./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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_21883586-a2c6-4180-b05e-35209915ca0f/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 ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --- 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 12:27:53,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:27:53,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:27:53,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:27:53,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:27:53,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:27:53,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:27:53,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:27:53,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:27:53,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:27:53,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:27:53,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:27:53,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:27:53,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:27:53,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:27:53,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:27:53,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:27:53,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:27:53,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:27:53,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:27:53,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:27:53,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:27:53,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:27:53,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:27:53,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:27:53,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:27:53,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:27:53,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:27:53,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:27:53,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:27:53,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:27:53,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:27:53,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:27:53,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:27:53,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:27:53,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:27:53,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:27:53,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:27:53,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:27:53,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:27:53,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:27:53,437 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 12:27:53,452 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:27:53,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:27:53,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:27:53,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:27:53,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:27:53,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:27:53,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:27:53,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:27:53,454 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:27:53,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:27:53,454 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:27:53,454 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 12:27:53,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:27:53,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:27:53,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:27:53,455 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 12:27:53,455 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 12:27:53,455 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 12:27:53,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:27:53,455 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 12:27:53,455 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:27:53,455 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:27:53,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:27:53,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:27:53,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:27:53,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:27:53,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:27:53,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:27:53,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:27:53,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:27:53,456 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:27:53,457 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:27:53,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:27:53,457 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:27:53,457 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_21883586-a2c6-4180-b05e-35209915ca0f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2022-12-13 12:27:53,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:27:53,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:27:53,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:27:53,669 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:27:53,669 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:27:53,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-12-13 12:27:56,256 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:27:56,396 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:27:56,397 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-12-13 12:27:56,402 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/data/92e20ab1f/86a222ac0d184408b369b621a0934d57/FLAG95f24198a [2022-12-13 12:27:56,415 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/data/92e20ab1f/86a222ac0d184408b369b621a0934d57 [2022-12-13 12:27:56,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:27:56,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:27:56,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:27:56,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:27:56,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:27:56,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:27:56" (1/1) ... [2022-12-13 12:27:56,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6925e22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:27:56, skipping insertion in model container [2022-12-13 12:27:56,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:27:56" (1/1) ... [2022-12-13 12:27:56,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:27:56,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:27:56,569 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:27:56,570 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:27:56,572 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:27:56,573 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:27:56,574 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:27:56,575 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:27:56,581 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_21883586-a2c6-4180-b05e-35209915ca0f/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-12-13 12:27:56,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:27:56,597 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 12:27:56,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3d943b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:27:56, skipping insertion in model container [2022-12-13 12:27:56,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:27:56,598 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 12:27:56,599 INFO L158 Benchmark]: Toolchain (without parser) took 180.49ms. Allocated memory is still 163.6MB. Free memory was 123.5MB in the beginning and 113.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 12:27:56,600 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 163.6MB. Free memory is still 105.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 12:27:56,600 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.16ms. Allocated memory is still 163.6MB. Free memory was 123.5MB in the beginning and 113.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 12:27:56,601 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 163.6MB. Free memory is still 105.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 178.16ms. Allocated memory is still 163.6MB. Free memory was 123.5MB in the beginning and 113.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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_21883586-a2c6-4180-b05e-35209915ca0f/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 ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --- 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 12:27:58,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:27:58,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:27:58,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:27:58,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:27:58,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:27:58,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:27:58,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:27:58,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:27:58,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:27:58,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:27:58,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:27:58,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:27:58,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:27:58,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:27:58,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:27:58,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:27:58,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:27:58,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:27:58,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:27:58,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:27:58,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:27:58,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:27:58,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:27:58,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:27:58,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:27:58,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:27:58,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:27:58,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:27:58,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:27:58,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:27:58,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:27:58,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:27:58,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:27:58,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:27:58,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:27:58,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:27:58,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:27:58,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:27:58,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:27:58,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:27:58,239 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 12:27:58,261 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:27:58,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:27:58,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:27:58,262 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:27:58,262 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:27:58,263 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:27:58,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:27:58,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:27:58,263 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:27:58,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:27:58,264 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:27:58,264 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 12:27:58,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:27:58,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:27:58,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:27:58,264 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 12:27:58,265 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 12:27:58,265 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 12:27:58,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:27:58,265 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 12:27:58,265 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 12:27:58,265 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 12:27:58,265 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:27:58,265 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:27:58,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:27:58,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:27:58,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:27:58,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:27:58,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:27:58,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:27:58,266 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 12:27:58,266 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 12:27:58,266 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:27:58,267 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:27:58,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:27:58,267 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 12:27:58,267 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:27:58,267 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_21883586-a2c6-4180-b05e-35209915ca0f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2022-12-13 12:27:58,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:27:58,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:27:58,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:27:58,532 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:27:58,532 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:27:58,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-12-13 12:28:01,121 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:28:01,277 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:28:01,277 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-12-13 12:28:01,283 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/data/49b41d7d6/b4b2363a4c584e57ad9a1640864e5b23/FLAGa38df1f52 [2022-12-13 12:28:01,295 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/data/49b41d7d6/b4b2363a4c584e57ad9a1640864e5b23 [2022-12-13 12:28:01,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:28:01,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:28:01,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:28:01,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:28:01,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:28:01,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:28:01" (1/1) ... [2022-12-13 12:28:01,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f096cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:01, skipping insertion in model container [2022-12-13 12:28:01,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:28:01" (1/1) ... [2022-12-13 12:28:01,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:28:01,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:28:01,464 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:28:01,466 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:28:01,470 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:28:01,471 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:28:01,472 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:28:01,473 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:28:01,481 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_21883586-a2c6-4180-b05e-35209915ca0f/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-12-13 12:28:01,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:28:01,504 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 12:28:01,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:28:01,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:28:01,511 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:28:01,512 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:28:01,513 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:28:01,514 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:28:01,514 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:28:01,517 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_21883586-a2c6-4180-b05e-35209915ca0f/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-12-13 12:28:01,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:28:01,524 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:28:01,534 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:28:01,535 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:28:01,536 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:28:01,536 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:28:01,537 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:28:01,538 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:28:01,541 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_21883586-a2c6-4180-b05e-35209915ca0f/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-12-13 12:28:01,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:28:01,556 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:28:01,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:01 WrapperNode [2022-12-13 12:28:01,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:28:01,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:28:01,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:28:01,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:28:01,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:01" (1/1) ... [2022-12-13 12:28:01,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:01" (1/1) ... [2022-12-13 12:28:01,587 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 99 [2022-12-13 12:28:01,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:28:01,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:28:01,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:28:01,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:28:01,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:01" (1/1) ... [2022-12-13 12:28:01,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:01" (1/1) ... [2022-12-13 12:28:01,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:01" (1/1) ... [2022-12-13 12:28:01,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:01" (1/1) ... [2022-12-13 12:28:01,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:01" (1/1) ... [2022-12-13 12:28:01,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:01" (1/1) ... [2022-12-13 12:28:01,609 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:01" (1/1) ... [2022-12-13 12:28:01,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:01" (1/1) ... [2022-12-13 12:28:01,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:28:01,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:28:01,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:28:01,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:28:01,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:01" (1/1) ... [2022-12-13 12:28:01,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:28:01,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:28:01,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:28:01,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:28:01,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:28:01,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 12:28:01,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:28:01,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 12:28:01,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 12:28:01,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 12:28:01,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 12:28:01,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 12:28:01,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 12:28:01,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 12:28:01,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 12:28:01,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 12:28:01,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 12:28:01,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:28:01,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:28:01,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:28:01,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 12:28:01,690 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 12:28:01,782 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:28:01,783 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:28:02,184 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:28:02,258 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:28:02,258 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 12:28:02,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:28:02 BoogieIcfgContainer [2022-12-13 12:28:02,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:28:02,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:28:02,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:28:02,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:28:02,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:28:01" (1/3) ... [2022-12-13 12:28:02,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec2eba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:28:02, skipping insertion in model container [2022-12-13 12:28:02,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:01" (2/3) ... [2022-12-13 12:28:02,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec2eba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:28:02, skipping insertion in model container [2022-12-13 12:28:02,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:28:02" (3/3) ... [2022-12-13 12:28:02,266 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2022-12-13 12:28:02,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:28:02,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-13 12:28:02,289 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 12:28:02,368 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 12:28:02,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 181 transitions, 386 flow [2022-12-13 12:28:02,466 INFO L130 PetriNetUnfolder]: 12/178 cut-off events. [2022-12-13 12:28:02,466 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 12:28:02,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 178 events. 12/178 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2022-12-13 12:28:02,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 181 transitions, 386 flow [2022-12-13 12:28:02,477 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 173 transitions, 364 flow [2022-12-13 12:28:02,481 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:28:02,491 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 173 transitions, 364 flow [2022-12-13 12:28:02,494 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 173 transitions, 364 flow [2022-12-13 12:28:02,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 173 transitions, 364 flow [2022-12-13 12:28:02,531 INFO L130 PetriNetUnfolder]: 12/173 cut-off events. [2022-12-13 12:28:02,531 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 12:28:02,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 173 events. 12/173 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2022-12-13 12:28:02,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-12-13 12:28:25,597 INFO L134 LiptonReduction]: Checked pairs total: 3566 [2022-12-13 12:28:25,598 INFO L136 LiptonReduction]: Total number of compositions: 180 [2022-12-13 12:28:25,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:28:25,618 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;@5c6d3e85, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:28:25,618 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-12-13 12:28:25,621 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 12:28:25,621 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:28:25,621 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:25,622 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:28:25,622 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:28:25,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:25,626 INFO L85 PathProgramCache]: Analyzing trace with hash 23328, now seen corresponding path program 1 times [2022-12-13 12:28:25,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:28:25,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912121174] [2022-12-13 12:28:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:25,635 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 12:28:25,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:28:25,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:25,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:25,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 12:28:25,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:28:25,887 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:28:25,888 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 12:28:25,930 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 12:28:25,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:28:25,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:28:25,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912121174] [2022-12-13 12:28:25,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912121174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:25,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:25,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:25,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123287696] [2022-12-13 12:28:25,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:25,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:25,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:28:25,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:25,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:26,164 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 361 [2022-12-13 12:28:26,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:26,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:26,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 361 [2022-12-13 12:28:26,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:27,078 INFO L130 PetriNetUnfolder]: 5423/6918 cut-off events. [2022-12-13 12:28:27,079 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2022-12-13 12:28:27,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13966 conditions, 6918 events. 5423/6918 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 31090 event pairs, 2585 based on Foata normal form. 0/1944 useless extension candidates. Maximal degree in co-relation 5996. Up to 3433 conditions per place. [2022-12-13 12:28:27,128 INFO L137 encePairwiseOnDemand]: 351/361 looper letters, 78 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-12-13 12:28:27,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 362 flow [2022-12-13 12:28:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:27,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2022-12-13 12:28:27,142 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5032317636195752 [2022-12-13 12:28:27,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2022-12-13 12:28:27,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2022-12-13 12:28:27,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:27,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2022-12-13 12:28:27,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:27,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:27,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:27,160 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 120 flow. Second operand 3 states and 545 transitions. [2022-12-13 12:28:27,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 362 flow [2022-12-13 12:28:27,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 338 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 12:28:27,173 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2022-12-13 12:28:27,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2022-12-13 12:28:27,178 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2022-12-13 12:28:27,179 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2022-12-13 12:28:27,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:27,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:27,179 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:28:27,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:27,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:27,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:28:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash 23485, now seen corresponding path program 1 times [2022-12-13 12:28:27,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:28:27,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935329451] [2022-12-13 12:28:27,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:27,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 12:28:27,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:28:27,386 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:27,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:27,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 12:28:27,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:28:27,557 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 12:28:27,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:28:27,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:28:27,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935329451] [2022-12-13 12:28:27,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935329451] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:27,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:27,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:27,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334693839] [2022-12-13 12:28:27,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:27,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:27,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:28:27,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:27,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:27,613 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 361 [2022-12-13 12:28:27,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:27,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:27,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 361 [2022-12-13 12:28:27,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:28,109 INFO L130 PetriNetUnfolder]: 2717/3467 cut-off events. [2022-12-13 12:28:28,109 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 12:28:28,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6944 conditions, 3467 events. 2717/3467 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 14218 event pairs, 1294 based on Foata normal form. 0/975 useless extension candidates. Maximal degree in co-relation 6931. Up to 3436 conditions per place. [2022-12-13 12:28:28,124 INFO L137 encePairwiseOnDemand]: 356/361 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2022-12-13 12:28:28,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 194 flow [2022-12-13 12:28:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2022-12-13 12:28:28,127 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46352723915050786 [2022-12-13 12:28:28,127 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2022-12-13 12:28:28,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2022-12-13 12:28:28,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:28,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2022-12-13 12:28:28,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:28,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:28,133 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:28,133 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 502 transitions. [2022-12-13 12:28:28,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 194 flow [2022-12-13 12:28:28,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:28:28,135 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 116 flow [2022-12-13 12:28:28,136 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2022-12-13 12:28:28,136 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2022-12-13 12:28:28,136 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 116 flow [2022-12-13 12:28:28,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:28,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:28,137 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:28:28,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:28,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:28,338 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:28:28,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:28,339 INFO L85 PathProgramCache]: Analyzing trace with hash 23327, now seen corresponding path program 1 times [2022-12-13 12:28:28,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:28:28,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639661906] [2022-12-13 12:28:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:28,340 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 12:28:28,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:28:28,341 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:28,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:28,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 12:28:28,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:28:28,455 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 12:28:28,455 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 12:28:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:28,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:28:28,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:28:28,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639661906] [2022-12-13 12:28:28,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639661906] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:28,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:28,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:28,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183824413] [2022-12-13 12:28:28,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:28,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:28,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:28:28,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:28,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:28,554 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 361 [2022-12-13 12:28:28,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:28,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:28,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 361 [2022-12-13 12:28:28,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:28,982 INFO L130 PetriNetUnfolder]: 2717/3465 cut-off events. [2022-12-13 12:28:28,982 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 12:28:28,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6946 conditions, 3465 events. 2717/3465 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 14061 event pairs, 1294 based on Foata normal form. 2/976 useless extension candidates. Maximal degree in co-relation 6932. Up to 3435 conditions per place. [2022-12-13 12:28:29,003 INFO L137 encePairwiseOnDemand]: 359/361 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-12-13 12:28:29,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 196 flow [2022-12-13 12:28:29,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:29,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:29,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2022-12-13 12:28:29,006 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4533702677746999 [2022-12-13 12:28:29,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2022-12-13 12:28:29,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2022-12-13 12:28:29,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:29,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2022-12-13 12:28:29,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:29,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:29,014 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:29,014 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 116 flow. Second operand 3 states and 491 transitions. [2022-12-13 12:28:29,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 196 flow [2022-12-13 12:28:29,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 12:28:29,017 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 110 flow [2022-12-13 12:28:29,017 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2022-12-13 12:28:29,018 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2022-12-13 12:28:29,018 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 110 flow [2022-12-13 12:28:29,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:29,019 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:29,019 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 12:28:29,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:29,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:29,219 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:28:29,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:29,220 INFO L85 PathProgramCache]: Analyzing trace with hash 727555, now seen corresponding path program 1 times [2022-12-13 12:28:29,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:28:29,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742414015] [2022-12-13 12:28:29,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:29,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 12:28:29,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:28:29,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:29,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:29,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:28:29,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:28:29,377 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:28:29,377 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 12:28:29,431 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 12:28:29,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:28:29,592 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 12:28:29,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:28:29,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742414015] [2022-12-13 12:28:29,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742414015] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:28:29,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:28:29,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 12:28:29,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042132787] [2022-12-13 12:28:29,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:28:29,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:28:29,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:28:29,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:28:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:28:30,356 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 361 [2022-12-13 12:28:30,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 110 flow. Second operand has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:30,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:30,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 361 [2022-12-13 12:28:30,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:31,464 INFO L130 PetriNetUnfolder]: 5429/6925 cut-off events. [2022-12-13 12:28:31,464 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 12:28:31,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13876 conditions, 6925 events. 5429/6925 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 31439 event pairs, 2585 based on Foata normal form. 0/1951 useless extension candidates. Maximal degree in co-relation 13867. Up to 3432 conditions per place. [2022-12-13 12:28:31,485 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 76 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2022-12-13 12:28:31,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 90 transitions, 406 flow [2022-12-13 12:28:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:28:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:28:31,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 960 transitions. [2022-12-13 12:28:31,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44321329639889195 [2022-12-13 12:28:31,489 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 960 transitions. [2022-12-13 12:28:31,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 960 transitions. [2022-12-13 12:28:31,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:31,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 960 transitions. [2022-12-13 12:28:31,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:31,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:31,493 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:31,493 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 110 flow. Second operand 6 states and 960 transitions. [2022-12-13 12:28:31,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 90 transitions, 406 flow [2022-12-13 12:28:31,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 90 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:28:31,495 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 207 flow [2022-12-13 12:28:31,495 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2022-12-13 12:28:31,496 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2022-12-13 12:28:31,496 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 207 flow [2022-12-13 12:28:31,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:31,496 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:31,496 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 12:28:31,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 12:28:31,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:31,697 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:28:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:31,697 INFO L85 PathProgramCache]: Analyzing trace with hash 727712, now seen corresponding path program 1 times [2022-12-13 12:28:31,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:28:31,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602142682] [2022-12-13 12:28:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:31,698 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 12:28:31,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:28:31,699 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:31,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:31,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 12:28:31,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:28:31,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:28:31,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:28:31,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:28:31,843 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-12-13 12:28:31,844 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 3 case distinctions, treesize of input 17 treesize of output 35 [2022-12-13 12:28:31,861 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 12:28:31,861 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 12:28:32,117 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 12:28:32,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:28:32,268 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 12:28:32,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:28:32,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602142682] [2022-12-13 12:28:32,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602142682] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:28:32,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:28:32,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 12:28:32,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612933570] [2022-12-13 12:28:32,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:28:32,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:28:32,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:28:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:28:32,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:28:34,510 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 12:28:34,821 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 361 [2022-12-13 12:28:34,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 207 flow. Second operand has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:34,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:34,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 361 [2022-12-13 12:28:34,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:36,091 INFO L130 PetriNetUnfolder]: 4851/6222 cut-off events. [2022-12-13 12:28:36,091 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 12:28:36,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12501 conditions, 6222 events. 4851/6222 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 28212 event pairs, 2310 based on Foata normal form. 0/1802 useless extension candidates. Maximal degree in co-relation 12487. Up to 3423 conditions per place. [2022-12-13 12:28:36,109 INFO L137 encePairwiseOnDemand]: 354/361 looper letters, 72 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2022-12-13 12:28:36,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 445 flow [2022-12-13 12:28:36,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:28:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:28:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1074 transitions. [2022-12-13 12:28:36,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4250098931539375 [2022-12-13 12:28:36,113 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1074 transitions. [2022-12-13 12:28:36,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1074 transitions. [2022-12-13 12:28:36,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:36,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1074 transitions. [2022-12-13 12:28:36,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.42857142857142) internal successors, (1074), 7 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 12:28:36,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:36,119 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:36,119 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 207 flow. Second operand 7 states and 1074 transitions. [2022-12-13 12:28:36,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 445 flow [2022-12-13 12:28:36,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 425 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 12:28:36,122 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 197 flow [2022-12-13 12:28:36,122 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=197, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2022-12-13 12:28:36,122 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2022-12-13 12:28:36,123 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 197 flow [2022-12-13 12:28:36,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:36,123 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:36,123 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 12:28:36,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:36,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:36,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:28:36,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash 727711, now seen corresponding path program 1 times [2022-12-13 12:28:36,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:28:36,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929251576] [2022-12-13 12:28:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:36,325 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 12:28:36,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:28:36,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:36,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:36,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:28:36,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:28:36,436 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-12-13 12:28:36,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-12-13 12:28:36,498 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 12:28:36,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:28:36,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:28:36,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929251576] [2022-12-13 12:28:36,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929251576] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:36,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:36,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:36,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079338966] [2022-12-13 12:28:36,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:36,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:36,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:28:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:36,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:36,682 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 361 [2022-12-13 12:28:36,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:36,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:36,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 361 [2022-12-13 12:28:36,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:37,256 INFO L130 PetriNetUnfolder]: 3710/4828 cut-off events. [2022-12-13 12:28:37,256 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2022-12-13 12:28:37,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9806 conditions, 4828 events. 3710/4828 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 21926 event pairs, 1763 based on Foata normal form. 0/1601 useless extension candidates. Maximal degree in co-relation 9790. Up to 4768 conditions per place. [2022-12-13 12:28:37,278 INFO L137 encePairwiseOnDemand]: 358/361 looper letters, 43 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2022-12-13 12:28:37,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 47 transitions, 259 flow [2022-12-13 12:28:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2022-12-13 12:28:37,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45244690674053556 [2022-12-13 12:28:37,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2022-12-13 12:28:37,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2022-12-13 12:28:37,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:37,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2022-12-13 12:28:37,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:37,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:37,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:37,282 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 197 flow. Second operand 3 states and 490 transitions. [2022-12-13 12:28:37,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 47 transitions, 259 flow [2022-12-13 12:28:37,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 47 transitions, 233 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-12-13 12:28:37,284 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 147 flow [2022-12-13 12:28:37,284 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2022-12-13 12:28:37,284 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2022-12-13 12:28:37,284 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 147 flow [2022-12-13 12:28:37,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:37,285 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:37,285 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 12:28:37,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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)] Forceful destruction successful, exit code 0 [2022-12-13 12:28:37,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:37,485 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:28:37,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:37,486 INFO L85 PathProgramCache]: Analyzing trace with hash 699346053, now seen corresponding path program 1 times [2022-12-13 12:28:37,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:28:37,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782110104] [2022-12-13 12:28:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:37,486 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 12:28:37,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:28:37,487 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:37,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:37,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 12:28:37,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:28:37,611 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 12:28:37,612 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-12-13 12:28:37,713 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 12:28:37,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:28:37,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:28:37,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782110104] [2022-12-13 12:28:37,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782110104] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:37,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:37,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:37,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400545292] [2022-12-13 12:28:37,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:37,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:28:37,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:37,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:37,855 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 361 [2022-12-13 12:28:37,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:37,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:37,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 361 [2022-12-13 12:28:37,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:38,285 INFO L130 PetriNetUnfolder]: 3536/4594 cut-off events. [2022-12-13 12:28:38,285 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2022-12-13 12:28:38,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9325 conditions, 4594 events. 3536/4594 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 20601 event pairs, 1677 based on Foata normal form. 0/1559 useless extension candidates. Maximal degree in co-relation 9310. Up to 4534 conditions per place. [2022-12-13 12:28:38,303 INFO L137 encePairwiseOnDemand]: 358/361 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-12-13 12:28:38,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 45 transitions, 227 flow [2022-12-13 12:28:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2022-12-13 12:28:38,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45060018467220686 [2022-12-13 12:28:38,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2022-12-13 12:28:38,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2022-12-13 12:28:38,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:38,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2022-12-13 12:28:38,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:38,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:38,307 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:38,307 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 147 flow. Second operand 3 states and 488 transitions. [2022-12-13 12:28:38,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 45 transitions, 227 flow [2022-12-13 12:28:38,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 45 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:28:38,308 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 144 flow [2022-12-13 12:28:38,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2022-12-13 12:28:38,309 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2022-12-13 12:28:38,309 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 144 flow [2022-12-13 12:28:38,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:38,310 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:38,310 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 12:28:38,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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)] Forceful destruction successful, exit code 0 [2022-12-13 12:28:38,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:38,511 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:28:38,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:38,513 INFO L85 PathProgramCache]: Analyzing trace with hash 699346054, now seen corresponding path program 1 times [2022-12-13 12:28:38,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:28:38,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765793666] [2022-12-13 12:28:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:38,515 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 12:28:38,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:28:38,518 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:38,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:38,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:28:38,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:28:38,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:28:38,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:28:38,698 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-13 12:28:38,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-12-13 12:28:38,712 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 12:28:38,891 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 12:28:38,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:28:39,075 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 12:28:39,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:28:39,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765793666] [2022-12-13 12:28:39,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765793666] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:28:39,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:28:39,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 12:28:39,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861342590] [2022-12-13 12:28:39,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:28:39,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:28:39,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:28:39,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:28:39,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:28:39,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 361 [2022-12-13 12:28:39,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 144 flow. Second operand has 8 states, 8 states have (on average 142.25) internal successors, (1138), 8 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:39,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:39,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 361 [2022-12-13 12:28:39,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:40,718 INFO L130 PetriNetUnfolder]: 3352/4350 cut-off events. [2022-12-13 12:28:40,718 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2022-12-13 12:28:40,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8837 conditions, 4350 events. 3352/4350 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 19206 event pairs, 1588 based on Foata normal form. 0/1516 useless extension candidates. Maximal degree in co-relation 8821. Up to 2492 conditions per place. [2022-12-13 12:28:40,728 INFO L137 encePairwiseOnDemand]: 357/361 looper letters, 66 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2022-12-13 12:28:40,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 348 flow [2022-12-13 12:28:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:28:40,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:28:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 774 transitions. [2022-12-13 12:28:40,731 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42880886426592796 [2022-12-13 12:28:40,731 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 774 transitions. [2022-12-13 12:28:40,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 774 transitions. [2022-12-13 12:28:40,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:40,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 774 transitions. [2022-12-13 12:28:40,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.8) internal successors, (774), 5 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 12:28:40,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:40,734 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:40,734 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 144 flow. Second operand 5 states and 774 transitions. [2022-12-13 12:28:40,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 348 flow [2022-12-13 12:28:40,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:28:40,736 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 145 flow [2022-12-13 12:28:40,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2022-12-13 12:28:40,736 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2022-12-13 12:28:40,737 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 145 flow [2022-12-13 12:28:40,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.25) internal successors, (1138), 8 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:40,737 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:40,737 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 12:28:40,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:40,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:40,939 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:28:40,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:40,940 INFO L85 PathProgramCache]: Analyzing trace with hash 204110816, now seen corresponding path program 2 times [2022-12-13 12:28:40,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:28:40,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640325530] [2022-12-13 12:28:40,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:28:40,942 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 12:28:40,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:28:40,945 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:40,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:41,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:28:41,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:28:41,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:28:41,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:28:41,199 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:28:41,200 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 12:28:41,341 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 12:28:41,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:28:42,008 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 12:28:42,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:28:42,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640325530] [2022-12-13 12:28:42,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640325530] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:28:42,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:28:42,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 12:28:42,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206760449] [2022-12-13 12:28:42,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:28:42,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 12:28:42,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:28:42,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 12:28:42,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 12:28:45,154 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 361 [2022-12-13 12:28:45,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 145 flow. Second operand has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:45,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:45,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 361 [2022-12-13 12:28:45,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:50,802 INFO L130 PetriNetUnfolder]: 17051/21966 cut-off events. [2022-12-13 12:28:50,802 INFO L131 PetriNetUnfolder]: For 653/653 co-relation queries the response was YES. [2022-12-13 12:28:50,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44808 conditions, 21966 events. 17051/21966 cut-off events. For 653/653 co-relation queries the response was YES. Maximal size of possible extension queue 1091. Compared 112944 event pairs, 8098 based on Foata normal form. 6/7673 useless extension candidates. Maximal degree in co-relation 44791. Up to 2488 conditions per place. [2022-12-13 12:28:50,880 INFO L137 encePairwiseOnDemand]: 356/361 looper letters, 277 selfloop transitions, 13 changer transitions 0/293 dead transitions. [2022-12-13 12:28:50,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 293 transitions, 1365 flow [2022-12-13 12:28:50,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:28:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 12:28:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2048 transitions. [2022-12-13 12:28:50,886 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4727608494921514 [2022-12-13 12:28:50,886 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2048 transitions. [2022-12-13 12:28:50,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2048 transitions. [2022-12-13 12:28:50,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:50,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2048 transitions. [2022-12-13 12:28:50,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 170.66666666666666) internal successors, (2048), 12 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:50,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 361.0) internal successors, (4693), 13 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:50,899 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 361.0) internal successors, (4693), 13 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:50,899 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 145 flow. Second operand 12 states and 2048 transitions. [2022-12-13 12:28:50,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 293 transitions, 1365 flow [2022-12-13 12:28:50,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 293 transitions, 1360 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 12:28:50,905 INFO L231 Difference]: Finished difference. Result has 71 places, 51 transitions, 250 flow [2022-12-13 12:28:50,906 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=250, PETRI_PLACES=71, PETRI_TRANSITIONS=51} [2022-12-13 12:28:50,906 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2022-12-13 12:28:50,906 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 51 transitions, 250 flow [2022-12-13 12:28:50,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:50,907 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:50,907 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 12:28:50,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:51,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:51,109 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:28:51,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:51,110 INFO L85 PathProgramCache]: Analyzing trace with hash 204886170, now seen corresponding path program 1 times [2022-12-13 12:28:51,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:28:51,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44952986] [2022-12-13 12:28:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:51,112 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 12:28:51,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:28:51,115 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:51,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:51,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 12:28:51,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:28:51,246 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 12:28:51,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:28:51,410 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 25 treesize of output 21 [2022-12-13 12:28:51,473 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 12:28:51,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:28:51,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44952986] [2022-12-13 12:28:51,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44952986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:28:51,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:28:51,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 12:28:51,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542266973] [2022-12-13 12:28:51,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:28:51,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:28:51,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:28:51,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:28:51,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:28:53,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 361 [2022-12-13 12:28:53,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 51 transitions, 250 flow. Second operand has 10 states, 10 states have (on average 144.2) internal successors, (1442), 10 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:53,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:53,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 361 [2022-12-13 12:28:53,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:56,153 INFO L130 PetriNetUnfolder]: 25558/33665 cut-off events. [2022-12-13 12:28:56,154 INFO L131 PetriNetUnfolder]: For 1428/1428 co-relation queries the response was YES. [2022-12-13 12:28:56,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69048 conditions, 33665 events. 25558/33665 cut-off events. For 1428/1428 co-relation queries the response was YES. Maximal size of possible extension queue 1635. Compared 192810 event pairs, 6653 based on Foata normal form. 0/12915 useless extension candidates. Maximal degree in co-relation 69024. Up to 17952 conditions per place. [2022-12-13 12:28:56,310 INFO L137 encePairwiseOnDemand]: 354/361 looper letters, 118 selfloop transitions, 14 changer transitions 0/134 dead transitions. [2022-12-13 12:28:56,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 134 transitions, 704 flow [2022-12-13 12:28:56,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:28:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 12:28:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1409 transitions. [2022-12-13 12:28:56,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4336718990458603 [2022-12-13 12:28:56,315 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1409 transitions. [2022-12-13 12:28:56,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1409 transitions. [2022-12-13 12:28:56,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:56,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1409 transitions. [2022-12-13 12:28:56,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 156.55555555555554) internal successors, (1409), 9 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:56,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:56,324 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:56,324 INFO L175 Difference]: Start difference. First operand has 71 places, 51 transitions, 250 flow. Second operand 9 states and 1409 transitions. [2022-12-13 12:28:56,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 134 transitions, 704 flow [2022-12-13 12:28:56,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 134 transitions, 679 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-12-13 12:28:56,349 INFO L231 Difference]: Finished difference. Result has 77 places, 55 transitions, 279 flow [2022-12-13 12:28:56,349 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=279, PETRI_PLACES=77, PETRI_TRANSITIONS=55} [2022-12-13 12:28:56,350 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2022-12-13 12:28:56,350 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 55 transitions, 279 flow [2022-12-13 12:28:56,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 144.2) internal successors, (1442), 10 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:56,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:56,350 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 12:28:56,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-13 12:28:56,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:56,552 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:28:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:56,553 INFO L85 PathProgramCache]: Analyzing trace with hash 204886169, now seen corresponding path program 1 times [2022-12-13 12:28:56,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:28:56,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911766125] [2022-12-13 12:28:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:56,555 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 12:28:56,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:28:56,558 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:56,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:56,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 12:28:56,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:28:56,722 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 12:28:56,722 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 12:28:56,740 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 12:28:56,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:28:56,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:28:56,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911766125] [2022-12-13 12:28:56,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911766125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:56,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:56,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:28:56,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237626000] [2022-12-13 12:28:56,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:56,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:28:56,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:28:56,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:28:56,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:28:56,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 361 [2022-12-13 12:28:56,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 55 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:56,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:56,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 361 [2022-12-13 12:28:56,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:58,233 INFO L130 PetriNetUnfolder]: 10287/14113 cut-off events. [2022-12-13 12:28:58,233 INFO L131 PetriNetUnfolder]: For 3009/3525 co-relation queries the response was YES. [2022-12-13 12:28:58,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32046 conditions, 14113 events. 10287/14113 cut-off events. For 3009/3525 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 80168 event pairs, 5578 based on Foata normal form. 516/7924 useless extension candidates. Maximal degree in co-relation 32019. Up to 13875 conditions per place. [2022-12-13 12:28:58,291 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 40 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2022-12-13 12:28:58,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 52 transitions, 369 flow [2022-12-13 12:28:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:28:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:28:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 614 transitions. [2022-12-13 12:28:58,293 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.425207756232687 [2022-12-13 12:28:58,294 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 614 transitions. [2022-12-13 12:28:58,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 614 transitions. [2022-12-13 12:28:58,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:58,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 614 transitions. [2022-12-13 12:28:58,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:58,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 361.0) internal successors, (1805), 5 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:58,297 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 361.0) internal successors, (1805), 5 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:58,297 INFO L175 Difference]: Start difference. First operand has 77 places, 55 transitions, 279 flow. Second operand 4 states and 614 transitions. [2022-12-13 12:28:58,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 52 transitions, 369 flow [2022-12-13 12:28:58,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 52 transitions, 352 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-12-13 12:28:58,302 INFO L231 Difference]: Finished difference. Result has 73 places, 52 transitions, 272 flow [2022-12-13 12:28:58,302 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=73, PETRI_TRANSITIONS=52} [2022-12-13 12:28:58,302 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2022-12-13 12:28:58,303 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 52 transitions, 272 flow [2022-12-13 12:28:58,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:58,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:58,303 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 12:28:58,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:58,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:58,504 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:28:58,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:58,506 INFO L85 PathProgramCache]: Analyzing trace with hash 204110973, now seen corresponding path program 2 times [2022-12-13 12:28:58,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:28:58,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683400984] [2022-12-13 12:28:58,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:28:58,508 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 12:28:58,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:28:58,511 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:58,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:28:58,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:28:58,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:28:58,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 12:28:58,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:28:58,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:28:58,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:28:58,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:28:58,701 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-12-13 12:28:58,701 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 3 case distinctions, treesize of input 17 treesize of output 35 [2022-12-13 12:28:58,721 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 12:28:58,721 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 12:28:58,844 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 12:28:58,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:28:58,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:28:58,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683400984] [2022-12-13 12:28:58,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683400984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:58,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:58,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:58,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393643274] [2022-12-13 12:28:58,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:58,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:58,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:28:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:58,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:29:01,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:02,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:29:02,575 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 361 [2022-12-13 12:29:02,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 52 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:02,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:29:02,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 361 [2022-12-13 12:29:02,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:29:03,868 INFO L130 PetriNetUnfolder]: 10286/14106 cut-off events. [2022-12-13 12:29:03,869 INFO L131 PetriNetUnfolder]: For 3032/3548 co-relation queries the response was YES. [2022-12-13 12:29:03,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32005 conditions, 14106 events. 10286/14106 cut-off events. For 3032/3548 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 80001 event pairs, 5578 based on Foata normal form. 516/7924 useless extension candidates. Maximal degree in co-relation 31979. Up to 13881 conditions per place. [2022-12-13 12:29:03,910 INFO L137 encePairwiseOnDemand]: 359/361 looper letters, 45 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2022-12-13 12:29:03,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 50 transitions, 338 flow [2022-12-13 12:29:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:29:03,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:29:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2022-12-13 12:29:03,912 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44136657433056325 [2022-12-13 12:29:03,912 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2022-12-13 12:29:03,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2022-12-13 12:29:03,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:29:03,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2022-12-13 12:29:03,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:03,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:03,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:03,914 INFO L175 Difference]: Start difference. First operand has 73 places, 52 transitions, 272 flow. Second operand 3 states and 478 transitions. [2022-12-13 12:29:03,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 50 transitions, 338 flow [2022-12-13 12:29:03,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 50 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:29:03,919 INFO L231 Difference]: Finished difference. Result has 71 places, 50 transitions, 241 flow [2022-12-13 12:29:03,919 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=69, 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=241, PETRI_PLACES=71, PETRI_TRANSITIONS=50} [2022-12-13 12:29:03,919 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2022-12-13 12:29:03,919 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 50 transitions, 241 flow [2022-12-13 12:29:03,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:03,920 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:29:03,920 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:29:03,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:04,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:04,121 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:29:04,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:29:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2056507010, now seen corresponding path program 1 times [2022-12-13 12:29:04,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:29:04,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511669327] [2022-12-13 12:29:04,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:29:04,123 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 12:29:04,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:29:04,126 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:04,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:29:04,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 12:29:04,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:29:04,357 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:29:04,357 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 12:29:04,479 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 12:29:04,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:29:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:29:04,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:29:04,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511669327] [2022-12-13 12:29:04,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511669327] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:29:04,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:29:04,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 12:29:04,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688514252] [2022-12-13 12:29:04,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:29:04,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:29:04,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:29:04,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:29:04,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:29:06,963 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 361 [2022-12-13 12:29:06,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 50 transitions, 241 flow. Second operand has 10 states, 10 states have (on average 144.4) internal successors, (1444), 10 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:06,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:29:06,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 361 [2022-12-13 12:29:06,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:29:10,270 INFO L130 PetriNetUnfolder]: 19815/25938 cut-off events. [2022-12-13 12:29:10,270 INFO L131 PetriNetUnfolder]: For 4196/4196 co-relation queries the response was YES. [2022-12-13 12:29:10,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60714 conditions, 25938 events. 19815/25938 cut-off events. For 4196/4196 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 147184 event pairs, 2627 based on Foata normal form. 578/15215 useless extension candidates. Maximal degree in co-relation 60688. Up to 7601 conditions per place. [2022-12-13 12:29:10,372 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 103 selfloop transitions, 15 changer transitions 0/120 dead transitions. [2022-12-13 12:29:10,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 120 transitions, 648 flow [2022-12-13 12:29:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:29:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:29:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1250 transitions. [2022-12-13 12:29:10,376 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4328254847645429 [2022-12-13 12:29:10,376 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1250 transitions. [2022-12-13 12:29:10,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1250 transitions. [2022-12-13 12:29:10,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:29:10,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1250 transitions. [2022-12-13 12:29:10,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 156.25) internal successors, (1250), 8 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:10,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 361.0) internal successors, (3249), 9 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:10,381 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 361.0) internal successors, (3249), 9 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:10,381 INFO L175 Difference]: Start difference. First operand has 71 places, 50 transitions, 241 flow. Second operand 8 states and 1250 transitions. [2022-12-13 12:29:10,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 120 transitions, 648 flow [2022-12-13 12:29:10,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 120 transitions, 643 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 12:29:10,390 INFO L231 Difference]: Finished difference. Result has 82 places, 55 transitions, 325 flow [2022-12-13 12:29:10,390 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=325, PETRI_PLACES=82, PETRI_TRANSITIONS=55} [2022-12-13 12:29:10,391 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2022-12-13 12:29:10,391 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 55 transitions, 325 flow [2022-12-13 12:29:10,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 144.4) internal successors, (1444), 10 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:10,391 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:29:10,392 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:29:10,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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)] Forceful destruction successful, exit code 0 [2022-12-13 12:29:10,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:10,593 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:29:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:29:10,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2056674494, now seen corresponding path program 1 times [2022-12-13 12:29:10,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:29:10,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556037524] [2022-12-13 12:29:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:29:10,595 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 12:29:10,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:29:10,598 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:10,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:29:10,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:29:10,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:29:10,793 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 12:29:10,793 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 29 [2022-12-13 12:29:10,814 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 12:29:10,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:29:10,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:29:10,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556037524] [2022-12-13 12:29:10,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556037524] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:29:10,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:29:10,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:29:10,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969357782] [2022-12-13 12:29:10,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:29:10,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:29:10,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:29:10,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:29:10,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:29:10,896 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 361 [2022-12-13 12:29:10,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 55 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:10,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:29:10,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 361 [2022-12-13 12:29:10,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:29:12,782 INFO L130 PetriNetUnfolder]: 16096/21290 cut-off events. [2022-12-13 12:29:12,782 INFO L131 PetriNetUnfolder]: For 35299/37219 co-relation queries the response was YES. [2022-12-13 12:29:12,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60646 conditions, 21290 events. 16096/21290 cut-off events. For 35299/37219 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 115894 event pairs, 8468 based on Foata normal form. 1920/14602 useless extension candidates. Maximal degree in co-relation 60614. Up to 21047 conditions per place. [2022-12-13 12:29:12,875 INFO L137 encePairwiseOnDemand]: 358/361 looper letters, 48 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-12-13 12:29:12,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 53 transitions, 419 flow [2022-12-13 12:29:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:29:12,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:29:12,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2022-12-13 12:29:12,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43490304709141275 [2022-12-13 12:29:12,878 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2022-12-13 12:29:12,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2022-12-13 12:29:12,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:29:12,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2022-12-13 12:29:12,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:12,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:12,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:12,880 INFO L175 Difference]: Start difference. First operand has 82 places, 55 transitions, 325 flow. Second operand 3 states and 471 transitions. [2022-12-13 12:29:12,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 53 transitions, 419 flow [2022-12-13 12:29:12,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 53 transitions, 394 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-12-13 12:29:12,900 INFO L231 Difference]: Finished difference. Result has 79 places, 53 transitions, 298 flow [2022-12-13 12:29:12,900 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=79, PETRI_TRANSITIONS=53} [2022-12-13 12:29:12,900 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2022-12-13 12:29:12,900 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 53 transitions, 298 flow [2022-12-13 12:29:12,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:12,900 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:29:12,900 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:29:12,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:13,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:13,101 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:29:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:29:13,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2056674496, now seen corresponding path program 1 times [2022-12-13 12:29:13,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:29:13,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150970227] [2022-12-13 12:29:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:29:13,102 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 12:29:13,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:29:13,103 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:13,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:29:13,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 12:29:13,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:29:13,327 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:29:13,327 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 12:29:13,504 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 12:29:13,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:29:13,779 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 12:29:13,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:29:13,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150970227] [2022-12-13 12:29:13,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150970227] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:29:13,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:29:13,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 12:29:13,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740769260] [2022-12-13 12:29:13,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:29:13,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:29:13,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:29:13,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:29:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:29:14,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 361 [2022-12-13 12:29:14,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 53 transitions, 298 flow. Second operand has 8 states, 8 states have (on average 142.75) internal successors, (1142), 8 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:14,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:29:14,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 361 [2022-12-13 12:29:14,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:29:17,089 INFO L130 PetriNetUnfolder]: 15214/20048 cut-off events. [2022-12-13 12:29:17,089 INFO L131 PetriNetUnfolder]: For 25530/27338 co-relation queries the response was YES. [2022-12-13 12:29:17,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53693 conditions, 20048 events. 15214/20048 cut-off events. For 25530/27338 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 106891 event pairs, 7964 based on Foata normal form. 1808/14006 useless extension candidates. Maximal degree in co-relation 53661. Up to 18180 conditions per place. [2022-12-13 12:29:17,179 INFO L137 encePairwiseOnDemand]: 357/361 looper letters, 70 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2022-12-13 12:29:17,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 77 transitions, 538 flow [2022-12-13 12:29:17,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:29:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:29:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 759 transitions. [2022-12-13 12:29:17,181 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42049861495844876 [2022-12-13 12:29:17,182 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 759 transitions. [2022-12-13 12:29:17,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 759 transitions. [2022-12-13 12:29:17,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:29:17,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 759 transitions. [2022-12-13 12:29:17,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.8) internal successors, (759), 5 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:17,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:17,184 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:17,184 INFO L175 Difference]: Start difference. First operand has 79 places, 53 transitions, 298 flow. Second operand 5 states and 759 transitions. [2022-12-13 12:29:17,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 77 transitions, 538 flow [2022-12-13 12:29:17,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 537 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:29:17,200 INFO L231 Difference]: Finished difference. Result has 80 places, 51 transitions, 299 flow [2022-12-13 12:29:17,200 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=80, PETRI_TRANSITIONS=51} [2022-12-13 12:29:17,201 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2022-12-13 12:29:17,201 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 51 transitions, 299 flow [2022-12-13 12:29:17,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.75) internal successors, (1142), 8 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:17,201 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:29:17,201 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:29:17,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:17,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:17,402 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:29:17,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:29:17,403 INFO L85 PathProgramCache]: Analyzing trace with hash -667605200, now seen corresponding path program 1 times [2022-12-13 12:29:17,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:29:17,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455394177] [2022-12-13 12:29:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:29:17,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 12:29:17,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:29:17,408 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:17,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:29:17,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 12:29:17,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:29:17,553 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 12:29:17,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:29:17,730 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 25 treesize of output 21 [2022-12-13 12:29:17,800 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 12:29:17,800 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:29:17,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455394177] [2022-12-13 12:29:17,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455394177] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:29:17,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:29:17,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 12:29:17,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713014774] [2022-12-13 12:29:17,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:29:17,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:29:17,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:29:17,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:29:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:29:19,814 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 361 [2022-12-13 12:29:19,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 51 transitions, 299 flow. Second operand has 10 states, 10 states have (on average 144.6) internal successors, (1446), 10 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:19,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:29:19,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 361 [2022-12-13 12:29:19,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:29:23,407 INFO L130 PetriNetUnfolder]: 20957/28211 cut-off events. [2022-12-13 12:29:23,407 INFO L131 PetriNetUnfolder]: For 42071/44963 co-relation queries the response was YES. [2022-12-13 12:29:23,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77604 conditions, 28211 events. 20957/28211 cut-off events. For 42071/44963 co-relation queries the response was YES. Maximal size of possible extension queue 1357. Compared 165031 event pairs, 8375 based on Foata normal form. 2892/21909 useless extension candidates. Maximal degree in co-relation 77571. Up to 16945 conditions per place. [2022-12-13 12:29:23,569 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 110 selfloop transitions, 12 changer transitions 0/125 dead transitions. [2022-12-13 12:29:23,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 125 transitions, 835 flow [2022-12-13 12:29:23,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:29:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 12:29:23,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1376 transitions. [2022-12-13 12:29:23,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42351492767005233 [2022-12-13 12:29:23,573 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1376 transitions. [2022-12-13 12:29:23,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1376 transitions. [2022-12-13 12:29:23,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:29:23,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1376 transitions. [2022-12-13 12:29:23,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.88888888888889) internal successors, (1376), 9 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:23,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:23,579 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:23,579 INFO L175 Difference]: Start difference. First operand has 80 places, 51 transitions, 299 flow. Second operand 9 states and 1376 transitions. [2022-12-13 12:29:23,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 125 transitions, 835 flow [2022-12-13 12:29:23,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 830 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 12:29:23,608 INFO L231 Difference]: Finished difference. Result has 87 places, 54 transitions, 336 flow [2022-12-13 12:29:23,609 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=336, PETRI_PLACES=87, PETRI_TRANSITIONS=54} [2022-12-13 12:29:23,609 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2022-12-13 12:29:23,609 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 54 transitions, 336 flow [2022-12-13 12:29:23,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 144.6) internal successors, (1446), 10 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:23,609 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:29:23,609 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:29:23,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:23,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:23,811 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:29:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:29:23,812 INFO L85 PathProgramCache]: Analyzing trace with hash 779077708, now seen corresponding path program 1 times [2022-12-13 12:29:23,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:29:23,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428314479] [2022-12-13 12:29:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:29:23,814 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 12:29:23,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:29:23,817 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:23,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:29:23,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 12:29:23,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:29:24,005 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:29:24,005 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 12:29:24,205 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 12:29:24,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:29:24,585 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 12:29:24,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:29:24,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428314479] [2022-12-13 12:29:24,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428314479] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:29:24,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:29:24,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 12:29:24,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779672888] [2022-12-13 12:29:24,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:29:24,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:29:24,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:29:24,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:29:24,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:29:27,146 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 361 [2022-12-13 12:29:27,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 54 transitions, 336 flow. Second operand has 10 states, 10 states have (on average 142.8) internal successors, (1428), 10 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:27,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:29:27,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 361 [2022-12-13 12:29:27,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:29:33,685 INFO L130 PetriNetUnfolder]: 40481/53695 cut-off events. [2022-12-13 12:29:33,685 INFO L131 PetriNetUnfolder]: For 84620/89952 co-relation queries the response was YES. [2022-12-13 12:29:33,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160791 conditions, 53695 events. 40481/53695 cut-off events. For 84620/89952 co-relation queries the response was YES. Maximal size of possible extension queue 2301. Compared 332843 event pairs, 6095 based on Foata normal form. 5332/46703 useless extension candidates. Maximal degree in co-relation 160756. Up to 13881 conditions per place. [2022-12-13 12:29:34,005 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 150 selfloop transitions, 15 changer transitions 0/168 dead transitions. [2022-12-13 12:29:34,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 168 transitions, 1172 flow [2022-12-13 12:29:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:29:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 12:29:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1379 transitions. [2022-12-13 12:29:34,009 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4244382887042167 [2022-12-13 12:29:34,009 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1379 transitions. [2022-12-13 12:29:34,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1379 transitions. [2022-12-13 12:29:34,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:29:34,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1379 transitions. [2022-12-13 12:29:34,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 153.22222222222223) internal successors, (1379), 9 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:34,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:34,014 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:34,014 INFO L175 Difference]: Start difference. First operand has 87 places, 54 transitions, 336 flow. Second operand 9 states and 1379 transitions. [2022-12-13 12:29:34,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 168 transitions, 1172 flow [2022-12-13 12:29:34,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 168 transitions, 1161 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 12:29:34,066 INFO L231 Difference]: Finished difference. Result has 95 places, 59 transitions, 407 flow [2022-12-13 12:29:34,066 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=407, PETRI_PLACES=95, PETRI_TRANSITIONS=59} [2022-12-13 12:29:34,066 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2022-12-13 12:29:34,067 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 59 transitions, 407 flow [2022-12-13 12:29:34,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.8) internal successors, (1428), 10 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:34,067 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:29:34,067 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 12:29:34,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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)] Forceful destruction successful, exit code 0 [2022-12-13 12:29:34,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:34,268 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:29:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:29:34,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1989839514, now seen corresponding path program 2 times [2022-12-13 12:29:34,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:29:34,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585318900] [2022-12-13 12:29:34,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:29:34,271 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 12:29:34,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:29:34,274 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:34,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:29:34,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:29:34,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:29:34,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:29:34,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:29:34,637 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:29:34,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 12:29:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:29:34,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:29:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:29:35,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:29:35,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585318900] [2022-12-13 12:29:35,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585318900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:29:35,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:29:35,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 12:29:35,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691947466] [2022-12-13 12:29:35,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:29:35,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 12:29:35,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:29:35,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 12:29:35,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-12-13 12:29:45,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 361 [2022-12-13 12:29:45,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 59 transitions, 407 flow. Second operand has 18 states, 18 states have (on average 138.11111111111111) internal successors, (2486), 18 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:45,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:29:45,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 361 [2022-12-13 12:29:45,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:30:01,378 INFO L130 PetriNetUnfolder]: 41529/55577 cut-off events. [2022-12-13 12:30:01,378 INFO L131 PetriNetUnfolder]: For 137019/140733 co-relation queries the response was YES. [2022-12-13 12:30:01,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191122 conditions, 55577 events. 41529/55577 cut-off events. For 137019/140733 co-relation queries the response was YES. Maximal size of possible extension queue 2497. Compared 349685 event pairs, 13696 based on Foata normal form. 4100/47920 useless extension candidates. Maximal degree in co-relation 191083. Up to 23458 conditions per place. [2022-12-13 12:30:01,824 INFO L137 encePairwiseOnDemand]: 353/361 looper letters, 308 selfloop transitions, 24 changer transitions 0/335 dead transitions. [2022-12-13 12:30:01,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 335 transitions, 2493 flow [2022-12-13 12:30:01,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 12:30:01,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 12:30:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2840 transitions. [2022-12-13 12:30:01,831 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4140545268989649 [2022-12-13 12:30:01,831 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2840 transitions. [2022-12-13 12:30:01,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2840 transitions. [2022-12-13 12:30:01,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:30:01,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2840 transitions. [2022-12-13 12:30:01,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 149.47368421052633) internal successors, (2840), 19 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:01,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 361.0) internal successors, (7220), 20 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:01,840 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 361.0) internal successors, (7220), 20 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:01,840 INFO L175 Difference]: Start difference. First operand has 95 places, 59 transitions, 407 flow. Second operand 19 states and 2840 transitions. [2022-12-13 12:30:01,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 335 transitions, 2493 flow [2022-12-13 12:30:02,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 335 transitions, 2274 flow, removed 98 selfloop flow, removed 3 redundant places. [2022-12-13 12:30:02,098 INFO L231 Difference]: Finished difference. Result has 117 places, 71 transitions, 550 flow [2022-12-13 12:30:02,098 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=550, PETRI_PLACES=117, PETRI_TRANSITIONS=71} [2022-12-13 12:30:02,098 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 60 predicate places. [2022-12-13 12:30:02,098 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 71 transitions, 550 flow [2022-12-13 12:30:02,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 138.11111111111111) internal successors, (2486), 18 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:02,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:30:02,099 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:30:02,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:02,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:02,299 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:30:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:30:02,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1613047394, now seen corresponding path program 1 times [2022-12-13 12:30:02,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:30:02,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360471477] [2022-12-13 12:30:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:30:02,302 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 12:30:02,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:30:02,304 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:02,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:30:02,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 12:30:02,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:30:02,491 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:30:02,492 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 12:30:02,715 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 12:30:02,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:30:03,366 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 12:30:03,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:30:03,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360471477] [2022-12-13 12:30:03,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360471477] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:30:03,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:30:03,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 12:30:03,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859957079] [2022-12-13 12:30:03,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:30:03,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:30:03,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:30:03,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:30:03,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:30:08,398 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 361 [2022-12-13 12:30:08,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 71 transitions, 550 flow. Second operand has 10 states, 10 states have (on average 138.0) internal successors, (1380), 10 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:08,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:30:08,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 361 [2022-12-13 12:30:08,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:30:18,767 INFO L130 PetriNetUnfolder]: 37931/52665 cut-off events. [2022-12-13 12:30:18,767 INFO L131 PetriNetUnfolder]: For 194240/203426 co-relation queries the response was YES. [2022-12-13 12:30:18,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198184 conditions, 52665 events. 37931/52665 cut-off events. For 194240/203426 co-relation queries the response was YES. Maximal size of possible extension queue 1949. Compared 334754 event pairs, 24943 based on Foata normal form. 9186/55452 useless extension candidates. Maximal degree in co-relation 198138. Up to 30421 conditions per place. [2022-12-13 12:30:19,158 INFO L137 encePairwiseOnDemand]: 353/361 looper letters, 151 selfloop transitions, 15 changer transitions 0/171 dead transitions. [2022-12-13 12:30:19,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 171 transitions, 1400 flow [2022-12-13 12:30:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 12:30:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 12:30:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1604 transitions. [2022-12-13 12:30:19,162 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40392848149080834 [2022-12-13 12:30:19,162 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1604 transitions. [2022-12-13 12:30:19,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1604 transitions. [2022-12-13 12:30:19,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:30:19,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1604 transitions. [2022-12-13 12:30:19,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 145.8181818181818) internal successors, (1604), 11 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:19,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 361.0) internal successors, (4332), 12 states have internal predecessors, (4332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:19,167 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 361.0) internal successors, (4332), 12 states have internal predecessors, (4332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:19,167 INFO L175 Difference]: Start difference. First operand has 117 places, 71 transitions, 550 flow. Second operand 11 states and 1604 transitions. [2022-12-13 12:30:19,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 171 transitions, 1400 flow [2022-12-13 12:30:19,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 171 transitions, 1317 flow, removed 29 selfloop flow, removed 8 redundant places. [2022-12-13 12:30:19,453 INFO L231 Difference]: Finished difference. Result has 121 places, 75 transitions, 549 flow [2022-12-13 12:30:19,454 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=549, PETRI_PLACES=121, PETRI_TRANSITIONS=75} [2022-12-13 12:30:19,454 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 64 predicate places. [2022-12-13 12:30:19,454 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 75 transitions, 549 flow [2022-12-13 12:30:19,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.0) internal successors, (1380), 10 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:19,454 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:30:19,454 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:30:19,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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)] Forceful destruction successful, exit code 0 [2022-12-13 12:30:19,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:19,655 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:30:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:30:19,656 INFO L85 PathProgramCache]: Analyzing trace with hash 723564119, now seen corresponding path program 1 times [2022-12-13 12:30:19,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:30:19,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121410659] [2022-12-13 12:30:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:30:19,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 12:30:19,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:30:19,660 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:19,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:30:19,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 12:30:19,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:30:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:30:19,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:30:19,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:30:19,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121410659] [2022-12-13 12:30:19,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121410659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:30:19,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:30:19,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:30:19,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294124828] [2022-12-13 12:30:19,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:30:19,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:30:19,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:30:19,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:30:19,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:30:19,960 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 361 [2022-12-13 12:30:19,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 75 transitions, 549 flow. Second operand has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:19,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:30:19,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 361 [2022-12-13 12:30:19,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:30:24,051 INFO L130 PetriNetUnfolder]: 23433/32220 cut-off events. [2022-12-13 12:30:24,051 INFO L131 PetriNetUnfolder]: For 103611/109288 co-relation queries the response was YES. [2022-12-13 12:30:24,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129657 conditions, 32220 events. 23433/32220 cut-off events. For 103611/109288 co-relation queries the response was YES. Maximal size of possible extension queue 1471. Compared 199777 event pairs, 15542 based on Foata normal form. 8111/37078 useless extension candidates. Maximal degree in co-relation 129610. Up to 32145 conditions per place. [2022-12-13 12:30:24,296 INFO L137 encePairwiseOnDemand]: 359/361 looper letters, 65 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2022-12-13 12:30:24,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 74 transitions, 677 flow [2022-12-13 12:30:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:30:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:30:24,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2022-12-13 12:30:24,298 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43674976915974145 [2022-12-13 12:30:24,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2022-12-13 12:30:24,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2022-12-13 12:30:24,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:30:24,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2022-12-13 12:30:24,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:24,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:24,301 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:24,301 INFO L175 Difference]: Start difference. First operand has 121 places, 75 transitions, 549 flow. Second operand 3 states and 473 transitions. [2022-12-13 12:30:24,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 74 transitions, 677 flow [2022-12-13 12:30:24,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 74 transitions, 656 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-12-13 12:30:24,681 INFO L231 Difference]: Finished difference. Result has 116 places, 74 transitions, 526 flow [2022-12-13 12:30:24,682 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=526, PETRI_PLACES=116, PETRI_TRANSITIONS=74} [2022-12-13 12:30:24,682 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2022-12-13 12:30:24,682 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 74 transitions, 526 flow [2022-12-13 12:30:24,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:24,682 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:30:24,683 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:30:24,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:24,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:24,884 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:30:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:30:24,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1535142488, now seen corresponding path program 1 times [2022-12-13 12:30:24,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:30:24,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137147200] [2022-12-13 12:30:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:30:24,887 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 12:30:24,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:30:24,890 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:24,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:30:24,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 12:30:25,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:30:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:30:25,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:30:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:30:25,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:30:25,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137147200] [2022-12-13 12:30:25,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137147200] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:30:25,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:30:25,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 12:30:25,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712040483] [2022-12-13 12:30:25,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:30:25,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 12:30:25,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:30:25,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 12:30:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-13 12:30:26,570 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 361 [2022-12-13 12:30:26,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 74 transitions, 526 flow. Second operand has 12 states, 12 states have (on average 144.83333333333334) internal successors, (1738), 12 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:26,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:30:26,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 361 [2022-12-13 12:30:26,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:30:31,482 INFO L130 PetriNetUnfolder]: 21755/30859 cut-off events. [2022-12-13 12:30:31,482 INFO L131 PetriNetUnfolder]: For 113607/119158 co-relation queries the response was YES. [2022-12-13 12:30:31,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123848 conditions, 30859 events. 21755/30859 cut-off events. For 113607/119158 co-relation queries the response was YES. Maximal size of possible extension queue 1131. Compared 191750 event pairs, 11742 based on Foata normal form. 5639/34854 useless extension candidates. Maximal degree in co-relation 123802. Up to 22588 conditions per place. [2022-12-13 12:30:31,725 INFO L137 encePairwiseOnDemand]: 353/361 looper letters, 143 selfloop transitions, 12 changer transitions 0/160 dead transitions. [2022-12-13 12:30:31,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 160 transitions, 1322 flow [2022-12-13 12:30:31,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:30:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:30:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1512 transitions. [2022-12-13 12:30:31,729 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4188365650969529 [2022-12-13 12:30:31,729 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1512 transitions. [2022-12-13 12:30:31,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1512 transitions. [2022-12-13 12:30:31,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:30:31,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1512 transitions. [2022-12-13 12:30:31,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 151.2) internal successors, (1512), 10 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:31,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 361.0) internal successors, (3971), 11 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:31,735 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 361.0) internal successors, (3971), 11 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:31,735 INFO L175 Difference]: Start difference. First operand has 116 places, 74 transitions, 526 flow. Second operand 10 states and 1512 transitions. [2022-12-13 12:30:31,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 160 transitions, 1322 flow [2022-12-13 12:30:32,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1321 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:30:32,064 INFO L231 Difference]: Finished difference. Result has 126 places, 75 transitions, 565 flow [2022-12-13 12:30:32,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=565, PETRI_PLACES=126, PETRI_TRANSITIONS=75} [2022-12-13 12:30:32,065 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 69 predicate places. [2022-12-13 12:30:32,065 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 75 transitions, 565 flow [2022-12-13 12:30:32,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 144.83333333333334) internal successors, (1738), 12 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:32,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:30:32,065 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-12-13 12:30:32,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:32,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:32,266 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:30:32,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:30:32,268 INFO L85 PathProgramCache]: Analyzing trace with hash -419355393, now seen corresponding path program 3 times [2022-12-13 12:30:32,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:30:32,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446412701] [2022-12-13 12:30:32,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:30:32,270 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 12:30:32,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:30:32,273 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:32,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:32,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 12:30:32,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:30:32,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 12:30:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:30:32,561 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:30:32,562 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 12:30:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:30:32,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:30:32,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-13 12:30:32,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-13 12:30:32,904 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 12:30:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:30:33,623 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:30:33,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446412701] [2022-12-13 12:30:33,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446412701] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:30:33,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:30:33,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-12-13 12:30:33,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676426156] [2022-12-13 12:30:33,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:30:33,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 12:30:33,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:30:33,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 12:30:33,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-13 12:30:39,586 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 361 [2022-12-13 12:30:39,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 75 transitions, 565 flow. Second operand has 16 states, 16 states have (on average 141.25) internal successors, (2260), 16 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:39,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:30:39,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 361 [2022-12-13 12:30:39,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:30:48,555 INFO L130 PetriNetUnfolder]: 27087/37660 cut-off events. [2022-12-13 12:30:48,555 INFO L131 PetriNetUnfolder]: For 135031/138410 co-relation queries the response was YES. [2022-12-13 12:30:48,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164749 conditions, 37660 events. 27087/37660 cut-off events. For 135031/138410 co-relation queries the response was YES. Maximal size of possible extension queue 1660. Compared 241781 event pairs, 14815 based on Foata normal form. 3501/37532 useless extension candidates. Maximal degree in co-relation 164700. Up to 30241 conditions per place. [2022-12-13 12:30:48,816 INFO L137 encePairwiseOnDemand]: 354/361 looper letters, 217 selfloop transitions, 13 changer transitions 0/235 dead transitions. [2022-12-13 12:30:48,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 235 transitions, 1849 flow [2022-12-13 12:30:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:30:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 12:30:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2105 transitions. [2022-12-13 12:30:48,820 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4165017807677087 [2022-12-13 12:30:48,820 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2105 transitions. [2022-12-13 12:30:48,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2105 transitions. [2022-12-13 12:30:48,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:30:48,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2105 transitions. [2022-12-13 12:30:48,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 150.35714285714286) internal successors, (2105), 14 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:48,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 361.0) internal successors, (5415), 15 states have internal predecessors, (5415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:48,826 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 361.0) internal successors, (5415), 15 states have internal predecessors, (5415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:48,826 INFO L175 Difference]: Start difference. First operand has 126 places, 75 transitions, 565 flow. Second operand 14 states and 2105 transitions. [2022-12-13 12:30:48,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 235 transitions, 1849 flow [2022-12-13 12:30:49,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 235 transitions, 1828 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 12:30:49,242 INFO L231 Difference]: Finished difference. Result has 138 places, 78 transitions, 619 flow [2022-12-13 12:30:49,242 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=619, PETRI_PLACES=138, PETRI_TRANSITIONS=78} [2022-12-13 12:30:49,242 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 81 predicate places. [2022-12-13 12:30:49,242 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 78 transitions, 619 flow [2022-12-13 12:30:49,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 141.25) internal successors, (2260), 16 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:49,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:30:49,242 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:30:49,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:49,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:49,443 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:30:49,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:30:49,445 INFO L85 PathProgramCache]: Analyzing trace with hash -496857552, now seen corresponding path program 2 times [2022-12-13 12:30:49,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:30:49,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511592343] [2022-12-13 12:30:49,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:30:49,447 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 12:30:49,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:30:49,450 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:49,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:30:49,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:30:49,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:30:49,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 12:30:49,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:30:49,756 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:30:49,756 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 12:30:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:30:50,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:30:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:30:51,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:30:51,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511592343] [2022-12-13 12:30:51,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511592343] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:30:51,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:30:51,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 12:30:51,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792199252] [2022-12-13 12:30:51,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:30:51,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 12:30:51,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:30:51,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 12:30:51,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-12-13 12:31:02,442 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 361 [2022-12-13 12:31:02,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 78 transitions, 619 flow. Second operand has 18 states, 18 states have (on average 136.33333333333334) internal successors, (2454), 18 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:02,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:31:02,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 361 [2022-12-13 12:31:02,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:31:20,365 INFO L130 PetriNetUnfolder]: 27830/38621 cut-off events. [2022-12-13 12:31:20,365 INFO L131 PetriNetUnfolder]: For 159174/163656 co-relation queries the response was YES. [2022-12-13 12:31:20,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171215 conditions, 38621 events. 27830/38621 cut-off events. For 159174/163656 co-relation queries the response was YES. Maximal size of possible extension queue 1734. Compared 252257 event pairs, 8766 based on Foata normal form. 4764/39716 useless extension candidates. Maximal degree in co-relation 171162. Up to 15658 conditions per place. [2022-12-13 12:31:20,678 INFO L137 encePairwiseOnDemand]: 353/361 looper letters, 339 selfloop transitions, 24 changer transitions 0/370 dead transitions. [2022-12-13 12:31:20,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 370 transitions, 3332 flow [2022-12-13 12:31:20,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 12:31:20,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 12:31:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2785 transitions. [2022-12-13 12:31:20,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4060358652864849 [2022-12-13 12:31:20,683 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2785 transitions. [2022-12-13 12:31:20,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2785 transitions. [2022-12-13 12:31:20,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:31:20,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2785 transitions. [2022-12-13 12:31:20,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 146.57894736842104) internal successors, (2785), 19 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:20,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 361.0) internal successors, (7220), 20 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:20,690 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 361.0) internal successors, (7220), 20 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:20,691 INFO L175 Difference]: Start difference. First operand has 138 places, 78 transitions, 619 flow. Second operand 19 states and 2785 transitions. [2022-12-13 12:31:20,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 370 transitions, 3332 flow [2022-12-13 12:31:20,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 370 transitions, 3319 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 12:31:20,992 INFO L231 Difference]: Finished difference. Result has 157 places, 90 transitions, 764 flow [2022-12-13 12:31:20,992 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=764, PETRI_PLACES=157, PETRI_TRANSITIONS=90} [2022-12-13 12:31:20,992 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 100 predicate places. [2022-12-13 12:31:20,992 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 90 transitions, 764 flow [2022-12-13 12:31:20,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 136.33333333333334) internal successors, (2454), 18 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:20,993 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:31:20,993 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:31:21,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:31:21,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:31:21,194 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:31:21,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:31:21,195 INFO L85 PathProgramCache]: Analyzing trace with hash -439698731, now seen corresponding path program 2 times [2022-12-13 12:31:21,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:31:21,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168709901] [2022-12-13 12:31:21,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:31:21,196 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 12:31:21,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:31:21,199 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:31:21,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:31:21,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:31:21,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:31:21,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 12:31:21,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:31:21,434 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:31:21,434 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 12:31:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:31:21,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:31:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:31:23,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:31:23,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168709901] [2022-12-13 12:31:23,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168709901] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:31:23,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:31:23,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 12:31:23,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25536336] [2022-12-13 12:31:23,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:31:23,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 12:31:23,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:31:23,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 12:31:23,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:31:33,587 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 361 [2022-12-13 12:31:33,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 90 transitions, 764 flow. Second operand has 14 states, 14 states have (on average 136.71428571428572) internal successors, (1914), 14 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:33,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:31:33,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 361 [2022-12-13 12:31:33,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:31:47,713 INFO L130 PetriNetUnfolder]: 30201/42505 cut-off events. [2022-12-13 12:31:47,713 INFO L131 PetriNetUnfolder]: For 221564/229287 co-relation queries the response was YES. [2022-12-13 12:31:47,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199373 conditions, 42505 events. 30201/42505 cut-off events. For 221564/229287 co-relation queries the response was YES. Maximal size of possible extension queue 1570. Compared 274714 event pairs, 11757 based on Foata normal form. 7911/48270 useless extension candidates. Maximal degree in co-relation 199313. Up to 11568 conditions per place. [2022-12-13 12:31:48,113 INFO L137 encePairwiseOnDemand]: 353/361 looper letters, 359 selfloop transitions, 25 changer transitions 0/391 dead transitions. [2022-12-13 12:31:48,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 391 transitions, 3724 flow [2022-12-13 12:31:48,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 12:31:48,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 12:31:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2753 transitions. [2022-12-13 12:31:48,119 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4013704621664966 [2022-12-13 12:31:48,119 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2753 transitions. [2022-12-13 12:31:48,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2753 transitions. [2022-12-13 12:31:48,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:31:48,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2753 transitions. [2022-12-13 12:31:48,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 144.89473684210526) internal successors, (2753), 19 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:48,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 361.0) internal successors, (7220), 20 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:48,127 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 361.0) internal successors, (7220), 20 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:48,127 INFO L175 Difference]: Start difference. First operand has 157 places, 90 transitions, 764 flow. Second operand 19 states and 2753 transitions. [2022-12-13 12:31:48,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 391 transitions, 3724 flow [2022-12-13 12:31:48,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 391 transitions, 3544 flow, removed 83 selfloop flow, removed 5 redundant places. [2022-12-13 12:31:48,705 INFO L231 Difference]: Finished difference. Result has 174 places, 101 transitions, 899 flow [2022-12-13 12:31:48,705 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=899, PETRI_PLACES=174, PETRI_TRANSITIONS=101} [2022-12-13 12:31:48,706 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 117 predicate places. [2022-12-13 12:31:48,706 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 101 transitions, 899 flow [2022-12-13 12:31:48,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 136.71428571428572) internal successors, (1914), 14 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:48,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:31:48,706 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 12:31:48,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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)] Forceful destruction successful, exit code 0 [2022-12-13 12:31:48,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:31:48,907 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:31:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:31:48,908 INFO L85 PathProgramCache]: Analyzing trace with hash -465848064, now seen corresponding path program 3 times [2022-12-13 12:31:48,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:31:48,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275506621] [2022-12-13 12:31:48,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:31:48,910 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 12:31:48,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:31:48,913 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:31:48,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:31:49,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 12:31:49,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:31:49,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 12:31:49,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:31:49,228 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:31:49,228 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 12:31:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:31:49,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:31:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:31:51,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:31:51,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275506621] [2022-12-13 12:31:51,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275506621] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:31:51,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:31:51,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 12:31:51,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688931110] [2022-12-13 12:31:51,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:31:51,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 12:31:51,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:31:51,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 12:31:51,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 12:32:05,810 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 361 [2022-12-13 12:32:05,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 101 transitions, 899 flow. Second operand has 24 states, 24 states have (on average 147.0) internal successors, (3528), 24 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:32:05,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:32:05,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 361 [2022-12-13 12:32:05,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:32:38,950 INFO L130 PetriNetUnfolder]: 64089/88162 cut-off events. [2022-12-13 12:32:38,950 INFO L131 PetriNetUnfolder]: For 643052/660317 co-relation queries the response was YES. [2022-12-13 12:32:39,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463245 conditions, 88162 events. 64089/88162 cut-off events. For 643052/660317 co-relation queries the response was YES. Maximal size of possible extension queue 2361. Compared 576284 event pairs, 42287 based on Foata normal form. 17277/105285 useless extension candidates. Maximal degree in co-relation 463180. Up to 25853 conditions per place. [2022-12-13 12:32:39,885 INFO L137 encePairwiseOnDemand]: 357/361 looper letters, 718 selfloop transitions, 24 changer transitions 0/754 dead transitions. [2022-12-13 12:32:39,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 754 transitions, 6934 flow [2022-12-13 12:32:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 12:32:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 12:32:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3998 transitions. [2022-12-13 12:32:39,891 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.461449676823638 [2022-12-13 12:32:39,891 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3998 transitions. [2022-12-13 12:32:39,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3998 transitions. [2022-12-13 12:32:39,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:32:39,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3998 transitions. [2022-12-13 12:32:39,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 166.58333333333334) internal successors, (3998), 24 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:32:39,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 361.0) internal successors, (9025), 25 states have internal predecessors, (9025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:32:39,901 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 361.0) internal successors, (9025), 25 states have internal predecessors, (9025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:32:39,902 INFO L175 Difference]: Start difference. First operand has 174 places, 101 transitions, 899 flow. Second operand 24 states and 3998 transitions. [2022-12-13 12:32:39,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 754 transitions, 6934 flow [2022-12-13 12:32:43,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 754 transitions, 6875 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-12-13 12:32:43,054 INFO L231 Difference]: Finished difference. Result has 201 places, 114 transitions, 1051 flow [2022-12-13 12:32:43,055 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1051, PETRI_PLACES=201, PETRI_TRANSITIONS=114} [2022-12-13 12:32:43,055 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 144 predicate places. [2022-12-13 12:32:43,055 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 114 transitions, 1051 flow [2022-12-13 12:32:43,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 147.0) internal successors, (3528), 24 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:32:43,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:32:43,055 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:32:43,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 12:32:43,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:32:43,257 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:32:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:32:43,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2109729503, now seen corresponding path program 2 times [2022-12-13 12:32:43,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:32:43,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726189819] [2022-12-13 12:32:43,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:32:43,259 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 12:32:43,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:32:43,262 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:32:43,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:32:43,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:32:43,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:32:43,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:32:43,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:32:43,478 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:32:43,478 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 12:32:43,649 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 12:32:43,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:32:43,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:32:43,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726189819] [2022-12-13 12:32:43,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726189819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:32:43,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:32:43,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:32:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249526769] [2022-12-13 12:32:43,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:32:43,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:32:43,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:32:43,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:32:43,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:32:44,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 361 [2022-12-13 12:32:44,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 114 transitions, 1051 flow. Second operand has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:32:44,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:32:44,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 361 [2022-12-13 12:32:44,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:32:58,906 INFO L130 PetriNetUnfolder]: 67379/94535 cut-off events. [2022-12-13 12:32:58,906 INFO L131 PetriNetUnfolder]: For 626195/643442 co-relation queries the response was YES. [2022-12-13 12:32:59,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474571 conditions, 94535 events. 67379/94535 cut-off events. For 626195/643442 co-relation queries the response was YES. Maximal size of possible extension queue 1889. Compared 619965 event pairs, 40777 based on Foata normal form. 25423/119855 useless extension candidates. Maximal degree in co-relation 474494. Up to 78565 conditions per place. [2022-12-13 12:33:00,082 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 137 selfloop transitions, 19 changer transitions 0/163 dead transitions. [2022-12-13 12:33:00,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 163 transitions, 1747 flow [2022-12-13 12:33:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:33:00,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:33:00,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 745 transitions. [2022-12-13 12:33:00,085 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41274238227146814 [2022-12-13 12:33:00,085 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 745 transitions. [2022-12-13 12:33:00,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 745 transitions. [2022-12-13 12:33:00,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:00,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 745 transitions. [2022-12-13 12:33:00,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:00,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:00,089 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:00,089 INFO L175 Difference]: Start difference. First operand has 201 places, 114 transitions, 1051 flow. Second operand 5 states and 745 transitions. [2022-12-13 12:33:00,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 163 transitions, 1747 flow [2022-12-13 12:33:04,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 163 transitions, 1691 flow, removed 17 selfloop flow, removed 10 redundant places. [2022-12-13 12:33:04,599 INFO L231 Difference]: Finished difference. Result has 195 places, 114 transitions, 1051 flow [2022-12-13 12:33:04,600 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1051, PETRI_PLACES=195, PETRI_TRANSITIONS=114} [2022-12-13 12:33:04,600 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 138 predicate places. [2022-12-13 12:33:04,600 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 114 transitions, 1051 flow [2022-12-13 12:33:04,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:04,601 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:04,601 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-12-13 12:33:04,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:33:04,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:33:04,802 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:33:04,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:04,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1493157405, now seen corresponding path program 4 times [2022-12-13 12:33:04,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:33:04,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784662111] [2022-12-13 12:33:04,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:33:04,804 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 12:33:04,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:33:04,807 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:33:04,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:33:04,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:33:04,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:33:04,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 12:33:04,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:05,038 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:33:05,039 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 12:33:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:05,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:07,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:33:07,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784662111] [2022-12-13 12:33:07,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784662111] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:07,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:33:07,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 12:33:07,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933721444] [2022-12-13 12:33:07,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:07,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 12:33:07,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:33:07,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 12:33:07,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-12-13 12:33:20,898 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 361 [2022-12-13 12:33:20,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 114 transitions, 1051 flow. Second operand has 24 states, 24 states have (on average 140.08333333333334) internal successors, (3362), 24 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:20,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:20,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 361 [2022-12-13 12:33:20,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:34:03,666 INFO L130 PetriNetUnfolder]: 95031/131183 cut-off events. [2022-12-13 12:34:03,667 INFO L131 PetriNetUnfolder]: For 1379593/1411204 co-relation queries the response was YES. [2022-12-13 12:34:04,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704486 conditions, 131183 events. 95031/131183 cut-off events. For 1379593/1411204 co-relation queries the response was YES. Maximal size of possible extension queue 2472. Compared 888735 event pairs, 10835 based on Foata normal form. 48495/179435 useless extension candidates. Maximal degree in co-relation 704407. Up to 28464 conditions per place. [2022-12-13 12:34:05,546 INFO L137 encePairwiseOnDemand]: 354/361 looper letters, 701 selfloop transitions, 47 changer transitions 0/756 dead transitions. [2022-12-13 12:34:05,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 756 transitions, 7070 flow [2022-12-13 12:34:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 12:34:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 12:34:05,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5574 transitions. [2022-12-13 12:34:05,554 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4173092760350378 [2022-12-13 12:34:05,554 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5574 transitions. [2022-12-13 12:34:05,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5574 transitions. [2022-12-13 12:34:05,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:34:05,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5574 transitions. [2022-12-13 12:34:05,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 150.64864864864865) internal successors, (5574), 37 states have internal predecessors, (5574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:05,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 361.0) internal successors, (13718), 38 states have internal predecessors, (13718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:05,569 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 361.0) internal successors, (13718), 38 states have internal predecessors, (13718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:05,569 INFO L175 Difference]: Start difference. First operand has 195 places, 114 transitions, 1051 flow. Second operand 37 states and 5574 transitions. [2022-12-13 12:34:05,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 756 transitions, 7070 flow [2022-12-13 12:34:11,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 756 transitions, 6765 flow, removed 105 selfloop flow, removed 5 redundant places. [2022-12-13 12:34:11,419 INFO L231 Difference]: Finished difference. Result has 232 places, 127 transitions, 1225 flow [2022-12-13 12:34:11,419 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1225, PETRI_PLACES=232, PETRI_TRANSITIONS=127} [2022-12-13 12:34:11,420 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 175 predicate places. [2022-12-13 12:34:11,420 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 127 transitions, 1225 flow [2022-12-13 12:34:11,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 140.08333333333334) internal successors, (3362), 24 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:11,420 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:34:11,420 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-12-13 12:34:11,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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)] Forceful destruction successful, exit code 0 [2022-12-13 12:34:11,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:34:11,621 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:34:11,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:34:11,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1509891038, now seen corresponding path program 5 times [2022-12-13 12:34:11,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:34:11,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590051394] [2022-12-13 12:34:11,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:34:11,624 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 12:34:11,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:34:11,627 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:34:11,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:34:11,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 12:34:11,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:34:11,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 12:34:11,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:34:11,968 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:34:11,968 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 12:34:12,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 10 [2022-12-13 12:34:12,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 12:34:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:34:12,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:34:12,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-13 12:34:12,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-13 12:34:12,544 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 12:34:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:34:14,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:34:14,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590051394] [2022-12-13 12:34:14,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590051394] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:34:14,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:34:14,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2022-12-13 12:34:14,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612838933] [2022-12-13 12:34:14,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:34:14,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 12:34:14,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:34:14,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 12:34:14,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-12-13 12:34:37,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 361 [2022-12-13 12:34:37,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 127 transitions, 1225 flow. Second operand has 22 states, 22 states have (on average 141.1818181818182) internal successors, (3106), 22 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:37,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:34:37,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 361 [2022-12-13 12:34:37,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:35:05,147 INFO L130 PetriNetUnfolder]: 93457/129253 cut-off events. [2022-12-13 12:35:05,147 INFO L131 PetriNetUnfolder]: For 1097839/1127423 co-relation queries the response was YES. [2022-12-13 12:35:06,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699800 conditions, 129253 events. 93457/129253 cut-off events. For 1097839/1127423 co-relation queries the response was YES. Maximal size of possible extension queue 2458. Compared 848364 event pairs, 58991 based on Foata normal form. 29730/158362 useless extension candidates. Maximal degree in co-relation 699717. Up to 113166 conditions per place. [2022-12-13 12:35:07,101 INFO L137 encePairwiseOnDemand]: 352/361 looper letters, 393 selfloop transitions, 40 changer transitions 0/441 dead transitions. [2022-12-13 12:35:07,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 441 transitions, 4058 flow [2022-12-13 12:35:07,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 12:35:07,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 12:35:07,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3461 transitions. [2022-12-13 12:35:07,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4168372877273275 [2022-12-13 12:35:07,106 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3461 transitions. [2022-12-13 12:35:07,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3461 transitions. [2022-12-13 12:35:07,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:35:07,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3461 transitions. [2022-12-13 12:35:07,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 150.47826086956522) internal successors, (3461), 23 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:07,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 361.0) internal successors, (8664), 24 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:07,121 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 361.0) internal successors, (8664), 24 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:07,121 INFO L175 Difference]: Start difference. First operand has 232 places, 127 transitions, 1225 flow. Second operand 23 states and 3461 transitions. [2022-12-13 12:35:07,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 441 transitions, 4058 flow [2022-12-13 12:35:39,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 441 transitions, 3826 flow, removed 43 selfloop flow, removed 33 redundant places. [2022-12-13 12:35:39,945 INFO L231 Difference]: Finished difference. Result has 222 places, 143 transitions, 1273 flow [2022-12-13 12:35:39,946 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1273, PETRI_PLACES=222, PETRI_TRANSITIONS=143} [2022-12-13 12:35:39,946 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 165 predicate places. [2022-12-13 12:35:39,946 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 143 transitions, 1273 flow [2022-12-13 12:35:39,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 141.1818181818182) internal successors, (3106), 22 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:39,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:35:39,946 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:35:39,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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)] Forceful destruction successful, exit code 0 [2022-12-13 12:35:40,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:35:40,148 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:35:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:35:40,149 INFO L85 PathProgramCache]: Analyzing trace with hash -192621250, now seen corresponding path program 3 times [2022-12-13 12:35:40,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:35:40,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968633410] [2022-12-13 12:35:40,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:35:40,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 12:35:40,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:35:40,153 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:35:40,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:35:40,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 12:35:40,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:35:40,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:35:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:35:40,576 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:35:40,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 12:35:40,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 10 [2022-12-13 12:35:40,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 12:35:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:35:40,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:35:41,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-13 12:35:41,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-13 12:35:41,109 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 12:35:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:35:43,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:35:43,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968633410] [2022-12-13 12:35:43,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968633410] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:35:43,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:35:43,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 12:35:43,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273777868] [2022-12-13 12:35:43,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:35:43,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 12:35:43,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:35:43,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 12:35:43,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-13 12:35:52,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 361 [2022-12-13 12:35:52,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 143 transitions, 1273 flow. Second operand has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:52,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:35:52,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 361 [2022-12-13 12:35:52,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:36:20,048 INFO L130 PetriNetUnfolder]: 121091/167313 cut-off events. [2022-12-13 12:36:20,049 INFO L131 PetriNetUnfolder]: For 1205227/1225495 co-relation queries the response was YES. [2022-12-13 12:36:21,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 818556 conditions, 167313 events. 121091/167313 cut-off events. For 1205227/1225495 co-relation queries the response was YES. Maximal size of possible extension queue 2888. Compared 1140454 event pairs, 18131 based on Foata normal form. 31986/199192 useless extension candidates. Maximal degree in co-relation 818481. Up to 55792 conditions per place. [2022-12-13 12:36:22,371 INFO L137 encePairwiseOnDemand]: 356/361 looper letters, 325 selfloop transitions, 26 changer transitions 0/358 dead transitions. [2022-12-13 12:36:22,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 358 transitions, 3709 flow [2022-12-13 12:36:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:36:22,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:36:22,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1045 transitions. [2022-12-13 12:36:22,375 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41353383458646614 [2022-12-13 12:36:22,375 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1045 transitions. [2022-12-13 12:36:22,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1045 transitions. [2022-12-13 12:36:22,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:36:22,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1045 transitions. [2022-12-13 12:36:22,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 149.28571428571428) internal successors, (1045), 7 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:36:22,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:36:22,380 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:36:22,380 INFO L175 Difference]: Start difference. First operand has 222 places, 143 transitions, 1273 flow. Second operand 7 states and 1045 transitions. [2022-12-13 12:36:22,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 358 transitions, 3709 flow [2022-12-13 12:36:48,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 358 transitions, 3618 flow, removed 5 selfloop flow, removed 15 redundant places. [2022-12-13 12:36:48,953 INFO L231 Difference]: Finished difference. Result has 213 places, 144 transitions, 1306 flow [2022-12-13 12:36:48,954 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1306, PETRI_PLACES=213, PETRI_TRANSITIONS=144} [2022-12-13 12:36:48,954 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 156 predicate places. [2022-12-13 12:36:48,954 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 144 transitions, 1306 flow [2022-12-13 12:36:48,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:36:48,955 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:36:48,955 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:36:48,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:36:49,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:36:49,156 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:36:49,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:36:49,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1964546423, now seen corresponding path program 3 times [2022-12-13 12:36:49,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:36:49,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625822314] [2022-12-13 12:36:49,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:36:49,158 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 12:36:49,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:36:49,161 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:36:49,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:36:49,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 12:36:49,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:36:49,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 12:36:49,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:36:49,470 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:36:49,470 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 12:36:49,534 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 13 treesize of output 9 [2022-12-13 12:36:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:36:49,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:36:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:36:50,044 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:36:50,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625822314] [2022-12-13 12:36:50,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625822314] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:36:50,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:36:50,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 12:36:50,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629449701] [2022-12-13 12:36:50,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:36:50,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 12:36:50,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:36:50,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 12:36:50,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:36:54,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 361 [2022-12-13 12:36:54,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 144 transitions, 1306 flow. Second operand has 14 states, 14 states have (on average 138.57142857142858) internal successors, (1940), 14 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:36:54,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:36:54,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 361 [2022-12-13 12:36:54,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:37:20,685 INFO L130 PetriNetUnfolder]: 110914/153321 cut-off events. [2022-12-13 12:37:20,686 INFO L131 PetriNetUnfolder]: For 1559839/1582089 co-relation queries the response was YES. [2022-12-13 12:37:22,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 782619 conditions, 153321 events. 110914/153321 cut-off events. For 1559839/1582089 co-relation queries the response was YES. Maximal size of possible extension queue 2651. Compared 1026754 event pairs, 49729 based on Foata normal form. 22350/175551 useless extension candidates. Maximal degree in co-relation 782544. Up to 92061 conditions per place. [2022-12-13 12:37:22,594 INFO L137 encePairwiseOnDemand]: 354/361 looper letters, 258 selfloop transitions, 22 changer transitions 0/289 dead transitions. [2022-12-13 12:37:22,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 289 transitions, 2789 flow [2022-12-13 12:37:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:37:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 12:37:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2046 transitions. [2022-12-13 12:37:22,598 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40482785912148794 [2022-12-13 12:37:22,598 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2046 transitions. [2022-12-13 12:37:22,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2046 transitions. [2022-12-13 12:37:22,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:37:22,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2046 transitions. [2022-12-13 12:37:22,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 146.14285714285714) internal successors, (2046), 14 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:22,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 361.0) internal successors, (5415), 15 states have internal predecessors, (5415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:22,603 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 361.0) internal successors, (5415), 15 states have internal predecessors, (5415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:22,604 INFO L175 Difference]: Start difference. First operand has 213 places, 144 transitions, 1306 flow. Second operand 14 states and 2046 transitions. [2022-12-13 12:37:22,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 289 transitions, 2789 flow [2022-12-13 12:37:58,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 289 transitions, 2727 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-12-13 12:37:58,843 INFO L231 Difference]: Finished difference. Result has 226 places, 143 transitions, 1317 flow [2022-12-13 12:37:58,843 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1317, PETRI_PLACES=226, PETRI_TRANSITIONS=143} [2022-12-13 12:37:58,843 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 169 predicate places. [2022-12-13 12:37:58,843 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 143 transitions, 1317 flow [2022-12-13 12:37:58,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 138.57142857142858) internal successors, (1940), 14 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:58,844 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:37:58,844 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:37:58,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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)] Forceful destruction successful, exit code 0 [2022-12-13 12:37:59,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:37:59,045 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:37:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:37:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1997281044, now seen corresponding path program 4 times [2022-12-13 12:37:59,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:37:59,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769005766] [2022-12-13 12:37:59,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:37:59,048 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 12:37:59,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:37:59,051 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:37:59,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:37:59,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:37:59,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:37:59,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 12:37:59,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:37:59,311 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:37:59,312 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 12:37:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:37:59,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:38:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:38:01,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:38:01,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769005766] [2022-12-13 12:38:01,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769005766] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:38:01,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:38:01,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 12:38:01,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926852873] [2022-12-13 12:38:01,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:38:01,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 12:38:01,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:38:01,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 12:38:01,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-12-13 12:38:26,724 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 361 [2022-12-13 12:38:26,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 143 transitions, 1317 flow. Second operand has 23 states, 23 states have (on average 136.30434782608697) internal successors, (3135), 23 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:26,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:38:26,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 361 [2022-12-13 12:38:26,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:39:17,255 INFO L130 PetriNetUnfolder]: 119118/164758 cut-off events. [2022-12-13 12:39:17,255 INFO L131 PetriNetUnfolder]: For 1647120/1671105 co-relation queries the response was YES. [2022-12-13 12:39:18,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874681 conditions, 164758 events. 119118/164758 cut-off events. For 1647120/1671105 co-relation queries the response was YES. Maximal size of possible extension queue 3079. Compared 1123737 event pairs, 41690 based on Foata normal form. 24875/189590 useless extension candidates. Maximal degree in co-relation 874602. Up to 68982 conditions per place. [2022-12-13 12:39:19,309 INFO L137 encePairwiseOnDemand]: 353/361 looper letters, 695 selfloop transitions, 42 changer transitions 0/746 dead transitions. [2022-12-13 12:39:19,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 746 transitions, 7066 flow [2022-12-13 12:39:19,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 12:39:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 12:39:19,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4662 transitions. [2022-12-13 12:39:19,317 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4035664819944598 [2022-12-13 12:39:19,317 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4662 transitions. [2022-12-13 12:39:19,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4662 transitions. [2022-12-13 12:39:19,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:39:19,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4662 transitions. [2022-12-13 12:39:19,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 145.6875) internal successors, (4662), 32 states have internal predecessors, (4662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:39:19,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 361.0) internal successors, (11913), 33 states have internal predecessors, (11913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:39:19,328 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 361.0) internal successors, (11913), 33 states have internal predecessors, (11913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:39:19,328 INFO L175 Difference]: Start difference. First operand has 226 places, 143 transitions, 1317 flow. Second operand 32 states and 4662 transitions. [2022-12-13 12:39:19,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 746 transitions, 7066 flow [2022-12-13 12:40:17,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 746 transitions, 7035 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-12-13 12:40:17,769 INFO L231 Difference]: Finished difference. Result has 254 places, 149 transitions, 1483 flow [2022-12-13 12:40:17,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1483, PETRI_PLACES=254, PETRI_TRANSITIONS=149} [2022-12-13 12:40:17,770 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 197 predicate places. [2022-12-13 12:40:17,770 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 149 transitions, 1483 flow [2022-12-13 12:40:17,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 136.30434782608697) internal successors, (3135), 23 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:17,771 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:40:17,771 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:40:17,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:40:17,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:40:17,972 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 12:40:17,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:40:17,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1066994445, now seen corresponding path program 5 times [2022-12-13 12:40:17,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:40:17,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751818779] [2022-12-13 12:40:17,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:40:17,974 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 12:40:17,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:40:17,977 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:40:17,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21883586-a2c6-4180-b05e-35209915ca0f/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 12:40:18,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 12:40:18,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:40:18,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 12:40:18,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:40:18,247 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:40:18,247 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 12:40:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:40:18,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:40:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:40:20,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:40:20,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751818779] [2022-12-13 12:40:20,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751818779] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:40:20,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:40:20,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 12:40:20,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672865202] [2022-12-13 12:40:20,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:40:20,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 12:40:20,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:40:20,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 12:40:20,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-12-13 12:40:40,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 361 [2022-12-13 12:40:40,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 149 transitions, 1483 flow. Second operand has 24 states, 24 states have (on average 139.25) internal successors, (3342), 24 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:40,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:40:40,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 361 [2022-12-13 12:40:40,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand