./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-3.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_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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_4e342507-424c-43fa-b784-fc72381df3c1/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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- 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 21:38:19,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:38:19,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:38:19,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:38:19,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:38:19,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:38:19,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:38:19,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:38:19,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:38:19,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:38:19,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:38:19,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:38:19,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:38:19,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:38:19,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:38:19,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:38:19,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:38:19,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:38:19,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:38:19,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:38:19,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:38:19,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:38:19,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:38:19,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:38:19,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:38:19,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:38:19,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:38:19,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:38:19,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:38:19,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:38:19,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:38:19,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:38:19,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:38:19,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:38:19,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:38:19,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:38:19,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:38:19,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:38:19,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:38:19,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:38:19,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:38:19,640 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 21:38:19,659 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:38:19,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:38:19,659 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:38:19,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:38:19,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:38:19,660 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:38:19,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:38:19,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:38:19,661 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:38:19,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:38:19,662 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:38:19,662 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 21:38:19,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:38:19,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:38:19,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:38:19,663 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 21:38:19,663 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 21:38:19,663 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 21:38:19,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:38:19,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 21:38:19,663 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:38:19,664 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:38:19,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:38:19,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:38:19,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:38:19,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:38:19,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:38:19,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:38:19,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:38:19,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:38:19,665 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:38:19,665 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:38:19,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:38:19,666 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:38:19,666 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_4e342507-424c-43fa-b784-fc72381df3c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2022-12-13 21:38:19,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:38:19,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:38:19,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:38:19,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:38:19,864 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:38:19,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-12-13 21:38:22,436 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:38:22,609 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:38:22,610 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-12-13 21:38:22,615 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/data/a0d62c027/40df7a2350c34c8cb629116e21d03384/FLAG396142399 [2022-12-13 21:38:22,994 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/data/a0d62c027/40df7a2350c34c8cb629116e21d03384 [2022-12-13 21:38:22,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:38:22,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:38:22,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:38:22,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:38:23,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:38:23,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:38:22" (1/1) ... [2022-12-13 21:38:23,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145114bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:23, skipping insertion in model container [2022-12-13 21:38:23,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:38:22" (1/1) ... [2022-12-13 21:38:23,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:38:23,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:38:23,124 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:23,126 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:23,127 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:23,128 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:23,129 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:23,130 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:23,130 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:23,131 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:23,132 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:23,133 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:23,139 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_4e342507-424c-43fa-b784-fc72381df3c1/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-12-13 21:38:23,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:38:23,153 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 21:38:23,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6c14ff81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:23, skipping insertion in model container [2022-12-13 21:38:23,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:38:23,154 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 21:38:23,155 INFO L158 Benchmark]: Toolchain (without parser) took 157.65ms. Allocated memory is still 125.8MB. Free memory was 93.9MB in the beginning and 83.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 21:38:23,156 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 125.8MB. Free memory is still 101.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 21:38:23,156 INFO L158 Benchmark]: CACSL2BoogieTranslator took 156.11ms. Allocated memory is still 125.8MB. Free memory was 93.9MB in the beginning and 83.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 21:38:23,157 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 125.8MB. Free memory is still 101.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 156.11ms. Allocated memory is still 125.8MB. Free memory was 93.9MB in the beginning and 83.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 135]: 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_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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_4e342507-424c-43fa-b784-fc72381df3c1/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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- 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 21:38:24,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:38:24,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:38:24,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:38:24,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:38:24,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:38:24,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:38:24,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:38:24,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:38:24,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:38:24,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:38:24,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:38:24,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:38:24,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:38:24,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:38:24,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:38:24,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:38:24,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:38:24,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:38:24,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:38:24,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:38:24,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:38:24,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:38:24,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:38:24,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:38:24,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:38:24,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:38:24,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:38:24,603 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:38:24,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:38:24,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:38:24,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:38:24,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:38:24,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:38:24,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:38:24,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:38:24,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:38:24,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:38:24,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:38:24,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:38:24,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:38:24,609 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 21:38:24,625 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:38:24,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:38:24,626 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:38:24,626 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:38:24,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:38:24,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:38:24,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:38:24,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:38:24,627 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:38:24,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:38:24,627 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:38:24,627 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 21:38:24,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:38:24,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:38:24,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:38:24,628 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 21:38:24,628 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 21:38:24,628 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 21:38:24,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:38:24,628 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 21:38:24,628 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 21:38:24,629 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 21:38:24,629 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:38:24,629 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:38:24,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:38:24,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:38:24,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:38:24,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:38:24,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:38:24,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:38:24,630 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 21:38:24,630 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 21:38:24,630 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:38:24,630 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:38:24,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:38:24,630 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 21:38:24,630 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:38:24,631 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_4e342507-424c-43fa-b784-fc72381df3c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2022-12-13 21:38:24,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:38:24,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:38:24,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:38:24,851 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:38:24,851 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:38:24,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-12-13 21:38:27,389 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:38:27,544 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:38:27,544 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-12-13 21:38:27,550 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/data/bc6a56225/c53240ee39394c71932787897b876e2f/FLAG0ef1085f1 [2022-12-13 21:38:27,944 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/data/bc6a56225/c53240ee39394c71932787897b876e2f [2022-12-13 21:38:27,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:38:27,948 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:38:27,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:38:27,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:38:27,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:38:27,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:38:27" (1/1) ... [2022-12-13 21:38:27,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f4836ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:27, skipping insertion in model container [2022-12-13 21:38:27,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:38:27" (1/1) ... [2022-12-13 21:38:27,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:38:27,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:38:28,109 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,111 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,112 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,113 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,115 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,116 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,116 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,117 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,118 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,119 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,125 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_4e342507-424c-43fa-b784-fc72381df3c1/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-12-13 21:38:28,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:38:28,144 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 21:38:28,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:38:28,150 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,151 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,152 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,153 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,153 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,154 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,155 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,156 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,157 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,158 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,161 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_4e342507-424c-43fa-b784-fc72381df3c1/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-12-13 21:38:28,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:38:28,167 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:38:28,180 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,181 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,181 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,182 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,183 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,184 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,185 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,186 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,187 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:38:28,188 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:38:28,193 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_4e342507-424c-43fa-b784-fc72381df3c1/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-12-13 21:38:28,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:38:28,214 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:38:28,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:28 WrapperNode [2022-12-13 21:38:28,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:38:28,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:38:28,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:38:28,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:38:28,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:28" (1/1) ... [2022-12-13 21:38:28,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:28" (1/1) ... [2022-12-13 21:38:28,251 INFO L138 Inliner]: procedures = 27, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 238 [2022-12-13 21:38:28,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:38:28,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:38:28,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:38:28,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:38:28,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:28" (1/1) ... [2022-12-13 21:38:28,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:28" (1/1) ... [2022-12-13 21:38:28,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:28" (1/1) ... [2022-12-13 21:38:28,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:28" (1/1) ... [2022-12-13 21:38:28,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:28" (1/1) ... [2022-12-13 21:38:28,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:28" (1/1) ... [2022-12-13 21:38:28,274 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:28" (1/1) ... [2022-12-13 21:38:28,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:28" (1/1) ... [2022-12-13 21:38:28,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:38:28,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:38:28,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:38:28,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:38:28,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:28" (1/1) ... [2022-12-13 21:38:28,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:38:28,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:38:28,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:38:28,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:38:28,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:38:28,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 21:38:28,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:38:28,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 21:38:28,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 21:38:28,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 21:38:28,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 21:38:28,337 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 21:38:28,337 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 21:38:28,337 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 21:38:28,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 21:38:28,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 21:38:28,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 21:38:28,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:38:28,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:38:28,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:38:28,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 21:38:28,339 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 21:38:28,465 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:38:28,466 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:38:28,957 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:38:29,064 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:38:29,064 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-13 21:38:29,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:38:29 BoogieIcfgContainer [2022-12-13 21:38:29,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:38:29,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:38:29,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:38:29,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:38:29,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:38:27" (1/3) ... [2022-12-13 21:38:29,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d36f89b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:38:29, skipping insertion in model container [2022-12-13 21:38:29,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:38:28" (2/3) ... [2022-12-13 21:38:29,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d36f89b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:38:29, skipping insertion in model container [2022-12-13 21:38:29,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:38:29" (3/3) ... [2022-12-13 21:38:29,072 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2022-12-13 21:38:29,085 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:38:29,085 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-13 21:38:29,085 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 21:38:29,143 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 21:38:29,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 234 transitions, 492 flow [2022-12-13 21:38:29,250 INFO L130 PetriNetUnfolder]: 18/231 cut-off events. [2022-12-13 21:38:29,250 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 21:38:29,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 231 events. 18/231 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 231 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 182. Up to 3 conditions per place. [2022-12-13 21:38:29,256 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 234 transitions, 492 flow [2022-12-13 21:38:29,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 226 transitions, 470 flow [2022-12-13 21:38:29,265 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:38:29,275 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 226 transitions, 470 flow [2022-12-13 21:38:29,278 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 226 transitions, 470 flow [2022-12-13 21:38:29,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 226 transitions, 470 flow [2022-12-13 21:38:29,322 INFO L130 PetriNetUnfolder]: 18/226 cut-off events. [2022-12-13 21:38:29,322 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 21:38:29,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 226 events. 18/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 230 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 182. Up to 3 conditions per place. [2022-12-13 21:38:29,325 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2022-12-13 21:38:57,324 INFO L134 LiptonReduction]: Checked pairs total: 4432 [2022-12-13 21:38:57,325 INFO L136 LiptonReduction]: Total number of compositions: 245 [2022-12-13 21:38:57,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:38:57,339 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;@3448709d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:38:57,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-12-13 21:38:57,341 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 21:38:57,341 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:38:57,341 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:38:57,342 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 21:38:57,342 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 21:38:57,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:38:57,346 INFO L85 PathProgramCache]: Analyzing trace with hash 34390, now seen corresponding path program 1 times [2022-12-13 21:38:57,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:38:57,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257746939] [2022-12-13 21:38:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:38:57,355 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 21:38:57,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:38:57,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:38:57,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:38:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:38:57,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:38:57,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:38:57,540 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 21:38:57,540 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 21:38:57,566 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 21:38:57,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:38:57,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:38:57,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257746939] [2022-12-13 21:38:57,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257746939] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:38:57,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:38:57,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:38:57,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724077209] [2022-12-13 21:38:57,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:38:57,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:38:57,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:38:57,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:38:57,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:38:57,719 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2022-12-13 21:38:57,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:38:57,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:38:57,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2022-12-13 21:38:57,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:38:58,785 INFO L130 PetriNetUnfolder]: 5969/7530 cut-off events. [2022-12-13 21:38:58,785 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-12-13 21:38:58,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15189 conditions, 7530 events. 5969/7530 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 33537 event pairs, 3012 based on Foata normal form. 0/1760 useless extension candidates. Maximal degree in co-relation 13696. Up to 7480 conditions per place. [2022-12-13 21:38:58,839 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2022-12-13 21:38:58,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 216 flow [2022-12-13 21:38:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:38:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:38:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2022-12-13 21:38:58,853 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4286708420320111 [2022-12-13 21:38:58,854 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2022-12-13 21:38:58,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2022-12-13 21:38:58,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:38:58,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2022-12-13 21:38:58,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:38:58,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:38:58,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:38:58,871 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 3 states and 616 transitions. [2022-12-13 21:38:58,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 216 flow [2022-12-13 21:38:58,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 21:38:58,879 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 110 flow [2022-12-13 21:38:58,881 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, 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 21:38:58,884 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2022-12-13 21:38:58,884 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 110 flow [2022-12-13 21:38:58,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:38:58,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:38:58,885 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 21:38:58,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:38:59,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:38:59,087 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 21:38:59,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:38:59,089 INFO L85 PathProgramCache]: Analyzing trace with hash 34391, now seen corresponding path program 1 times [2022-12-13 21:38:59,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:38:59,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141740639] [2022-12-13 21:38:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:38:59,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:38:59,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:38:59,095 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:38:59,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:38:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:38:59,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 21:38:59,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:38:59,388 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 21:38:59,389 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 21:38:59,417 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 21:38:59,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:38:59,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:38:59,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141740639] [2022-12-13 21:38:59,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141740639] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:38:59,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:38:59,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:38:59,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623884915] [2022-12-13 21:38:59,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:38:59,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:38:59,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:38:59,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:38:59,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:38:59,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2022-12-13 21:38:59,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:38:59,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:38:59,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2022-12-13 21:38:59,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:39:01,413 INFO L130 PetriNetUnfolder]: 11937/15057 cut-off events. [2022-12-13 21:39:01,413 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 21:39:01,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30146 conditions, 15057 events. 11937/15057 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 1256. Compared 72983 event pairs, 6024 based on Foata normal form. 0/3659 useless extension candidates. Maximal degree in co-relation 30140. Up to 7481 conditions per place. [2022-12-13 21:39:01,466 INFO L137 encePairwiseOnDemand]: 473/479 looper letters, 89 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2022-12-13 21:39:01,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 96 transitions, 392 flow [2022-12-13 21:39:01,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:39:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:39:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2022-12-13 21:39:01,468 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45859429366736254 [2022-12-13 21:39:01,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2022-12-13 21:39:01,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2022-12-13 21:39:01,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:39:01,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2022-12-13 21:39:01,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:01,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:01,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:01,472 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 110 flow. Second operand 3 states and 659 transitions. [2022-12-13 21:39:01,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 96 transitions, 392 flow [2022-12-13 21:39:01,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 96 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:39:01,474 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 141 flow [2022-12-13 21:39:01,474 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, 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 21:39:01,474 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2022-12-13 21:39:01,474 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 141 flow [2022-12-13 21:39:01,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:01,475 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:39:01,475 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 21:39:01,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:01,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:01,676 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 21:39:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:39:01,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1072282, now seen corresponding path program 1 times [2022-12-13 21:39:01,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:39:01,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406234064] [2022-12-13 21:39:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:39:01,677 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 21:39:01,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:39:01,678 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:01,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:39:01,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 21:39:01,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:39:01,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:39:01,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:39:01,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:39:01,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:39:01,839 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-13 21:39:01,839 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 21:39:01,862 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 21:39:01,863 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 21:39:01,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:39:01,912 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 21:39:01,941 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 21:39:01,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:39:01,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:39:01,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406234064] [2022-12-13 21:39:01,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406234064] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:39:01,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:39:01,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:39:01,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107269342] [2022-12-13 21:39:01,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:39:01,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:39:01,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:39:01,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:39:01,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:39:02,180 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 479 [2022-12-13 21:39:02,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:02,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:39:02,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 479 [2022-12-13 21:39:02,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:39:03,567 INFO L130 PetriNetUnfolder]: 9325/11883 cut-off events. [2022-12-13 21:39:03,567 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 21:39:03,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23812 conditions, 11883 events. 9325/11883 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 57415 event pairs, 4690 based on Foata normal form. 0/3013 useless extension candidates. Maximal degree in co-relation 23803. Up to 11783 conditions per place. [2022-12-13 21:39:03,609 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 48 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2022-12-13 21:39:03,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 235 flow [2022-12-13 21:39:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:39:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:39:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2022-12-13 21:39:03,612 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4342379958246347 [2022-12-13 21:39:03,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2022-12-13 21:39:03,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2022-12-13 21:39:03,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:39:03,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2022-12-13 21:39:03,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:03,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:03,616 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:03,616 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 141 flow. Second operand 3 states and 624 transitions. [2022-12-13 21:39:03,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 235 flow [2022-12-13 21:39:03,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:39:03,618 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 131 flow [2022-12-13 21:39:03,618 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, 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 21:39:03,619 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2022-12-13 21:39:03,619 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 131 flow [2022-12-13 21:39:03,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:03,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:39:03,620 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 21:39:03,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:03,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:03,821 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 21:39:03,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:39:03,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1072284, now seen corresponding path program 1 times [2022-12-13 21:39:03,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:39:03,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359370782] [2022-12-13 21:39:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:39:03,822 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 21:39:03,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:39:03,823 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:03,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:39:03,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 21:39:03,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:39:03,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:39:03,966 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-13 21:39:03,967 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 21:39:04,269 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-12-13 21:39:04,270 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 21:39:04,336 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 21:39:04,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:39:04,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:39:04,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359370782] [2022-12-13 21:39:04,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359370782] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:39:04,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:39:04,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:39:04,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573996082] [2022-12-13 21:39:04,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:39:04,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:39:04,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:39:04,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:39:04,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:39:04,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 479 [2022-12-13 21:39:04,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:04,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:39:04,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 479 [2022-12-13 21:39:04,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:39:05,601 INFO L130 PetriNetUnfolder]: 6713/8709 cut-off events. [2022-12-13 21:39:05,601 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 21:39:05,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17461 conditions, 8709 events. 6713/8709 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 42386 event pairs, 3356 based on Foata normal form. 0/2501 useless extension candidates. Maximal degree in co-relation 17452. Up to 8609 conditions per place. [2022-12-13 21:39:05,623 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 46 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2022-12-13 21:39:05,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 221 flow [2022-12-13 21:39:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:39:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:39:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2022-12-13 21:39:05,625 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43075852470424497 [2022-12-13 21:39:05,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2022-12-13 21:39:05,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2022-12-13 21:39:05,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:39:05,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2022-12-13 21:39:05,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:05,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:05,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:05,628 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 131 flow. Second operand 3 states and 619 transitions. [2022-12-13 21:39:05,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 221 flow [2022-12-13 21:39:05,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:39:05,629 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 128 flow [2022-12-13 21:39:05,629 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, 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 21:39:05,630 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2022-12-13 21:39:05,630 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 128 flow [2022-12-13 21:39:05,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:05,630 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:39:05,630 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 21:39:05,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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)] Forceful destruction successful, exit code 0 [2022-12-13 21:39:05,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:05,832 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 21:39:05,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:39:05,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1071093, now seen corresponding path program 1 times [2022-12-13 21:39:05,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:39:05,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987661555] [2022-12-13 21:39:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:39:05,835 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 21:39:05,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:39:05,838 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:05,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:39:05,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 21:39:05,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:39:06,046 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 21:39:06,046 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 21:39:06,103 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 21:39:06,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:39:06,291 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 21:39:06,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:39:06,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987661555] [2022-12-13 21:39:06,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987661555] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:39:06,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:39:06,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 21:39:06,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886435104] [2022-12-13 21:39:06,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:39:06,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 21:39:06,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:39:06,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 21:39:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:39:07,047 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 479 [2022-12-13 21:39:07,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 128 flow. Second operand has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:07,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:39:07,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 479 [2022-12-13 21:39:07,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:39:09,705 INFO L130 PetriNetUnfolder]: 10073/13070 cut-off events. [2022-12-13 21:39:09,705 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-12-13 21:39:09,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26207 conditions, 13070 events. 10073/13070 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 66496 event pairs, 5034 based on Foata normal form. 0/3869 useless extension candidates. Maximal degree in co-relation 26197. Up to 4306 conditions per place. [2022-12-13 21:39:09,742 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 119 selfloop transitions, 15 changer transitions 0/137 dead transitions. [2022-12-13 21:39:09,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 137 transitions, 600 flow [2022-12-13 21:39:09,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:39:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:39:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1208 transitions. [2022-12-13 21:39:09,745 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42032011134307584 [2022-12-13 21:39:09,745 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1208 transitions. [2022-12-13 21:39:09,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1208 transitions. [2022-12-13 21:39:09,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:39:09,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1208 transitions. [2022-12-13 21:39:09,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.33333333333334) internal successors, (1208), 6 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:09,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:09,750 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:09,750 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 128 flow. Second operand 6 states and 1208 transitions. [2022-12-13 21:39:09,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 137 transitions, 600 flow [2022-12-13 21:39:09,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 137 transitions, 599 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:39:09,752 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 240 flow [2022-12-13 21:39:09,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, 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 21:39:09,752 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2022-12-13 21:39:09,753 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 240 flow [2022-12-13 21:39:09,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:09,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:39:09,753 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:39:09,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:09,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:09,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:39:09,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:39:09,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1030489763, now seen corresponding path program 1 times [2022-12-13 21:39:09,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:39:09,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351905317] [2022-12-13 21:39:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:39:09,957 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 21:39:09,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:39:09,960 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:09,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:39:10,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 21:39:10,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:39:10,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:39:10,112 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-13 21:39:10,113 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 21:39:10,340 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-13 21:39:10,341 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 21:39:10,424 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 21:39:10,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:39:10,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:39:10,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351905317] [2022-12-13 21:39:10,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351905317] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:39:10,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:39:10,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:39:10,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427731189] [2022-12-13 21:39:10,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:39:10,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:39:10,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:39:10,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:39:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:39:10,618 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 479 [2022-12-13 21:39:10,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:10,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:39:10,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 479 [2022-12-13 21:39:10,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:39:11,928 INFO L130 PetriNetUnfolder]: 9668/12524 cut-off events. [2022-12-13 21:39:11,928 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 21:39:11,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25160 conditions, 12524 events. 9668/12524 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 63678 event pairs, 4818 based on Foata normal form. 0/3664 useless extension candidates. Maximal degree in co-relation 25145. Up to 12374 conditions per place. [2022-12-13 21:39:11,961 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 55 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2022-12-13 21:39:11,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 348 flow [2022-12-13 21:39:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:39:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:39:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 617 transitions. [2022-12-13 21:39:11,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42936673625608907 [2022-12-13 21:39:11,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 617 transitions. [2022-12-13 21:39:11,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 617 transitions. [2022-12-13 21:39:11,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:39:11,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 617 transitions. [2022-12-13 21:39:11,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:11,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:11,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:11,965 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 240 flow. Second operand 3 states and 617 transitions. [2022-12-13 21:39:11,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 348 flow [2022-12-13 21:39:11,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 329 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 21:39:11,967 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 219 flow [2022-12-13 21:39:11,967 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, 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 21:39:11,967 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2022-12-13 21:39:11,968 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 219 flow [2022-12-13 21:39:11,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:11,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:39:11,968 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:39:11,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:12,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:12,170 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:39:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:39:12,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1030489765, now seen corresponding path program 1 times [2022-12-13 21:39:12,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:39:12,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279200396] [2022-12-13 21:39:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:39:12,172 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 21:39:12,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:39:12,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:12,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:39:12,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 21:39:12,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:39:12,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:39:12,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:39:12,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:39:12,380 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 21:39:12,381 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 21:39:12,397 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 21:39:12,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:39:12,437 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 21:39:12,476 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 21:39:12,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:39:12,477 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:39:12,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279200396] [2022-12-13 21:39:12,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279200396] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:39:12,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:39:12,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:39:12,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973039565] [2022-12-13 21:39:12,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:39:12,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:39:12,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:39:12,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:39:12,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:39:12,664 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 479 [2022-12-13 21:39:12,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:12,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:39:12,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 479 [2022-12-13 21:39:12,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:39:13,983 INFO L130 PetriNetUnfolder]: 9263/11978 cut-off events. [2022-12-13 21:39:13,983 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-12-13 21:39:13,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24059 conditions, 11978 events. 9263/11978 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 60574 event pairs, 4602 based on Foata normal form. 0/3565 useless extension candidates. Maximal degree in co-relation 24043. Up to 11828 conditions per place. [2022-12-13 21:39:14,014 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 53 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2022-12-13 21:39:14,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 323 flow [2022-12-13 21:39:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:39:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:39:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 618 transitions. [2022-12-13 21:39:14,016 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.430062630480167 [2022-12-13 21:39:14,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 618 transitions. [2022-12-13 21:39:14,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 618 transitions. [2022-12-13 21:39:14,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:39:14,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 618 transitions. [2022-12-13 21:39:14,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:14,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:14,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:14,019 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 219 flow. Second operand 3 states and 618 transitions. [2022-12-13 21:39:14,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 323 flow [2022-12-13 21:39:14,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:39:14,021 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 216 flow [2022-12-13 21:39:14,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, 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 21:39:14,021 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2022-12-13 21:39:14,021 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 216 flow [2022-12-13 21:39:14,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:14,022 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:39:14,022 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 21:39:14,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:14,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:14,223 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:39:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:39:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1880404962, now seen corresponding path program 1 times [2022-12-13 21:39:14,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:39:14,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903109172] [2022-12-13 21:39:14,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:39:14,226 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 21:39:14,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:39:14,229 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:14,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:39:14,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 21:39:14,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:39:14,365 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 21:39:14,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:39:14,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:39:14,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903109172] [2022-12-13 21:39:14,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903109172] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:39:14,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:39:14,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:39:14,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130464389] [2022-12-13 21:39:14,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:39:14,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:39:14,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:39:14,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:39:14,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:39:14,465 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 479 [2022-12-13 21:39:14,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:14,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:39:14,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 479 [2022-12-13 21:39:14,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:39:15,883 INFO L130 PetriNetUnfolder]: 9289/12067 cut-off events. [2022-12-13 21:39:15,883 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-12-13 21:39:15,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24262 conditions, 12067 events. 9289/12067 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 60998 event pairs, 4611 based on Foata normal form. 84/3870 useless extension candidates. Maximal degree in co-relation 24245. Up to 11827 conditions per place. [2022-12-13 21:39:15,916 INFO L137 encePairwiseOnDemand]: 465/479 looper letters, 71 selfloop transitions, 3 changer transitions 1/78 dead transitions. [2022-12-13 21:39:15,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 78 transitions, 451 flow [2022-12-13 21:39:15,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:39:15,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:39:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 824 transitions. [2022-12-13 21:39:15,918 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.430062630480167 [2022-12-13 21:39:15,918 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 824 transitions. [2022-12-13 21:39:15,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 824 transitions. [2022-12-13 21:39:15,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:39:15,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 824 transitions. [2022-12-13 21:39:15,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:15,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:15,922 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:15,922 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 216 flow. Second operand 4 states and 824 transitions. [2022-12-13 21:39:15,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 78 transitions, 451 flow [2022-12-13 21:39:15,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 450 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:39:15,923 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 244 flow [2022-12-13 21:39:15,923 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, 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 21:39:15,924 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2022-12-13 21:39:15,924 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 244 flow [2022-12-13 21:39:15,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:15,924 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:39:15,924 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 21:39:15,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:16,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:16,125 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 21:39:16,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:39:16,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1849097687, now seen corresponding path program 2 times [2022-12-13 21:39:16,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:39:16,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789678921] [2022-12-13 21:39:16,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:39:16,127 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 21:39:16,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:39:16,128 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:16,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:16,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:39:16,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:39:16,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 21:39:16,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:39:16,289 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 21:39:16,289 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 21:39:16,398 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 21:39:16,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:39:16,894 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 21:39:16,894 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:39:16,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789678921] [2022-12-13 21:39:16,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789678921] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:39:16,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:39:16,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 21:39:16,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207181467] [2022-12-13 21:39:16,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:39:16,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 21:39:16,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:39:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 21:39:16,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 21:39:20,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 479 [2022-12-13 21:39:20,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 244 flow. Second operand has 12 states, 12 states have (on average 181.0) internal successors, (2172), 12 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:20,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:39:20,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 479 [2022-12-13 21:39:20,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:39:24,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:39:25,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:39:28,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:39:35,641 INFO L130 PetriNetUnfolder]: 24862/32254 cut-off events. [2022-12-13 21:39:35,641 INFO L131 PetriNetUnfolder]: For 2793/2793 co-relation queries the response was YES. [2022-12-13 21:39:35,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83166 conditions, 32254 events. 24862/32254 cut-off events. For 2793/2793 co-relation queries the response was YES. Maximal size of possible extension queue 1565. Compared 178398 event pairs, 12320 based on Foata normal form. 14/10058 useless extension candidates. Maximal degree in co-relation 83147. Up to 18393 conditions per place. [2022-12-13 21:39:35,773 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 277 selfloop transitions, 30 changer transitions 0/310 dead transitions. [2022-12-13 21:39:35,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 310 transitions, 1648 flow [2022-12-13 21:39:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 21:39:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 21:39:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2657 transitions. [2022-12-13 21:39:35,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42669022000963547 [2022-12-13 21:39:35,781 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2657 transitions. [2022-12-13 21:39:35,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2657 transitions. [2022-12-13 21:39:35,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:39:35,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2657 transitions. [2022-12-13 21:39:35,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 204.3846153846154) internal successors, (2657), 13 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:35,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 479.0) internal successors, (6706), 14 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:35,798 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 479.0) internal successors, (6706), 14 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:35,798 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 244 flow. Second operand 13 states and 2657 transitions. [2022-12-13 21:39:35,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 310 transitions, 1648 flow [2022-12-13 21:39:35,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 310 transitions, 1642 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 21:39:35,802 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 458 flow [2022-12-13 21:39:35,803 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, 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=13, PETRI_FLOW=458, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2022-12-13 21:39:35,803 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 21 predicate places. [2022-12-13 21:39:35,803 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 458 flow [2022-12-13 21:39:35,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 181.0) internal successors, (2172), 12 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:35,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:39:35,804 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:39:35,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:36,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:36,005 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:39:36,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:39:36,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1518765625, now seen corresponding path program 1 times [2022-12-13 21:39:36,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:39:36,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124972345] [2022-12-13 21:39:36,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:39:36,009 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 21:39:36,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:39:36,013 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:36,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:39:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:39:36,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 21:39:36,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:39:36,277 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 21:39:36,277 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 21:39:36,379 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 21:39:36,379 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 21:39:36,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:39:36,467 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 21:39:36,474 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 21:39:36,474 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 21:39:36,511 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 21:39:36,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:39:42,067 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 21:39:42,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:39:42,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124972345] [2022-12-13 21:39:42,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124972345] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:39:42,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:39:42,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 21:39:42,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806825114] [2022-12-13 21:39:42,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:39:42,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 21:39:42,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:39:42,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 21:39:42,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:39:51,559 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 479 [2022-12-13 21:39:51,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 458 flow. Second operand has 8 states, 8 states have (on average 170.5) internal successors, (1364), 8 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:39:51,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:39:51,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 479 [2022-12-13 21:39:51,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:39:56,974 WARN L233 SmtUtils]: Spent 5.27s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:40:03,064 WARN L233 SmtUtils]: Spent 5.81s 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 21:40:19,743 INFO L130 PetriNetUnfolder]: 55448/72348 cut-off events. [2022-12-13 21:40:19,743 INFO L131 PetriNetUnfolder]: For 7833/7833 co-relation queries the response was YES. [2022-12-13 21:40:19,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185204 conditions, 72348 events. 55448/72348 cut-off events. For 7833/7833 co-relation queries the response was YES. Maximal size of possible extension queue 3329. Compared 442926 event pairs, 27704 based on Foata normal form. 0/24529 useless extension candidates. Maximal degree in co-relation 185176. Up to 39873 conditions per place. [2022-12-13 21:40:20,199 INFO L137 encePairwiseOnDemand]: 469/479 looper letters, 175 selfloop transitions, 31 changer transitions 1/210 dead transitions. [2022-12-13 21:40:20,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 210 transitions, 1443 flow [2022-12-13 21:40:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 21:40:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 21:40:20,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2708 transitions. [2022-12-13 21:40:20,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3768963117606124 [2022-12-13 21:40:20,207 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2708 transitions. [2022-12-13 21:40:20,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2708 transitions. [2022-12-13 21:40:20,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:40:20,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2708 transitions. [2022-12-13 21:40:20,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 180.53333333333333) internal successors, (2708), 15 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:20,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 479.0) internal successors, (7664), 16 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:20,223 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 479.0) internal successors, (7664), 16 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:20,223 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 458 flow. Second operand 15 states and 2708 transitions. [2022-12-13 21:40:20,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 210 transitions, 1443 flow [2022-12-13 21:40:20,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 210 transitions, 1332 flow, removed 28 selfloop flow, removed 4 redundant places. [2022-12-13 21:40:20,230 INFO L231 Difference]: Finished difference. Result has 96 places, 92 transitions, 643 flow [2022-12-13 21:40:20,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=643, PETRI_PLACES=96, PETRI_TRANSITIONS=92} [2022-12-13 21:40:20,231 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 37 predicate places. [2022-12-13 21:40:20,231 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 92 transitions, 643 flow [2022-12-13 21:40:20,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 170.5) internal successors, (1364), 8 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:20,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:40:20,232 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:40:20,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 21:40:20,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:20,434 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:40:20,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1518765696, now seen corresponding path program 1 times [2022-12-13 21:40:20,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:40:20,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652295127] [2022-12-13 21:40:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:20,437 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 21:40:20,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:40:20,440 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:20,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:20,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 21:40:20,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:40:20,649 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 21:40:20,649 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 21:40:20,679 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 21:40:20,679 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 21:40:20,699 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 21:40:20,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:40:20,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:40:20,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652295127] [2022-12-13 21:40:20,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652295127] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:40:20,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:40:20,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:40:20,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858054370] [2022-12-13 21:40:20,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:40:20,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:40:20,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:40:20,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:40:20,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:40:20,917 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 479 [2022-12-13 21:40:20,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 92 transitions, 643 flow. Second operand has 4 states, 4 states have (on average 187.5) internal successors, (750), 4 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:20,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:40:20,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 479 [2022-12-13 21:40:20,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:40:26,707 INFO L130 PetriNetUnfolder]: 31408/41812 cut-off events. [2022-12-13 21:40:26,707 INFO L131 PetriNetUnfolder]: For 31139/31139 co-relation queries the response was YES. [2022-12-13 21:40:26,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117612 conditions, 41812 events. 31408/41812 cut-off events. For 31139/31139 co-relation queries the response was YES. Maximal size of possible extension queue 2098. Compared 255926 event pairs, 15864 based on Foata normal form. 0/19468 useless extension candidates. Maximal degree in co-relation 117577. Up to 41295 conditions per place. [2022-12-13 21:40:26,941 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 74 selfloop transitions, 12 changer transitions 0/89 dead transitions. [2022-12-13 21:40:26,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 89 transitions, 803 flow [2022-12-13 21:40:26,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:40:26,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:40:26,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 784 transitions. [2022-12-13 21:40:26,944 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4091858037578288 [2022-12-13 21:40:26,944 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 784 transitions. [2022-12-13 21:40:26,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 784 transitions. [2022-12-13 21:40:26,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:40:26,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 784 transitions. [2022-12-13 21:40:26,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:26,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:26,949 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:26,949 INFO L175 Difference]: Start difference. First operand has 96 places, 92 transitions, 643 flow. Second operand 4 states and 784 transitions. [2022-12-13 21:40:26,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 89 transitions, 803 flow [2022-12-13 21:40:27,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 89 transitions, 782 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 21:40:27,004 INFO L231 Difference]: Finished difference. Result has 95 places, 89 transitions, 634 flow [2022-12-13 21:40:27,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=634, PETRI_PLACES=95, PETRI_TRANSITIONS=89} [2022-12-13 21:40:27,004 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 36 predicate places. [2022-12-13 21:40:27,004 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 89 transitions, 634 flow [2022-12-13 21:40:27,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 187.5) internal successors, (750), 4 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:27,005 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:40:27,005 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:40:27,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:27,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:27,206 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 21:40:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1836756452, now seen corresponding path program 1 times [2022-12-13 21:40:27,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:40:27,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344700971] [2022-12-13 21:40:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:27,208 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 21:40:27,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:40:27,209 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:27,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:27,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 21:40:27,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:40:27,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:40:27,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:40:27,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:40:27,452 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 21:40:27,452 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 21:40:27,464 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 18 treesize of output 16 [2022-12-13 21:40:27,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:40:27,499 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 21:40:27,587 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 21:40:27,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:40:27,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:40:27,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344700971] [2022-12-13 21:40:27,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344700971] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:40:27,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:40:27,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:40:27,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150613868] [2022-12-13 21:40:27,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:40:27,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:40:27,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:40:27,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:40:27,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:40:27,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 479 [2022-12-13 21:40:27,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 89 transitions, 634 flow. Second operand has 4 states, 4 states have (on average 191.75) internal successors, (767), 4 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:27,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:40:27,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 479 [2022-12-13 21:40:27,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:40:33,388 INFO L130 PetriNetUnfolder]: 29664/39372 cut-off events. [2022-12-13 21:40:33,388 INFO L131 PetriNetUnfolder]: For 28996/28996 co-relation queries the response was YES. [2022-12-13 21:40:33,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110383 conditions, 39372 events. 29664/39372 cut-off events. For 28996/28996 co-relation queries the response was YES. Maximal size of possible extension queue 1928. Compared 236448 event pairs, 14936 based on Foata normal form. 0/18660 useless extension candidates. Maximal degree in co-relation 110347. Up to 38868 conditions per place. [2022-12-13 21:40:33,657 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 83 selfloop transitions, 1 changer transitions 0/87 dead transitions. [2022-12-13 21:40:33,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 87 transitions, 798 flow [2022-12-13 21:40:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:40:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:40:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2022-12-13 21:40:33,660 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42240779401530965 [2022-12-13 21:40:33,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2022-12-13 21:40:33,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2022-12-13 21:40:33,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:40:33,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2022-12-13 21:40:33,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:33,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:33,664 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:33,664 INFO L175 Difference]: Start difference. First operand has 95 places, 89 transitions, 634 flow. Second operand 3 states and 607 transitions. [2022-12-13 21:40:33,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 87 transitions, 798 flow [2022-12-13 21:40:33,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 87 transitions, 785 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:40:33,724 INFO L231 Difference]: Finished difference. Result has 93 places, 87 transitions, 619 flow [2022-12-13 21:40:33,724 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=91, 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=619, PETRI_PLACES=93, PETRI_TRANSITIONS=87} [2022-12-13 21:40:33,724 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 34 predicate places. [2022-12-13 21:40:33,724 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 87 transitions, 619 flow [2022-12-13 21:40:33,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.75) internal successors, (767), 4 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:33,725 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:40:33,725 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:40:33,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 21:40:33,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:33,926 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 21:40:33,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1836756453, now seen corresponding path program 1 times [2022-12-13 21:40:33,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:40:33,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238358704] [2022-12-13 21:40:33,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:33,930 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 21:40:33,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:40:33,933 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:33,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:34,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 21:40:34,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:40:34,105 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 21:40:34,105 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 21:40:34,139 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 21:40:34,140 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 21:40:34,157 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 21:40:34,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:40:34,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:40:34,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238358704] [2022-12-13 21:40:34,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238358704] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:40:34,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:40:34,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:40:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691911804] [2022-12-13 21:40:34,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:40:34,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:40:34,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:40:34,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:40:34,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:40:34,273 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 479 [2022-12-13 21:40:34,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 87 transitions, 619 flow. Second operand has 3 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:34,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:40:34,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 479 [2022-12-13 21:40:34,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:40:39,168 INFO L130 PetriNetUnfolder]: 27920/36932 cut-off events. [2022-12-13 21:40:39,168 INFO L131 PetriNetUnfolder]: For 26825/26825 co-relation queries the response was YES. [2022-12-13 21:40:39,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103151 conditions, 36932 events. 27920/36932 cut-off events. For 26825/26825 co-relation queries the response was YES. Maximal size of possible extension queue 1863. Compared 218497 event pairs, 14008 based on Foata normal form. 0/17852 useless extension candidates. Maximal degree in co-relation 103115. Up to 36428 conditions per place. [2022-12-13 21:40:39,383 INFO L137 encePairwiseOnDemand]: 476/479 looper letters, 81 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2022-12-13 21:40:39,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 85 transitions, 779 flow [2022-12-13 21:40:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:40:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:40:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2022-12-13 21:40:39,386 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41892832289492 [2022-12-13 21:40:39,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2022-12-13 21:40:39,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2022-12-13 21:40:39,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:40:39,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2022-12-13 21:40:39,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 21:40:39,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:39,388 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:39,388 INFO L175 Difference]: Start difference. First operand has 93 places, 87 transitions, 619 flow. Second operand 3 states and 602 transitions. [2022-12-13 21:40:39,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 85 transitions, 779 flow [2022-12-13 21:40:39,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 85 transitions, 778 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:40:39,431 INFO L231 Difference]: Finished difference. Result has 92 places, 85 transitions, 616 flow [2022-12-13 21:40:39,431 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=616, PETRI_PLACES=92, PETRI_TRANSITIONS=85} [2022-12-13 21:40:39,432 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 33 predicate places. [2022-12-13 21:40:39,432 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 85 transitions, 616 flow [2022-12-13 21:40:39,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:39,432 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:40:39,432 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:40:39,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:39,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:39,634 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:40:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:39,635 INFO L85 PathProgramCache]: Analyzing trace with hash -747864439, now seen corresponding path program 1 times [2022-12-13 21:40:39,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:40:39,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752649528] [2022-12-13 21:40:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:39,637 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 21:40:39,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:40:39,640 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:39,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:39,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:40:39,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:40:39,765 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 21:40:39,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:40:39,766 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:40:39,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752649528] [2022-12-13 21:40:39,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752649528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:40:39,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:40:39,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:40:39,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876021389] [2022-12-13 21:40:39,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:40:39,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:40:39,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:40:39,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:40:39,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:40:39,776 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 479 [2022-12-13 21:40:39,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 85 transitions, 616 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:39,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:40:39,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 479 [2022-12-13 21:40:39,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:40:43,876 INFO L130 PetriNetUnfolder]: 22720/30484 cut-off events. [2022-12-13 21:40:43,876 INFO L131 PetriNetUnfolder]: For 16233/16233 co-relation queries the response was YES. [2022-12-13 21:40:43,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82272 conditions, 30484 events. 22720/30484 cut-off events. For 16233/16233 co-relation queries the response was YES. Maximal size of possible extension queue 1600. Compared 180476 event pairs, 3136 based on Foata normal form. 704/15588 useless extension candidates. Maximal degree in co-relation 82235. Up to 29057 conditions per place. [2022-12-13 21:40:44,054 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 92 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2022-12-13 21:40:44,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 98 transitions, 854 flow [2022-12-13 21:40:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:40:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:40:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 635 transitions. [2022-12-13 21:40:44,057 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.441892832289492 [2022-12-13 21:40:44,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 635 transitions. [2022-12-13 21:40:44,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 635 transitions. [2022-12-13 21:40:44,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:40:44,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 635 transitions. [2022-12-13 21:40:44,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:44,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:44,060 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:44,061 INFO L175 Difference]: Start difference. First operand has 92 places, 85 transitions, 616 flow. Second operand 3 states and 635 transitions. [2022-12-13 21:40:44,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 98 transitions, 854 flow [2022-12-13 21:40:44,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 98 transitions, 853 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:40:44,105 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 644 flow [2022-12-13 21:40:44,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=644, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2022-12-13 21:40:44,105 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 35 predicate places. [2022-12-13 21:40:44,105 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 644 flow [2022-12-13 21:40:44,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:44,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:40:44,106 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 21:40:44,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:44,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:44,307 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:40:44,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:44,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1732471579, now seen corresponding path program 2 times [2022-12-13 21:40:44,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:40:44,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200983171] [2022-12-13 21:40:44,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:40:44,309 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 21:40:44,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:40:44,310 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:44,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:44,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 21:40:44,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:40:44,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 21:40:44,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:40:44,560 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 21:40:44,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 21:40:44,682 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 21:40:44,683 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 21:40:44,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:40:44,790 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 21:40:44,807 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 21:40:44,807 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 21:40:44,855 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 21:40:44,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:40:44,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:40:44,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200983171] [2022-12-13 21:40:44,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200983171] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:40:44,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:40:44,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:40:44,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558626181] [2022-12-13 21:40:44,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:40:44,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:40:44,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:40:44,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:40:44,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:40:45,175 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 479 [2022-12-13 21:40:45,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 644 flow. Second operand has 4 states, 4 states have (on average 182.5) internal successors, (730), 4 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:45,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:40:45,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 479 [2022-12-13 21:40:45,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:40:48,257 INFO L130 PetriNetUnfolder]: 15440/21316 cut-off events. [2022-12-13 21:40:48,257 INFO L131 PetriNetUnfolder]: For 23225/23225 co-relation queries the response was YES. [2022-12-13 21:40:48,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60802 conditions, 21316 events. 15440/21316 cut-off events. For 23225/23225 co-relation queries the response was YES. Maximal size of possible extension queue 1083. Compared 128844 event pairs, 6528 based on Foata normal form. 1168/11268 useless extension candidates. Maximal degree in co-relation 60763. Up to 20967 conditions per place. [2022-12-13 21:40:48,362 INFO L137 encePairwiseOnDemand]: 474/479 looper letters, 69 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2022-12-13 21:40:48,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 84 transitions, 774 flow [2022-12-13 21:40:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:40:48,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:40:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 757 transitions. [2022-12-13 21:40:48,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39509394572025053 [2022-12-13 21:40:48,365 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 757 transitions. [2022-12-13 21:40:48,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 757 transitions. [2022-12-13 21:40:48,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:40:48,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 757 transitions. [2022-12-13 21:40:48,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.25) internal successors, (757), 4 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:48,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:48,368 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:48,368 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 644 flow. Second operand 4 states and 757 transitions. [2022-12-13 21:40:48,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 84 transitions, 774 flow [2022-12-13 21:40:48,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 84 transitions, 756 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 21:40:48,376 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 618 flow [2022-12-13 21:40:48,376 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=88, 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=618, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2022-12-13 21:40:48,377 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 32 predicate places. [2022-12-13 21:40:48,377 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 618 flow [2022-12-13 21:40:48,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.5) internal successors, (730), 4 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:48,377 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:40:48,377 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:40:48,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:48,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:48,578 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:40:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:48,579 INFO L85 PathProgramCache]: Analyzing trace with hash -927374130, now seen corresponding path program 1 times [2022-12-13 21:40:48,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:40:48,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771180158] [2022-12-13 21:40:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:48,579 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 21:40:48,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:40:48,581 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:48,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:48,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 21:40:48,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:40:48,696 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 21:40:48,723 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 21:40:48,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:40:48,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:40:48,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771180158] [2022-12-13 21:40:48,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771180158] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:40:48,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:40:48,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:40:48,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28350780] [2022-12-13 21:40:48,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:40:48,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:40:48,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:40:48,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:40:48,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:40:48,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 479 [2022-12-13 21:40:48,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 618 flow. Second operand has 4 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:48,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:40:48,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 479 [2022-12-13 21:40:48,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:40:50,857 INFO L130 PetriNetUnfolder]: 10000/14228 cut-off events. [2022-12-13 21:40:50,858 INFO L131 PetriNetUnfolder]: For 3315/3315 co-relation queries the response was YES. [2022-12-13 21:40:50,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34780 conditions, 14228 events. 10000/14228 cut-off events. For 3315/3315 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 85090 event pairs, 4240 based on Foata normal form. 0/7788 useless extension candidates. Maximal degree in co-relation 34742. Up to 13876 conditions per place. [2022-12-13 21:40:50,943 INFO L137 encePairwiseOnDemand]: 475/479 looper letters, 62 selfloop transitions, 17 changer transitions 0/82 dead transitions. [2022-12-13 21:40:50,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 82 transitions, 770 flow [2022-12-13 21:40:50,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:40:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:40:50,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 774 transitions. [2022-12-13 21:40:50,946 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40396659707724425 [2022-12-13 21:40:50,946 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 774 transitions. [2022-12-13 21:40:50,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 774 transitions. [2022-12-13 21:40:50,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:40:50,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 774 transitions. [2022-12-13 21:40:50,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:50,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:50,949 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:50,949 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 618 flow. Second operand 4 states and 774 transitions. [2022-12-13 21:40:50,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 82 transitions, 770 flow [2022-12-13 21:40:50,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 82 transitions, 757 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:40:50,955 INFO L231 Difference]: Finished difference. Result has 90 places, 82 transitions, 633 flow [2022-12-13 21:40:50,955 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=633, PETRI_PLACES=90, PETRI_TRANSITIONS=82} [2022-12-13 21:40:50,955 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 31 predicate places. [2022-12-13 21:40:50,955 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 82 transitions, 633 flow [2022-12-13 21:40:50,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:50,955 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:40:50,956 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:40:50,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:51,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:51,157 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:40:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:51,158 INFO L85 PathProgramCache]: Analyzing trace with hash -927374129, now seen corresponding path program 1 times [2022-12-13 21:40:51,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:40:51,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758651718] [2022-12-13 21:40:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:51,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:40:51,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:40:51,162 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:51,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:51,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 21:40:51,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:40:51,294 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 21:40:51,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:40:51,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:40:51,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [758651718] [2022-12-13 21:40:51,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [758651718] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:40:51,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:40:51,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:40:51,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499980798] [2022-12-13 21:40:51,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:40:51,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:40:51,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:40:51,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:40:51,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:40:51,304 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 479 [2022-12-13 21:40:51,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 82 transitions, 633 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:51,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:40:51,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 479 [2022-12-13 21:40:51,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:40:53,210 INFO L130 PetriNetUnfolder]: 9376/13684 cut-off events. [2022-12-13 21:40:53,211 INFO L131 PetriNetUnfolder]: For 2977/2977 co-relation queries the response was YES. [2022-12-13 21:40:53,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32960 conditions, 13684 events. 9376/13684 cut-off events. For 2977/2977 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 80541 event pairs, 1632 based on Foata normal form. 320/8244 useless extension candidates. Maximal degree in co-relation 32922. Up to 10993 conditions per place. [2022-12-13 21:40:53,286 INFO L137 encePairwiseOnDemand]: 473/479 looper letters, 85 selfloop transitions, 3 changer transitions 2/93 dead transitions. [2022-12-13 21:40:53,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 93 transitions, 845 flow [2022-12-13 21:40:53,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:40:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:40:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2022-12-13 21:40:53,288 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4363256784968685 [2022-12-13 21:40:53,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2022-12-13 21:40:53,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2022-12-13 21:40:53,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:40:53,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2022-12-13 21:40:53,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:53,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:53,290 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:53,290 INFO L175 Difference]: Start difference. First operand has 90 places, 82 transitions, 633 flow. Second operand 3 states and 627 transitions. [2022-12-13 21:40:53,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 93 transitions, 845 flow [2022-12-13 21:40:53,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 93 transitions, 827 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:40:53,294 INFO L231 Difference]: Finished difference. Result has 91 places, 82 transitions, 624 flow [2022-12-13 21:40:53,295 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=624, PETRI_PLACES=91, PETRI_TRANSITIONS=82} [2022-12-13 21:40:53,295 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 32 predicate places. [2022-12-13 21:40:53,295 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 82 transitions, 624 flow [2022-12-13 21:40:53,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:53,295 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:40:53,295 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:40:53,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:53,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:53,497 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:40:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:53,498 INFO L85 PathProgramCache]: Analyzing trace with hash 286590733, now seen corresponding path program 1 times [2022-12-13 21:40:53,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:40:53,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640367924] [2022-12-13 21:40:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:53,499 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 21:40:53,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:40:53,502 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:53,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:53,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 21:40:53,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:40:53,768 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 21:40:53,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:40:53,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:40:53,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640367924] [2022-12-13 21:40:53,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640367924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:40:53,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:40:53,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:40:53,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099611225] [2022-12-13 21:40:53,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:40:53,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:40:53,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:40:53,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:40:53,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:40:53,865 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 479 [2022-12-13 21:40:53,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 82 transitions, 624 flow. Second operand has 4 states, 4 states have (on average 191.25) internal successors, (765), 4 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:53,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:40:53,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 479 [2022-12-13 21:40:53,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:40:55,768 INFO L130 PetriNetUnfolder]: 8320/12206 cut-off events. [2022-12-13 21:40:55,768 INFO L131 PetriNetUnfolder]: For 3368/3368 co-relation queries the response was YES. [2022-12-13 21:40:55,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34805 conditions, 12206 events. 8320/12206 cut-off events. For 3368/3368 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 70938 event pairs, 3162 based on Foata normal form. 30/7148 useless extension candidates. Maximal degree in co-relation 34766. Up to 11713 conditions per place. [2022-12-13 21:40:55,813 INFO L137 encePairwiseOnDemand]: 473/479 looper letters, 64 selfloop transitions, 14 changer transitions 16/97 dead transitions. [2022-12-13 21:40:55,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 97 transitions, 874 flow [2022-12-13 21:40:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:40:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:40:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 800 transitions. [2022-12-13 21:40:55,815 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4175365344467641 [2022-12-13 21:40:55,815 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 800 transitions. [2022-12-13 21:40:55,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 800 transitions. [2022-12-13 21:40:55,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:40:55,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 800 transitions. [2022-12-13 21:40:55,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:55,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:55,818 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:55,818 INFO L175 Difference]: Start difference. First operand has 91 places, 82 transitions, 624 flow. Second operand 4 states and 800 transitions. [2022-12-13 21:40:55,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 97 transitions, 874 flow [2022-12-13 21:40:55,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 97 transitions, 869 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 21:40:55,830 INFO L231 Difference]: Finished difference. Result has 95 places, 81 transitions, 666 flow [2022-12-13 21:40:55,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=666, PETRI_PLACES=95, PETRI_TRANSITIONS=81} [2022-12-13 21:40:55,830 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 36 predicate places. [2022-12-13 21:40:55,830 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 81 transitions, 666 flow [2022-12-13 21:40:55,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.25) internal successors, (765), 4 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:55,830 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:40:55,830 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1] [2022-12-13 21:40:55,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:56,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:56,032 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:40:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:56,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1531091408, now seen corresponding path program 1 times [2022-12-13 21:40:56,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:40:56,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10370661] [2022-12-13 21:40:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:56,033 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 21:40:56,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:40:56,034 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:56,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:40:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:56,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 21:40:56,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:40:56,182 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 21:40:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:56,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:40:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:58,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:40:58,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10370661] [2022-12-13 21:40:58,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10370661] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:40:58,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:40:58,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-12-13 21:40:58,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318146509] [2022-12-13 21:40:58,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:40:58,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 21:40:58,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:40:58,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 21:40:58,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-12-13 21:41:14,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 479 [2022-12-13 21:41:14,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 81 transitions, 666 flow. Second operand has 20 states, 20 states have (on average 181.05) internal successors, (3621), 20 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:41:14,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:41:14,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 479 [2022-12-13 21:41:14,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:41:19,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:41:21,208 WARN L539 Checker$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 21:41:23,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:41:25,189 WARN L539 Checker$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 21:41:27,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:41:29,194 WARN L539 Checker$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 21:41:30,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:41:34,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:41:36,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:41:40,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:41:54,831 INFO L130 PetriNetUnfolder]: 19910/29041 cut-off events. [2022-12-13 21:41:54,831 INFO L131 PetriNetUnfolder]: For 14756/14756 co-relation queries the response was YES. [2022-12-13 21:41:54,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84629 conditions, 29041 events. 19910/29041 cut-off events. For 14756/14756 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 181011 event pairs, 7548 based on Foata normal form. 43/18782 useless extension candidates. Maximal degree in co-relation 84588. Up to 11833 conditions per place. [2022-12-13 21:41:55,024 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 484 selfloop transitions, 54 changer transitions 0/541 dead transitions. [2022-12-13 21:41:55,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 541 transitions, 3859 flow [2022-12-13 21:41:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 21:41:55,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 21:41:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4581 transitions. [2022-12-13 21:41:55,032 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4158119270218753 [2022-12-13 21:41:55,032 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4581 transitions. [2022-12-13 21:41:55,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4581 transitions. [2022-12-13 21:41:55,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:41:55,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4581 transitions. [2022-12-13 21:41:55,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 199.17391304347825) internal successors, (4581), 23 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:41:55,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 479.0) internal successors, (11496), 24 states have internal predecessors, (11496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:41:55,052 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 479.0) internal successors, (11496), 24 states have internal predecessors, (11496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:41:55,053 INFO L175 Difference]: Start difference. First operand has 95 places, 81 transitions, 666 flow. Second operand 23 states and 4581 transitions. [2022-12-13 21:41:55,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 541 transitions, 3859 flow [2022-12-13 21:41:55,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 541 transitions, 3716 flow, removed 53 selfloop flow, removed 3 redundant places. [2022-12-13 21:41:55,180 INFO L231 Difference]: Finished difference. Result has 126 places, 102 transitions, 1021 flow [2022-12-13 21:41:55,180 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1021, PETRI_PLACES=126, PETRI_TRANSITIONS=102} [2022-12-13 21:41:55,180 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 67 predicate places. [2022-12-13 21:41:55,180 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 102 transitions, 1021 flow [2022-12-13 21:41:55,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.05) internal successors, (3621), 20 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:41:55,181 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:41:55,181 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:41:55,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:41:55,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:41:55,383 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:41:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:41:55,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1868358933, now seen corresponding path program 1 times [2022-12-13 21:41:55,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:41:55,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901512739] [2022-12-13 21:41:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:41:55,385 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 21:41:55,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:41:55,388 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:41:55,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:41:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:41:55,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 21:41:55,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:41:55,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 21:41:55,745 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 21:41:55,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:41:56,485 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 21:41:56,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:41:56,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901512739] [2022-12-13 21:41:56,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901512739] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:41:56,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:41:56,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 21:41:56,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307345212] [2022-12-13 21:41:56,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:41:56,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 21:41:56,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:41:56,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 21:41:56,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:42:02,790 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2022-12-13 21:42:02,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 102 transitions, 1021 flow. Second operand has 8 states, 8 states have (on average 176.25) internal successors, (1410), 8 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:42:02,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:42:02,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2022-12-13 21:42:02,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:42:09,596 INFO L130 PetriNetUnfolder]: 18506/27097 cut-off events. [2022-12-13 21:42:09,596 INFO L131 PetriNetUnfolder]: For 8160/8160 co-relation queries the response was YES. [2022-12-13 21:42:09,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76458 conditions, 27097 events. 18506/27097 cut-off events. For 8160/8160 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 168970 event pairs, 6954 based on Foata normal form. 0/16009 useless extension candidates. Maximal degree in co-relation 76405. Up to 23409 conditions per place. [2022-12-13 21:42:09,748 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 111 selfloop transitions, 36 changer transitions 0/150 dead transitions. [2022-12-13 21:42:09,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 150 transitions, 1493 flow [2022-12-13 21:42:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:42:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:42:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1469 transitions. [2022-12-13 21:42:09,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38335073068893527 [2022-12-13 21:42:09,752 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1469 transitions. [2022-12-13 21:42:09,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1469 transitions. [2022-12-13 21:42:09,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:42:09,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1469 transitions. [2022-12-13 21:42:09,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 183.625) internal successors, (1469), 8 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:42:09,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:42:09,757 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 479.0) internal successors, (4311), 9 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:42:09,757 INFO L175 Difference]: Start difference. First operand has 126 places, 102 transitions, 1021 flow. Second operand 8 states and 1469 transitions. [2022-12-13 21:42:09,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 150 transitions, 1493 flow [2022-12-13 21:42:09,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 150 transitions, 1398 flow, removed 20 selfloop flow, removed 7 redundant places. [2022-12-13 21:42:09,772 INFO L231 Difference]: Finished difference. Result has 128 places, 104 transitions, 1037 flow [2022-12-13 21:42:09,772 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1037, PETRI_PLACES=128, PETRI_TRANSITIONS=104} [2022-12-13 21:42:09,772 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 69 predicate places. [2022-12-13 21:42:09,772 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 104 transitions, 1037 flow [2022-12-13 21:42:09,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 176.25) internal successors, (1410), 8 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:42:09,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:42:09,773 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 1, 1] [2022-12-13 21:42:09,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:42:09,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:42:09,974 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:42:09,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:42:09,975 INFO L85 PathProgramCache]: Analyzing trace with hash 795651287, now seen corresponding path program 3 times [2022-12-13 21:42:09,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:42:09,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575900821] [2022-12-13 21:42:09,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:42:09,977 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 21:42:09,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:42:09,980 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:42:09,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:42:10,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 21:42:10,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:42:10,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 21:42:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:42:10,451 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 21:42:10,451 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 21:42:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:42:11,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:42:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:42:15,030 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:42:15,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575900821] [2022-12-13 21:42:15,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575900821] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:42:15,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:42:15,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2022-12-13 21:42:15,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916244906] [2022-12-13 21:42:15,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:42:15,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 21:42:15,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:42:15,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 21:42:15,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-12-13 21:42:44,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 479 [2022-12-13 21:42:44,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 104 transitions, 1037 flow. Second operand has 28 states, 28 states have (on average 181.0) internal successors, (5068), 28 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:42:44,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:42:44,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 479 [2022-12-13 21:42:44,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:43:00,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:43:02,570 WARN L539 Checker$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 21:43:04,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:43:06,576 WARN L539 Checker$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 21:43:08,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:43:10,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:43:12,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:43:14,588 WARN L539 Checker$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 21:43:15,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:43:17,978 WARN L539 Checker$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 21:43:19,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:43:21,983 WARN L539 Checker$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 21:43:43,301 INFO L130 PetriNetUnfolder]: 18518/27120 cut-off events. [2022-12-13 21:43:43,301 INFO L131 PetriNetUnfolder]: For 23152/23152 co-relation queries the response was YES. [2022-12-13 21:43:43,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84110 conditions, 27120 events. 18518/27120 cut-off events. For 23152/23152 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 168514 event pairs, 6954 based on Foata normal form. 13/19825 useless extension candidates. Maximal degree in co-relation 84055. Up to 11041 conditions per place. [2022-12-13 21:43:43,554 INFO L137 encePairwiseOnDemand]: 473/479 looper letters, 423 selfloop transitions, 79 changer transitions 0/505 dead transitions. [2022-12-13 21:43:43,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 505 transitions, 3998 flow [2022-12-13 21:43:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 21:43:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 21:43:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5452 transitions. [2022-12-13 21:43:43,561 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4065016403220996 [2022-12-13 21:43:43,561 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5452 transitions. [2022-12-13 21:43:43,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5452 transitions. [2022-12-13 21:43:43,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:43:43,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5452 transitions. [2022-12-13 21:43:43,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 194.71428571428572) internal successors, (5452), 28 states have internal predecessors, (5452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:43:43,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 479.0) internal successors, (13891), 29 states have internal predecessors, (13891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:43:43,576 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 479.0) internal successors, (13891), 29 states have internal predecessors, (13891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:43:43,576 INFO L175 Difference]: Start difference. First operand has 128 places, 104 transitions, 1037 flow. Second operand 28 states and 5452 transitions. [2022-12-13 21:43:43,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 505 transitions, 3998 flow [2022-12-13 21:43:43,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 505 transitions, 3812 flow, removed 21 selfloop flow, removed 5 redundant places. [2022-12-13 21:43:43,664 INFO L231 Difference]: Finished difference. Result has 164 places, 131 transitions, 1429 flow [2022-12-13 21:43:43,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1429, PETRI_PLACES=164, PETRI_TRANSITIONS=131} [2022-12-13 21:43:43,664 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 105 predicate places. [2022-12-13 21:43:43,664 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 131 transitions, 1429 flow [2022-12-13 21:43:43,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 181.0) internal successors, (5068), 28 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:43:43,665 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:43:43,665 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:43:43,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:43:43,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:43:43,866 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:43:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:43:43,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1409401117, now seen corresponding path program 1 times [2022-12-13 21:43:43,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:43:43,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555618402] [2022-12-13 21:43:43,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:43:43,869 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 21:43:43,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:43:43,872 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:43:43,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:43:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:43:44,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 21:43:44,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:43:44,079 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 21:43:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:43:44,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:43:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:43:46,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:43:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555618402] [2022-12-13 21:43:46,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555618402] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:43:46,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:43:46,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 21:43:46,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155860216] [2022-12-13 21:43:46,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:43:46,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 21:43:46,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:43:46,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 21:43:46,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-12-13 21:44:05,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 479 [2022-12-13 21:44:05,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 131 transitions, 1429 flow. Second operand has 14 states, 14 states have (on average 175.71428571428572) internal successors, (2460), 14 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:05,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:44:05,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 479 [2022-12-13 21:44:05,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:44:22,809 INFO L130 PetriNetUnfolder]: 15710/23232 cut-off events. [2022-12-13 21:44:22,809 INFO L131 PetriNetUnfolder]: For 21204/21204 co-relation queries the response was YES. [2022-12-13 21:44:22,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70049 conditions, 23232 events. 15710/23232 cut-off events. For 21204/21204 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 142960 event pairs, 5766 based on Foata normal form. 1296/17904 useless extension candidates. Maximal degree in co-relation 69980. Up to 13401 conditions per place. [2022-12-13 21:44:22,977 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 186 selfloop transitions, 72 changer transitions 0/261 dead transitions. [2022-12-13 21:44:22,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 261 transitions, 2511 flow [2022-12-13 21:44:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 21:44:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 21:44:22,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3104 transitions. [2022-12-13 21:44:22,982 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3811862949772811 [2022-12-13 21:44:22,982 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3104 transitions. [2022-12-13 21:44:22,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3104 transitions. [2022-12-13 21:44:22,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:44:22,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3104 transitions. [2022-12-13 21:44:22,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 182.58823529411765) internal successors, (3104), 17 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:22,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:22,990 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:22,990 INFO L175 Difference]: Start difference. First operand has 164 places, 131 transitions, 1429 flow. Second operand 17 states and 3104 transitions. [2022-12-13 21:44:22,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 261 transitions, 2511 flow [2022-12-13 21:44:23,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 261 transitions, 2350 flow, removed 32 selfloop flow, removed 13 redundant places. [2022-12-13 21:44:23,068 INFO L231 Difference]: Finished difference. Result has 169 places, 146 transitions, 1620 flow [2022-12-13 21:44:23,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1620, PETRI_PLACES=169, PETRI_TRANSITIONS=146} [2022-12-13 21:44:23,068 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 110 predicate places. [2022-12-13 21:44:23,068 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 146 transitions, 1620 flow [2022-12-13 21:44:23,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 175.71428571428572) internal successors, (2460), 14 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:23,068 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:44:23,068 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:44:23,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-13 21:44:23,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:44:23,270 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:44:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:44:23,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1883685917, now seen corresponding path program 2 times [2022-12-13 21:44:23,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:44:23,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205444876] [2022-12-13 21:44:23,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:44:23,273 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 21:44:23,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:44:23,276 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:44:23,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:44:23,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 21:44:23,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:44:23,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 21:44:23,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:44:23,428 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 21:44:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 21:44:23,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:44:23,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:44:23,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205444876] [2022-12-13 21:44:23,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205444876] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:44:23,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:44:23,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:44:23,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711546575] [2022-12-13 21:44:23,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:44:23,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:44:23,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:44:23,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:44:23,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:44:23,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 479 [2022-12-13 21:44:23,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 146 transitions, 1620 flow. Second operand has 4 states, 4 states have (on average 188.5) internal successors, (754), 4 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:23,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:44:23,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 479 [2022-12-13 21:44:23,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:44:26,882 INFO L130 PetriNetUnfolder]: 11966/18048 cut-off events. [2022-12-13 21:44:26,883 INFO L131 PetriNetUnfolder]: For 28050/28050 co-relation queries the response was YES. [2022-12-13 21:44:26,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51200 conditions, 18048 events. 11966/18048 cut-off events. For 28050/28050 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 110843 event pairs, 4182 based on Foata normal form. 1728/14064 useless extension candidates. Maximal degree in co-relation 51129. Up to 17405 conditions per place. [2022-12-13 21:44:27,013 INFO L137 encePairwiseOnDemand]: 475/479 looper letters, 78 selfloop transitions, 63 changer transitions 0/144 dead transitions. [2022-12-13 21:44:27,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 144 transitions, 1878 flow [2022-12-13 21:44:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:44:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:44:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 772 transitions. [2022-12-13 21:44:27,015 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40292275574112735 [2022-12-13 21:44:27,015 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 772 transitions. [2022-12-13 21:44:27,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 772 transitions. [2022-12-13 21:44:27,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:44:27,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 772 transitions. [2022-12-13 21:44:27,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:27,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:27,018 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:27,018 INFO L175 Difference]: Start difference. First operand has 169 places, 146 transitions, 1620 flow. Second operand 4 states and 772 transitions. [2022-12-13 21:44:27,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 144 transitions, 1878 flow [2022-12-13 21:44:27,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 144 transitions, 1684 flow, removed 33 selfloop flow, removed 13 redundant places. [2022-12-13 21:44:27,040 INFO L231 Difference]: Finished difference. Result has 157 places, 144 transitions, 1528 flow [2022-12-13 21:44:27,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1528, PETRI_PLACES=157, PETRI_TRANSITIONS=144} [2022-12-13 21:44:27,040 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 98 predicate places. [2022-12-13 21:44:27,040 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 144 transitions, 1528 flow [2022-12-13 21:44:27,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 188.5) internal successors, (754), 4 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:27,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:44:27,040 INFO L209 CegarLoopForPetriNet]: trace histogram [18, 1, 1, 1] [2022-12-13 21:44:27,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-13 21:44:27,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:44:27,242 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:44:27,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:44:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2097362768, now seen corresponding path program 2 times [2022-12-13 21:44:27,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:44:27,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087908334] [2022-12-13 21:44:27,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:44:27,245 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 21:44:27,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:44:27,247 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:44:27,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:44:27,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:44:27,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:44:27,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 21:44:27,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:44:27,472 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 21:44:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:44:28,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:44:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:44:34,942 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:44:34,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087908334] [2022-12-13 21:44:34,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087908334] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:44:34,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:44:34,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2022-12-13 21:44:34,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916023363] [2022-12-13 21:44:34,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:44:34,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 21:44:34,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:44:34,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 21:44:34,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 21:45:36,500 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 479 [2022-12-13 21:45:36,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 144 transitions, 1528 flow. Second operand has 40 states, 40 states have (on average 181.025) internal successors, (7241), 40 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:36,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:45:36,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 479 [2022-12-13 21:45:36,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:45:54,207 WARN L233 SmtUtils]: Spent 8.48s on a formula simplification that was a NOOP. DAG size: 209 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:45:57,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:45:59,096 WARN L539 Checker$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 21:46:01,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:46:03,101 WARN L539 Checker$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 21:46:05,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:46:07,107 WARN L539 Checker$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 21:46:09,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:46:11,181 WARN L539 Checker$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 21:46:13,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:46:15,186 WARN L539 Checker$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 21:46:17,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:46:19,192 WARN L539 Checker$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 21:46:21,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:46:23,197 WARN L539 Checker$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 21:46:25,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:46:27,203 WARN L539 Checker$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 21:46:29,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:46:31,209 WARN L539 Checker$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 21:46:44,044 WARN L233 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 187 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:47:45,301 INFO L130 PetriNetUnfolder]: 26006/39208 cut-off events. [2022-12-13 21:47:45,301 INFO L131 PetriNetUnfolder]: For 30470/30470 co-relation queries the response was YES. [2022-12-13 21:47:45,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110791 conditions, 39208 events. 26006/39208 cut-off events. For 30470/30470 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 248322 event pairs, 9102 based on Foata normal form. 80/26856 useless extension candidates. Maximal degree in co-relation 110725. Up to 15985 conditions per place. [2022-12-13 21:47:45,616 INFO L137 encePairwiseOnDemand]: 473/479 looper letters, 975 selfloop transitions, 92 changer transitions 0/1070 dead transitions. [2022-12-13 21:47:45,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 1070 transitions, 8218 flow [2022-12-13 21:47:45,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 21:47:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-13 21:47:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 8045 transitions. [2022-12-13 21:47:45,626 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4198851774530271 [2022-12-13 21:47:45,626 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 8045 transitions. [2022-12-13 21:47:45,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 8045 transitions. [2022-12-13 21:47:45,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:47:45,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 8045 transitions. [2022-12-13 21:47:45,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 201.125) internal successors, (8045), 40 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:45,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 479.0) internal successors, (19639), 41 states have internal predecessors, (19639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:45,646 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 479.0) internal successors, (19639), 41 states have internal predecessors, (19639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:45,646 INFO L175 Difference]: Start difference. First operand has 157 places, 144 transitions, 1528 flow. Second operand 40 states and 8045 transitions. [2022-12-13 21:47:45,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 1070 transitions, 8218 flow [2022-12-13 21:47:45,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 1070 transitions, 7937 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 21:47:45,683 INFO L231 Difference]: Finished difference. Result has 214 places, 167 transitions, 1955 flow [2022-12-13 21:47:45,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1955, PETRI_PLACES=214, PETRI_TRANSITIONS=167} [2022-12-13 21:47:45,684 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 155 predicate places. [2022-12-13 21:47:45,684 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 167 transitions, 1955 flow [2022-12-13 21:47:45,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 181.025) internal successors, (7241), 40 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:45,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:47:45,685 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 21:47:45,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:47:45,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:47:45,886 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 21:47:45,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:47:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2012167363, now seen corresponding path program 1 times [2022-12-13 21:47:45,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:47:45,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521178541] [2022-12-13 21:47:45,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:47:45,888 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 21:47:45,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:47:45,891 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:47:45,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:47:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:47:46,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 21:47:46,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:47:46,365 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 21:47:46,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:47:46,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:47:46,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521178541] [2022-12-13 21:47:46,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521178541] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:47:46,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:47:46,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:47:46,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819226297] [2022-12-13 21:47:46,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:47:46,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 21:47:46,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:47:46,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 21:47:46,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:47:46,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 479 [2022-12-13 21:47:46,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 167 transitions, 1955 flow. Second operand has 6 states, 6 states have (on average 195.66666666666666) internal successors, (1174), 6 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:46,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:47:46,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 479 [2022-12-13 21:47:46,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:47:58,153 INFO L130 PetriNetUnfolder]: 36953/58660 cut-off events. [2022-12-13 21:47:58,153 INFO L131 PetriNetUnfolder]: For 22569/22569 co-relation queries the response was YES. [2022-12-13 21:47:58,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162993 conditions, 58660 events. 36953/58660 cut-off events. For 22569/22569 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 430624 event pairs, 11544 based on Foata normal form. 111/41677 useless extension candidates. Maximal degree in co-relation 162906. Up to 25675 conditions per place. [2022-12-13 21:47:58,836 INFO L137 encePairwiseOnDemand]: 472/479 looper letters, 154 selfloop transitions, 45 changer transitions 2/203 dead transitions. [2022-12-13 21:47:58,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 203 transitions, 2467 flow [2022-12-13 21:47:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:47:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:47:58,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1216 transitions. [2022-12-13 21:47:58,839 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4231036882393876 [2022-12-13 21:47:58,839 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1216 transitions. [2022-12-13 21:47:58,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1216 transitions. [2022-12-13 21:47:58,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:47:58,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1216 transitions. [2022-12-13 21:47:58,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.66666666666666) internal successors, (1216), 6 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:58,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:58,843 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:58,843 INFO L175 Difference]: Start difference. First operand has 214 places, 167 transitions, 1955 flow. Second operand 6 states and 1216 transitions. [2022-12-13 21:47:58,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 203 transitions, 2467 flow [2022-12-13 21:47:58,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 203 transitions, 2310 flow, removed 20 selfloop flow, removed 17 redundant places. [2022-12-13 21:47:58,898 INFO L231 Difference]: Finished difference. Result has 203 places, 169 transitions, 1902 flow [2022-12-13 21:47:58,898 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1798, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1902, PETRI_PLACES=203, PETRI_TRANSITIONS=169} [2022-12-13 21:47:58,899 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 144 predicate places. [2022-12-13 21:47:58,899 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 169 transitions, 1902 flow [2022-12-13 21:47:58,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 195.66666666666666) internal successors, (1174), 6 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:58,899 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:47:58,899 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 21:47:58,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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)] Forceful destruction successful, exit code 0 [2022-12-13 21:47:59,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:47:59,101 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 21:47:59,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:47:59,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1917096169, now seen corresponding path program 1 times [2022-12-13 21:47:59,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:47:59,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407889027] [2022-12-13 21:47:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:47:59,103 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 21:47:59,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:47:59,106 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:47:59,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:47:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:47:59,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 21:47:59,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:47:59,889 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 21:47:59,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:47:59,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:47:59,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407889027] [2022-12-13 21:47:59,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407889027] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:47:59,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:47:59,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 21:47:59,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038153603] [2022-12-13 21:47:59,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:47:59,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 21:47:59,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:47:59,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 21:47:59,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:48:02,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 21:48:03,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 21:48:06,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 21:48:08,950 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 479 [2022-12-13 21:48:08,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 169 transitions, 1902 flow. Second operand has 6 states, 6 states have (on average 181.83333333333334) internal successors, (1091), 6 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:08,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:48:08,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 479 [2022-12-13 21:48:08,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:48:10,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 21:48:13,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 21:48:15,604 WARN L539 Checker$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 21:48:17,830 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 21:48:30,370 INFO L130 PetriNetUnfolder]: 42098/68209 cut-off events. [2022-12-13 21:48:30,370 INFO L131 PetriNetUnfolder]: For 49478/49478 co-relation queries the response was YES. [2022-12-13 21:48:31,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197673 conditions, 68209 events. 42098/68209 cut-off events. For 49478/49478 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 519362 event pairs, 11985 based on Foata normal form. 666/57775 useless extension candidates. Maximal degree in co-relation 197584. Up to 59941 conditions per place. [2022-12-13 21:48:31,237 INFO L137 encePairwiseOnDemand]: 469/479 looper letters, 172 selfloop transitions, 9 changer transitions 15/198 dead transitions. [2022-12-13 21:48:31,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 198 transitions, 2368 flow [2022-12-13 21:48:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:48:31,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:48:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1128 transitions. [2022-12-13 21:48:31,241 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3924843423799583 [2022-12-13 21:48:31,241 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1128 transitions. [2022-12-13 21:48:31,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1128 transitions. [2022-12-13 21:48:31,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:48:31,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1128 transitions. [2022-12-13 21:48:31,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:31,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:31,244 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:31,244 INFO L175 Difference]: Start difference. First operand has 203 places, 169 transitions, 1902 flow. Second operand 6 states and 1128 transitions. [2022-12-13 21:48:31,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 198 transitions, 2368 flow [2022-12-13 21:48:31,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 198 transitions, 2323 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 21:48:31,412 INFO L231 Difference]: Finished difference. Result has 209 places, 176 transitions, 1918 flow [2022-12-13 21:48:31,412 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1918, PETRI_PLACES=209, PETRI_TRANSITIONS=176} [2022-12-13 21:48:31,412 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 150 predicate places. [2022-12-13 21:48:31,413 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 176 transitions, 1918 flow [2022-12-13 21:48:31,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 181.83333333333334) internal successors, (1091), 6 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:31,413 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:48:31,413 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 21:48:31,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:48:31,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:48:31,615 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 21:48:31,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:48:31,616 INFO L85 PathProgramCache]: Analyzing trace with hash 996621014, now seen corresponding path program 1 times [2022-12-13 21:48:31,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:48:31,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134880918] [2022-12-13 21:48:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:48:31,618 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 21:48:31,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:48:31,621 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:48:31,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:48:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:48:31,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 21:48:31,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:48:31,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:48:31,849 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 21:48:31,871 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 21:48:31,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:48:31,988 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-12-13 21:48:31,988 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 21:48:32,046 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 21:48:32,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:48:32,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134880918] [2022-12-13 21:48:32,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134880918] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:48:32,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:48:32,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 21:48:32,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215400702] [2022-12-13 21:48:32,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:48:32,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 21:48:32,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:48:32,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 21:48:32,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:48:32,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 479 [2022-12-13 21:48:32,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 176 transitions, 1918 flow. Second operand has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:32,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:48:32,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 479 [2022-12-13 21:48:32,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:48:49,430 INFO L130 PetriNetUnfolder]: 54086/87190 cut-off events. [2022-12-13 21:48:49,430 INFO L131 PetriNetUnfolder]: For 89682/89904 co-relation queries the response was YES. [2022-12-13 21:48:50,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282366 conditions, 87190 events. 54086/87190 cut-off events. For 89682/89904 co-relation queries the response was YES. Maximal size of possible extension queue 1173. Compared 683013 event pairs, 7101 based on Foata normal form. 0/73537 useless extension candidates. Maximal degree in co-relation 282274. Up to 51838 conditions per place. [2022-12-13 21:48:50,614 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 203 selfloop transitions, 10 changer transitions 0/215 dead transitions. [2022-12-13 21:48:50,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 215 transitions, 2498 flow [2022-12-13 21:48:50,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:48:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:48:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1178 transitions. [2022-12-13 21:48:50,617 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40988169798190677 [2022-12-13 21:48:50,617 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1178 transitions. [2022-12-13 21:48:50,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1178 transitions. [2022-12-13 21:48:50,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:48:50,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1178 transitions. [2022-12-13 21:48:50,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.33333333333334) internal successors, (1178), 6 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:50,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:50,621 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:50,621 INFO L175 Difference]: Start difference. First operand has 209 places, 176 transitions, 1918 flow. Second operand 6 states and 1178 transitions. [2022-12-13 21:48:50,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 215 transitions, 2498 flow [2022-12-13 21:48:53,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 215 transitions, 2496 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 21:48:53,317 INFO L231 Difference]: Finished difference. Result has 217 places, 182 transitions, 1992 flow [2022-12-13 21:48:53,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1916, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1992, PETRI_PLACES=217, PETRI_TRANSITIONS=182} [2022-12-13 21:48:53,317 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 158 predicate places. [2022-12-13 21:48:53,317 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 182 transitions, 1992 flow [2022-12-13 21:48:53,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:53,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:48:53,317 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 21:48:53,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:48:53,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:48:53,519 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 21:48:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:48:53,520 INFO L85 PathProgramCache]: Analyzing trace with hash -180717222, now seen corresponding path program 2 times [2022-12-13 21:48:53,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:48:53,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304294385] [2022-12-13 21:48:53,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:48:53,522 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 21:48:53,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:48:53,525 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:48:53,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:48:53,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:48:53,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:48:53,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 21:48:53,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:48:53,804 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 18 treesize of output 16 [2022-12-13 21:48:53,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-12-13 21:48:53,990 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:48:53,991 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 21:48:54,025 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 21:48:54,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:48:54,125 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1130 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1130) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2022-12-13 21:48:54,266 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-13 21:48:54,266 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 138 treesize of output 116 [2022-12-13 21:48:54,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:48:54,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 30 [2022-12-13 21:48:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2022-12-13 21:48:54,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:48:54,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304294385] [2022-12-13 21:48:54,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304294385] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:48:54,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:48:54,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-12-13 21:48:54,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391390219] [2022-12-13 21:48:54,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:48:54,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 21:48:54,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:48:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 21:48:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=86, Unknown=1, NotChecked=18, Total=132 [2022-12-13 21:48:54,719 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 479 [2022-12-13 21:48:54,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 182 transitions, 1992 flow. Second operand has 12 states, 12 states have (on average 164.25) internal successors, (1971), 12 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:54,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:48:54,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 479 [2022-12-13 21:48:54,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:48:57,016 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 21:49:18,194 INFO L130 PetriNetUnfolder]: 64742/103840 cut-off events. [2022-12-13 21:49:18,194 INFO L131 PetriNetUnfolder]: For 211263/211707 co-relation queries the response was YES. [2022-12-13 21:49:19,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375092 conditions, 103840 events. 64742/103840 cut-off events. For 211263/211707 co-relation queries the response was YES. Maximal size of possible extension queue 1377. Compared 832983 event pairs, 9099 based on Foata normal form. 888/95071 useless extension candidates. Maximal degree in co-relation 374995. Up to 54280 conditions per place. [2022-12-13 21:49:19,597 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 178 selfloop transitions, 38 changer transitions 0/218 dead transitions. [2022-12-13 21:49:19,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 218 transitions, 2576 flow [2022-12-13 21:49:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:49:19,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:49:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1195 transitions. [2022-12-13 21:49:19,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35639725618848794 [2022-12-13 21:49:19,602 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1195 transitions. [2022-12-13 21:49:19,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1195 transitions. [2022-12-13 21:49:19,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:49:19,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1195 transitions. [2022-12-13 21:49:19,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 170.71428571428572) internal successors, (1195), 7 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:19,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:19,607 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:19,607 INFO L175 Difference]: Start difference. First operand has 217 places, 182 transitions, 1992 flow. Second operand 7 states and 1195 transitions. [2022-12-13 21:49:19,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 218 transitions, 2576 flow [2022-12-13 21:49:24,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 218 transitions, 2559 flow, removed 7 selfloop flow, removed 1 redundant places. [2022-12-13 21:49:24,385 INFO L231 Difference]: Finished difference. Result has 225 places, 185 transitions, 2099 flow [2022-12-13 21:49:24,385 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=1977, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2099, PETRI_PLACES=225, PETRI_TRANSITIONS=185} [2022-12-13 21:49:24,385 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 166 predicate places. [2022-12-13 21:49:24,385 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 185 transitions, 2099 flow [2022-12-13 21:49:24,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.25) internal successors, (1971), 12 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:24,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:49:24,386 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 21:49:24,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:49:24,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:49:24,587 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 21:49:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:49:24,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1170147917, now seen corresponding path program 2 times [2022-12-13 21:49:24,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:49:24,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062684707] [2022-12-13 21:49:24,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:49:24,590 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 21:49:24,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:49:24,593 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:49:24,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:49:24,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:49:24,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:49:24,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 21:49:24,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:49:24,929 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 21:49:24,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:49:24,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:49:24,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062684707] [2022-12-13 21:49:24,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062684707] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:49:24,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:49:24,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:49:24,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537515509] [2022-12-13 21:49:24,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:49:24,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:49:24,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:49:24,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:49:24,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:49:25,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2022-12-13 21:49:25,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 185 transitions, 2099 flow. Second operand has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:25,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:49:25,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2022-12-13 21:49:25,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:49:44,474 INFO L130 PetriNetUnfolder]: 59528/96373 cut-off events. [2022-12-13 21:49:44,474 INFO L131 PetriNetUnfolder]: For 284830/285274 co-relation queries the response was YES. [2022-12-13 21:49:45,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380985 conditions, 96373 events. 59528/96373 cut-off events. For 284830/285274 co-relation queries the response was YES. Maximal size of possible extension queue 1401. Compared 784267 event pairs, 9990 based on Foata normal form. 1554/89047 useless extension candidates. Maximal degree in co-relation 380884. Up to 68044 conditions per place. [2022-12-13 21:49:45,886 INFO L137 encePairwiseOnDemand]: 473/479 looper letters, 190 selfloop transitions, 9 changer transitions 0/202 dead transitions. [2022-12-13 21:49:45,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 202 transitions, 2556 flow [2022-12-13 21:49:45,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:49:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:49:45,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 799 transitions. [2022-12-13 21:49:45,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41701461377870563 [2022-12-13 21:49:45,889 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 799 transitions. [2022-12-13 21:49:45,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 799 transitions. [2022-12-13 21:49:45,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:49:45,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 799 transitions. [2022-12-13 21:49:45,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:45,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:45,891 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:45,891 INFO L175 Difference]: Start difference. First operand has 225 places, 185 transitions, 2099 flow. Second operand 4 states and 799 transitions. [2022-12-13 21:49:45,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 202 transitions, 2556 flow [2022-12-13 21:49:50,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 202 transitions, 2491 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 21:49:50,636 INFO L231 Difference]: Finished difference. Result has 226 places, 187 transitions, 2077 flow [2022-12-13 21:49:50,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2077, PETRI_PLACES=226, PETRI_TRANSITIONS=187} [2022-12-13 21:49:50,637 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 167 predicate places. [2022-12-13 21:49:50,637 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 187 transitions, 2077 flow [2022-12-13 21:49:50,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:50,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:49:50,637 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 21:49:50,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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)] Ended with exit code 0 [2022-12-13 21:49:50,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:49:50,839 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:49:50,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:49:50,840 INFO L85 PathProgramCache]: Analyzing trace with hash 898636027, now seen corresponding path program 3 times [2022-12-13 21:49:50,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:49:50,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160636727] [2022-12-13 21:49:50,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:49:50,841 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 21:49:50,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:49:50,844 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:49:50,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 (31)] Waiting until timeout for monitored process [2022-12-13 21:49:51,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 21:49:51,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:49:51,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 21:49:51,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:49:51,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:49:51,744 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-13 21:49:51,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 136 treesize of output 125 [2022-12-13 21:49:51,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:49:51,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 60 [2022-12-13 21:49:51,978 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 21:49:51,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:49:51,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:49:51,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160636727] [2022-12-13 21:49:51,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160636727] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:49:51,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:49:51,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 21:49:51,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220621275] [2022-12-13 21:49:51,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:49:51,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 21:49:51,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:49:51,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 21:49:51,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:49:55,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 21:49:57,586 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 479 [2022-12-13 21:49:57,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 187 transitions, 2077 flow. Second operand has 9 states, 9 states have (on average 174.55555555555554) internal successors, (1571), 9 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:57,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:49:57,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 479 [2022-12-13 21:49:57,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:50:00,708 WARN L539 Checker$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 21:50:02,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 21:50:04,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 21:50:28,123 INFO L130 PetriNetUnfolder]: 67406/109945 cut-off events. [2022-12-13 21:50:28,123 INFO L131 PetriNetUnfolder]: For 358227/358671 co-relation queries the response was YES. [2022-12-13 21:50:29,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439921 conditions, 109945 events. 67406/109945 cut-off events. For 358227/358671 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 902828 event pairs, 24861 based on Foata normal form. 666/100510 useless extension candidates. Maximal degree in co-relation 439819. Up to 99679 conditions per place. [2022-12-13 21:50:29,865 INFO L137 encePairwiseOnDemand]: 470/479 looper letters, 182 selfloop transitions, 7 changer transitions 23/214 dead transitions. [2022-12-13 21:50:29,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 214 transitions, 2574 flow [2022-12-13 21:50:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:50:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:50:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1269 transitions. [2022-12-13 21:50:29,869 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37846704443781687 [2022-12-13 21:50:29,869 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1269 transitions. [2022-12-13 21:50:29,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1269 transitions. [2022-12-13 21:50:29,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:50:29,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1269 transitions. [2022-12-13 21:50:29,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 181.28571428571428) internal successors, (1269), 7 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:50:29,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:50:29,873 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 479.0) internal successors, (3832), 8 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:50:29,873 INFO L175 Difference]: Start difference. First operand has 226 places, 187 transitions, 2077 flow. Second operand 7 states and 1269 transitions. [2022-12-13 21:50:29,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 214 transitions, 2574 flow [2022-12-13 21:50:48,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 214 transitions, 2551 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-13 21:50:48,828 INFO L231 Difference]: Finished difference. Result has 231 places, 185 transitions, 2057 flow [2022-12-13 21:50:48,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2057, PETRI_PLACES=231, PETRI_TRANSITIONS=185} [2022-12-13 21:50:48,828 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 172 predicate places. [2022-12-13 21:50:48,828 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 185 transitions, 2057 flow [2022-12-13 21:50:48,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 174.55555555555554) internal successors, (1571), 9 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 21:50:48,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:50:48,829 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 21:50:48,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 (31)] Ended with exit code 0 [2022-12-13 21:50:49,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:50:49,030 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:50:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:50:49,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1947055233, now seen corresponding path program 4 times [2022-12-13 21:50:49,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:50:49,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144898500] [2022-12-13 21:50:49,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 21:50:49,033 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 21:50:49,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:50:49,036 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:50:49,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 (32)] Waiting until timeout for monitored process [2022-12-13 21:50:49,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 21:50:49,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:50:49,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 21:50:49,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:50:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:50:49,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:50:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:50:50,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:50:50,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144898500] [2022-12-13 21:50:50,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144898500] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:50:50,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:50:50,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-12-13 21:50:50,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515991199] [2022-12-13 21:50:50,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:50:50,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 21:50:50,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:50:50,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 21:50:50,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2022-12-13 21:50:52,022 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 479 [2022-12-13 21:50:52,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 185 transitions, 2057 flow. Second operand has 15 states, 15 states have (on average 183.66666666666666) internal successors, (2755), 15 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:50:52,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:50:52,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 479 [2022-12-13 21:50:52,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:25,204 INFO L130 PetriNetUnfolder]: 89891/146695 cut-off events. [2022-12-13 21:51:25,204 INFO L131 PetriNetUnfolder]: For 381105/381537 co-relation queries the response was YES. [2022-12-13 21:51:27,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586385 conditions, 146695 events. 89891/146695 cut-off events. For 381105/381537 co-relation queries the response was YES. Maximal size of possible extension queue 2109. Compared 1262480 event pairs, 9456 based on Foata normal form. 7296/140506 useless extension candidates. Maximal degree in co-relation 586282. Up to 52915 conditions per place. [2022-12-13 21:51:27,490 INFO L137 encePairwiseOnDemand]: 471/479 looper letters, 201 selfloop transitions, 53 changer transitions 22/279 dead transitions. [2022-12-13 21:51:27,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 279 transitions, 3149 flow [2022-12-13 21:51:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 21:51:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 21:51:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2101 transitions. [2022-12-13 21:51:27,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3987473903966597 [2022-12-13 21:51:27,495 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2101 transitions. [2022-12-13 21:51:27,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2101 transitions. [2022-12-13 21:51:27,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:27,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2101 transitions. [2022-12-13 21:51:27,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 191.0) internal successors, (2101), 11 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:27,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:27,500 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:27,500 INFO L175 Difference]: Start difference. First operand has 231 places, 185 transitions, 2057 flow. Second operand 11 states and 2101 transitions. [2022-12-13 21:51:27,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 279 transitions, 3149 flow [2022-12-13 21:51:48,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 279 transitions, 3103 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-12-13 21:51:48,196 INFO L231 Difference]: Finished difference. Result has 236 places, 196 transitions, 2263 flow [2022-12-13 21:51:48,196 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2263, PETRI_PLACES=236, PETRI_TRANSITIONS=196} [2022-12-13 21:51:48,196 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 177 predicate places. [2022-12-13 21:51:48,196 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 196 transitions, 2263 flow [2022-12-13 21:51:48,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 183.66666666666666) internal successors, (2755), 15 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:48,196 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:48,197 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 21:51:48,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 (32)] Ended with exit code 0 [2022-12-13 21:51:48,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:51:48,398 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 21:51:48,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:48,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1931536510, now seen corresponding path program 3 times [2022-12-13 21:51:48,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:51:48,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383713586] [2022-12-13 21:51:48,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:51:48,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:51:48,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:51:48,404 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 21:51:48,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e342507-424c-43fa-b784-fc72381df3c1/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 (33)] Waiting until timeout for monitored process [2022-12-13 21:51:48,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 21:51:48,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:48,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 21:51:48,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:48,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:51:49,116 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:51:49,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383713586] [2022-12-13 21:51:49,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383713586] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:49,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:51:49,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 21:51:49,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861868196] [2022-12-13 21:51:49,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:49,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 21:51:49,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:51:49,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 21:51:49,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 21:51:49,999 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 479 [2022-12-13 21:51:50,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 196 transitions, 2263 flow. Second operand has 10 states, 10 states have (on average 186.3) internal successors, (1863), 10 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:50,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:50,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 479 [2022-12-13 21:51:50,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand