [2022-11-25 17:35:13,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408783290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:35:13,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:35:13,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:35:13,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561306108] [2022-11-25 17:35:13,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:35:13,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:35:13,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:35:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:35:13,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:35:14,568 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 774 [2022-11-25 17:35:14,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 90 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 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 17:35:14,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:14,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 774 [2022-11-25 17:35:14,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:16,254 INFO L130 PetriNetUnfolder]: 7522/10597 cut-off events. [2022-11-25 17:35:16,254 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 17:35:16,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21447 conditions, 10597 events. 7522/10597 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 55474 event pairs, 5607 based on Foata normal form. 0/3449 useless extension candidates. Maximal degree in co-relation 21433. Up to 10597 conditions per place. [2022-11-25 17:35:16,318 INFO L137 encePairwiseOnDemand]: 771/774 looper letters, 85 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2022-11-25 17:35:16,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 86 transitions, 489 flow [2022-11-25 17:35:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:35:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:35:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1014 transitions. [2022-11-25 17:35:16,328 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2022-11-25 17:35:16,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1014 transitions. [2022-11-25 17:35:16,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1014 transitions. [2022-11-25 17:35:16,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:16,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1014 transitions. [2022-11-25 17:35:16,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.0) internal successors, (1014), 3 states have internal predecessors, (1014), 0 states have call successors, (0), 0 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 17:35:16,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 17:35:16,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 17:35:16,341 INFO L175 Difference]: Start difference. First operand has 75 places, 90 transitions, 337 flow. Second operand 3 states and 1014 transitions. [2022-11-25 17:35:16,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 86 transitions, 489 flow [2022-11-25 17:35:16,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:35:16,344 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 318 flow [2022-11-25 17:35:16,345 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2022-11-25 17:35:16,346 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2022-11-25 17:35:16,346 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 318 flow [2022-11-25 17:35:16,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 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 17:35:16,347 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:16,347 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:35:16,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:16,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:16,571 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-25 17:35:16,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:16,572 INFO L85 PathProgramCache]: Analyzing trace with hash 583578251, now seen corresponding path program 1 times [2022-11-25 17:35:16,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:35:16,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204337154] [2022-11-25 17:35:16,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:16,573 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 17:35:16,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:35:16,575 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:16,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:16,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:35:16,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:16,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:16,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:16,904 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-25 17:35:16,904 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-25 17:35:16,928 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 17:35:17,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:17,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:35:17,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:17,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:35:17,150 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 17:35:17,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:35:17,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:35:17,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204337154] [2022-11-25 17:35:17,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204337154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:35:17,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:35:17,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:35:17,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406828076] [2022-11-25 17:35:17,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:35:17,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:35:17,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:35:17,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:35:17,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:35:18,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 774 [2022-11-25 17:35:18,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 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 17:35:18,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:18,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 774 [2022-11-25 17:35:18,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:19,582 INFO L130 PetriNetUnfolder]: 7228/10156 cut-off events. [2022-11-25 17:35:19,582 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 17:35:19,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20566 conditions, 10156 events. 7228/10156 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 52736 event pairs, 5376 based on Foata normal form. 0/3386 useless extension candidates. Maximal degree in co-relation 20551. Up to 10156 conditions per place. [2022-11-25 17:35:19,655 INFO L137 encePairwiseOnDemand]: 771/774 looper letters, 83 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2022-11-25 17:35:19,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 482 flow [2022-11-25 17:35:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:35:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:35:19,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1012 transitions. [2022-11-25 17:35:19,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43583118001722654 [2022-11-25 17:35:19,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1012 transitions. [2022-11-25 17:35:19,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1012 transitions. [2022-11-25 17:35:19,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:19,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1012 transitions. [2022-11-25 17:35:19,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 337.3333333333333) internal successors, (1012), 3 states have internal predecessors, (1012), 0 states have call successors, (0), 0 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 17:35:19,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 17:35:19,675 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 17:35:19,675 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 318 flow. Second operand 3 states and 1012 transitions. [2022-11-25 17:35:19,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 482 flow [2022-11-25 17:35:19,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 481 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:35:19,679 INFO L231 Difference]: Finished difference. Result has 73 places, 84 transitions, 315 flow [2022-11-25 17:35:19,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=73, PETRI_TRANSITIONS=84} [2022-11-25 17:35:19,680 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2022-11-25 17:35:19,680 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 84 transitions, 315 flow [2022-11-25 17:35:19,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 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 17:35:19,681 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:19,682 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:35:19,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:19,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:19,895 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-25 17:35:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:19,896 INFO L85 PathProgramCache]: Analyzing trace with hash 583578253, now seen corresponding path program 1 times [2022-11-25 17:35:19,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:35:19,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450084697] [2022-11-25 17:35:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:19,896 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 17:35:19,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:35:19,898 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:19,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:20,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:35:20,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:20,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:20,162 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-25 17:35:20,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-25 17:35:20,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:20,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:35:20,333 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:35:20,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:35:20,392 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 17:35:20,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:35:20,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:35:20,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450084697] [2022-11-25 17:35:20,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450084697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:35:20,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:35:20,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:35:20,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320378713] [2022-11-25 17:35:20,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:35:20,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:35:20,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:35:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:35:20,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:35:21,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 774 [2022-11-25 17:35:21,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 84 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 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 17:35:21,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:21,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 774 [2022-11-25 17:35:21,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:22,743 INFO L130 PetriNetUnfolder]: 6934/9715 cut-off events. [2022-11-25 17:35:22,743 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 17:35:22,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19685 conditions, 9715 events. 6934/9715 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 50206 event pairs, 5145 based on Foata normal form. 0/3323 useless extension candidates. Maximal degree in co-relation 19669. Up to 9715 conditions per place. [2022-11-25 17:35:22,800 INFO L137 encePairwiseOnDemand]: 771/774 looper letters, 81 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2022-11-25 17:35:22,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 475 flow [2022-11-25 17:35:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:35:22,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:35:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1010 transitions. [2022-11-25 17:35:22,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43496985357450474 [2022-11-25 17:35:22,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1010 transitions. [2022-11-25 17:35:22,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1010 transitions. [2022-11-25 17:35:22,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:22,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1010 transitions. [2022-11-25 17:35:22,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 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 17:35:22,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 17:35:22,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 17:35:22,821 INFO L175 Difference]: Start difference. First operand has 73 places, 84 transitions, 315 flow. Second operand 3 states and 1010 transitions. [2022-11-25 17:35:22,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 475 flow [2022-11-25 17:35:22,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 474 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:35:22,825 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 312 flow [2022-11-25 17:35:22,825 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2022-11-25 17:35:22,826 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2022-11-25 17:35:22,826 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 312 flow [2022-11-25 17:35:22,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 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 17:35:22,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:22,828 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:35:22,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:23,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:23,041 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-25 17:35:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:23,041 INFO L85 PathProgramCache]: Analyzing trace with hash 583578204, now seen corresponding path program 1 times [2022-11-25 17:35:23,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:35:23,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745109397] [2022-11-25 17:35:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:23,042 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 17:35:23,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:35:23,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:23,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:23,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:35:23,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:23,273 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 17:35:23,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:35:23,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:35:23,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745109397] [2022-11-25 17:35:23,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745109397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:35:23,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:35:23,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:35:23,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58557114] [2022-11-25 17:35:23,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:35:23,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:35:23,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:35:23,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:35:23,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:35:23,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 774 [2022-11-25 17:35:23,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 309.5) internal successors, (1238), 4 states have internal predecessors, (1238), 0 states have call successors, (0), 0 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 17:35:23,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:23,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 774 [2022-11-25 17:35:23,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:26,199 INFO L130 PetriNetUnfolder]: 8918/12752 cut-off events. [2022-11-25 17:35:26,200 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-25 17:35:26,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25858 conditions, 12752 events. 8918/12752 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 71016 event pairs, 6720 based on Foata normal form. 0/4733 useless extension candidates. Maximal degree in co-relation 25841. Up to 9714 conditions per place. [2022-11-25 17:35:26,261 INFO L137 encePairwiseOnDemand]: 762/774 looper letters, 138 selfloop transitions, 3 changer transitions 0/141 dead transitions. [2022-11-25 17:35:26,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 141 transitions, 804 flow [2022-11-25 17:35:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:35:26,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:35:26,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1348 transitions. [2022-11-25 17:35:26,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4354005167958656 [2022-11-25 17:35:26,270 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1348 transitions. [2022-11-25 17:35:26,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1348 transitions. [2022-11-25 17:35:26,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:26,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1348 transitions. [2022-11-25 17:35:26,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 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 17:35:26,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 774.0) internal successors, (3870), 5 states have internal predecessors, (3870), 0 states have call successors, (0), 0 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 17:35:26,283 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 774.0) internal successors, (3870), 5 states have internal predecessors, (3870), 0 states have call successors, (0), 0 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 17:35:26,283 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 312 flow. Second operand 4 states and 1348 transitions. [2022-11-25 17:35:26,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 141 transitions, 804 flow [2022-11-25 17:35:26,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 141 transitions, 803 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:35:26,288 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 336 flow [2022-11-25 17:35:26,288 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2022-11-25 17:35:26,289 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-11-25 17:35:26,289 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 336 flow [2022-11-25 17:35:26,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 309.5) internal successors, (1238), 4 states have internal predecessors, (1238), 0 states have call successors, (0), 0 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 17:35:26,290 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:26,290 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:35:26,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:26,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:26,504 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-25 17:35:26,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash 464166004, now seen corresponding path program 2 times [2022-11-25 17:35:26,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:35:26,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721398583] [2022-11-25 17:35:26,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:35:26,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:35:26,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:35:26,506 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:26,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:35:26,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:35:26,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:35:26,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:35:26,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:26,818 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:35:26,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:35:27,051 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 17:35:27,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:35:28,107 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 17:35:28,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:35:28,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721398583] [2022-11-25 17:35:28,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721398583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:35:28,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:35:28,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:35:28,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161015785] [2022-11-25 17:35:28,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:35:28,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:35:28,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:35:28,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:35:28,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:35:40,922 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 774 [2022-11-25 17:35:40,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 336 flow. Second operand has 12 states, 12 states have (on average 298.0) internal successors, (3576), 12 states have internal predecessors, (3576), 0 states have call successors, (0), 0 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 17:35:40,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:40,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 774 [2022-11-25 17:35:40,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:45,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:47,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:48,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:50,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:53,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:55,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:56,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:58,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:36:09,960 INFO L130 PetriNetUnfolder]: 20792/29716 cut-off events. [2022-11-25 17:36:09,960 INFO L131 PetriNetUnfolder]: For 866/866 co-relation queries the response was YES. [2022-11-25 17:36:10,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64176 conditions, 29716 events. 20792/29716 cut-off events. For 866/866 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 179538 event pairs, 15680 based on Foata normal form. 18/11820 useless extension candidates. Maximal degree in co-relation 64157. Up to 4262 conditions per place. [2022-11-25 17:36:10,117 INFO L137 encePairwiseOnDemand]: 764/774 looper letters, 365 selfloop transitions, 43 changer transitions 0/408 dead transitions. [2022-11-25 17:36:10,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 408 transitions, 2052 flow [2022-11-25 17:36:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:36:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:36:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3984 transitions. [2022-11-25 17:36:10,129 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2022-11-25 17:36:10,129 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3984 transitions. [2022-11-25 17:36:10,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3984 transitions. [2022-11-25 17:36:10,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:10,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3984 transitions. [2022-11-25 17:36:10,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 332.0) internal successors, (3984), 12 states have internal predecessors, (3984), 0 states have call successors, (0), 0 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 17:36:10,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 774.0) internal successors, (10062), 13 states have internal predecessors, (10062), 0 states have call successors, (0), 0 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 17:36:10,160 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 774.0) internal successors, (10062), 13 states have internal predecessors, (10062), 0 states have call successors, (0), 0 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 17:36:10,161 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 336 flow. Second operand 12 states and 3984 transitions. [2022-11-25 17:36:10,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 408 transitions, 2052 flow [2022-11-25 17:36:10,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 408 transitions, 2046 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 17:36:10,171 INFO L231 Difference]: Finished difference. Result has 92 places, 104 transitions, 621 flow [2022-11-25 17:36:10,172 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=621, PETRI_PLACES=92, PETRI_TRANSITIONS=104} [2022-11-25 17:36:10,173 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2022-11-25 17:36:10,173 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 104 transitions, 621 flow [2022-11-25 17:36:10,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 298.0) internal successors, (3576), 12 states have internal predecessors, (3576), 0 states have call successors, (0), 0 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 17:36:10,174 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:10,175 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:36:10,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:36:10,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:36:10,383 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-25 17:36:10,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:10,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1623664188, now seen corresponding path program 1 times [2022-11-25 17:36:10,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:36:10,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228825053] [2022-11-25 17:36:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:10,384 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 17:36:10,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:36:10,385 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:36:10,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:36:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:10,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:36:10,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:36:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:36:10,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:36:10,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:36:10,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228825053] [2022-11-25 17:36:10,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228825053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:10,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:10,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:36:10,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740325630] [2022-11-25 17:36:10,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:10,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:36:10,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:36:10,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:36:10,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:36:11,012 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 774 [2022-11-25 17:36:11,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 621 flow. Second operand has 5 states, 5 states have (on average 308.4) internal successors, (1542), 5 states have internal predecessors, (1542), 0 states have call successors, (0), 0 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 17:36:11,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:11,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 774 [2022-11-25 17:36:11,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:21,248 INFO L130 PetriNetUnfolder]: 46162/66402 cut-off events. [2022-11-25 17:36:21,248 INFO L131 PetriNetUnfolder]: For 1714/1714 co-relation queries the response was YES. [2022-11-25 17:36:21,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142439 conditions, 66402 events. 46162/66402 cut-off events. For 1714/1714 co-relation queries the response was YES. Maximal size of possible extension queue 2601. Compared 458657 event pairs, 23030 based on Foata normal form. 805/27612 useless extension candidates. Maximal degree in co-relation 142412. Up to 28905 conditions per place. [2022-11-25 17:36:21,687 INFO L137 encePairwiseOnDemand]: 760/774 looper letters, 190 selfloop transitions, 15 changer transitions 0/205 dead transitions. [2022-11-25 17:36:21,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 205 transitions, 1353 flow [2022-11-25 17:36:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:36:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:36:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1697 transitions. [2022-11-25 17:36:21,690 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4385012919896641 [2022-11-25 17:36:21,690 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1697 transitions. [2022-11-25 17:36:21,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1697 transitions. [2022-11-25 17:36:21,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:21,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1697 transitions. [2022-11-25 17:36:21,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 339.4) internal successors, (1697), 5 states have internal predecessors, (1697), 0 states have call successors, (0), 0 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 17:36:21,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 774.0) internal successors, (4644), 6 states have internal predecessors, (4644), 0 states have call successors, (0), 0 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 17:36:21,699 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 774.0) internal successors, (4644), 6 states have internal predecessors, (4644), 0 states have call successors, (0), 0 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 17:36:21,699 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 621 flow. Second operand 5 states and 1697 transitions. [2022-11-25 17:36:21,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 205 transitions, 1353 flow [2022-11-25 17:36:21,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 205 transitions, 1245 flow, removed 25 selfloop flow, removed 4 redundant places. [2022-11-25 17:36:21,714 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 598 flow [2022-11-25 17:36:21,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=598, PETRI_PLACES=94, PETRI_TRANSITIONS=105} [2022-11-25 17:36:21,715 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2022-11-25 17:36:21,715 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 598 flow [2022-11-25 17:36:21,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 308.4) internal successors, (1542), 5 states have internal predecessors, (1542), 0 states have call successors, (0), 0 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 17:36:21,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:21,716 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:36:21,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:36:21,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:36:21,935 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-25 17:36:21,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:21,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1821987144, now seen corresponding path program 1 times [2022-11-25 17:36:21,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:36:21,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135610456] [2022-11-25 17:36:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:21,936 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 17:36:21,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:36:21,938 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:36:21,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:36:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:22,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:36:22,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:36:22,298 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-25 17:36:22,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-25 17:36:22,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:36:22,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:36:22,425 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:36:22,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:36:22,506 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 17:36:22,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:36:22,507 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:36:22,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135610456] [2022-11-25 17:36:22,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135610456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:22,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:22,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:36:22,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967357781] [2022-11-25 17:36:22,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:22,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:36:22,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:36:22,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:36:22,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:36:23,547 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 774 [2022-11-25 17:36:23,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 105 transitions, 598 flow. Second operand has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 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 17:36:23,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:23,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 774 [2022-11-25 17:36:23,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:33,089 INFO L130 PetriNetUnfolder]: 43901/62951 cut-off events. [2022-11-25 17:36:33,089 INFO L131 PetriNetUnfolder]: For 5676/5676 co-relation queries the response was YES. [2022-11-25 17:36:33,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144767 conditions, 62951 events. 43901/62951 cut-off events. For 5676/5676 co-relation queries the response was YES. Maximal size of possible extension queue 2529. Compared 426119 event pairs, 34027 based on Foata normal form. 0/27552 useless extension candidates. Maximal degree in co-relation 144737. Up to 62951 conditions per place. [2022-11-25 17:36:33,668 INFO L137 encePairwiseOnDemand]: 771/774 looper letters, 102 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2022-11-25 17:36:33,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 103 transitions, 800 flow [2022-11-25 17:36:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:36:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:36:33,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 996 transitions. [2022-11-25 17:36:33,672 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2022-11-25 17:36:33,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 996 transitions. [2022-11-25 17:36:33,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 996 transitions. [2022-11-25 17:36:33,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:33,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 996 transitions. [2022-11-25 17:36:33,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.0) internal successors, (996), 3 states have internal predecessors, (996), 0 states have call successors, (0), 0 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 17:36:33,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 17:36:33,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 17:36:33,679 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 598 flow. Second operand 3 states and 996 transitions. [2022-11-25 17:36:33,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 103 transitions, 800 flow [2022-11-25 17:36:33,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 103 transitions, 794 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 17:36:33,697 INFO L231 Difference]: Finished difference. Result has 93 places, 103 transitions, 590 flow [2022-11-25 17:36:33,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=590, PETRI_PLACES=93, PETRI_TRANSITIONS=103} [2022-11-25 17:36:33,699 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 19 predicate places. [2022-11-25 17:36:33,699 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 103 transitions, 590 flow [2022-11-25 17:36:33,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 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 17:36:33,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:33,700 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:36:33,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:36:33,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:36:33,915 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-25 17:36:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:33,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1231896600, now seen corresponding path program 1 times [2022-11-25 17:36:33,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:36:33,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936985983] [2022-11-25 17:36:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:33,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:36:33,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:36:33,918 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:36:33,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:36:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:34,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:36:34,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:36:34,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 17:36:34,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 17:36:34,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:36:34,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:36:34,377 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 17:36:34,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 17:36:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:36:34,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:36:37,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:36:37,196 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 55 treesize of output 62 [2022-11-25 17:36:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:36:37,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:36:37,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936985983] [2022-11-25 17:36:37,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936985983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:36:37,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:36:37,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:36:37,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193224468] [2022-11-25 17:36:37,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:36:37,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:36:37,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:36:37,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:36:37,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:36:50,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 774 [2022-11-25 17:36:50,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 103 transitions, 590 flow. Second operand has 10 states, 10 states have (on average 280.6) internal successors, (2806), 10 states have internal predecessors, (2806), 0 states have call successors, (0), 0 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 17:36:50,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:50,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 774 [2022-11-25 17:36:50,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:10,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:37:35,863 INFO L130 PetriNetUnfolder]: 84673/121590 cut-off events. [2022-11-25 17:37:35,864 INFO L131 PetriNetUnfolder]: For 10290/10290 co-relation queries the response was YES. [2022-11-25 17:37:36,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277308 conditions, 121590 events. 84673/121590 cut-off events. For 10290/10290 co-relation queries the response was YES. Maximal size of possible extension queue 4704. Compared 897428 event pairs, 53409 based on Foata normal form. 0/53686 useless extension candidates. Maximal degree in co-relation 277277. Up to 22656 conditions per place. [2022-11-25 17:37:36,699 INFO L137 encePairwiseOnDemand]: 760/774 looper letters, 745 selfloop transitions, 71 changer transitions 0/816 dead transitions. [2022-11-25 17:37:36,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 816 transitions, 4356 flow [2022-11-25 17:37:36,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 17:37:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-25 17:37:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 7221 transitions. [2022-11-25 17:37:36,713 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40562858105830807 [2022-11-25 17:37:36,713 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 7221 transitions. [2022-11-25 17:37:36,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 7221 transitions. [2022-11-25 17:37:36,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:36,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 7221 transitions. [2022-11-25 17:37:36,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 313.95652173913044) internal successors, (7221), 23 states have internal predecessors, (7221), 0 states have call successors, (0), 0 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 17:37:36,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 774.0) internal successors, (18576), 24 states have internal predecessors, (18576), 0 states have call successors, (0), 0 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 17:37:36,760 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 774.0) internal successors, (18576), 24 states have internal predecessors, (18576), 0 states have call successors, (0), 0 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 17:37:36,761 INFO L175 Difference]: Start difference. First operand has 93 places, 103 transitions, 590 flow. Second operand 23 states and 7221 transitions. [2022-11-25 17:37:36,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 816 transitions, 4356 flow [2022-11-25 17:37:36,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 816 transitions, 4355 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:37:36,810 INFO L231 Difference]: Finished difference. Result has 130 places, 137 transitions, 1062 flow [2022-11-25 17:37:36,810 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1062, PETRI_PLACES=130, PETRI_TRANSITIONS=137} [2022-11-25 17:37:36,811 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 56 predicate places. [2022-11-25 17:37:36,811 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 137 transitions, 1062 flow [2022-11-25 17:37:36,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 280.6) internal successors, (2806), 10 states have internal predecessors, (2806), 0 states have call successors, (0), 0 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 17:37:36,812 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:36,812 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:36,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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)] Ended with exit code 0 [2022-11-25 17:37:37,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:37:37,035 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-25 17:37:37,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:37,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1231896718, now seen corresponding path program 1 times [2022-11-25 17:37:37,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:37:37,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461034263] [2022-11-25 17:37:37,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:37,036 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 17:37:37,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:37:37,037 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:37:37,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_524fb794-37ad-4b46-aa88-a8f979b6723b/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 17:37:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:37,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:37:37,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:37,363 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:37:37,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 17:37:37,409 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 17:37:37,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 17:37:37,444 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:37:37,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:37:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:37:37,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:37:37,466 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:37:37,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461034263] [2022-11-25 17:37:37,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461034263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:37,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:37,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:37:37,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857851089] [2022-11-25 17:37:37,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:37,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:37:37,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:37:37,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:37:37,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:37:37,983 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 774 [2022-11-25 17:37:37,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 137 transitions, 1062 flow. Second operand has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 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 17:37:37,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:37,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 774 [2022-11-25 17:37:37,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand