./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:44:53,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:44:53,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:44:53,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:44:53,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:44:53,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:44:53,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:44:53,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:44:53,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:44:53,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:44:53,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:44:53,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:44:53,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:44:53,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:44:53,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:44:53,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:44:53,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:44:53,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:44:53,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:44:53,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:44:53,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:44:53,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:44:53,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:44:53,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:44:53,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:44:53,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:44:53,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:44:53,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:44:53,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:44:53,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:44:53,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:44:53,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:44:53,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:44:53,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:44:53,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:44:53,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:44:53,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:44:53,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:44:53,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:44:53,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:44:53,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:44:53,652 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 18:44:53,666 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:44:53,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:44:53,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:44:53,667 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:44:53,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:44:53,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:44:53,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:44:53,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:44:53,674 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:44:53,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:44:53,674 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:44:53,674 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:44:53,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:44:53,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:44:53,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:44:53,675 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:44:53,675 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:44:53,675 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:44:53,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:44:53,675 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:44:53,675 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:44:53,675 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:44:53,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:44:53,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:44:53,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:44:53,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:44:53,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:44:53,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:44:53,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:44:53,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:44:53,676 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:44:53,676 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:44:53,677 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:44:53,677 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:44:53,677 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_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 [2022-12-13 18:44:53,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:44:53,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:44:53,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:44:53,865 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:44:53,866 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:44:53,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2022-12-13 18:44:56,446 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:44:56,612 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:44:56,613 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2022-12-13 18:44:56,617 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/data/09ecfdb37/43ef7464009043dc83694f52f1955a98/FLAG58b12b11d [2022-12-13 18:44:57,046 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/data/09ecfdb37/43ef7464009043dc83694f52f1955a98 [2022-12-13 18:44:57,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:44:57,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:44:57,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:44:57,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:44:57,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:44:57,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:44:57" (1/1) ... [2022-12-13 18:44:57,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f937d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:44:57, skipping insertion in model container [2022-12-13 18:44:57,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:44:57" (1/1) ... [2022-12-13 18:44:57,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:44:57,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:44:57,186 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:44:57,188 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:44:57,189 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:44:57,190 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:44:57,192 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:44:57,193 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:44:57,193 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:44:57,194 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:44:57,195 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:44:57,196 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:44:57,202 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_abf92d2b-0cd3-437e-8043-760cbecb2ab8/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2022-12-13 18:44:57,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:44:57,217 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-13 18:44:57,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e34de5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:44:57, skipping insertion in model container [2022-12-13 18:44:57,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:44:57,218 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 18:44:57,219 INFO L158 Benchmark]: Toolchain (without parser) took 166.37ms. Allocated memory is still 123.7MB. Free memory was 90.6MB in the beginning and 79.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 18:44:57,220 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 123.7MB. Free memory is still 93.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 18:44:57,220 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.78ms. Allocated memory is still 123.7MB. Free memory was 90.6MB in the beginning and 79.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 18:44:57,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 123.7MB. Free memory is still 93.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 163.78ms. Allocated memory is still 123.7MB. Free memory was 90.6MB in the beginning and 79.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 144]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:44:58,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:44:58,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:44:58,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:44:58,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:44:58,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:44:58,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:44:58,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:44:58,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:44:58,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:44:58,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:44:58,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:44:58,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:44:58,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:44:58,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:44:58,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:44:58,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:44:58,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:44:58,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:44:58,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:44:58,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:44:58,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:44:58,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:44:58,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:44:58,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:44:58,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:44:58,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:44:58,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:44:58,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:44:58,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:44:58,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:44:58,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:44:58,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:44:58,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:44:58,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:44:58,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:44:58,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:44:58,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:44:58,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:44:58,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:44:58,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:44:58,687 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 18:44:58,711 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:44:58,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:44:58,712 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:44:58,712 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:44:58,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:44:58,713 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:44:58,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:44:58,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:44:58,714 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:44:58,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:44:58,714 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:44:58,714 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:44:58,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:44:58,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:44:58,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:44:58,715 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:44:58,715 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:44:58,715 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:44:58,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:44:58,715 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:44:58,716 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 18:44:58,716 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 18:44:58,716 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:44:58,716 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:44:58,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:44:58,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:44:58,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:44:58,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:44:58,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:44:58,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:44:58,717 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 18:44:58,717 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 18:44:58,722 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:44:58,723 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:44:58,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:44:58,723 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 18:44:58,723 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:44:58,723 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_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 [2022-12-13 18:44:58,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:44:58,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:44:58,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:44:58,947 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:44:58,947 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:44:58,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2022-12-13 18:45:01,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:45:01,791 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:45:01,792 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2022-12-13 18:45:01,797 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/data/629d6d72d/5d562d64e25e4be48e7139d9132a6682/FLAG316bdae49 [2022-12-13 18:45:01,808 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/data/629d6d72d/5d562d64e25e4be48e7139d9132a6682 [2022-12-13 18:45:01,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:45:01,811 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:45:01,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:45:01,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:45:01,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:45:01,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:45:01" (1/1) ... [2022-12-13 18:45:01,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23221f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:01, skipping insertion in model container [2022-12-13 18:45:01,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:45:01" (1/1) ... [2022-12-13 18:45:01,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:45:01,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:45:01,951 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:01,953 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:01,955 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:01,956 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:01,958 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:01,959 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:01,959 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:01,960 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:01,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:01,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:01,970 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_abf92d2b-0cd3-437e-8043-760cbecb2ab8/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2022-12-13 18:45:01,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:45:02,000 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 18:45:02,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:45:02,009 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:02,010 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:02,010 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:02,011 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:02,012 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:02,012 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:02,013 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:02,013 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:02,014 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:02,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:02,019 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_abf92d2b-0cd3-437e-8043-760cbecb2ab8/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2022-12-13 18:45:02,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:45:02,025 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:45:02,035 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:02,036 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:02,036 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:02,037 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:02,037 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:02,038 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:02,038 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:02,039 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:02,040 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:45:02,040 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:45:02,044 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_abf92d2b-0cd3-437e-8043-760cbecb2ab8/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2022-12-13 18:45:02,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:45:02,058 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:45:02,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:02 WrapperNode [2022-12-13 18:45:02,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:45:02,060 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:45:02,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:45:02,060 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:45:02,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:02" (1/1) ... [2022-12-13 18:45:02,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:02" (1/1) ... [2022-12-13 18:45:02,094 INFO L138 Inliner]: procedures = 28, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 250 [2022-12-13 18:45:02,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:45:02,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:45:02,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:45:02,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:45:02,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:02" (1/1) ... [2022-12-13 18:45:02,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:02" (1/1) ... [2022-12-13 18:45:02,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:02" (1/1) ... [2022-12-13 18:45:02,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:02" (1/1) ... [2022-12-13 18:45:02,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:02" (1/1) ... [2022-12-13 18:45:02,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:02" (1/1) ... [2022-12-13 18:45:02,118 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:02" (1/1) ... [2022-12-13 18:45:02,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:02" (1/1) ... [2022-12-13 18:45:02,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:45:02,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:45:02,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:45:02,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:45:02,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:02" (1/1) ... [2022-12-13 18:45:02,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:45:02,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:45:02,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:45:02,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:45:02,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:45:02,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 18:45:02,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:45:02,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 18:45:02,178 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 18:45:02,178 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 18:45:02,178 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 18:45:02,178 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 18:45:02,178 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 18:45:02,178 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 18:45:02,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 18:45:02,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 18:45:02,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 18:45:02,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:45:02,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:45:02,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:45:02,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 18:45:02,180 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 18:45:02,283 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:45:02,285 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:45:02,824 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:45:02,919 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:45:02,919 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-13 18:45:02,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:45:02 BoogieIcfgContainer [2022-12-13 18:45:02,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:45:02,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:45:02,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:45:02,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:45:02,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:45:01" (1/3) ... [2022-12-13 18:45:02,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6860b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:45:02, skipping insertion in model container [2022-12-13 18:45:02,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:45:02" (2/3) ... [2022-12-13 18:45:02,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6860b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:45:02, skipping insertion in model container [2022-12-13 18:45:02,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:45:02" (3/3) ... [2022-12-13 18:45:02,936 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2022-12-13 18:45:02,951 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:45:02,951 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-13 18:45:02,951 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:45:03,015 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 18:45:03,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 246 transitions, 516 flow [2022-12-13 18:45:03,125 INFO L130 PetriNetUnfolder]: 18/243 cut-off events. [2022-12-13 18:45:03,126 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 18:45:03,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 243 events. 18/243 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 246 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 192. Up to 3 conditions per place. [2022-12-13 18:45:03,131 INFO L82 GeneralOperation]: Start removeDead. Operand has 238 places, 246 transitions, 516 flow [2022-12-13 18:45:03,137 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 238 transitions, 494 flow [2022-12-13 18:45:03,140 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:45:03,154 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 238 transitions, 494 flow [2022-12-13 18:45:03,156 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 238 transitions, 494 flow [2022-12-13 18:45:03,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 238 transitions, 494 flow [2022-12-13 18:45:03,200 INFO L130 PetriNetUnfolder]: 18/238 cut-off events. [2022-12-13 18:45:03,200 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 18:45:03,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 238 events. 18/238 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 245 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 192. Up to 3 conditions per place. [2022-12-13 18:45:03,204 INFO L119 LiptonReduction]: Number of co-enabled transitions 3276 [2022-12-13 18:45:35,395 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 161 DAG size of output: 158 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 18:45:36,857 INFO L134 LiptonReduction]: Checked pairs total: 5188 [2022-12-13 18:45:36,857 INFO L136 LiptonReduction]: Total number of compositions: 259 [2022-12-13 18:45:36,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:45:36,870 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;@48c7cf61, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:45:36,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-12-13 18:45:36,872 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 18:45:36,872 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:45:36,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:45:36,873 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:45:36,873 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:45:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:45:36,876 INFO L85 PathProgramCache]: Analyzing trace with hash 35792, now seen corresponding path program 1 times [2022-12-13 18:45:36,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:45:36,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147857764] [2022-12-13 18:45:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:45:36,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:36,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:45:36,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:45:36,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 18:45:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:45:36,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:45:36,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:45:37,073 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:45:37,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:45:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:45:37,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:45:37,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:45:37,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147857764] [2022-12-13 18:45:37,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147857764] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:45:37,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:45:37,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:45:37,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979489440] [2022-12-13 18:45:37,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:45:37,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:45:37,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:45:37,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:45:37,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:45:37,239 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 505 [2022-12-13 18:45:37,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:37,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:45:37,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 505 [2022-12-13 18:45:37,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:45:38,206 INFO L130 PetriNetUnfolder]: 4871/6432 cut-off events. [2022-12-13 18:45:38,207 INFO L131 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-12-13 18:45:38,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13042 conditions, 6432 events. 4871/6432 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 30491 event pairs, 3250 based on Foata normal form. 0/1974 useless extension candidates. Maximal degree in co-relation 11925. Up to 6431 conditions per place. [2022-12-13 18:45:38,240 INFO L137 encePairwiseOnDemand]: 500/505 looper letters, 49 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2022-12-13 18:45:38,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 220 flow [2022-12-13 18:45:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:45:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:45:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2022-12-13 18:45:38,252 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4316831683168317 [2022-12-13 18:45:38,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2022-12-13 18:45:38,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2022-12-13 18:45:38,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:45:38,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2022-12-13 18:45:38,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:38,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:38,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:38,268 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 3 states and 654 transitions. [2022-12-13 18:45:38,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 220 flow [2022-12-13 18:45:38,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 208 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 18:45:38,275 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 110 flow [2022-12-13 18:45:38,276 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2022-12-13 18:45:38,279 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2022-12-13 18:45:38,279 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 110 flow [2022-12-13 18:45:38,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:38,280 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:45:38,280 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:45:38,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:45:38,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:38,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:45:38,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:45:38,481 INFO L85 PathProgramCache]: Analyzing trace with hash 35793, now seen corresponding path program 1 times [2022-12-13 18:45:38,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:45:38,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941907642] [2022-12-13 18:45:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:45:38,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:38,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:45:38,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:45:38,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 18:45:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:45:38,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:45:38,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:45:38,636 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:45:38,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:45:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:45:38,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:45:38,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:45:38,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941907642] [2022-12-13 18:45:38,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941907642] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:45:38,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:45:38,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:45:38,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412056274] [2022-12-13 18:45:38,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:45:38,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:45:38,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:45:38,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:45:38,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:45:38,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 505 [2022-12-13 18:45:38,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:38,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:45:38,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 505 [2022-12-13 18:45:38,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:45:40,395 INFO L130 PetriNetUnfolder]: 9741/12861 cut-off events. [2022-12-13 18:45:40,395 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-12-13 18:45:40,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25852 conditions, 12861 events. 9741/12861 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 68289 event pairs, 6500 based on Foata normal form. 0/3950 useless extension candidates. Maximal degree in co-relation 25846. Up to 6432 conditions per place. [2022-12-13 18:45:40,438 INFO L137 encePairwiseOnDemand]: 499/505 looper letters, 93 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2022-12-13 18:45:40,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 98 transitions, 404 flow [2022-12-13 18:45:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:45:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:45:40,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2022-12-13 18:45:40,440 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4613861386138614 [2022-12-13 18:45:40,440 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2022-12-13 18:45:40,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2022-12-13 18:45:40,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:45:40,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2022-12-13 18:45:40,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:40,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:40,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:40,445 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 110 flow. Second operand 3 states and 699 transitions. [2022-12-13 18:45:40,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 98 transitions, 404 flow [2022-12-13 18:45:40,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 98 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:45:40,446 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 141 flow [2022-12-13 18:45:40,446 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2022-12-13 18:45:40,447 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2022-12-13 18:45:40,447 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 141 flow [2022-12-13 18:45:40,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:40,447 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:45:40,448 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 18:45:40,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 18:45:40,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:40,649 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:45:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:45:40,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1115937, now seen corresponding path program 1 times [2022-12-13 18:45:40,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:45:40,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867767772] [2022-12-13 18:45:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:45:40,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:40,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:45:40,651 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:45:40,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 18:45:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:45:40,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 18:45:40,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:45:40,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:45:40,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:45:40,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:45:40,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:45:40,804 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-13 18:45:40,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-13 18:45:40,827 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 18:45:40,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 18:45:40,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:45:40,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:45:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:45:40,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:45:40,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:45:40,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867767772] [2022-12-13 18:45:40,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867767772] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:45:40,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:45:40,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:45:40,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090331074] [2022-12-13 18:45:40,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:45:40,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:45:40,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:45:40,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:45:40,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:45:41,135 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 505 [2022-12-13 18:45:41,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:41,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:45:41,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 505 [2022-12-13 18:45:41,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:45:42,276 INFO L130 PetriNetUnfolder]: 7661/10219 cut-off events. [2022-12-13 18:45:42,277 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-12-13 18:45:42,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20582 conditions, 10219 events. 7661/10219 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 53753 event pairs, 5082 based on Foata normal form. 0/3357 useless extension candidates. Maximal degree in co-relation 20573. Up to 10217 conditions per place. [2022-12-13 18:45:42,304 INFO L137 encePairwiseOnDemand]: 502/505 looper letters, 50 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2022-12-13 18:45:42,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 239 flow [2022-12-13 18:45:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:45:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:45:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 662 transitions. [2022-12-13 18:45:42,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43696369636963694 [2022-12-13 18:45:42,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 662 transitions. [2022-12-13 18:45:42,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 662 transitions. [2022-12-13 18:45:42,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:45:42,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 662 transitions. [2022-12-13 18:45:42,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:42,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:42,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:42,309 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 141 flow. Second operand 3 states and 662 transitions. [2022-12-13 18:45:42,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 239 flow [2022-12-13 18:45:42,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:45:42,310 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 131 flow [2022-12-13 18:45:42,311 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2022-12-13 18:45:42,311 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2022-12-13 18:45:42,311 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 131 flow [2022-12-13 18:45:42,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:42,311 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:45:42,312 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 18:45:42,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 18:45:42,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:42,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:45:42,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:45:42,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1115936, now seen corresponding path program 1 times [2022-12-13 18:45:42,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:45:42,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538668453] [2022-12-13 18:45:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:45:42,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:42,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:45:42,515 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:45:42,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 18:45:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:45:42,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:45:42,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:45:42,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:45:42,720 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-13 18:45:42,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-12-13 18:45:43,015 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-12-13 18:45:43,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-12-13 18:45:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:45:43,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:45:43,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:45:43,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538668453] [2022-12-13 18:45:43,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538668453] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:45:43,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:45:43,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:45:43,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658217707] [2022-12-13 18:45:43,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:45:43,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:45:43,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:45:43,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:45:43,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:45:43,284 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 505 [2022-12-13 18:45:43,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:43,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:45:43,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 505 [2022-12-13 18:45:43,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:45:44,164 INFO L130 PetriNetUnfolder]: 5581/7577 cut-off events. [2022-12-13 18:45:44,164 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-12-13 18:45:44,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15295 conditions, 7577 events. 5581/7577 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 39312 event pairs, 3664 based on Foata normal form. 0/2761 useless extension candidates. Maximal degree in co-relation 15286. Up to 7575 conditions per place. [2022-12-13 18:45:44,184 INFO L137 encePairwiseOnDemand]: 502/505 looper letters, 48 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2022-12-13 18:45:44,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 225 flow [2022-12-13 18:45:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:45:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:45:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 657 transitions. [2022-12-13 18:45:44,187 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43366336633663366 [2022-12-13 18:45:44,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 657 transitions. [2022-12-13 18:45:44,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 657 transitions. [2022-12-13 18:45:44,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:45:44,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 657 transitions. [2022-12-13 18:45:44,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:44,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:44,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:44,190 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 131 flow. Second operand 3 states and 657 transitions. [2022-12-13 18:45:44,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 225 flow [2022-12-13 18:45:44,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:45:44,192 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 128 flow [2022-12-13 18:45:44,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2022-12-13 18:45:44,192 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2022-12-13 18:45:44,192 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 128 flow [2022-12-13 18:45:44,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:44,193 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:45:44,193 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 18:45:44,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 18:45:44,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:44,394 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:45:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:45:44,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1114438, now seen corresponding path program 1 times [2022-12-13 18:45:44,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:45:44,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389029265] [2022-12-13 18:45:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:45:44,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:44,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:45:44,396 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:45:44,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 18:45:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:45:44,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:45:44,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:45:44,527 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:45:44,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:45:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:45:44,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:45:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:45:44,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:45:44,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389029265] [2022-12-13 18:45:44,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389029265] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:45:44,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:45:44,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 18:45:44,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034642332] [2022-12-13 18:45:44,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:45:44,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:45:44,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:45:44,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:45:44,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:45:45,778 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 505 [2022-12-13 18:45:45,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 128 flow. Second operand has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:45,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:45:45,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 505 [2022-12-13 18:45:45,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:45:48,062 INFO L130 PetriNetUnfolder]: 8375/11372 cut-off events. [2022-12-13 18:45:48,062 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2022-12-13 18:45:48,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22958 conditions, 11372 events. 8375/11372 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 62201 event pairs, 5496 based on Foata normal form. 0/4153 useless extension candidates. Maximal degree in co-relation 22948. Up to 3789 conditions per place. [2022-12-13 18:45:48,090 INFO L137 encePairwiseOnDemand]: 498/505 looper letters, 125 selfloop transitions, 15 changer transitions 0/141 dead transitions. [2022-12-13 18:45:48,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 141 transitions, 620 flow [2022-12-13 18:45:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:45:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:45:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1286 transitions. [2022-12-13 18:45:48,093 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42442244224422443 [2022-12-13 18:45:48,093 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1286 transitions. [2022-12-13 18:45:48,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1286 transitions. [2022-12-13 18:45:48,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:45:48,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1286 transitions. [2022-12-13 18:45:48,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:48,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 505.0) internal successors, (3535), 7 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:48,099 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 505.0) internal successors, (3535), 7 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:48,099 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 128 flow. Second operand 6 states and 1286 transitions. [2022-12-13 18:45:48,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 141 transitions, 620 flow [2022-12-13 18:45:48,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 141 transitions, 619 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:45:48,102 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 240 flow [2022-12-13 18:45:48,102 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2022-12-13 18:45:48,103 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2022-12-13 18:45:48,103 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 240 flow [2022-12-13 18:45:48,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:48,104 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:45:48,104 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 18:45:48,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 18:45:48,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:48,305 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:45:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:45:48,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1072440290, now seen corresponding path program 1 times [2022-12-13 18:45:48,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:45:48,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016146076] [2022-12-13 18:45:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:45:48,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:48,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:45:48,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:45:48,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 18:45:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:45:48,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 18:45:48,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:45:48,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:45:48,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:45:48,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:45:48,476 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 18:45:48,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-13 18:45:48,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 18:45:48,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:45:48,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:45:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:45:48,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:45:48,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:45:48,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016146076] [2022-12-13 18:45:48,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016146076] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:45:48,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:45:48,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:45:48,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781318012] [2022-12-13 18:45:48,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:45:48,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:45:48,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:45:48,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:45:48,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:45:48,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 505 [2022-12-13 18:45:48,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:48,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:45:48,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 505 [2022-12-13 18:45:48,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:45:49,935 INFO L130 PetriNetUnfolder]: 8102/10958 cut-off events. [2022-12-13 18:45:49,935 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-12-13 18:45:49,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22175 conditions, 10958 events. 8102/10958 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 60226 event pairs, 5280 based on Foata normal form. 0/4057 useless extension candidates. Maximal degree in co-relation 22160. Up to 10955 conditions per place. [2022-12-13 18:45:49,961 INFO L137 encePairwiseOnDemand]: 502/505 looper letters, 57 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2022-12-13 18:45:49,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 352 flow [2022-12-13 18:45:49,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:45:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:45:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2022-12-13 18:45:49,964 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43432343234323434 [2022-12-13 18:45:49,964 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2022-12-13 18:45:49,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2022-12-13 18:45:49,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:45:49,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2022-12-13 18:45:49,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:49,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:49,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:49,967 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 240 flow. Second operand 3 states and 658 transitions. [2022-12-13 18:45:49,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 352 flow [2022-12-13 18:45:49,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 333 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 18:45:49,969 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 219 flow [2022-12-13 18:45:49,969 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2022-12-13 18:45:49,970 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2022-12-13 18:45:49,970 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 219 flow [2022-12-13 18:45:49,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:49,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:45:49,971 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 18:45:49,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 18:45:50,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:50,172 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:45:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:45:50,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1072440291, now seen corresponding path program 1 times [2022-12-13 18:45:50,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:45:50,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308953167] [2022-12-13 18:45:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:45:50,173 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:50,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:45:50,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:45:50,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 18:45:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:45:50,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 18:45:50,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:45:50,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:45:50,341 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-13 18:45:50,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-12-13 18:45:50,549 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-13 18:45:50,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-12-13 18:45:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:45:50,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:45:50,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:45:50,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308953167] [2022-12-13 18:45:50,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308953167] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:45:50,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:45:50,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:45:50,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876214779] [2022-12-13 18:45:50,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:45:50,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:45:50,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:45:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:45:50,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:45:50,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 505 [2022-12-13 18:45:50,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:50,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:45:50,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 505 [2022-12-13 18:45:50,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:45:51,925 INFO L130 PetriNetUnfolder]: 7829/10544 cut-off events. [2022-12-13 18:45:51,925 INFO L131 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2022-12-13 18:45:51,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21338 conditions, 10544 events. 7829/10544 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 57669 event pairs, 5064 based on Foata normal form. 0/3961 useless extension candidates. Maximal degree in co-relation 21322. Up to 10541 conditions per place. [2022-12-13 18:45:51,954 INFO L137 encePairwiseOnDemand]: 502/505 looper letters, 55 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2022-12-13 18:45:51,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 327 flow [2022-12-13 18:45:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:45:51,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:45:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2022-12-13 18:45:51,956 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.431023102310231 [2022-12-13 18:45:51,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2022-12-13 18:45:51,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2022-12-13 18:45:51,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:45:51,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2022-12-13 18:45:51,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:51,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:51,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:51,959 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 219 flow. Second operand 3 states and 653 transitions. [2022-12-13 18:45:51,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 327 flow [2022-12-13 18:45:51,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:45:51,961 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 216 flow [2022-12-13 18:45:51,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2022-12-13 18:45:51,962 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2022-12-13 18:45:51,962 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 216 flow [2022-12-13 18:45:51,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:51,962 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:45:51,962 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:45:51,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 18:45:52,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:52,164 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:45:52,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:45:52,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1114096090, now seen corresponding path program 1 times [2022-12-13 18:45:52,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:45:52,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610148807] [2022-12-13 18:45:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:45:52,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:52,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:45:52,170 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:45:52,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 18:45:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:45:52,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:45:52,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:45:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:45:52,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:45:52,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:45:52,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610148807] [2022-12-13 18:45:52,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610148807] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:45:52,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:45:52,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:45:52,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519391749] [2022-12-13 18:45:52,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:45:52,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:45:52,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:45:52,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:45:52,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:45:52,385 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 505 [2022-12-13 18:45:52,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:52,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:45:52,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 505 [2022-12-13 18:45:52,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:45:53,593 INFO L130 PetriNetUnfolder]: 7906/10723 cut-off events. [2022-12-13 18:45:53,594 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-12-13 18:45:53,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21730 conditions, 10723 events. 7906/10723 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 58501 event pairs, 5127 based on Foata normal form. 129/4224 useless extension candidates. Maximal degree in co-relation 21713. Up to 10540 conditions per place. [2022-12-13 18:45:53,625 INFO L137 encePairwiseOnDemand]: 491/505 looper letters, 75 selfloop transitions, 3 changer transitions 1/80 dead transitions. [2022-12-13 18:45:53,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 463 flow [2022-12-13 18:45:53,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:45:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:45:53,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 876 transitions. [2022-12-13 18:45:53,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43366336633663366 [2022-12-13 18:45:53,627 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 876 transitions. [2022-12-13 18:45:53,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 876 transitions. [2022-12-13 18:45:53,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:45:53,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 876 transitions. [2022-12-13 18:45:53,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:53,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:53,631 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:53,631 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 216 flow. Second operand 4 states and 876 transitions. [2022-12-13 18:45:53,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 463 flow [2022-12-13 18:45:53,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 462 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:45:53,633 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 244 flow [2022-12-13 18:45:53,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=244, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2022-12-13 18:45:53,633 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2022-12-13 18:45:53,633 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 244 flow [2022-12-13 18:45:53,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:53,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:45:53,634 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 18:45:53,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 18:45:53,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:53,836 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:45:53,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:45:53,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1154694895, now seen corresponding path program 2 times [2022-12-13 18:45:53,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:45:53,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480560265] [2022-12-13 18:45:53,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:45:53,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:45:53,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:45:53,841 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:45:53,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 18:45:53,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:45:53,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:45:53,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 18:45:53,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:45:54,028 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:45:54,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:45:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:45:54,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:45:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:45:54,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:45:54,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480560265] [2022-12-13 18:45:54,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480560265] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:45:54,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:45:54,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 18:45:54,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26484739] [2022-12-13 18:45:54,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:45:54,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:45:54,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:45:54,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:45:54,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:45:58,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 505 [2022-12-13 18:45:58,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 244 flow. Second operand has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:45:58,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:45:58,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 505 [2022-12-13 18:45:58,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:46:00,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:46:02,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:46:03,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:46:05,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:46:08,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:46:10,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:46:12,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:46:19,469 INFO L130 PetriNetUnfolder]: 26334/35700 cut-off events. [2022-12-13 18:46:19,469 INFO L131 PetriNetUnfolder]: For 2949/2949 co-relation queries the response was YES. [2022-12-13 18:46:19,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91242 conditions, 35700 events. 26334/35700 cut-off events. For 2949/2949 co-relation queries the response was YES. Maximal size of possible extension queue 1546. Compared 216512 event pairs, 17090 based on Foata normal form. 18/13620 useless extension candidates. Maximal degree in co-relation 91223. Up to 19021 conditions per place. [2022-12-13 18:46:19,613 INFO L137 encePairwiseOnDemand]: 498/505 looper letters, 365 selfloop transitions, 32 changer transitions 0/398 dead transitions. [2022-12-13 18:46:19,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 398 transitions, 2076 flow [2022-12-13 18:46:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:46:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 18:46:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2713 transitions. [2022-12-13 18:46:19,619 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4476897689768977 [2022-12-13 18:46:19,619 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2713 transitions. [2022-12-13 18:46:19,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2713 transitions. [2022-12-13 18:46:19,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:46:19,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2713 transitions. [2022-12-13 18:46:19,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 226.08333333333334) internal successors, (2713), 12 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:19,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 505.0) internal successors, (6565), 13 states have internal predecessors, (6565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:19,628 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 505.0) internal successors, (6565), 13 states have internal predecessors, (6565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:19,628 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 244 flow. Second operand 12 states and 2713 transitions. [2022-12-13 18:46:19,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 398 transitions, 2076 flow [2022-12-13 18:46:19,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 398 transitions, 2070 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 18:46:19,634 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 482 flow [2022-12-13 18:46:19,634 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=482, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2022-12-13 18:46:19,634 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 19 predicate places. [2022-12-13 18:46:19,634 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 482 flow [2022-12-13 18:46:19,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:19,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:46:19,635 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:46:19,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 18:46:19,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:46:19,836 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:46:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:46:19,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1395199716, now seen corresponding path program 1 times [2022-12-13 18:46:19,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:46:19,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267905522] [2022-12-13 18:46:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:46:19,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:46:19,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:46:19,842 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:46:19,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 18:46:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:46:19,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 18:46:19,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:46:20,080 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:46:20,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:46:20,167 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:46:20,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:46:20,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:46:20,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:46:20,288 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:46:20,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:46:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:46:20,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:46:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:46:24,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:46:24,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267905522] [2022-12-13 18:46:24,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267905522] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:46:24,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:46:24,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 18:46:24,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149767887] [2022-12-13 18:46:24,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:46:24,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:46:24,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:46:24,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:46:24,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:46:26,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:46:29,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:46:30,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:46:34,044 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 505 [2022-12-13 18:46:34,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 482 flow. Second operand has 8 states, 8 states have (on average 182.5) internal successors, (1460), 8 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:46:34,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:46:34,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 505 [2022-12-13 18:46:34,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:46:43,996 WARN L233 SmtUtils]: Spent 7.13s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:46:46,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:47:04,014 INFO L130 PetriNetUnfolder]: 58776/80026 cut-off events. [2022-12-13 18:47:04,014 INFO L131 PetriNetUnfolder]: For 8019/8019 co-relation queries the response was YES. [2022-12-13 18:47:04,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203279 conditions, 80026 events. 58776/80026 cut-off events. For 8019/8019 co-relation queries the response was YES. Maximal size of possible extension queue 3396. Compared 541899 event pairs, 38230 based on Foata normal form. 0/32715 useless extension candidates. Maximal degree in co-relation 203252. Up to 41341 conditions per place. [2022-12-13 18:47:04,491 INFO L137 encePairwiseOnDemand]: 495/505 looper letters, 191 selfloop transitions, 31 changer transitions 1/224 dead transitions. [2022-12-13 18:47:04,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 224 transitions, 1563 flow [2022-12-13 18:47:04,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 18:47:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 18:47:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2898 transitions. [2022-12-13 18:47:04,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3825742574257426 [2022-12-13 18:47:04,500 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2898 transitions. [2022-12-13 18:47:04,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2898 transitions. [2022-12-13 18:47:04,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:04,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2898 transitions. [2022-12-13 18:47:04,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 193.2) internal successors, (2898), 15 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:04,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 505.0) internal successors, (8080), 16 states have internal predecessors, (8080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:04,516 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 505.0) internal successors, (8080), 16 states have internal predecessors, (8080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:04,516 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 482 flow. Second operand 15 states and 2898 transitions. [2022-12-13 18:47:04,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 224 transitions, 1563 flow [2022-12-13 18:47:04,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 224 transitions, 1452 flow, removed 28 selfloop flow, removed 4 redundant places. [2022-12-13 18:47:04,524 INFO L231 Difference]: Finished difference. Result has 94 places, 94 transitions, 683 flow [2022-12-13 18:47:04,525 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=683, PETRI_PLACES=94, PETRI_TRANSITIONS=94} [2022-12-13 18:47:04,525 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 35 predicate places. [2022-12-13 18:47:04,525 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 94 transitions, 683 flow [2022-12-13 18:47:04,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 182.5) internal successors, (1460), 8 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:04,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:04,526 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:47:04,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-13 18:47:04,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:04,728 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:47:04,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:04,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1395199717, now seen corresponding path program 1 times [2022-12-13 18:47:04,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:04,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188998056] [2022-12-13 18:47:04,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:47:04,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:04,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:04,735 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:04,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 18:47:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:47:04,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:47:04,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:04,951 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:47:04,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:47:04,991 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 18:47:04,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 18:47:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:47:05,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:47:05,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:47:05,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188998056] [2022-12-13 18:47:05,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188998056] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:47:05,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:47:05,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:47:05,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152263046] [2022-12-13 18:47:05,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:47:05,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:47:05,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:47:05,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:47:05,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:47:05,189 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 505 [2022-12-13 18:47:05,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 683 flow. Second operand has 4 states, 4 states have (on average 199.5) internal successors, (798), 4 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:05,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:47:05,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 505 [2022-12-13 18:47:05,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:47:11,552 INFO L130 PetriNetUnfolder]: 32986/46116 cut-off events. [2022-12-13 18:47:11,552 INFO L131 PetriNetUnfolder]: For 27911/27911 co-relation queries the response was YES. [2022-12-13 18:47:11,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128959 conditions, 46116 events. 32986/46116 cut-off events. For 27911/27911 co-relation queries the response was YES. Maximal size of possible extension queue 1986. Compared 302354 event pairs, 21780 based on Foata normal form. 0/25516 useless extension candidates. Maximal degree in co-relation 128925. Up to 46063 conditions per place. [2022-12-13 18:47:11,783 INFO L137 encePairwiseOnDemand]: 500/505 looper letters, 78 selfloop transitions, 12 changer transitions 0/91 dead transitions. [2022-12-13 18:47:11,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 91 transitions, 851 flow [2022-12-13 18:47:11,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:47:11,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:47:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 834 transitions. [2022-12-13 18:47:11,786 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41287128712871285 [2022-12-13 18:47:11,786 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 834 transitions. [2022-12-13 18:47:11,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 834 transitions. [2022-12-13 18:47:11,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:11,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 834 transitions. [2022-12-13 18:47:11,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 208.5) internal successors, (834), 4 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:11,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:11,790 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:11,790 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 683 flow. Second operand 4 states and 834 transitions. [2022-12-13 18:47:11,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 91 transitions, 851 flow [2022-12-13 18:47:11,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 91 transitions, 830 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 18:47:11,911 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 674 flow [2022-12-13 18:47:11,911 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=674, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2022-12-13 18:47:11,912 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 34 predicate places. [2022-12-13 18:47:11,912 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 674 flow [2022-12-13 18:47:11,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.5) internal successors, (798), 4 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:11,912 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:11,912 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:47:11,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 18:47:12,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:12,114 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:47:12,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:12,115 INFO L85 PathProgramCache]: Analyzing trace with hash -177006594, now seen corresponding path program 1 times [2022-12-13 18:47:12,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:12,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034642864] [2022-12-13 18:47:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:47:12,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:12,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:12,119 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:12,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 18:47:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:47:12,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:47:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:12,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:12,348 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-13 18:47:12,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-13 18:47:12,373 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 84 treesize of output 82 [2022-12-13 18:47:12,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:12,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 18:47:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:47:12,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:47:12,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:47:12,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034642864] [2022-12-13 18:47:12,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034642864] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:47:12,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:47:12,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:47:12,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919906832] [2022-12-13 18:47:12,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:47:12,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:47:12,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:47:12,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:47:12,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:47:12,923 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 505 [2022-12-13 18:47:12,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 674 flow. Second operand has 4 states, 4 states have (on average 203.75) internal successors, (815), 4 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:12,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:47:12,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 505 [2022-12-13 18:47:12,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:47:19,304 INFO L130 PetriNetUnfolder]: 31076/43326 cut-off events. [2022-12-13 18:47:19,304 INFO L131 PetriNetUnfolder]: For 26672/26672 co-relation queries the response was YES. [2022-12-13 18:47:19,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120972 conditions, 43326 events. 31076/43326 cut-off events. For 26672/26672 co-relation queries the response was YES. Maximal size of possible extension queue 1865. Compared 279921 event pairs, 20530 based on Foata normal form. 0/24546 useless extension candidates. Maximal degree in co-relation 120937. Up to 43286 conditions per place. [2022-12-13 18:47:19,542 INFO L137 encePairwiseOnDemand]: 502/505 looper letters, 87 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2022-12-13 18:47:19,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 89 transitions, 846 flow [2022-12-13 18:47:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:47:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:47:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2022-12-13 18:47:19,545 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42574257425742573 [2022-12-13 18:47:19,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2022-12-13 18:47:19,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2022-12-13 18:47:19,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:19,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2022-12-13 18:47:19,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:19,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:19,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:19,547 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 674 flow. Second operand 3 states and 645 transitions. [2022-12-13 18:47:19,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 89 transitions, 846 flow [2022-12-13 18:47:19,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 89 transitions, 833 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:47:19,662 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 659 flow [2022-12-13 18:47:19,662 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=659, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2022-12-13 18:47:19,663 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 32 predicate places. [2022-12-13 18:47:19,663 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 659 flow [2022-12-13 18:47:19,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.75) internal successors, (815), 4 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:19,663 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:19,663 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:47:19,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-12-13 18:47:19,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:19,865 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:47:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash -177006592, now seen corresponding path program 1 times [2022-12-13 18:47:19,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:19,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141360231] [2022-12-13 18:47:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:47:19,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:19,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:19,870 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:19,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 18:47:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:47:19,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 18:47:19,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:20,042 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 18:47:20,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-12-13 18:47:20,083 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 18:47:20,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 18:47:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:47:20,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:47:20,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:47:20,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141360231] [2022-12-13 18:47:20,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141360231] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:47:20,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:47:20,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:47:20,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377196304] [2022-12-13 18:47:20,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:47:20,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:47:20,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:47:20,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:47:20,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:47:20,224 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 505 [2022-12-13 18:47:20,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 659 flow. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:20,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:47:20,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 505 [2022-12-13 18:47:20,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:47:25,303 INFO L130 PetriNetUnfolder]: 29166/40536 cut-off events. [2022-12-13 18:47:25,303 INFO L131 PetriNetUnfolder]: For 25419/25419 co-relation queries the response was YES. [2022-12-13 18:47:25,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112982 conditions, 40536 events. 29166/40536 cut-off events. For 25419/25419 co-relation queries the response was YES. Maximal size of possible extension queue 1760. Compared 258566 event pairs, 19280 based on Foata normal form. 0/23576 useless extension candidates. Maximal degree in co-relation 112947. Up to 40496 conditions per place. [2022-12-13 18:47:25,511 INFO L137 encePairwiseOnDemand]: 502/505 looper letters, 85 selfloop transitions, 1 changer transitions 0/87 dead transitions. [2022-12-13 18:47:25,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 827 flow [2022-12-13 18:47:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:47:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:47:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2022-12-13 18:47:25,513 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42244224422442245 [2022-12-13 18:47:25,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2022-12-13 18:47:25,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2022-12-13 18:47:25,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:25,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2022-12-13 18:47:25,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:25,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:25,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:25,516 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 659 flow. Second operand 3 states and 640 transitions. [2022-12-13 18:47:25,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 827 flow [2022-12-13 18:47:25,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 87 transitions, 826 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:47:25,620 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 656 flow [2022-12-13 18:47:25,620 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=656, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2022-12-13 18:47:25,620 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 31 predicate places. [2022-12-13 18:47:25,620 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 656 flow [2022-12-13 18:47:25,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:25,621 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:25,621 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:47:25,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 18:47:25,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:25,822 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:47:25,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:25,824 INFO L85 PathProgramCache]: Analyzing trace with hash -749888076, now seen corresponding path program 1 times [2022-12-13 18:47:25,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:25,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488208271] [2022-12-13 18:47:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:47:25,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:25,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:25,828 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:25,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 18:47:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:47:25,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 18:47:25,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:47:25,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:47:25,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:47:25,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488208271] [2022-12-13 18:47:25,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488208271] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:47:25,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:47:25,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:47:25,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923633612] [2022-12-13 18:47:25,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:47:25,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:47:25,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:47:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:47:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:47:25,985 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 505 [2022-12-13 18:47:25,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 656 flow. Second operand has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:25,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:47:25,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 505 [2022-12-13 18:47:25,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:47:30,402 INFO L130 PetriNetUnfolder]: 22796/33156 cut-off events. [2022-12-13 18:47:30,402 INFO L131 PetriNetUnfolder]: For 15569/15569 co-relation queries the response was YES. [2022-12-13 18:47:30,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88813 conditions, 33156 events. 22796/33156 cut-off events. For 15569/15569 co-relation queries the response was YES. Maximal size of possible extension queue 1166. Compared 208379 event pairs, 4140 based on Foata normal form. 960/20896 useless extension candidates. Maximal degree in co-relation 88777. Up to 29561 conditions per place. [2022-12-13 18:47:30,595 INFO L137 encePairwiseOnDemand]: 498/505 looper letters, 98 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2022-12-13 18:47:30,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 102 transitions, 910 flow [2022-12-13 18:47:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:47:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:47:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 675 transitions. [2022-12-13 18:47:30,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44554455445544555 [2022-12-13 18:47:30,598 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 675 transitions. [2022-12-13 18:47:30,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 675 transitions. [2022-12-13 18:47:30,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:30,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 675 transitions. [2022-12-13 18:47:30,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:30,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:30,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:30,600 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 656 flow. Second operand 3 states and 675 transitions. [2022-12-13 18:47:30,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 102 transitions, 910 flow [2022-12-13 18:47:30,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 102 transitions, 909 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:47:30,687 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 684 flow [2022-12-13 18:47:30,687 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=684, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2022-12-13 18:47:30,688 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 33 predicate places. [2022-12-13 18:47:30,688 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 684 flow [2022-12-13 18:47:30,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:30,688 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:30,688 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:47:30,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 18:47:30,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:30,889 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:47:30,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:30,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1017254085, now seen corresponding path program 1 times [2022-12-13 18:47:30,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:30,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322804072] [2022-12-13 18:47:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:47:30,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:30,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:30,894 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:30,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 18:47:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:47:31,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 18:47:31,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:31,091 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 18:47:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:47:31,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:47:31,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:47:31,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322804072] [2022-12-13 18:47:31,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322804072] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:47:31,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:47:31,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:47:31,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644371832] [2022-12-13 18:47:31,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:47:31,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:47:31,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:47:31,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:47:31,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:47:31,384 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 505 [2022-12-13 18:47:31,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 684 flow. Second operand has 4 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:31,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:47:31,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 505 [2022-12-13 18:47:31,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:47:34,452 INFO L130 PetriNetUnfolder]: 16416/24016 cut-off events. [2022-12-13 18:47:34,452 INFO L131 PetriNetUnfolder]: For 18999/18999 co-relation queries the response was YES. [2022-12-13 18:47:34,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73035 conditions, 24016 events. 16416/24016 cut-off events. For 18999/18999 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 148580 event pairs, 10540 based on Foata normal form. 0/15736 useless extension candidates. Maximal degree in co-relation 72997. Up to 23904 conditions per place. [2022-12-13 18:47:34,590 INFO L137 encePairwiseOnDemand]: 501/505 looper letters, 69 selfloop transitions, 17 changer transitions 0/87 dead transitions. [2022-12-13 18:47:34,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 87 transitions, 848 flow [2022-12-13 18:47:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:47:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:47:34,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 827 transitions. [2022-12-13 18:47:34,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4094059405940594 [2022-12-13 18:47:34,593 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 827 transitions. [2022-12-13 18:47:34,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 827 transitions. [2022-12-13 18:47:34,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:34,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 827 transitions. [2022-12-13 18:47:34,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:34,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:34,596 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:34,596 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 684 flow. Second operand 4 states and 827 transitions. [2022-12-13 18:47:34,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 87 transitions, 848 flow [2022-12-13 18:47:34,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 87 transitions, 845 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:47:34,665 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 707 flow [2022-12-13 18:47:34,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=707, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2022-12-13 18:47:34,666 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 33 predicate places. [2022-12-13 18:47:34,666 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 707 flow [2022-12-13 18:47:34,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:34,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:34,666 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:47:34,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-13 18:47:34,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:34,867 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:47:34,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:34,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1017254086, now seen corresponding path program 1 times [2022-12-13 18:47:34,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:34,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754066681] [2022-12-13 18:47:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:47:34,870 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:34,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:34,873 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:34,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 18:47:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:47:35,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:47:35,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:47:35,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:47:35,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:47:35,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754066681] [2022-12-13 18:47:35,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754066681] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:47:35,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:47:35,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:47:35,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299938979] [2022-12-13 18:47:35,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:47:35,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:47:35,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:47:35,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:47:35,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:47:35,043 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 505 [2022-12-13 18:47:35,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 707 flow. Second operand has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:35,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:47:35,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 505 [2022-12-13 18:47:35,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:47:38,566 INFO L130 PetriNetUnfolder]: 18356/27116 cut-off events. [2022-12-13 18:47:38,566 INFO L131 PetriNetUnfolder]: For 24635/24635 co-relation queries the response was YES. [2022-12-13 18:47:38,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83960 conditions, 27116 events. 18356/27116 cut-off events. For 24635/24635 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 170273 event pairs, 5700 based on Foata normal form. 1220/19416 useless extension candidates. Maximal degree in co-relation 83921. Up to 17101 conditions per place. [2022-12-13 18:47:38,722 INFO L137 encePairwiseOnDemand]: 499/505 looper letters, 96 selfloop transitions, 3 changer transitions 2/102 dead transitions. [2022-12-13 18:47:38,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 102 transitions, 983 flow [2022-12-13 18:47:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:47:38,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:47:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2022-12-13 18:47:38,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44356435643564357 [2022-12-13 18:47:38,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2022-12-13 18:47:38,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2022-12-13 18:47:38,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:38,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2022-12-13 18:47:38,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:38,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:38,727 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:38,727 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 707 flow. Second operand 3 states and 672 transitions. [2022-12-13 18:47:38,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 102 transitions, 983 flow [2022-12-13 18:47:38,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 102 transitions, 965 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:47:38,787 INFO L231 Difference]: Finished difference. Result has 93 places, 87 transitions, 698 flow [2022-12-13 18:47:38,787 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=698, PETRI_PLACES=93, PETRI_TRANSITIONS=87} [2022-12-13 18:47:38,787 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 34 predicate places. [2022-12-13 18:47:38,788 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 87 transitions, 698 flow [2022-12-13 18:47:38,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:38,788 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:38,788 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 18:47:38,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 18:47:38,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:38,990 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:47:38,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:38,991 INFO L85 PathProgramCache]: Analyzing trace with hash -249048217, now seen corresponding path program 2 times [2022-12-13 18:47:38,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:38,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148397136] [2022-12-13 18:47:38,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:47:38,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:38,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:38,995 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:38,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 18:47:39,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 18:47:39,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:47:39,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 18:47:39,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:39,453 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:47:39,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:47:39,603 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 18:47:39,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 18:47:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:47:39,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:47:39,758 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 18:47:39,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 18:47:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:47:39,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:47:39,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:47:39,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148397136] [2022-12-13 18:47:39,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148397136] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:47:39,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:47:39,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:47:39,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258632059] [2022-12-13 18:47:39,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:47:39,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:47:39,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:47:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:47:39,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:47:40,215 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 505 [2022-12-13 18:47:40,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 87 transitions, 698 flow. Second operand has 4 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:40,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:47:40,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 505 [2022-12-13 18:47:40,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:47:42,984 INFO L130 PetriNetUnfolder]: 13242/19610 cut-off events. [2022-12-13 18:47:42,984 INFO L131 PetriNetUnfolder]: For 22659/22659 co-relation queries the response was YES. [2022-12-13 18:47:43,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61157 conditions, 19610 events. 13242/19610 cut-off events. For 22659/22659 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 116691 event pairs, 6806 based on Foata normal form. 1230/14210 useless extension candidates. Maximal degree in co-relation 61117. Up to 19559 conditions per place. [2022-12-13 18:47:43,081 INFO L137 encePairwiseOnDemand]: 500/505 looper letters, 71 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2022-12-13 18:47:43,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 84 transitions, 832 flow [2022-12-13 18:47:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:47:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:47:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 805 transitions. [2022-12-13 18:47:43,084 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39851485148514854 [2022-12-13 18:47:43,084 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 805 transitions. [2022-12-13 18:47:43,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 805 transitions. [2022-12-13 18:47:43,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:43,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 805 transitions. [2022-12-13 18:47:43,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:43,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:43,087 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:43,087 INFO L175 Difference]: Start difference. First operand has 93 places, 87 transitions, 698 flow. Second operand 4 states and 805 transitions. [2022-12-13 18:47:43,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 84 transitions, 832 flow [2022-12-13 18:47:43,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 84 transitions, 814 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 18:47:43,098 INFO L231 Difference]: Finished difference. Result has 90 places, 84 transitions, 672 flow [2022-12-13 18:47:43,098 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=672, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2022-12-13 18:47:43,098 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 31 predicate places. [2022-12-13 18:47:43,098 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 672 flow [2022-12-13 18:47:43,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:43,099 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:43,099 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:47:43,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 18:47:43,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:43,300 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:47:43,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:43,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1583295438, now seen corresponding path program 1 times [2022-12-13 18:47:43,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:43,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941140435] [2022-12-13 18:47:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:47:43,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:43,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:43,305 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:43,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 18:47:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:47:43,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:47:43,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:47:43,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:47:43,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:47:43,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941140435] [2022-12-13 18:47:43,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941140435] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:47:43,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:47:43,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:47:43,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916244906] [2022-12-13 18:47:43,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:47:43,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:47:43,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:47:43,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:47:43,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:47:43,660 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 505 [2022-12-13 18:47:43,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 84 transitions, 672 flow. Second operand has 4 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:43,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:47:43,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 505 [2022-12-13 18:47:43,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:47:46,281 INFO L130 PetriNetUnfolder]: 12264/18218 cut-off events. [2022-12-13 18:47:46,281 INFO L131 PetriNetUnfolder]: For 4972/4972 co-relation queries the response was YES. [2022-12-13 18:47:46,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49802 conditions, 18218 events. 12264/18218 cut-off events. For 4972/4972 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 107654 event pairs, 6350 based on Foata normal form. 48/12221 useless extension candidates. Maximal degree in co-relation 49763. Up to 17630 conditions per place. [2022-12-13 18:47:46,394 INFO L137 encePairwiseOnDemand]: 499/505 looper letters, 68 selfloop transitions, 14 changer transitions 18/101 dead transitions. [2022-12-13 18:47:46,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 101 transitions, 938 flow [2022-12-13 18:47:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:47:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:47:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 852 transitions. [2022-12-13 18:47:46,396 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42178217821782177 [2022-12-13 18:47:46,396 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 852 transitions. [2022-12-13 18:47:46,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 852 transitions. [2022-12-13 18:47:46,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:46,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 852 transitions. [2022-12-13 18:47:46,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:46,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:46,399 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:46,399 INFO L175 Difference]: Start difference. First operand has 90 places, 84 transitions, 672 flow. Second operand 4 states and 852 transitions. [2022-12-13 18:47:46,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 101 transitions, 938 flow [2022-12-13 18:47:46,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 101 transitions, 925 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:47:46,405 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 706 flow [2022-12-13 18:47:46,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=706, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2022-12-13 18:47:46,406 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 34 predicate places. [2022-12-13 18:47:46,406 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 706 flow [2022-12-13 18:47:46,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:46,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:46,406 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:47:46,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-12-13 18:47:46,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:46,607 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:47:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:46,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1902318923, now seen corresponding path program 1 times [2022-12-13 18:47:46,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:46,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801469124] [2022-12-13 18:47:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:47:46,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:46,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:46,609 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:46,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 18:47:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:47:46,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 18:47:46,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:46,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 18:47:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:47:46,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:47:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:47:47,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:47:47,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801469124] [2022-12-13 18:47:47,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801469124] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:47:47,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:47:47,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 18:47:47,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111657638] [2022-12-13 18:47:47,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:47:47,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:47:47,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:47:47,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:47:47,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:47:53,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 505 [2022-12-13 18:47:53,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 706 flow. Second operand has 8 states, 8 states have (on average 188.5) internal successors, (1508), 8 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:53,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:47:53,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 505 [2022-12-13 18:47:53,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:47:58,799 INFO L130 PetriNetUnfolder]: 10683/15857 cut-off events. [2022-12-13 18:47:58,799 INFO L131 PetriNetUnfolder]: For 7247/7247 co-relation queries the response was YES. [2022-12-13 18:47:58,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45050 conditions, 15857 events. 10683/15857 cut-off events. For 7247/7247 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 91895 event pairs, 5447 based on Foata normal form. 342/11981 useless extension candidates. Maximal degree in co-relation 45010. Up to 11773 conditions per place. [2022-12-13 18:47:58,897 INFO L137 encePairwiseOnDemand]: 498/505 looper letters, 102 selfloop transitions, 32 changer transitions 0/135 dead transitions. [2022-12-13 18:47:58,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 135 transitions, 1168 flow [2022-12-13 18:47:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:47:58,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 18:47:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1571 transitions. [2022-12-13 18:47:58,902 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3888613861386139 [2022-12-13 18:47:58,902 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1571 transitions. [2022-12-13 18:47:58,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1571 transitions. [2022-12-13 18:47:58,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:47:58,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1571 transitions. [2022-12-13 18:47:58,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 196.375) internal successors, (1571), 8 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:58,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 505.0) internal successors, (4545), 9 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:58,907 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 505.0) internal successors, (4545), 9 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:58,907 INFO L175 Difference]: Start difference. First operand has 93 places, 83 transitions, 706 flow. Second operand 8 states and 1571 transitions. [2022-12-13 18:47:58,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 135 transitions, 1168 flow [2022-12-13 18:47:59,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 135 transitions, 1121 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-12-13 18:47:59,036 INFO L231 Difference]: Finished difference. Result has 98 places, 85 transitions, 770 flow [2022-12-13 18:47:59,036 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=770, PETRI_PLACES=98, PETRI_TRANSITIONS=85} [2022-12-13 18:47:59,037 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 39 predicate places. [2022-12-13 18:47:59,037 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 85 transitions, 770 flow [2022-12-13 18:47:59,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 188.5) internal successors, (1508), 8 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:47:59,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:47:59,037 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 18:47:59,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 18:47:59,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:59,239 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:47:59,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:47:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash 822240497, now seen corresponding path program 3 times [2022-12-13 18:47:59,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:47:59,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060671544] [2022-12-13 18:47:59,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:47:59,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:47:59,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:47:59,244 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:47:59,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 18:47:59,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 18:47:59,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:47:59,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 18:47:59,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:47:59,571 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:47:59,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:48:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:48:00,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:48:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:48:02,976 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:48:02,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060671544] [2022-12-13 18:48:02,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060671544] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:48:02,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:48:02,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 18:48:02,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420377715] [2022-12-13 18:48:02,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:48:02,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 18:48:02,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:48:02,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 18:48:02,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 18:48:22,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 505 [2022-12-13 18:48:22,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 85 transitions, 770 flow. Second operand has 24 states, 24 states have (on average 193.0) internal successors, (4632), 24 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:48:22,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:48:22,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 505 [2022-12-13 18:48:22,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:48:31,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:33,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:35,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:37,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:40,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:42,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:44,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:46,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:48,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:48:50,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:49:05,512 INFO L130 PetriNetUnfolder]: 14667/21767 cut-off events. [2022-12-13 18:49:05,512 INFO L131 PetriNetUnfolder]: For 15587/15587 co-relation queries the response was YES. [2022-12-13 18:49:05,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63376 conditions, 21767 events. 14667/21767 cut-off events. For 15587/15587 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 130714 event pairs, 7493 based on Foata normal form. 24/16694 useless extension candidates. Maximal degree in co-relation 63336. Up to 8083 conditions per place. [2022-12-13 18:49:05,652 INFO L137 encePairwiseOnDemand]: 498/505 looper letters, 361 selfloop transitions, 65 changer transitions 0/427 dead transitions. [2022-12-13 18:49:05,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 427 transitions, 3164 flow [2022-12-13 18:49:05,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 18:49:05,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 18:49:05,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4969 transitions. [2022-12-13 18:49:05,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.409983498349835 [2022-12-13 18:49:05,662 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4969 transitions. [2022-12-13 18:49:05,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4969 transitions. [2022-12-13 18:49:05,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:49:05,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4969 transitions. [2022-12-13 18:49:05,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 207.04166666666666) internal successors, (4969), 24 states have internal predecessors, (4969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:05,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 505.0) internal successors, (12625), 25 states have internal predecessors, (12625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:05,679 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 505.0) internal successors, (12625), 25 states have internal predecessors, (12625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:05,679 INFO L175 Difference]: Start difference. First operand has 98 places, 85 transitions, 770 flow. Second operand 24 states and 4969 transitions. [2022-12-13 18:49:05,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 427 transitions, 3164 flow [2022-12-13 18:49:05,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 427 transitions, 3006 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 18:49:05,717 INFO L231 Difference]: Finished difference. Result has 129 places, 115 transitions, 1150 flow [2022-12-13 18:49:05,717 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1150, PETRI_PLACES=129, PETRI_TRANSITIONS=115} [2022-12-13 18:49:05,717 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 70 predicate places. [2022-12-13 18:49:05,717 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 115 transitions, 1150 flow [2022-12-13 18:49:05,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 193.0) internal successors, (4632), 24 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:05,717 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:49:05,718 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:49:05,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 18:49:05,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:49:05,919 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:49:05,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:49:05,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2057949287, now seen corresponding path program 2 times [2022-12-13 18:49:05,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:49:05,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087908334] [2022-12-13 18:49:05,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:49:05,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:49:05,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:49:05,925 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:49:05,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 18:49:06,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 18:49:06,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:49:06,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 18:49:06,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:49:06,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 18:49:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 18:49:06,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:49:06,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:49:06,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087908334] [2022-12-13 18:49:06,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087908334] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:49:06,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:49:06,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:49:06,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686212628] [2022-12-13 18:49:06,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:49:06,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:49:06,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:49:06,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:49:06,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:49:06,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 505 [2022-12-13 18:49:06,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 115 transitions, 1150 flow. Second operand has 4 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:06,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:49:06,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 505 [2022-12-13 18:49:06,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:49:08,924 INFO L130 PetriNetUnfolder]: 10941/16313 cut-off events. [2022-12-13 18:49:08,925 INFO L131 PetriNetUnfolder]: For 12981/12981 co-relation queries the response was YES. [2022-12-13 18:49:08,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44765 conditions, 16313 events. 10941/16313 cut-off events. For 12981/12981 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 95450 event pairs, 5441 based on Foata normal form. 1566/13667 useless extension candidates. Maximal degree in co-relation 44712. Up to 16158 conditions per place. [2022-12-13 18:49:09,020 INFO L137 encePairwiseOnDemand]: 501/505 looper letters, 71 selfloop transitions, 41 changer transitions 0/113 dead transitions. [2022-12-13 18:49:09,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 113 transitions, 1358 flow [2022-12-13 18:49:09,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:49:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:49:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 822 transitions. [2022-12-13 18:49:09,022 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4069306930693069 [2022-12-13 18:49:09,022 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 822 transitions. [2022-12-13 18:49:09,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 822 transitions. [2022-12-13 18:49:09,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:49:09,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 822 transitions. [2022-12-13 18:49:09,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.5) internal successors, (822), 4 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:09,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:09,025 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:09,025 INFO L175 Difference]: Start difference. First operand has 129 places, 115 transitions, 1150 flow. Second operand 4 states and 822 transitions. [2022-12-13 18:49:09,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 113 transitions, 1358 flow [2022-12-13 18:49:09,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 113 transitions, 1195 flow, removed 35 selfloop flow, removed 12 redundant places. [2022-12-13 18:49:09,037 INFO L231 Difference]: Finished difference. Result has 118 places, 113 transitions, 1053 flow [2022-12-13 18:49:09,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1053, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2022-12-13 18:49:09,037 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 59 predicate places. [2022-12-13 18:49:09,037 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 1053 flow [2022-12-13 18:49:09,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:09,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:49:09,038 INFO L209 CegarLoopForPetriNet]: trace histogram [13, 1, 1, 1] [2022-12-13 18:49:09,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-13 18:49:09,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:49:09,239 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:49:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:49:09,240 INFO L85 PathProgramCache]: Analyzing trace with hash 430683447, now seen corresponding path program 1 times [2022-12-13 18:49:09,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:49:09,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654465] [2022-12-13 18:49:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:49:09,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:49:09,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:49:09,244 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:49:09,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 18:49:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:49:09,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 18:49:09,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:49:09,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 18:49:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:49:10,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:49:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:49:15,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:49:15,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654465] [2022-12-13 18:49:15,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654465] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:49:15,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:49:15,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2022-12-13 18:49:15,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505377516] [2022-12-13 18:49:15,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:49:15,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 18:49:15,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:49:15,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 18:49:15,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2022-12-13 18:49:52,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 505 [2022-12-13 18:49:52,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 1053 flow. Second operand has 30 states, 30 states have (on average 191.03333333333333) internal successors, (5731), 30 states have internal predecessors, (5731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:49:52,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:49:52,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 505 [2022-12-13 18:49:52,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:50:06,331 WARN L233 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:50:08,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:50:10,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:50:12,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:50:14,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:50:16,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:50:19,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:50:21,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:50:23,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:50:25,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:50:27,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:50:29,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:50:31,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:50:33,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:50:41,118 WARN L233 SmtUtils]: Spent 7.38s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:50:49,208 WARN L233 SmtUtils]: Spent 6.86s on a formula simplification that was a NOOP. DAG size: 135 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:50:56,816 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:51:29,546 INFO L130 PetriNetUnfolder]: 23685/35305 cut-off events. [2022-12-13 18:51:29,547 INFO L131 PetriNetUnfolder]: For 18581/18581 co-relation queries the response was YES. [2022-12-13 18:51:29,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96443 conditions, 35305 events. 23685/35305 cut-off events. For 18581/18581 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 216294 event pairs, 11797 based on Foata normal form. 60/26314 useless extension candidates. Maximal degree in co-relation 96392. Up to 12013 conditions per place. [2022-12-13 18:51:29,747 INFO L137 encePairwiseOnDemand]: 499/505 looper letters, 742 selfloop transitions, 76 changer transitions 0/819 dead transitions. [2022-12-13 18:51:29,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 819 transitions, 5820 flow [2022-12-13 18:51:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 18:51:29,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 18:51:29,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6353 transitions. [2022-12-13 18:51:29,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41933993399339936 [2022-12-13 18:51:29,757 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6353 transitions. [2022-12-13 18:51:29,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6353 transitions. [2022-12-13 18:51:29,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:51:29,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6353 transitions. [2022-12-13 18:51:29,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 211.76666666666668) internal successors, (6353), 30 states have internal predecessors, (6353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:29,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 505.0) internal successors, (15655), 31 states have internal predecessors, (15655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:29,775 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 505.0) internal successors, (15655), 31 states have internal predecessors, (15655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:29,775 INFO L175 Difference]: Start difference. First operand has 118 places, 113 transitions, 1053 flow. Second operand 30 states and 6353 transitions. [2022-12-13 18:51:29,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 819 transitions, 5820 flow [2022-12-13 18:51:29,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 819 transitions, 5690 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:51:29,806 INFO L231 Difference]: Finished difference. Result has 161 places, 134 transitions, 1486 flow [2022-12-13 18:51:29,806 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1486, PETRI_PLACES=161, PETRI_TRANSITIONS=134} [2022-12-13 18:51:29,807 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 102 predicate places. [2022-12-13 18:51:29,807 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 134 transitions, 1486 flow [2022-12-13 18:51:29,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 191.03333333333333) internal successors, (5731), 30 states have internal predecessors, (5731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:29,808 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:51:29,808 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:51:29,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-12-13 18:51:30,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:51:30,009 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:51:30,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:30,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2145283203, now seen corresponding path program 1 times [2022-12-13 18:51:30,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:51:30,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448978756] [2022-12-13 18:51:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:30,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:51:30,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:51:30,016 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:51:30,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 18:51:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:51:30,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:51:30,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:51:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:51:30,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:51:30,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:51:30,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448978756] [2022-12-13 18:51:30,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448978756] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:51:30,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:51:30,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 18:51:30,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867603559] [2022-12-13 18:51:30,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:51:30,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 18:51:30,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:51:30,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 18:51:30,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:51:30,963 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 505 [2022-12-13 18:51:30,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 134 transitions, 1486 flow. Second operand has 9 states, 9 states have (on average 197.66666666666666) internal successors, (1779), 9 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:30,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:51:30,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 505 [2022-12-13 18:51:30,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:51:40,196 INFO L130 PetriNetUnfolder]: 33935/52588 cut-off events. [2022-12-13 18:51:40,196 INFO L131 PetriNetUnfolder]: For 12112/12112 co-relation queries the response was YES. [2022-12-13 18:51:40,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139472 conditions, 52588 events. 33935/52588 cut-off events. For 12112/12112 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 368006 event pairs, 2437 based on Foata normal form. 78/40810 useless extension candidates. Maximal degree in co-relation 139404. Up to 35569 conditions per place. [2022-12-13 18:51:40,627 INFO L137 encePairwiseOnDemand]: 494/505 looper letters, 144 selfloop transitions, 39 changer transitions 3/186 dead transitions. [2022-12-13 18:51:40,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 186 transitions, 2003 flow [2022-12-13 18:51:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:51:40,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 18:51:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1839 transitions. [2022-12-13 18:51:40,631 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4046204620462046 [2022-12-13 18:51:40,631 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1839 transitions. [2022-12-13 18:51:40,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1839 transitions. [2022-12-13 18:51:40,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:51:40,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1839 transitions. [2022-12-13 18:51:40,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 204.33333333333334) internal successors, (1839), 9 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:40,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 505.0) internal successors, (5050), 10 states have internal predecessors, (5050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:40,636 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 505.0) internal successors, (5050), 10 states have internal predecessors, (5050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:40,636 INFO L175 Difference]: Start difference. First operand has 161 places, 134 transitions, 1486 flow. Second operand 9 states and 1839 transitions. [2022-12-13 18:51:40,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 186 transitions, 2003 flow [2022-12-13 18:51:40,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 186 transitions, 1881 flow, removed 17 selfloop flow, removed 12 redundant places. [2022-12-13 18:51:40,664 INFO L231 Difference]: Finished difference. Result has 160 places, 145 transitions, 1513 flow [2022-12-13 18:51:40,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1513, PETRI_PLACES=160, PETRI_TRANSITIONS=145} [2022-12-13 18:51:40,664 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 101 predicate places. [2022-12-13 18:51:40,665 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 145 transitions, 1513 flow [2022-12-13 18:51:40,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 197.66666666666666) internal successors, (1779), 9 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:40,665 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:51:40,665 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2022-12-13 18:51:40,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-12-13 18:51:40,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:51:40,866 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:51:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:40,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1838910287, now seen corresponding path program 4 times [2022-12-13 18:51:40,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:51:40,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843238598] [2022-12-13 18:51:40,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:51:40,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:51:40,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:51:40,872 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:51:40,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 18:51:41,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:51:41,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:51:41,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 18:51:41,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:51:41,157 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 18:51:41,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 18:51:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:51:42,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:51:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:51:54,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:51:54,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843238598] [2022-12-13 18:51:54,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843238598] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:51:54,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:51:54,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2022-12-13 18:51:54,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332126759] [2022-12-13 18:51:54,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:51:54,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 18:51:54,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:51:54,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 18:51:54,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 18:53:34,701 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 505 [2022-12-13 18:53:34,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 145 transitions, 1513 flow. Second operand has 48 states, 48 states have (on average 193.0) internal successors, (9264), 48 states have internal predecessors, (9264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:34,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:34,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 505 [2022-12-13 18:53:34,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:54:08,601 WARN L233 SmtUtils]: Spent 15.40s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:54:23,735 WARN L233 SmtUtils]: Spent 12.46s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:54:26,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:28,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:30,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:32,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:34,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:36,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:38,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:40,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:42,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:44,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:46,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:48,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:50,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:52,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:54,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:56,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:54:58,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:55:00,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:55:03,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:55:05,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:55:07,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:55:09,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 18:55:23,084 WARN L233 SmtUtils]: Spent 12.56s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:55:36,432 WARN L233 SmtUtils]: Spent 10.58s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:55:47,704 WARN L233 SmtUtils]: Spent 8.68s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:55:58,554 WARN L233 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:56:08,104 WARN L233 SmtUtils]: Spent 7.12s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:56:16,959 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:56:25,265 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:56:33,668 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:57:07,786 INFO L130 PetriNetUnfolder]: 31899/49237 cut-off events. [2022-12-13 18:57:07,786 INFO L131 PetriNetUnfolder]: For 53275/53275 co-relation queries the response was YES. [2022-12-13 18:57:08,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159789 conditions, 49237 events. 31899/49237 cut-off events. For 53275/53275 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 338192 event pairs, 17647 based on Foata normal form. 24/39589 useless extension candidates. Maximal degree in co-relation 159717. Up to 14665 conditions per place. [2022-12-13 18:57:08,185 INFO L137 encePairwiseOnDemand]: 499/505 looper letters, 944 selfloop transitions, 130 changer transitions 0/1075 dead transitions. [2022-12-13 18:57:08,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 1075 transitions, 9239 flow [2022-12-13 18:57:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 18:57:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-13 18:57:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 9890 transitions. [2022-12-13 18:57:08,196 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.408003300330033 [2022-12-13 18:57:08,196 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 9890 transitions. [2022-12-13 18:57:08,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 9890 transitions. [2022-12-13 18:57:08,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:08,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 9890 transitions. [2022-12-13 18:57:08,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 206.04166666666666) internal successors, (9890), 48 states have internal predecessors, (9890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:08,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 505.0) internal successors, (24745), 49 states have internal predecessors, (24745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:08,223 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 505.0) internal successors, (24745), 49 states have internal predecessors, (24745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:08,223 INFO L175 Difference]: Start difference. First operand has 160 places, 145 transitions, 1513 flow. Second operand 48 states and 9890 transitions. [2022-12-13 18:57:08,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 1075 transitions, 9239 flow [2022-12-13 18:57:09,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 1075 transitions, 8648 flow, removed 192 selfloop flow, removed 3 redundant places. [2022-12-13 18:57:09,571 INFO L231 Difference]: Finished difference. Result has 229 places, 196 transitions, 2396 flow [2022-12-13 18:57:09,571 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2396, PETRI_PLACES=229, PETRI_TRANSITIONS=196} [2022-12-13 18:57:09,572 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 170 predicate places. [2022-12-13 18:57:09,572 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 196 transitions, 2396 flow [2022-12-13 18:57:09,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 193.0) internal successors, (9264), 48 states have internal predecessors, (9264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:09,573 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:57:09,573 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:09,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-13 18:57:09,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:57:09,774 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:57:09,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:09,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1640490993, now seen corresponding path program 2 times [2022-12-13 18:57:09,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:57:09,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668978366] [2022-12-13 18:57:09,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:57:09,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:57:09,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:57:09,780 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:57:09,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-13 18:57:09,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 18:57:09,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:57:09,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:57:09,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:57:10,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:57:10,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:57:10,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668978366] [2022-12-13 18:57:10,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668978366] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:57:10,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:57:10,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 18:57:10,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820085297] [2022-12-13 18:57:10,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:57:10,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 18:57:10,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:57:10,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 18:57:10,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:57:10,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 505 [2022-12-13 18:57:10,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 196 transitions, 2396 flow. Second operand has 9 states, 9 states have (on average 197.66666666666666) internal successors, (1779), 9 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:10,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:57:10,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 505 [2022-12-13 18:57:10,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:57:23,737 INFO L130 PetriNetUnfolder]: 42695/66286 cut-off events. [2022-12-13 18:57:23,737 INFO L131 PetriNetUnfolder]: For 36318/36318 co-relation queries the response was YES. [2022-12-13 18:57:24,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207784 conditions, 66286 events. 42695/66286 cut-off events. For 36318/36318 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 477750 event pairs, 5089 based on Foata normal form. 78/53104 useless extension candidates. Maximal degree in co-relation 207687. Up to 42433 conditions per place. [2022-12-13 18:57:24,585 INFO L137 encePairwiseOnDemand]: 494/505 looper letters, 198 selfloop transitions, 50 changer transitions 3/251 dead transitions. [2022-12-13 18:57:24,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 251 transitions, 3077 flow [2022-12-13 18:57:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:57:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 18:57:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1845 transitions. [2022-12-13 18:57:24,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40594059405940597 [2022-12-13 18:57:24,588 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1845 transitions. [2022-12-13 18:57:24,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1845 transitions. [2022-12-13 18:57:24,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:24,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1845 transitions. [2022-12-13 18:57:24,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:24,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 505.0) internal successors, (5050), 10 states have internal predecessors, (5050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:24,593 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 505.0) internal successors, (5050), 10 states have internal predecessors, (5050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:24,593 INFO L175 Difference]: Start difference. First operand has 229 places, 196 transitions, 2396 flow. Second operand 9 states and 1845 transitions. [2022-12-13 18:57:24,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 251 transitions, 3077 flow [2022-12-13 18:57:27,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 251 transitions, 2782 flow, removed 69 selfloop flow, removed 21 redundant places. [2022-12-13 18:57:27,115 INFO L231 Difference]: Finished difference. Result has 218 places, 207 transitions, 2293 flow [2022-12-13 18:57:27,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2293, PETRI_PLACES=218, PETRI_TRANSITIONS=207} [2022-12-13 18:57:27,115 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 159 predicate places. [2022-12-13 18:57:27,115 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 207 transitions, 2293 flow [2022-12-13 18:57:27,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 197.66666666666666) internal successors, (1779), 9 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:27,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:57:27,115 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:27,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 18:57:27,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:57:27,317 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:57:27,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:27,318 INFO L85 PathProgramCache]: Analyzing trace with hash -164587557, now seen corresponding path program 3 times [2022-12-13 18:57:27,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:57:27,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380224533] [2022-12-13 18:57:27,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:57:27,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:57:27,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:57:27,323 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:57:27,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-13 18:57:27,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 18:57:27,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:57:27,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:57:27,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:57:28,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:57:28,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:57:28,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380224533] [2022-12-13 18:57:28,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380224533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:57:28,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:57:28,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 18:57:28,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192637554] [2022-12-13 18:57:28,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:57:28,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 18:57:28,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:57:28,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 18:57:28,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:57:28,326 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 505 [2022-12-13 18:57:28,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 207 transitions, 2293 flow. Second operand has 9 states, 9 states have (on average 196.66666666666666) internal successors, (1770), 9 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:28,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:57:28,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 505 [2022-12-13 18:57:28,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:57:42,605 INFO L130 PetriNetUnfolder]: 46083/72243 cut-off events. [2022-12-13 18:57:42,605 INFO L131 PetriNetUnfolder]: For 91099/91099 co-relation queries the response was YES. [2022-12-13 18:57:43,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268943 conditions, 72243 events. 46083/72243 cut-off events. For 91099/91099 co-relation queries the response was YES. Maximal size of possible extension queue 1065. Compared 529290 event pairs, 13335 based on Foata normal form. 75/58668 useless extension candidates. Maximal degree in co-relation 268843. Up to 60526 conditions per place. [2022-12-13 18:57:43,629 INFO L137 encePairwiseOnDemand]: 494/505 looper letters, 202 selfloop transitions, 44 changer transitions 3/249 dead transitions. [2022-12-13 18:57:43,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 249 transitions, 2978 flow [2022-12-13 18:57:43,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:57:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 18:57:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1820 transitions. [2022-12-13 18:57:43,633 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4004400440044004 [2022-12-13 18:57:43,633 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1820 transitions. [2022-12-13 18:57:43,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1820 transitions. [2022-12-13 18:57:43,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:57:43,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1820 transitions. [2022-12-13 18:57:43,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 202.22222222222223) internal successors, (1820), 9 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:43,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 505.0) internal successors, (5050), 10 states have internal predecessors, (5050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:43,639 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 505.0) internal successors, (5050), 10 states have internal predecessors, (5050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:43,639 INFO L175 Difference]: Start difference. First operand has 218 places, 207 transitions, 2293 flow. Second operand 9 states and 1820 transitions. [2022-12-13 18:57:43,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 249 transitions, 2978 flow [2022-12-13 18:57:53,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 249 transitions, 2856 flow, removed 24 selfloop flow, removed 4 redundant places. [2022-12-13 18:57:54,001 INFO L231 Difference]: Finished difference. Result has 227 places, 221 transitions, 2444 flow [2022-12-13 18:57:54,002 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=2189, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2444, PETRI_PLACES=227, PETRI_TRANSITIONS=221} [2022-12-13 18:57:54,002 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 168 predicate places. [2022-12-13 18:57:54,002 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 221 transitions, 2444 flow [2022-12-13 18:57:54,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 196.66666666666666) internal successors, (1770), 9 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:54,002 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:57:54,002 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:54,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-13 18:57:54,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:57:54,204 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:57:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash -307057587, now seen corresponding path program 4 times [2022-12-13 18:57:54,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:57:54,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954780975] [2022-12-13 18:57:54,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:57:54,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:57:54,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:57:54,209 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:57:54,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-13 18:57:54,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:57:54,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:57:54,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:57:54,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:57:55,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:57:55,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:57:55,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954780975] [2022-12-13 18:57:55,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954780975] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:57:55,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:57:55,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 18:57:55,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949889220] [2022-12-13 18:57:55,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:57:55,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 18:57:55,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:57:55,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 18:57:55,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:57:55,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 505 [2022-12-13 18:57:55,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 221 transitions, 2444 flow. Second operand has 9 states, 9 states have (on average 196.66666666666666) internal successors, (1770), 9 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:57:55,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:57:55,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 505 [2022-12-13 18:57:55,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:58:11,022 INFO L130 PetriNetUnfolder]: 46758/74043 cut-off events. [2022-12-13 18:58:11,022 INFO L131 PetriNetUnfolder]: For 98630/98630 co-relation queries the response was YES. [2022-12-13 18:58:11,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281804 conditions, 74043 events. 46758/74043 cut-off events. For 98630/98630 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 555353 event pairs, 13893 based on Foata normal form. 75/61218 useless extension candidates. Maximal degree in co-relation 281698. Up to 62326 conditions per place. [2022-12-13 18:58:12,142 INFO L137 encePairwiseOnDemand]: 494/505 looper letters, 212 selfloop transitions, 45 changer transitions 3/260 dead transitions. [2022-12-13 18:58:12,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 260 transitions, 3114 flow [2022-12-13 18:58:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:58:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 18:58:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1822 transitions. [2022-12-13 18:58:12,145 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40088008800880087 [2022-12-13 18:58:12,145 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1822 transitions. [2022-12-13 18:58:12,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1822 transitions. [2022-12-13 18:58:12,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:58:12,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1822 transitions. [2022-12-13 18:58:12,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 202.44444444444446) internal successors, (1822), 9 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:58:12,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 505.0) internal successors, (5050), 10 states have internal predecessors, (5050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:58:12,150 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 505.0) internal successors, (5050), 10 states have internal predecessors, (5050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:58:12,151 INFO L175 Difference]: Start difference. First operand has 227 places, 221 transitions, 2444 flow. Second operand 9 states and 1822 transitions. [2022-12-13 18:58:12,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 260 transitions, 3114 flow [2022-12-13 18:58:21,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 260 transitions, 3045 flow, removed 15 selfloop flow, removed 2 redundant places. [2022-12-13 18:58:21,879 INFO L231 Difference]: Finished difference. Result has 237 places, 228 transitions, 2570 flow [2022-12-13 18:58:21,880 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2570, PETRI_PLACES=237, PETRI_TRANSITIONS=228} [2022-12-13 18:58:21,880 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 178 predicate places. [2022-12-13 18:58:21,880 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 228 transitions, 2570 flow [2022-12-13 18:58:21,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 196.66666666666666) internal successors, (1770), 9 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:58:21,880 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:58:21,880 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:58:21,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-13 18:58:22,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:58:22,082 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:58:22,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:58:22,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1471972315, now seen corresponding path program 1 times [2022-12-13 18:58:22,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:58:22,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600725338] [2022-12-13 18:58:22,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:58:22,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:58:22,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:58:22,087 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:58:22,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-13 18:58:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:58:22,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:58:22,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:58:22,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:58:22,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-12-13 18:58:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:58:22,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:58:22,538 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-12-13 18:58:22,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 28 [2022-12-13 18:58:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:58:22,618 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:58:22,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600725338] [2022-12-13 18:58:22,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600725338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:58:22,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:58:22,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 18:58:22,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260943265] [2022-12-13 18:58:22,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:58:22,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:58:22,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:58:22,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:58:22,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:58:23,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 505 [2022-12-13 18:58:23,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 228 transitions, 2570 flow. Second operand has 8 states, 8 states have (on average 202.125) internal successors, (1617), 8 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:58:23,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:58:23,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 505 [2022-12-13 18:58:23,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:58:42,004 INFO L130 PetriNetUnfolder]: 55824/87618 cut-off events. [2022-12-13 18:58:42,004 INFO L131 PetriNetUnfolder]: For 143915/144707 co-relation queries the response was YES. [2022-12-13 18:58:43,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331419 conditions, 87618 events. 55824/87618 cut-off events. For 143915/144707 co-relation queries the response was YES. Maximal size of possible extension queue 1362. Compared 665860 event pairs, 9789 based on Foata normal form. 0/73293 useless extension candidates. Maximal degree in co-relation 331309. Up to 52651 conditions per place. [2022-12-13 18:58:43,370 INFO L137 encePairwiseOnDemand]: 497/505 looper letters, 249 selfloop transitions, 27 changer transitions 0/278 dead transitions. [2022-12-13 18:58:43,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 278 transitions, 3335 flow [2022-12-13 18:58:43,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:58:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:58:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1255 transitions. [2022-12-13 18:58:43,374 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4141914191419142 [2022-12-13 18:58:43,374 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1255 transitions. [2022-12-13 18:58:43,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1255 transitions. [2022-12-13 18:58:43,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:58:43,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1255 transitions. [2022-12-13 18:58:43,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 209.16666666666666) internal successors, (1255), 6 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:58:43,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 505.0) internal successors, (3535), 7 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:58:43,377 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 505.0) internal successors, (3535), 7 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:58:43,377 INFO L175 Difference]: Start difference. First operand has 237 places, 228 transitions, 2570 flow. Second operand 6 states and 1255 transitions. [2022-12-13 18:58:43,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 278 transitions, 3335 flow [2022-12-13 18:59:00,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 278 transitions, 3202 flow, removed 24 selfloop flow, removed 5 redundant places. [2022-12-13 18:59:00,866 INFO L231 Difference]: Finished difference. Result has 240 places, 234 transitions, 2567 flow [2022-12-13 18:59:00,866 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2567, PETRI_PLACES=240, PETRI_TRANSITIONS=234} [2022-12-13 18:59:00,866 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 181 predicate places. [2022-12-13 18:59:00,866 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 234 transitions, 2567 flow [2022-12-13 18:59:00,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 202.125) internal successors, (1617), 8 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:00,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:59:00,867 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:59:00,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-13 18:59:01,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:59:01,068 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 18:59:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:59:01,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1453668205, now seen corresponding path program 1 times [2022-12-13 18:59:01,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:59:01,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891540925] [2022-12-13 18:59:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:59:01,071 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:59:01,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:59:01,074 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:59:01,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abf92d2b-0cd3-437e-8043-760cbecb2ab8/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-13 18:59:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:59:01,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:59:01,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:59:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:59:01,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:59:01,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:59:01,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891540925] [2022-12-13 18:59:01,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891540925] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:59:01,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:59:01,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 18:59:01,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924644970] [2022-12-13 18:59:01,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:59:01,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:59:01,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:59:01,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:59:01,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:59:05,664 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 505 [2022-12-13 18:59:05,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 234 transitions, 2567 flow. Second operand has 6 states, 6 states have (on average 196.0) internal successors, (1176), 6 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:59:05,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:59:05,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 505 [2022-12-13 18:59:05,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:59:07,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 18:59:11,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0]