./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS --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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- 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-4e7fbc6 [2022-11-23 03:23:08,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:23:08,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:23:08,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:23:08,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:23:08,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:23:08,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:23:08,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:23:09,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:23:09,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:23:09,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:23:09,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:23:09,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:23:09,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:23:09,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:23:09,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:23:09,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:23:09,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:23:09,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:23:09,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:23:09,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:23:09,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:23:09,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:23:09,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:23:09,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:23:09,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:23:09,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:23:09,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:23:09,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:23:09,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:23:09,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:23:09,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:23:09,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:23:09,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:23:09,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:23:09,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:23:09,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:23:09,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:23:09,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:23:09,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:23:09,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:23:09,075 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 03:23:09,149 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:23:09,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:23:09,151 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:23:09,151 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:23:09,152 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:23:09,153 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:23:09,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:23:09,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:23:09,154 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:23:09,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:23:09,156 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:23:09,156 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:23:09,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:23:09,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:23:09,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:23:09,158 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:23:09,158 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:23:09,158 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:23:09,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:23:09,159 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:23:09,159 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:23:09,160 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:23:09,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:23:09,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:23:09,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:23:09,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:23:09,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:23:09,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:23:09,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:23:09,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:23:09,163 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:23:09,164 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:23:09,164 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:23:09,164 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_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-11-23 03:23:09,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:23:09,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:23:09,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:23:09,524 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:23:09,524 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:23:09,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-23 03:23:13,008 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:23:13,285 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:23:13,289 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-23 03:23:13,298 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/data/7fe8adebf/9e79d3a1661f4b65bf54331f7e3c652c/FLAGaa257c172 [2022-11-23 03:23:13,317 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/data/7fe8adebf/9e79d3a1661f4b65bf54331f7e3c652c [2022-11-23 03:23:13,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:23:13,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:23:13,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:23:13,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:23:13,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:23:13,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:23:13" (1/1) ... [2022-11-23 03:23:13,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7465f596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:13, skipping insertion in model container [2022-11-23 03:23:13,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:23:13" (1/1) ... [2022-11-23 03:23:13,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:23:13,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:23:13,617 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-23 03:23:13,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:23:13,649 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) [2022-11-23 03:23:13,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@18150759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:13, skipping insertion in model container [2022-11-23 03:23:13,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:23:13,651 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 03:23:13,653 INFO L158 Benchmark]: Toolchain (without parser) took 329.56ms. Allocated memory is still 167.8MB. Free memory was 138.5MB in the beginning and 132.3MB in the end (delta: 6.2MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. [2022-11-23 03:23:13,654 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 125.8MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 03:23:13,655 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.97ms. Allocated memory is still 167.8MB. Free memory was 138.3MB in the beginning and 132.3MB in the end (delta: 6.0MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. [2022-11-23 03:23:13,657 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 125.8MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 325.97ms. Allocated memory is still 167.8MB. Free memory was 138.3MB in the beginning and 132.3MB in the end (delta: 6.0MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 90]: 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_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS --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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- 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-4e7fbc6 [2022-11-23 03:23:16,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:23:16,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:23:16,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:23:16,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:23:16,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:23:16,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:23:16,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:23:16,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:23:16,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:23:16,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:23:16,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:23:16,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:23:16,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:23:16,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:23:16,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:23:16,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:23:16,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:23:16,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:23:16,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:23:16,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:23:16,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:23:16,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:23:16,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:23:16,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:23:16,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:23:16,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:23:16,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:23:16,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:23:16,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:23:16,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:23:16,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:23:16,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:23:16,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:23:16,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:23:16,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:23:16,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:23:16,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:23:16,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:23:16,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:23:16,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:23:16,741 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-23 03:23:16,783 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:23:16,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:23:16,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:23:16,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:23:16,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:23:16,787 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:23:16,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:23:16,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:23:16,788 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:23:16,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:23:16,790 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:23:16,790 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:23:16,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:23:16,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:23:16,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:23:16,791 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:23:16,791 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:23:16,791 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:23:16,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:23:16,792 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:23:16,792 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 03:23:16,792 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 03:23:16,793 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:23:16,793 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:23:16,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:23:16,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:23:16,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:23:16,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:23:16,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:23:16,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:23:16,794 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-23 03:23:16,795 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 03:23:16,795 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:23:16,795 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:23:16,796 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:23:16,796 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-23 03:23:16,796 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_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-11-23 03:23:17,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:23:17,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:23:17,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:23:17,281 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:23:17,281 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:23:17,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-23 03:23:20,804 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:23:21,111 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:23:21,112 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-23 03:23:21,127 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/data/800e1f2a0/213e4a3f1aa44f38b6cce77d71bdfd20/FLAGafa0b2f21 [2022-11-23 03:23:21,160 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/data/800e1f2a0/213e4a3f1aa44f38b6cce77d71bdfd20 [2022-11-23 03:23:21,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:23:21,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:23:21,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:23:21,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:23:21,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:23:21,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:23:21" (1/1) ... [2022-11-23 03:23:21,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@763029e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:21, skipping insertion in model container [2022-11-23 03:23:21,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:23:21" (1/1) ... [2022-11-23 03:23:21,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:23:21,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:23:21,530 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_0d67c021-fffd-4d43-b335-17c96de51304/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-23 03:23:21,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:23:21,586 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 03:23:21,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:23:21,624 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_0d67c021-fffd-4d43-b335-17c96de51304/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-23 03:23:21,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:23:21,652 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:23:21,695 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_0d67c021-fffd-4d43-b335-17c96de51304/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-23 03:23:21,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:23:21,731 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:23:21,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:21 WrapperNode [2022-11-23 03:23:21,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:23:21,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:23:21,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:23:21,735 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:23:21,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:21" (1/1) ... [2022-11-23 03:23:21,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:21" (1/1) ... [2022-11-23 03:23:21,825 INFO L138 Inliner]: procedures = 28, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 134 [2022-11-23 03:23:21,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:23:21,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:23:21,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:23:21,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:23:21,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:21" (1/1) ... [2022-11-23 03:23:21,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:21" (1/1) ... [2022-11-23 03:23:21,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:21" (1/1) ... [2022-11-23 03:23:21,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:21" (1/1) ... [2022-11-23 03:23:21,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:21" (1/1) ... [2022-11-23 03:23:21,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:21" (1/1) ... [2022-11-23 03:23:21,896 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:21" (1/1) ... [2022-11-23 03:23:21,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:21" (1/1) ... [2022-11-23 03:23:21,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:23:21,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:23:21,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:23:21,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:23:21,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:21" (1/1) ... [2022-11-23 03:23:21,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:23:21,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:23:21,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:23:21,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:23:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:23:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 03:23:22,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:23:22,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 03:23:22,012 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 03:23:22,012 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 03:23:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 03:23:22,013 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 03:23:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 03:23:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 03:23:22,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:23:22,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:23:22,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:23:22,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:23:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 03:23:22,016 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:23:22,134 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:23:22,137 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:23:22,769 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:23:22,967 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:23:22,968 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 03:23:22,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:23:22 BoogieIcfgContainer [2022-11-23 03:23:22,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:23:22,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:23:22,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:23:22,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:23:22,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:23:21" (1/3) ... [2022-11-23 03:23:22,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6753b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:23:22, skipping insertion in model container [2022-11-23 03:23:22,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:23:21" (2/3) ... [2022-11-23 03:23:22,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6753b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:23:22, skipping insertion in model container [2022-11-23 03:23:22,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:23:22" (3/3) ... [2022-11-23 03:23:22,980 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2022-11-23 03:23:23,015 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:23:23,016 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-23 03:23:23,016 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:23:23,114 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 03:23:23,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 133 transitions, 282 flow [2022-11-23 03:23:23,302 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2022-11-23 03:23:23,302 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:23:23,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 9/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 120 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2022-11-23 03:23:23,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 133 transitions, 282 flow [2022-11-23 03:23:23,317 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 126 transitions, 264 flow [2022-11-23 03:23:23,322 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:23:23,349 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 126 transitions, 264 flow [2022-11-23 03:23:23,355 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 126 transitions, 264 flow [2022-11-23 03:23:23,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 126 transitions, 264 flow [2022-11-23 03:23:23,428 INFO L130 PetriNetUnfolder]: 9/126 cut-off events. [2022-11-23 03:23:23,429 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:23:23,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 9/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 120 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2022-11-23 03:23:23,434 INFO L119 LiptonReduction]: Number of co-enabled transitions 840 [2022-11-23 03:23:45,356 INFO L134 LiptonReduction]: Checked pairs total: 1092 [2022-11-23 03:23:45,356 INFO L136 LiptonReduction]: Total number of compositions: 124 [2022-11-23 03:23:45,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:23:45,381 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;@7663be68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:23:45,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-23 03:23:45,385 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-23 03:23:45,385 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:23:45,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:45,387 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:23:45,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:23:45,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:45,394 INFO L85 PathProgramCache]: Analyzing trace with hash 19672, now seen corresponding path program 1 times [2022-11-23 03:23:45,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:23:45,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813450240] [2022-11-23 03:23:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:45,411 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 [2022-11-23 03:23:45,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:23:45,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:23:45,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:45,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 03:23:45,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:45,781 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 03:23:45,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 03:23:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:45,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:23:45,822 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:23:45,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813450240] [2022-11-23 03:23:45,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813450240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:23:45,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:23:45,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:23:45,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373969173] [2022-11-23 03:23:45,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:23:45,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:23:45,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:23:45,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:23:45,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:23:46,019 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 257 [2022-11-23 03:23:46,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:46,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:23:46,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 257 [2022-11-23 03:23:46,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:23:46,290 INFO L130 PetriNetUnfolder]: 327/474 cut-off events. [2022-11-23 03:23:46,290 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-23 03:23:46,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 474 events. 327/474 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 1870 event pairs, 149 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 831. Up to 469 conditions per place. [2022-11-23 03:23:46,297 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-11-23 03:23:46,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 128 flow [2022-11-23 03:23:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:23:46,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:23:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2022-11-23 03:23:46,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48249027237354086 [2022-11-23 03:23:46,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2022-11-23 03:23:46,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2022-11-23 03:23:46,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:23:46,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2022-11-23 03:23:46,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:46,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:46,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:46,337 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 372 transitions. [2022-11-23 03:23:46,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 128 flow [2022-11-23 03:23:46,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 03:23:46,343 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 66 flow [2022-11-23 03:23:46,345 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2022-11-23 03:23:46,349 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2022-11-23 03:23:46,350 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 66 flow [2022-11-23 03:23:46,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:46,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:46,351 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:23:46,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:23:46,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:23:46,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:23:46,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:46,553 INFO L85 PathProgramCache]: Analyzing trace with hash 19673, now seen corresponding path program 1 times [2022-11-23 03:23:46,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:23:46,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172713900] [2022-11-23 03:23:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:46,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:23:46,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:23:46,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:23:46,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:46,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 03:23:46,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:46,822 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:23:46,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:23:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:46,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:23:46,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:23:46,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172713900] [2022-11-23 03:23:46,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172713900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:23:46,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:23:46,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:23:46,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808769940] [2022-11-23 03:23:46,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:23:46,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:23:46,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:23:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:23:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:23:47,062 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 257 [2022-11-23 03:23:47,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:47,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:23:47,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 257 [2022-11-23 03:23:47,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:23:47,577 INFO L130 PetriNetUnfolder]: 643/936 cut-off events. [2022-11-23 03:23:47,577 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:23:47,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1877 conditions, 936 events. 643/936 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 4306 event pairs, 295 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 1871. Up to 467 conditions per place. [2022-11-23 03:23:47,589 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 52 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2022-11-23 03:23:47,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 56 transitions, 230 flow [2022-11-23 03:23:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:23:47,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:23:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2022-11-23 03:23:47,596 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5149156939040207 [2022-11-23 03:23:47,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2022-11-23 03:23:47,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2022-11-23 03:23:47,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:23:47,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2022-11-23 03:23:47,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:47,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:47,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:47,602 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 66 flow. Second operand 3 states and 397 transitions. [2022-11-23 03:23:47,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 56 transitions, 230 flow [2022-11-23 03:23:47,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 56 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:23:47,604 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 77 flow [2022-11-23 03:23:47,604 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2022-11-23 03:23:47,605 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2022-11-23 03:23:47,605 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 77 flow [2022-11-23 03:23:47,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:47,606 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:47,606 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:23:47,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:47,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:23:47,811 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:23:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash 19731, now seen corresponding path program 1 times [2022-11-23 03:23:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:23:47,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162055247] [2022-11-23 03:23:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:47,813 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 [2022-11-23 03:23:47,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:23:47,823 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:23:47,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:47,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 03:23:47,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:47,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:23:47,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:23:48,013 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:23:48,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-23 03:23:48,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 03:23:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:48,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:23:48,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:23:48,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162055247] [2022-11-23 03:23:48,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162055247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:23:48,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:23:48,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:23:48,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980017797] [2022-11-23 03:23:48,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:23:48,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:23:48,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:23:48,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:23:48,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:23:48,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 257 [2022-11-23 03:23:48,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:48,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:23:48,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 257 [2022-11-23 03:23:48,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:23:48,729 INFO L130 PetriNetUnfolder]: 501/742 cut-off events. [2022-11-23 03:23:48,729 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:23:48,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1496 conditions, 742 events. 501/742 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 3309 event pairs, 226 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 1488. Up to 732 conditions per place. [2022-11-23 03:23:48,736 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 26 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2022-11-23 03:23:48,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 127 flow [2022-11-23 03:23:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:23:48,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:23:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2022-11-23 03:23:48,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4798962386511025 [2022-11-23 03:23:48,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2022-11-23 03:23:48,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2022-11-23 03:23:48,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:23:48,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2022-11-23 03:23:48,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:48,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:48,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:48,745 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 77 flow. Second operand 3 states and 370 transitions. [2022-11-23 03:23:48,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 127 flow [2022-11-23 03:23:48,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 125 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:23:48,749 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 73 flow [2022-11-23 03:23:48,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2022-11-23 03:23:48,754 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2022-11-23 03:23:48,755 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 73 flow [2022-11-23 03:23:48,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:48,756 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:48,756 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:23:48,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:48,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:23:48,971 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:23:48,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:48,972 INFO L85 PathProgramCache]: Analyzing trace with hash 19733, now seen corresponding path program 1 times [2022-11-23 03:23:48,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:23:48,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42285642] [2022-11-23 03:23:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:48,973 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 [2022-11-23 03:23:48,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:23:48,974 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:23:48,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:23:49,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:49,112 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-23 03:23:49,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-23 03:23:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:49,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:23:49,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:23:49,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42285642] [2022-11-23 03:23:49,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42285642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:23:49,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:23:49,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:23:49,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241556618] [2022-11-23 03:23:49,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:23:49,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:23:49,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:23:49,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:23:49,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:23:49,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 257 [2022-11-23 03:23:49,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:49,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:23:49,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 257 [2022-11-23 03:23:49,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:23:49,533 INFO L130 PetriNetUnfolder]: 349/538 cut-off events. [2022-11-23 03:23:49,533 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:23:49,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1088 conditions, 538 events. 349/538 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2362 event pairs, 154 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 1079. Up to 528 conditions per place. [2022-11-23 03:23:49,537 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 24 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2022-11-23 03:23:49,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 119 flow [2022-11-23 03:23:49,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:23:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:23:49,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2022-11-23 03:23:49,540 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4656290531776913 [2022-11-23 03:23:49,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2022-11-23 03:23:49,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2022-11-23 03:23:49,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:23:49,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2022-11-23 03:23:49,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:49,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:49,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:49,546 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 73 flow. Second operand 3 states and 359 transitions. [2022-11-23 03:23:49,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 119 flow [2022-11-23 03:23:49,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 118 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:23:49,547 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 70 flow [2022-11-23 03:23:49,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2022-11-23 03:23:49,549 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2022-11-23 03:23:49,549 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 70 flow [2022-11-23 03:23:49,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:49,550 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:49,550 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 03:23:49,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:49,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:23:49,765 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:23:49,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:49,765 INFO L85 PathProgramCache]: Analyzing trace with hash 612052, now seen corresponding path program 1 times [2022-11-23 03:23:49,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:23:49,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941803334] [2022-11-23 03:23:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:49,766 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 [2022-11-23 03:23:49,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:23:49,770 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:23:49,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:49,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 03:23:49,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:49,971 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:23:49,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:23:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:50,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:23:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:50,406 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:23:50,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941803334] [2022-11-23 03:23:50,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941803334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:23:50,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:23:50,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-23 03:23:50,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581195382] [2022-11-23 03:23:50,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:23:50,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:23:50,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:23:50,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:23:50,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:23:51,260 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 257 [2022-11-23 03:23:51,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 70 flow. Second operand has 6 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:51,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:23:51,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 257 [2022-11-23 03:23:51,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:23:52,022 INFO L130 PetriNetUnfolder]: 509/794 cut-off events. [2022-11-23 03:23:52,022 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 03:23:52,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 794 events. 509/794 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 3839 event pairs, 229 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 1593. Up to 263 conditions per place. [2022-11-23 03:23:52,029 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 65 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2022-11-23 03:23:52,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 74 transitions, 322 flow [2022-11-23 03:23:52,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:23:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:23:52,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 729 transitions. [2022-11-23 03:23:52,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4727626459143969 [2022-11-23 03:23:52,034 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 729 transitions. [2022-11-23 03:23:52,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 729 transitions. [2022-11-23 03:23:52,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:23:52,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 729 transitions. [2022-11-23 03:23:52,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 121.5) internal successors, (729), 6 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:52,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 257.0) internal successors, (1799), 7 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:52,044 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 257.0) internal successors, (1799), 7 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:52,044 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 70 flow. Second operand 6 states and 729 transitions. [2022-11-23 03:23:52,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 74 transitions, 322 flow [2022-11-23 03:23:52,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 74 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:23:52,047 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 123 flow [2022-11-23 03:23:52,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=123, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2022-11-23 03:23:52,048 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2022-11-23 03:23:52,049 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 123 flow [2022-11-23 03:23:52,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:52,050 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:52,050 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-23 03:23:52,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:52,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:23:52,266 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:23:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:52,267 INFO L85 PathProgramCache]: Analyzing trace with hash 18977311, now seen corresponding path program 1 times [2022-11-23 03:23:52,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:23:52,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14571127] [2022-11-23 03:23:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:52,268 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 [2022-11-23 03:23:52,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:23:52,269 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:23:52,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:52,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 03:23:52,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:52,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:23:52,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:23:52,438 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:23:52,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-23 03:23:52,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-23 03:23:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:52,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:23:52,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:23:52,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14571127] [2022-11-23 03:23:52,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14571127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:23:52,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:23:52,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:23:52,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911983879] [2022-11-23 03:23:52,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:23:52,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:23:52,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:23:52,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:23:52,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:23:52,622 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 257 [2022-11-23 03:23:52,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:52,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:23:52,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 257 [2022-11-23 03:23:52,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:23:52,866 INFO L130 PetriNetUnfolder]: 480/735 cut-off events. [2022-11-23 03:23:52,866 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-23 03:23:52,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1513 conditions, 735 events. 480/735 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 3414 event pairs, 210 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 1498. Up to 720 conditions per place. [2022-11-23 03:23:52,873 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-11-23 03:23:52,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 30 transitions, 175 flow [2022-11-23 03:23:52,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:23:52,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:23:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2022-11-23 03:23:52,876 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47470817120622566 [2022-11-23 03:23:52,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2022-11-23 03:23:52,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2022-11-23 03:23:52,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:23:52,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2022-11-23 03:23:52,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:52,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:52,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:52,882 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 123 flow. Second operand 3 states and 366 transitions. [2022-11-23 03:23:52,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 30 transitions, 175 flow [2022-11-23 03:23:52,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 30 transitions, 165 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-23 03:23:52,889 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 111 flow [2022-11-23 03:23:52,890 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2022-11-23 03:23:52,894 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2022-11-23 03:23:52,894 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 111 flow [2022-11-23 03:23:52,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:52,895 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:52,895 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-23 03:23:52,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:53,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:23:53,122 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:23:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:53,124 INFO L85 PathProgramCache]: Analyzing trace with hash 18977310, now seen corresponding path program 1 times [2022-11-23 03:23:53,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:23:53,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696296173] [2022-11-23 03:23:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:53,130 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 [2022-11-23 03:23:53,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:23:53,133 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:23:53,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:53,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 03:23:53,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:53,309 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-23 03:23:53,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2022-11-23 03:23:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:53,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:23:53,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:23:53,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696296173] [2022-11-23 03:23:53,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696296173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:23:53,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:23:53,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:23:53,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122381179] [2022-11-23 03:23:53,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:23:53,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:23:53,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:23:53,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:23:53,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:23:53,475 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 257 [2022-11-23 03:23:53,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:53,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:23:53,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 257 [2022-11-23 03:23:53,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:23:53,741 INFO L130 PetriNetUnfolder]: 435/660 cut-off events. [2022-11-23 03:23:53,742 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-23 03:23:53,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 conditions, 660 events. 435/660 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 2954 event pairs, 189 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 1344. Up to 645 conditions per place. [2022-11-23 03:23:53,748 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 25 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2022-11-23 03:23:53,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 28 transitions, 159 flow [2022-11-23 03:23:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:23:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:23:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2022-11-23 03:23:53,751 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4604409857328145 [2022-11-23 03:23:53,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2022-11-23 03:23:53,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2022-11-23 03:23:53,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:23:53,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2022-11-23 03:23:53,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:53,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:53,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:53,757 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 111 flow. Second operand 3 states and 355 transitions. [2022-11-23 03:23:53,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 28 transitions, 159 flow [2022-11-23 03:23:53,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 28 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:23:53,761 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 108 flow [2022-11-23 03:23:53,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2022-11-23 03:23:53,764 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2022-11-23 03:23:53,764 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 108 flow [2022-11-23 03:23:53,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:53,766 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:53,766 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 03:23:53,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-23 03:23:53,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:23:53,981 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:23:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash 588292996, now seen corresponding path program 1 times [2022-11-23 03:23:53,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:23:53,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070287427] [2022-11-23 03:23:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:53,982 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 [2022-11-23 03:23:53,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:23:53,983 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:23:53,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:54,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:23:54,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:54,139 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 03:23:54,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 03:23:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:54,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:23:54,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:23:54,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070287427] [2022-11-23 03:23:54,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070287427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:23:54,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:23:54,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:23:54,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605022565] [2022-11-23 03:23:54,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:23:54,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:23:54,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:23:54,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:23:54,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:23:54,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 257 [2022-11-23 03:23:54,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:54,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:23:54,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 257 [2022-11-23 03:23:54,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:23:54,734 INFO L130 PetriNetUnfolder]: 273/432 cut-off events. [2022-11-23 03:23:54,734 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-23 03:23:54,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 432 events. 273/432 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1803 event pairs, 114 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 888. Up to 413 conditions per place. [2022-11-23 03:23:54,738 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 20 selfloop transitions, 4 changer transitions 0/26 dead transitions. [2022-11-23 03:23:54,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 26 transitions, 152 flow [2022-11-23 03:23:54,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:23:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:23:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 460 transitions. [2022-11-23 03:23:54,741 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4474708171206226 [2022-11-23 03:23:54,742 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 460 transitions. [2022-11-23 03:23:54,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 460 transitions. [2022-11-23 03:23:54,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:23:54,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 460 transitions. [2022-11-23 03:23:54,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:54,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:54,748 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:54,748 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 108 flow. Second operand 4 states and 460 transitions. [2022-11-23 03:23:54,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 26 transitions, 152 flow [2022-11-23 03:23:54,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 26 transitions, 151 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:23:54,750 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 111 flow [2022-11-23 03:23:54,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2022-11-23 03:23:54,751 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2022-11-23 03:23:54,752 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 111 flow [2022-11-23 03:23:54,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:54,752 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:54,753 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 03:23:54,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-23 03:23:54,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:23:54,977 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:23:54,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:54,977 INFO L85 PathProgramCache]: Analyzing trace with hash 588292997, now seen corresponding path program 1 times [2022-11-23 03:23:54,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:23:54,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584827694] [2022-11-23 03:23:54,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:54,978 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 [2022-11-23 03:23:54,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:23:54,980 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:23:54,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:55,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 03:23:55,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:55,184 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:23:55,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:23:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:55,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:23:55,313 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:23:55,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584827694] [2022-11-23 03:23:55,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584827694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:23:55,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:23:55,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:23:55,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022863007] [2022-11-23 03:23:55,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:23:55,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:23:55,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:23:55,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:23:55,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:23:55,785 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 257 [2022-11-23 03:23:55,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:55,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:23:55,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 257 [2022-11-23 03:23:55,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:23:56,176 INFO L130 PetriNetUnfolder]: 372/621 cut-off events. [2022-11-23 03:23:56,176 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-23 03:23:56,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 621 events. 372/621 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 2902 event pairs, 87 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 1283. Up to 377 conditions per place. [2022-11-23 03:23:56,180 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 31 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2022-11-23 03:23:56,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 212 flow [2022-11-23 03:23:56,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:23:56,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:23:56,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 577 transitions. [2022-11-23 03:23:56,183 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4490272373540856 [2022-11-23 03:23:56,183 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 577 transitions. [2022-11-23 03:23:56,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 577 transitions. [2022-11-23 03:23:56,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:23:56,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 577 transitions. [2022-11-23 03:23:56,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.4) internal successors, (577), 5 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:56,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 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) [2022-11-23 03:23:56,188 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 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) [2022-11-23 03:23:56,188 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 111 flow. Second operand 5 states and 577 transitions. [2022-11-23 03:23:56,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 212 flow [2022-11-23 03:23:56,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:23:56,190 INFO L231 Difference]: Finished difference. Result has 41 places, 27 transitions, 126 flow [2022-11-23 03:23:56,190 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=41, PETRI_TRANSITIONS=27} [2022-11-23 03:23:56,191 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2022-11-23 03:23:56,191 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 27 transitions, 126 flow [2022-11-23 03:23:56,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:56,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:56,192 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 03:23:56,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:56,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:23:56,404 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:23:56,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:56,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1057215845, now seen corresponding path program 1 times [2022-11-23 03:23:56,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:23:56,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624943823] [2022-11-23 03:23:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:56,405 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 [2022-11-23 03:23:56,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:23:56,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:23:56,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:56,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 03:23:56,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:56,595 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:23:56,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:23:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:56,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:23:56,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:23:56,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624943823] [2022-11-23 03:23:56,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624943823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:23:56,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:23:56,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:23:56,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194704111] [2022-11-23 03:23:56,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:23:56,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:23:56,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:23:56,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:23:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:23:57,226 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 257 [2022-11-23 03:23:57,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 27 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:57,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:23:57,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 257 [2022-11-23 03:23:57,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:23:57,672 INFO L130 PetriNetUnfolder]: 251/453 cut-off events. [2022-11-23 03:23:57,672 INFO L131 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-11-23 03:23:57,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 453 events. 251/453 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2027 event pairs, 132 based on Foata normal form. 8/326 useless extension candidates. Maximal degree in co-relation 1042. Up to 385 conditions per place. [2022-11-23 03:23:57,675 INFO L137 encePairwiseOnDemand]: 251/257 looper letters, 40 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2022-11-23 03:23:57,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 265 flow [2022-11-23 03:23:57,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:23:57,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:23:57,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2022-11-23 03:23:57,679 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45603112840466925 [2022-11-23 03:23:57,679 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2022-11-23 03:23:57,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2022-11-23 03:23:57,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:23:57,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2022-11-23 03:23:57,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:57,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 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) [2022-11-23 03:23:57,685 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 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) [2022-11-23 03:23:57,685 INFO L175 Difference]: Start difference. First operand has 41 places, 27 transitions, 126 flow. Second operand 5 states and 586 transitions. [2022-11-23 03:23:57,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 265 flow [2022-11-23 03:23:57,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 252 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:23:57,688 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 151 flow [2022-11-23 03:23:57,688 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2022-11-23 03:23:57,689 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2022-11-23 03:23:57,689 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 151 flow [2022-11-23 03:23:57,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:57,690 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:57,690 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-23 03:23:57,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:57,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:23:57,903 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:23:57,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:57,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1055945625, now seen corresponding path program 2 times [2022-11-23 03:23:57,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:23:57,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889662819] [2022-11-23 03:23:57,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:23:57,904 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 [2022-11-23 03:23:57,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:23:57,906 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:23:57,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:23:57,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:23:57,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:23:58,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 03:23:58,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:58,091 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:23:58,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:23:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:58,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:23:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:59,066 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:23:59,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889662819] [2022-11-23 03:23:59,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889662819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:23:59,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:23:59,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-23 03:23:59,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889728045] [2022-11-23 03:23:59,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:23:59,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:23:59,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:23:59,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:23:59,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:24:02,637 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 257 [2022-11-23 03:24:02,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 151 flow. Second operand has 12 states, 12 states have (on average 111.0) internal successors, (1332), 12 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:02,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:24:02,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 257 [2022-11-23 03:24:02,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:24:06,858 INFO L130 PetriNetUnfolder]: 1025/1767 cut-off events. [2022-11-23 03:24:06,859 INFO L131 PetriNetUnfolder]: For 1019/1098 co-relation queries the response was YES. [2022-11-23 03:24:06,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4575 conditions, 1767 events. 1025/1767 cut-off events. For 1019/1098 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10162 event pairs, 528 based on Foata normal form. 84/1519 useless extension candidates. Maximal degree in co-relation 4553. Up to 379 conditions per place. [2022-11-23 03:24:06,873 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 158 selfloop transitions, 12 changer transitions 0/173 dead transitions. [2022-11-23 03:24:06,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 173 transitions, 972 flow [2022-11-23 03:24:06,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:24:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 03:24:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1487 transitions. [2022-11-23 03:24:06,881 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48216601815823606 [2022-11-23 03:24:06,881 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1487 transitions. [2022-11-23 03:24:06,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1487 transitions. [2022-11-23 03:24:06,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:24:06,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1487 transitions. [2022-11-23 03:24:06,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 123.91666666666667) internal successors, (1487), 12 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:06,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 257.0) internal successors, (3341), 13 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:06,894 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 257.0) internal successors, (3341), 13 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:06,895 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 151 flow. Second operand 12 states and 1487 transitions. [2022-11-23 03:24:06,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 173 transitions, 972 flow [2022-11-23 03:24:06,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 173 transitions, 962 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-23 03:24:06,900 INFO L231 Difference]: Finished difference. Result has 61 places, 36 transitions, 240 flow [2022-11-23 03:24:06,901 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=240, PETRI_PLACES=61, PETRI_TRANSITIONS=36} [2022-11-23 03:24:06,901 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 25 predicate places. [2022-11-23 03:24:06,902 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 36 transitions, 240 flow [2022-11-23 03:24:06,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 111.0) internal successors, (1332), 12 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:06,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:24:06,903 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:24:06,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-23 03:24:07,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:24:07,121 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:24:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:24:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1624151584, now seen corresponding path program 1 times [2022-11-23 03:24:07,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:24:07,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425821074] [2022-11-23 03:24:07,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:24:07,122 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 [2022-11-23 03:24:07,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:24:07,123 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:24:07,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:24:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:07,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 03:24:07,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:24:07,323 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:24:07,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:24:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:24:07,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:24:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:24:08,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:24:08,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425821074] [2022-11-23 03:24:08,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425821074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:24:08,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:24:08,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-23 03:24:08,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096132088] [2022-11-23 03:24:08,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:24:08,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:24:08,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:24:08,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:24:08,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:24:10,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 257 [2022-11-23 03:24:10,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 36 transitions, 240 flow. Second operand has 10 states, 10 states have (on average 108.4) internal successors, (1084), 10 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:10,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:24:10,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 257 [2022-11-23 03:24:10,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:24:12,145 INFO L130 PetriNetUnfolder]: 2069/3294 cut-off events. [2022-11-23 03:24:12,145 INFO L131 PetriNetUnfolder]: For 1590/1620 co-relation queries the response was YES. [2022-11-23 03:24:12,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8488 conditions, 3294 events. 2069/3294 cut-off events. For 1590/1620 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 19324 event pairs, 226 based on Foata normal form. 2/2720 useless extension candidates. Maximal degree in co-relation 8459. Up to 873 conditions per place. [2022-11-23 03:24:12,175 INFO L137 encePairwiseOnDemand]: 251/257 looper letters, 60 selfloop transitions, 14 changer transitions 0/75 dead transitions. [2022-11-23 03:24:12,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 496 flow [2022-11-23 03:24:12,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:24:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 03:24:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 918 transitions. [2022-11-23 03:24:12,179 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4464980544747082 [2022-11-23 03:24:12,179 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 918 transitions. [2022-11-23 03:24:12,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 918 transitions. [2022-11-23 03:24:12,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:24:12,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 918 transitions. [2022-11-23 03:24:12,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.75) internal successors, (918), 8 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:12,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 257.0) internal successors, (2313), 9 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:12,187 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 257.0) internal successors, (2313), 9 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:12,188 INFO L175 Difference]: Start difference. First operand has 61 places, 36 transitions, 240 flow. Second operand 8 states and 918 transitions. [2022-11-23 03:24:12,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 496 flow [2022-11-23 03:24:12,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 75 transitions, 471 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-11-23 03:24:12,194 INFO L231 Difference]: Finished difference. Result has 68 places, 41 transitions, 289 flow [2022-11-23 03:24:12,194 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=289, PETRI_PLACES=68, PETRI_TRANSITIONS=41} [2022-11-23 03:24:12,197 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2022-11-23 03:24:12,197 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 41 transitions, 289 flow [2022-11-23 03:24:12,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 108.4) internal successors, (1084), 10 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:12,198 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:24:12,198 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:24:12,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-23 03:24:12,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:24:12,418 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:24:12,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:24:12,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1582215227, now seen corresponding path program 1 times [2022-11-23 03:24:12,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:24:12,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473094705] [2022-11-23 03:24:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:24:12,419 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 [2022-11-23 03:24:12,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:24:12,419 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:24:12,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:24:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:12,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 03:24:12,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:24:12,587 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:24:12,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:24:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:24:12,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:24:12,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:24:12,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473094705] [2022-11-23 03:24:12,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473094705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:24:12,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:24:12,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:24:12,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971342234] [2022-11-23 03:24:12,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:24:12,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:24:12,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:24:12,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:24:12,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:24:12,989 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 257 [2022-11-23 03:24:12,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 41 transitions, 289 flow. Second operand has 5 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:12,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:24:12,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 257 [2022-11-23 03:24:12,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:24:14,100 INFO L130 PetriNetUnfolder]: 2258/3898 cut-off events. [2022-11-23 03:24:14,101 INFO L131 PetriNetUnfolder]: For 5805/6105 co-relation queries the response was YES. [2022-11-23 03:24:14,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12570 conditions, 3898 events. 2258/3898 cut-off events. For 5805/6105 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 24385 event pairs, 1074 based on Foata normal form. 300/3946 useless extension candidates. Maximal degree in co-relation 12536. Up to 2679 conditions per place. [2022-11-23 03:24:14,134 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 47 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2022-11-23 03:24:14,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 57 transitions, 486 flow [2022-11-23 03:24:14,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:24:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:24:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 575 transitions. [2022-11-23 03:24:14,137 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4474708171206226 [2022-11-23 03:24:14,137 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 575 transitions. [2022-11-23 03:24:14,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 575 transitions. [2022-11-23 03:24:14,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:24:14,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 575 transitions. [2022-11-23 03:24:14,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:14,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 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) [2022-11-23 03:24:14,142 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 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) [2022-11-23 03:24:14,142 INFO L175 Difference]: Start difference. First operand has 68 places, 41 transitions, 289 flow. Second operand 5 states and 575 transitions. [2022-11-23 03:24:14,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 57 transitions, 486 flow [2022-11-23 03:24:14,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 57 transitions, 459 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-23 03:24:14,152 INFO L231 Difference]: Finished difference. Result has 70 places, 42 transitions, 299 flow [2022-11-23 03:24:14,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=70, PETRI_TRANSITIONS=42} [2022-11-23 03:24:14,153 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2022-11-23 03:24:14,153 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 42 transitions, 299 flow [2022-11-23 03:24:14,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:14,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:24:14,154 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:24:14,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-23 03:24:14,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:24:14,366 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:24:14,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:24:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1617751213, now seen corresponding path program 1 times [2022-11-23 03:24:14,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:24:14,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744570274] [2022-11-23 03:24:14,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:24:14,367 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 [2022-11-23 03:24:14,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:24:14,370 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:24:14,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-23 03:24:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:14,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 03:24:14,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:24:14,593 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:24:14,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:24:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:24:14,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:24:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:24:15,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:24:15,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744570274] [2022-11-23 03:24:15,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744570274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:24:15,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:24:15,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-23 03:24:15,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569669287] [2022-11-23 03:24:15,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:24:15,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:24:15,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:24:15,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:24:15,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:24:17,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 257 [2022-11-23 03:24:17,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 42 transitions, 299 flow. Second operand has 10 states, 10 states have (on average 108.8) internal successors, (1088), 10 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:17,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:24:17,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 257 [2022-11-23 03:24:17,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:24:20,291 INFO L130 PetriNetUnfolder]: 4148/6796 cut-off events. [2022-11-23 03:24:20,291 INFO L131 PetriNetUnfolder]: For 10022/10268 co-relation queries the response was YES. [2022-11-23 03:24:20,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22928 conditions, 6796 events. 4148/6796 cut-off events. For 10022/10268 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 43037 event pairs, 858 based on Foata normal form. 930/7690 useless extension candidates. Maximal degree in co-relation 22893. Up to 2112 conditions per place. [2022-11-23 03:24:20,342 INFO L137 encePairwiseOnDemand]: 251/257 looper letters, 86 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2022-11-23 03:24:20,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 799 flow [2022-11-23 03:24:20,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:24:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 03:24:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 914 transitions. [2022-11-23 03:24:20,348 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44455252918287935 [2022-11-23 03:24:20,348 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 914 transitions. [2022-11-23 03:24:20,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 914 transitions. [2022-11-23 03:24:20,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:24:20,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 914 transitions. [2022-11-23 03:24:20,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.25) internal successors, (914), 8 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:20,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 257.0) internal successors, (2313), 9 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:20,356 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 257.0) internal successors, (2313), 9 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:20,356 INFO L175 Difference]: Start difference. First operand has 70 places, 42 transitions, 299 flow. Second operand 8 states and 914 transitions. [2022-11-23 03:24:20,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 799 flow [2022-11-23 03:24:20,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 101 transitions, 785 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:24:20,371 INFO L231 Difference]: Finished difference. Result has 78 places, 47 transitions, 368 flow [2022-11-23 03:24:20,372 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=368, PETRI_PLACES=78, PETRI_TRANSITIONS=47} [2022-11-23 03:24:20,373 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2022-11-23 03:24:20,373 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 47 transitions, 368 flow [2022-11-23 03:24:20,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 108.8) internal successors, (1088), 10 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:20,374 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:24:20,374 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-23 03:24:20,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-23 03:24:20,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:24:20,591 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:24:20,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:24:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash 2003824938, now seen corresponding path program 2 times [2022-11-23 03:24:20,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:24:20,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499984869] [2022-11-23 03:24:20,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:24:20,592 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 [2022-11-23 03:24:20,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:24:20,593 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:24:20,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-23 03:24:20,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:24:20,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:24:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 03:24:20,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:24:20,841 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:24:20,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:24:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:24:21,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:24:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:24:22,899 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:24:22,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499984869] [2022-11-23 03:24:22,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499984869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:24:22,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:24:22,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-23 03:24:22,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127941069] [2022-11-23 03:24:22,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:24:22,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 03:24:22,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:24:22,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 03:24:22,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-23 03:24:34,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2022-11-23 03:24:34,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 47 transitions, 368 flow. Second operand has 17 states, 17 states have (on average 106.17647058823529) internal successors, (1805), 17 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:34,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:24:34,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2022-11-23 03:24:34,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:24:44,043 INFO L130 PetriNetUnfolder]: 4087/6825 cut-off events. [2022-11-23 03:24:44,044 INFO L131 PetriNetUnfolder]: For 21582/22291 co-relation queries the response was YES. [2022-11-23 03:24:44,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28162 conditions, 6825 events. 4087/6825 cut-off events. For 21582/22291 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 45016 event pairs, 2025 based on Foata normal form. 762/7586 useless extension candidates. Maximal degree in co-relation 28123. Up to 4270 conditions per place. [2022-11-23 03:24:44,123 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 211 selfloop transitions, 25 changer transitions 0/237 dead transitions. [2022-11-23 03:24:44,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 237 transitions, 2031 flow [2022-11-23 03:24:44,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:24:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 03:24:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2050 transitions. [2022-11-23 03:24:44,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44314742758322523 [2022-11-23 03:24:44,132 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2050 transitions. [2022-11-23 03:24:44,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2050 transitions. [2022-11-23 03:24:44,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:24:44,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2050 transitions. [2022-11-23 03:24:44,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 113.88888888888889) internal successors, (2050), 18 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:44,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 257.0) internal successors, (4883), 19 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:44,151 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 257.0) internal successors, (4883), 19 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:44,151 INFO L175 Difference]: Start difference. First operand has 78 places, 47 transitions, 368 flow. Second operand 18 states and 2050 transitions. [2022-11-23 03:24:44,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 237 transitions, 2031 flow [2022-11-23 03:24:44,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 237 transitions, 1924 flow, removed 44 selfloop flow, removed 3 redundant places. [2022-11-23 03:24:44,191 INFO L231 Difference]: Finished difference. Result has 98 places, 62 transitions, 567 flow [2022-11-23 03:24:44,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=567, PETRI_PLACES=98, PETRI_TRANSITIONS=62} [2022-11-23 03:24:44,192 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 62 predicate places. [2022-11-23 03:24:44,193 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 62 transitions, 567 flow [2022-11-23 03:24:44,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 106.17647058823529) internal successors, (1805), 17 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:44,194 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:24:44,194 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-23 03:24:44,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-23 03:24:44,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:24:44,407 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:24:44,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:24:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1762335161, now seen corresponding path program 3 times [2022-11-23 03:24:44,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:24:44,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102401575] [2022-11-23 03:24:44,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:24:44,408 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 [2022-11-23 03:24:44,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:24:44,410 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:24:44,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-23 03:24:44,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 03:24:44,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:24:44,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 03:24:44,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:24:44,808 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:24:44,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:24:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:24:45,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:24:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:24:49,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:24:49,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102401575] [2022-11-23 03:24:49,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102401575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:24:49,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:24:49,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-23 03:24:49,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19463928] [2022-11-23 03:24:49,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:24:49,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 03:24:49,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:24:49,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 03:24:49,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-23 03:25:08,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 257 [2022-11-23 03:25:08,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 62 transitions, 567 flow. Second operand has 24 states, 24 states have (on average 111.0) internal successors, (2664), 24 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:08,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:25:08,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 257 [2022-11-23 03:25:08,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:25:36,994 INFO L130 PetriNetUnfolder]: 9102/15059 cut-off events. [2022-11-23 03:25:36,994 INFO L131 PetriNetUnfolder]: For 56388/58381 co-relation queries the response was YES. [2022-11-23 03:25:37,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65943 conditions, 15059 events. 9102/15059 cut-off events. For 56388/58381 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 101547 event pairs, 6248 based on Foata normal form. 1854/16850 useless extension candidates. Maximal degree in co-relation 65898. Up to 3339 conditions per place. [2022-11-23 03:25:37,164 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 581 selfloop transitions, 24 changer transitions 0/610 dead transitions. [2022-11-23 03:25:37,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 610 transitions, 5583 flow [2022-11-23 03:25:37,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 03:25:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-23 03:25:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3003 transitions. [2022-11-23 03:25:37,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48686770428015563 [2022-11-23 03:25:37,175 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3003 transitions. [2022-11-23 03:25:37,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3003 transitions. [2022-11-23 03:25:37,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:25:37,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3003 transitions. [2022-11-23 03:25:37,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 125.125) internal successors, (3003), 24 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:37,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 257.0) internal successors, (6425), 25 states have internal predecessors, (6425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:37,197 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 257.0) internal successors, (6425), 25 states have internal predecessors, (6425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:37,197 INFO L175 Difference]: Start difference. First operand has 98 places, 62 transitions, 567 flow. Second operand 24 states and 3003 transitions. [2022-11-23 03:25:37,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 610 transitions, 5583 flow [2022-11-23 03:25:37,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 610 transitions, 5495 flow, removed 23 selfloop flow, removed 9 redundant places. [2022-11-23 03:25:37,347 INFO L231 Difference]: Finished difference. Result has 125 places, 75 transitions, 687 flow [2022-11-23 03:25:37,347 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=687, PETRI_PLACES=125, PETRI_TRANSITIONS=75} [2022-11-23 03:25:37,348 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 89 predicate places. [2022-11-23 03:25:37,348 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 75 transitions, 687 flow [2022-11-23 03:25:37,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 111.0) internal successors, (2664), 24 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:37,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:25:37,349 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-11-23 03:25:37,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-23 03:25:37,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:25:37,564 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:25:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:25:37,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1985921851, now seen corresponding path program 3 times [2022-11-23 03:25:37,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:25:37,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107991920] [2022-11-23 03:25:37,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:25:37,566 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 [2022-11-23 03:25:37,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:25:37,568 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:25:37,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-23 03:25:37,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 03:25:37,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:25:37,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 03:25:37,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:25:38,027 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:25:38,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:25:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:25:38,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:25:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:25:39,087 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:25:39,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107991920] [2022-11-23 03:25:39,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107991920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:25:39,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:25:39,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-23 03:25:39,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756968482] [2022-11-23 03:25:39,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:25:39,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 03:25:39,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:25:39,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 03:25:39,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:25:45,098 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 257 [2022-11-23 03:25:45,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 75 transitions, 687 flow. Second operand has 16 states, 16 states have (on average 105.25) internal successors, (1684), 16 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:45,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:25:45,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 257 [2022-11-23 03:25:45,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:25:53,042 INFO L130 PetriNetUnfolder]: 9014/14836 cut-off events. [2022-11-23 03:25:53,042 INFO L131 PetriNetUnfolder]: For 54781/56344 co-relation queries the response was YES. [2022-11-23 03:25:53,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65138 conditions, 14836 events. 9014/14836 cut-off events. For 54781/56344 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 98160 event pairs, 5930 based on Foata normal form. 1579/16414 useless extension candidates. Maximal degree in co-relation 65083. Up to 13823 conditions per place. [2022-11-23 03:25:53,364 INFO L137 encePairwiseOnDemand]: 251/257 looper letters, 186 selfloop transitions, 15 changer transitions 0/202 dead transitions. [2022-11-23 03:25:53,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 202 transitions, 1890 flow [2022-11-23 03:25:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 03:25:53,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-23 03:25:53,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1675 transitions. [2022-11-23 03:25:53,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4345006485084306 [2022-11-23 03:25:53,371 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1675 transitions. [2022-11-23 03:25:53,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1675 transitions. [2022-11-23 03:25:53,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:25:53,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1675 transitions. [2022-11-23 03:25:53,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 111.66666666666667) internal successors, (1675), 15 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:53,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:53,387 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:53,387 INFO L175 Difference]: Start difference. First operand has 125 places, 75 transitions, 687 flow. Second operand 15 states and 1675 transitions. [2022-11-23 03:25:53,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 202 transitions, 1890 flow [2022-11-23 03:25:53,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 202 transitions, 1842 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-11-23 03:25:53,618 INFO L231 Difference]: Finished difference. Result has 133 places, 78 transitions, 715 flow [2022-11-23 03:25:53,618 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=715, PETRI_PLACES=133, PETRI_TRANSITIONS=78} [2022-11-23 03:25:53,619 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 97 predicate places. [2022-11-23 03:25:53,619 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 78 transitions, 715 flow [2022-11-23 03:25:53,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 105.25) internal successors, (1684), 16 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:53,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:25:53,620 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:25:53,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-23 03:25:53,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:25:53,843 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:25:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:25:53,844 INFO L85 PathProgramCache]: Analyzing trace with hash -596136726, now seen corresponding path program 2 times [2022-11-23 03:25:53,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:25:53,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549974669] [2022-11-23 03:25:53,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:25:53,845 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 [2022-11-23 03:25:53,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:25:53,857 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:25:53,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-23 03:25:54,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:25:54,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:25:54,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 03:25:54,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:25:54,249 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:25:54,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:25:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:25:54,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:25:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:25:56,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:25:56,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549974669] [2022-11-23 03:25:56,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549974669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:25:56,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:25:56,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-23 03:25:56,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743151969] [2022-11-23 03:25:56,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:25:56,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 03:25:56,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:25:56,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 03:25:56,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:26:07,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 257 [2022-11-23 03:26:07,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 78 transitions, 715 flow. Second operand has 18 states, 18 states have (on average 102.33333333333333) internal successors, (1842), 18 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:07,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:26:07,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 257 [2022-11-23 03:26:07,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:26:22,325 INFO L130 PetriNetUnfolder]: 9461/15721 cut-off events. [2022-11-23 03:26:22,325 INFO L131 PetriNetUnfolder]: For 51027/51780 co-relation queries the response was YES. [2022-11-23 03:26:22,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68057 conditions, 15721 events. 9461/15721 cut-off events. For 51027/51780 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 105607 event pairs, 4229 based on Foata normal form. 669/16344 useless extension candidates. Maximal degree in co-relation 67997. Up to 8752 conditions per place. [2022-11-23 03:26:22,500 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 263 selfloop transitions, 28 changer transitions 0/296 dead transitions. [2022-11-23 03:26:22,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 296 transitions, 2838 flow [2022-11-23 03:26:22,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 03:26:22,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-23 03:26:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2385 transitions. [2022-11-23 03:26:22,506 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42182525645560665 [2022-11-23 03:26:22,506 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2385 transitions. [2022-11-23 03:26:22,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2385 transitions. [2022-11-23 03:26:22,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:26:22,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2385 transitions. [2022-11-23 03:26:22,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 108.4090909090909) internal successors, (2385), 22 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:22,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 257.0) internal successors, (5911), 23 states have internal predecessors, (5911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:22,520 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 257.0) internal successors, (5911), 23 states have internal predecessors, (5911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:22,521 INFO L175 Difference]: Start difference. First operand has 133 places, 78 transitions, 715 flow. Second operand 22 states and 2385 transitions. [2022-11-23 03:26:22,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 296 transitions, 2838 flow [2022-11-23 03:26:22,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 296 transitions, 2807 flow, removed 5 selfloop flow, removed 7 redundant places. [2022-11-23 03:26:22,708 INFO L231 Difference]: Finished difference. Result has 152 places, 92 transitions, 888 flow [2022-11-23 03:26:22,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=888, PETRI_PLACES=152, PETRI_TRANSITIONS=92} [2022-11-23 03:26:22,708 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 116 predicate places. [2022-11-23 03:26:22,708 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 92 transitions, 888 flow [2022-11-23 03:26:22,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 102.33333333333333) internal successors, (1842), 18 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:22,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:26:22,709 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-11-23 03:26:22,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-11-23 03:26:22,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:26:22,910 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:26:22,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:26:22,910 INFO L85 PathProgramCache]: Analyzing trace with hash -655472384, now seen corresponding path program 4 times [2022-11-23 03:26:22,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:26:22,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056932842] [2022-11-23 03:26:22,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:26:22,911 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 [2022-11-23 03:26:22,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:26:22,912 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:26:22,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-23 03:26:23,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:26:23,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:26:23,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 03:26:23,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:26:23,181 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:26:23,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:26:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:26:23,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:26:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:26:25,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:26:25,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056932842] [2022-11-23 03:26:25,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056932842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:26:25,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:26:25,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2022-11-23 03:26:25,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136027169] [2022-11-23 03:26:25,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:26:25,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 03:26:25,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:26:25,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 03:26:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-11-23 03:26:45,539 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 257 [2022-11-23 03:26:45,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 92 transitions, 888 flow. Second operand has 22 states, 22 states have (on average 105.18181818181819) internal successors, (2314), 22 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:45,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:26:45,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 257 [2022-11-23 03:26:45,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:26:58,019 INFO L130 PetriNetUnfolder]: 8900/14838 cut-off events. [2022-11-23 03:26:58,019 INFO L131 PetriNetUnfolder]: For 72340/73847 co-relation queries the response was YES. [2022-11-23 03:26:58,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71019 conditions, 14838 events. 8900/14838 cut-off events. For 72340/73847 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 100275 event pairs, 5416 based on Foata normal form. 988/15609 useless extension candidates. Maximal degree in co-relation 70954. Up to 12802 conditions per place. [2022-11-23 03:26:58,236 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 301 selfloop transitions, 36 changer transitions 0/341 dead transitions. [2022-11-23 03:26:58,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 341 transitions, 3442 flow [2022-11-23 03:26:58,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 03:26:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-23 03:26:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2693 transitions. [2022-11-23 03:26:58,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4366083009079118 [2022-11-23 03:26:58,244 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2693 transitions. [2022-11-23 03:26:58,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2693 transitions. [2022-11-23 03:26:58,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:26:58,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2693 transitions. [2022-11-23 03:26:58,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 112.20833333333333) internal successors, (2693), 24 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:58,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 257.0) internal successors, (6425), 25 states have internal predecessors, (6425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:58,507 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 257.0) internal successors, (6425), 25 states have internal predecessors, (6425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:58,508 INFO L175 Difference]: Start difference. First operand has 152 places, 92 transitions, 888 flow. Second operand 24 states and 2693 transitions. [2022-11-23 03:26:58,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 341 transitions, 3442 flow [2022-11-23 03:26:58,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 341 transitions, 3115 flow, removed 157 selfloop flow, removed 5 redundant places. [2022-11-23 03:26:58,987 INFO L231 Difference]: Finished difference. Result has 171 places, 104 transitions, 1100 flow [2022-11-23 03:26:58,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1100, PETRI_PLACES=171, PETRI_TRANSITIONS=104} [2022-11-23 03:26:58,988 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 135 predicate places. [2022-11-23 03:26:58,988 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 104 transitions, 1100 flow [2022-11-23 03:26:58,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 105.18181818181819) internal successors, (2314), 22 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:58,989 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:26:58,989 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-23 03:26:59,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-23 03:26:59,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:26:59,189 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:26:59,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:26:59,190 INFO L85 PathProgramCache]: Analyzing trace with hash -2015830843, now seen corresponding path program 5 times [2022-11-23 03:26:59,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:26:59,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908578906] [2022-11-23 03:26:59,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:26:59,191 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 [2022-11-23 03:26:59,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:26:59,192 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:26:59,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-23 03:26:59,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 03:26:59,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:26:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 03:26:59,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:26:59,560 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:26:59,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:26:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:26:59,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:27:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:27:01,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:27:01,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908578906] [2022-11-23 03:27:01,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908578906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:27:01,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:27:01,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-23 03:27:01,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790340601] [2022-11-23 03:27:01,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:27:01,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 03:27:01,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:27:01,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 03:27:01,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:27:13,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 257 [2022-11-23 03:27:13,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 104 transitions, 1100 flow. Second operand has 16 states, 16 states have (on average 108.25) internal successors, (1732), 16 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:13,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:27:13,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 257 [2022-11-23 03:27:13,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:27:32,855 INFO L130 PetriNetUnfolder]: 19034/32604 cut-off events. [2022-11-23 03:27:32,856 INFO L131 PetriNetUnfolder]: For 202575/208462 co-relation queries the response was YES. [2022-11-23 03:27:33,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151688 conditions, 32604 events. 19034/32604 cut-off events. For 202575/208462 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 261987 event pairs, 1390 based on Foata normal form. 5710/38271 useless extension candidates. Maximal degree in co-relation 151621. Up to 7303 conditions per place. [2022-11-23 03:27:33,315 INFO L137 encePairwiseOnDemand]: 251/257 looper letters, 286 selfloop transitions, 33 changer transitions 0/323 dead transitions. [2022-11-23 03:27:33,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 323 transitions, 3532 flow [2022-11-23 03:27:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 03:27:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 03:27:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1639 transitions. [2022-11-23 03:27:33,320 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4555308504724847 [2022-11-23 03:27:33,320 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1639 transitions. [2022-11-23 03:27:33,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1639 transitions. [2022-11-23 03:27:33,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:27:33,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1639 transitions. [2022-11-23 03:27:33,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 117.07142857142857) internal successors, (1639), 14 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:33,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 257.0) internal successors, (3855), 15 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:33,331 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 257.0) internal successors, (3855), 15 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:33,331 INFO L175 Difference]: Start difference. First operand has 171 places, 104 transitions, 1100 flow. Second operand 14 states and 1639 transitions. [2022-11-23 03:27:33,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 323 transitions, 3532 flow [2022-11-23 03:27:34,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 323 transitions, 3406 flow, removed 33 selfloop flow, removed 20 redundant places. [2022-11-23 03:27:34,285 INFO L231 Difference]: Finished difference. Result has 171 places, 111 transitions, 1125 flow [2022-11-23 03:27:34,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1125, PETRI_PLACES=171, PETRI_TRANSITIONS=111} [2022-11-23 03:27:34,286 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 135 predicate places. [2022-11-23 03:27:34,286 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 111 transitions, 1125 flow [2022-11-23 03:27:34,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 108.25) internal successors, (1732), 16 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:34,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:27:34,287 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:27:34,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-23 03:27:34,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:27:34,496 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:27:34,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:27:34,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1275874352, now seen corresponding path program 1 times [2022-11-23 03:27:34,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:27:34,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007124342] [2022-11-23 03:27:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:27:34,497 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 [2022-11-23 03:27:34,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:27:34,498 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:27:34,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-23 03:27:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:27:34,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:27:34,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:27:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:27:34,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:27:34,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:27:34,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007124342] [2022-11-23 03:27:34,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007124342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:27:34,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:27:34,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:27:34,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191720150] [2022-11-23 03:27:34,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:27:34,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:27:34,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:27:34,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:27:34,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:27:34,631 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 257 [2022-11-23 03:27:34,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 111 transitions, 1125 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:34,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:27:34,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 257 [2022-11-23 03:27:34,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:27:44,475 INFO L130 PetriNetUnfolder]: 18710/32112 cut-off events. [2022-11-23 03:27:44,475 INFO L131 PetriNetUnfolder]: For 183289/189505 co-relation queries the response was YES. [2022-11-23 03:27:44,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160284 conditions, 32112 events. 18710/32112 cut-off events. For 183289/189505 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 255926 event pairs, 7710 based on Foata normal form. 3964/35908 useless extension candidates. Maximal degree in co-relation 160214. Up to 31261 conditions per place. [2022-11-23 03:27:45,024 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 105 selfloop transitions, 11 changer transitions 5/128 dead transitions. [2022-11-23 03:27:45,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 128 transitions, 1492 flow [2022-11-23 03:27:45,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:27:45,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:27:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2022-11-23 03:27:45,026 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5006485084306096 [2022-11-23 03:27:45,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2022-11-23 03:27:45,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2022-11-23 03:27:45,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:27:45,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2022-11-23 03:27:45,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:45,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:45,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:45,031 INFO L175 Difference]: Start difference. First operand has 171 places, 111 transitions, 1125 flow. Second operand 3 states and 386 transitions. [2022-11-23 03:27:45,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 128 transitions, 1492 flow [2022-11-23 03:27:46,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 128 transitions, 1424 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-23 03:27:46,659 INFO L231 Difference]: Finished difference. Result has 168 places, 114 transitions, 1158 flow [2022-11-23 03:27:46,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1158, PETRI_PLACES=168, PETRI_TRANSITIONS=114} [2022-11-23 03:27:46,659 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 132 predicate places. [2022-11-23 03:27:46,659 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 114 transitions, 1158 flow [2022-11-23 03:27:46,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:46,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:27:46,660 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:27:46,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-23 03:27:46,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:27:46,860 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:27:46,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:27:46,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1288860728, now seen corresponding path program 3 times [2022-11-23 03:27:46,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:27:46,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892017494] [2022-11-23 03:27:46,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:27:46,861 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 [2022-11-23 03:27:46,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:27:46,862 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:27:46,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-23 03:27:47,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 03:27:47,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:27:47,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 03:27:47,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:27:47,302 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:27:47,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:27:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:27:47,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:27:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:27:48,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:27:48,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892017494] [2022-11-23 03:27:48,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892017494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:27:48,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:27:48,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-23 03:27:48,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878117064] [2022-11-23 03:27:48,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:27:48,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 03:27:48,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:27:48,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 03:27:48,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:27:54,914 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 257 [2022-11-23 03:27:54,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 114 transitions, 1158 flow. Second operand has 18 states, 18 states have (on average 105.44444444444444) internal successors, (1898), 18 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:54,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:27:54,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 257 [2022-11-23 03:27:54,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:28:01,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:28:12,341 INFO L130 PetriNetUnfolder]: 19897/34142 cut-off events. [2022-11-23 03:28:12,342 INFO L131 PetriNetUnfolder]: For 193109/194053 co-relation queries the response was YES. [2022-11-23 03:28:12,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163425 conditions, 34142 events. 19897/34142 cut-off events. For 193109/194053 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 264623 event pairs, 14793 based on Foata normal form. 834/34938 useless extension candidates. Maximal degree in co-relation 163354. Up to 32818 conditions per place. [2022-11-23 03:28:12,828 INFO L137 encePairwiseOnDemand]: 251/257 looper letters, 179 selfloop transitions, 27 changer transitions 0/210 dead transitions. [2022-11-23 03:28:12,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 210 transitions, 2011 flow [2022-11-23 03:28:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:28:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 03:28:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2005 transitions. [2022-11-23 03:28:12,833 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4334198011240813 [2022-11-23 03:28:12,833 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2005 transitions. [2022-11-23 03:28:12,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2005 transitions. [2022-11-23 03:28:12,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:28:12,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2005 transitions. [2022-11-23 03:28:12,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 111.38888888888889) internal successors, (2005), 18 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:12,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 257.0) internal successors, (4883), 19 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:12,846 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 257.0) internal successors, (4883), 19 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:12,846 INFO L175 Difference]: Start difference. First operand has 168 places, 114 transitions, 1158 flow. Second operand 18 states and 2005 transitions. [2022-11-23 03:28:12,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 210 transitions, 2011 flow [2022-11-23 03:28:14,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 210 transitions, 1988 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-23 03:28:14,982 INFO L231 Difference]: Finished difference. Result has 175 places, 107 transitions, 1124 flow [2022-11-23 03:28:14,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1124, PETRI_PLACES=175, PETRI_TRANSITIONS=107} [2022-11-23 03:28:14,983 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 139 predicate places. [2022-11-23 03:28:14,983 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 107 transitions, 1124 flow [2022-11-23 03:28:14,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 105.44444444444444) internal successors, (1898), 18 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:14,984 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:28:14,984 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:14,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-23 03:28:15,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:28:15,186 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:28:15,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:15,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1985224133, now seen corresponding path program 4 times [2022-11-23 03:28:15,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:28:15,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580432877] [2022-11-23 03:28:15,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:28:15,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:28:15,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:28:15,188 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:28:15,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-23 03:28:15,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:28:15,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:28:15,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 03:28:15,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:28:15,535 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 03:28:15,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 03:28:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:28:15,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:28:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:28:18,034 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:28:18,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580432877] [2022-11-23 03:28:18,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580432877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:28:18,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:28:18,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-23 03:28:18,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367193209] [2022-11-23 03:28:18,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:28:18,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 03:28:18,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:28:18,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 03:28:18,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:28:27,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 257 [2022-11-23 03:28:27,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 107 transitions, 1124 flow. Second operand has 16 states, 16 states have (on average 108.5) internal successors, (1736), 16 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:27,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:28:27,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 257 [2022-11-23 03:28:27,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:28:57,209 INFO L130 PetriNetUnfolder]: 39751/71960 cut-off events. [2022-11-23 03:28:57,209 INFO L131 PetriNetUnfolder]: For 283828/284678 co-relation queries the response was YES. [2022-11-23 03:28:58,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341033 conditions, 71960 events. 39751/71960 cut-off events. For 283828/284678 co-relation queries the response was YES. Maximal size of possible extension queue 1656. Compared 669786 event pairs, 4551 based on Foata normal form. 7828/79712 useless extension candidates. Maximal degree in co-relation 340962. Up to 13737 conditions per place. [2022-11-23 03:28:58,609 INFO L137 encePairwiseOnDemand]: 251/257 looper letters, 307 selfloop transitions, 38 changer transitions 0/349 dead transitions. [2022-11-23 03:28:58,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 349 transitions, 3739 flow [2022-11-23 03:28:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 03:28:58,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 03:28:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1621 transitions. [2022-11-23 03:28:58,613 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45052807115063925 [2022-11-23 03:28:58,613 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1621 transitions. [2022-11-23 03:28:58,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1621 transitions. [2022-11-23 03:28:58,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:28:58,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1621 transitions. [2022-11-23 03:28:58,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 115.78571428571429) internal successors, (1621), 14 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:58,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 257.0) internal successors, (3855), 15 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:58,623 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 257.0) internal successors, (3855), 15 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:58,624 INFO L175 Difference]: Start difference. First operand has 175 places, 107 transitions, 1124 flow. Second operand 14 states and 1621 transitions. [2022-11-23 03:28:58,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 349 transitions, 3739 flow [2022-11-23 03:29:01,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 349 transitions, 3698 flow, removed 8 selfloop flow, removed 8 redundant places. [2022-11-23 03:29:01,192 INFO L231 Difference]: Finished difference. Result has 187 places, 114 transitions, 1304 flow [2022-11-23 03:29:01,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1304, PETRI_PLACES=187, PETRI_TRANSITIONS=114} [2022-11-23 03:29:01,193 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 151 predicate places. [2022-11-23 03:29:01,193 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 114 transitions, 1304 flow [2022-11-23 03:29:01,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 108.5) internal successors, (1736), 16 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:01,194 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:29:01,194 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:29:01,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-23 03:29:01,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:29:01,403 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 03:29:01,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:29:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash -3593453, now seen corresponding path program 1 times [2022-11-23 03:29:01,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:29:01,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145268206] [2022-11-23 03:29:01,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:01,405 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 [2022-11-23 03:29:01,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:29:01,411 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 03:29:01,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d67c021-fffd-4d43-b335-17c96de51304/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-23 03:29:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:01,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 03:29:01,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:29:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:29:01,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:29:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:29:01,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:29:01,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145268206] [2022-11-23 03:29:01,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145268206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:29:01,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:29:01,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-23 03:29:01,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151508797] [2022-11-23 03:29:01,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:29:01,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 03:29:01,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:29:01,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 03:29:01,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:29:02,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 257 [2022-11-23 03:29:02,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 114 transitions, 1304 flow. Second operand has 11 states, 11 states have (on average 112.72727272727273) internal successors, (1240), 11 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:02,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:29:02,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 257 [2022-11-23 03:29:02,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand