./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/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_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/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_09a13bf7-770b-4b98-9f02-47cf9da25338/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 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 --- 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 12:01:37,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:01:37,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:01:37,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:01:37,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:01:37,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:01:37,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:01:37,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:01:37,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:01:37,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:01:37,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:01:37,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:01:37,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:01:37,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:01:37,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:01:37,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:01:37,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:01:37,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:01:37,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:01:37,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:01:37,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:01:37,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:01:37,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:01:37,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:01:37,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:01:37,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:01:37,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:01:37,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:01:37,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:01:37,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:01:37,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:01:37,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:01:37,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:01:37,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:01:37,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:01:37,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:01:37,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:01:37,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:01:37,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:01:37,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:01:37,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:01:37,563 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 12:01:37,583 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:01:37,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:01:37,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:01:37,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:01:37,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:01:37,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:01:37,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:01:37,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:01:37,586 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:01:37,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:01:37,586 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:01:37,587 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 12:01:37,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:01:37,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:01:37,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:01:37,587 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 12:01:37,588 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 12:01:37,588 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 12:01:37,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:01:37,588 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 12:01:37,588 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:01:37,588 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:01:37,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:01:37,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:01:37,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:01:37,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:01:37,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:01:37,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:01:37,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:01:37,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:01:37,590 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:01:37,590 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:01:37,591 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:01:37,591 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:01:37,591 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_09a13bf7-770b-4b98-9f02-47cf9da25338/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 [2022-12-13 12:01:37,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:01:37,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:01:37,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:01:37,811 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:01:37,811 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:01:37,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2022-12-13 12:01:40,361 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:01:40,537 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:01:40,537 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2022-12-13 12:01:40,544 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/data/8408b4c44/f8693fd45e454baf85ea3e2e050b123e/FLAGde2fe2d47 [2022-12-13 12:01:40,958 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/data/8408b4c44/f8693fd45e454baf85ea3e2e050b123e [2022-12-13 12:01:40,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:01:40,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:01:40,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:01:40,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:01:40,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:01:40,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:01:40" (1/1) ... [2022-12-13 12:01:40,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51dc9029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:40, skipping insertion in model container [2022-12-13 12:01:40,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:01:40" (1/1) ... [2022-12-13 12:01:40,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:01:40,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:01:41,101 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:01:41,102 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:01:41,103 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:01:41,104 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:01:41,105 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:01:41,105 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:01:41,113 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_09a13bf7-770b-4b98-9f02-47cf9da25338/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c[2815,2828] [2022-12-13 12:01:41,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:01:41,130 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 12:01:41,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@66800db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:41, skipping insertion in model container [2022-12-13 12:01:41,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:01:41,131 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 12:01:41,132 INFO L158 Benchmark]: Toolchain (without parser) took 166.04ms. Allocated memory is still 119.5MB. Free memory was 82.9MB in the beginning and 72.5MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 12:01:41,132 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 119.5MB. Free memory was 83.8MB in the beginning and 83.8MB in the end (delta: 24.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 12:01:41,133 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.55ms. Allocated memory is still 119.5MB. Free memory was 82.9MB in the beginning and 72.5MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 12:01:41,134 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 119.5MB. Free memory was 83.8MB in the beginning and 83.8MB in the end (delta: 24.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 163.55ms. Allocated memory is still 119.5MB. Free memory was 82.9MB in the beginning and 72.5MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 123]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/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_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/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_09a13bf7-770b-4b98-9f02-47cf9da25338/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 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 --- 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 12:01:42,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:01:42,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:01:42,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:01:42,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:01:42,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:01:42,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:01:42,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:01:42,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:01:42,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:01:42,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:01:42,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:01:42,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:01:42,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:01:42,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:01:42,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:01:42,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:01:42,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:01:42,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:01:42,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:01:42,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:01:42,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:01:42,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:01:42,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:01:42,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:01:42,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:01:42,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:01:42,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:01:42,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:01:42,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:01:42,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:01:42,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:01:42,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:01:42,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:01:42,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:01:42,609 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:01:42,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:01:42,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:01:42,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:01:42,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:01:42,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:01:42,612 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 12:01:42,634 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:01:42,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:01:42,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:01:42,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:01:42,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:01:42,636 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:01:42,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:01:42,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:01:42,637 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:01:42,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:01:42,637 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:01:42,637 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 12:01:42,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:01:42,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:01:42,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:01:42,638 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 12:01:42,638 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 12:01:42,638 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 12:01:42,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:01:42,639 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 12:01:42,639 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 12:01:42,639 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 12:01:42,639 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:01:42,639 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:01:42,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:01:42,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:01:42,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:01:42,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:01:42,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:01:42,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:01:42,641 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 12:01:42,641 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 12:01:42,641 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:01:42,641 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:01:42,641 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:01:42,641 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 12:01:42,641 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:01:42,642 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_09a13bf7-770b-4b98-9f02-47cf9da25338/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 [2022-12-13 12:01:42,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:01:42,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:01:42,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:01:42,917 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:01:42,917 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:01:42,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2022-12-13 12:01:45,562 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:01:45,732 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:01:45,732 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2022-12-13 12:01:45,740 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/data/29d6becb2/52aca9dc100d4850a825e7d80da8def5/FLAG20f689ebb [2022-12-13 12:01:45,755 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/data/29d6becb2/52aca9dc100d4850a825e7d80da8def5 [2022-12-13 12:01:45,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:01:45,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:01:45,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:01:45,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:01:45,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:01:45,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:01:45" (1/1) ... [2022-12-13 12:01:45,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c2943e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:45, skipping insertion in model container [2022-12-13 12:01:45,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:01:45" (1/1) ... [2022-12-13 12:01:45,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:01:45,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:01:45,958 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:01:45,960 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:01:45,961 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:01:45,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:01:45,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:01:45,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:01:45,974 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_09a13bf7-770b-4b98-9f02-47cf9da25338/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c[2815,2828] [2022-12-13 12:01:45,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:01:45,999 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 12:01:46,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:01:46,010 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:01:46,011 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:01:46,012 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:01:46,012 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:01:46,013 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:01:46,013 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:01:46,018 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_09a13bf7-770b-4b98-9f02-47cf9da25338/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c[2815,2828] [2022-12-13 12:01:46,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:01:46,028 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:01:46,040 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:01:46,041 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:01:46,042 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:01:46,042 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:01:46,042 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:01:46,043 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:01:46,046 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_09a13bf7-770b-4b98-9f02-47cf9da25338/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c[2815,2828] [2022-12-13 12:01:46,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:01:46,062 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:01:46,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:46 WrapperNode [2022-12-13 12:01:46,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:01:46,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:01:46,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:01:46,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:01:46,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:46" (1/1) ... [2022-12-13 12:01:46,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:46" (1/1) ... [2022-12-13 12:01:46,098 INFO L138 Inliner]: procedures = 28, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 225 [2022-12-13 12:01:46,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:01:46,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:01:46,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:01:46,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:01:46,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:46" (1/1) ... [2022-12-13 12:01:46,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:46" (1/1) ... [2022-12-13 12:01:46,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:46" (1/1) ... [2022-12-13 12:01:46,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:46" (1/1) ... [2022-12-13 12:01:46,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:46" (1/1) ... [2022-12-13 12:01:46,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:46" (1/1) ... [2022-12-13 12:01:46,124 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:46" (1/1) ... [2022-12-13 12:01:46,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:46" (1/1) ... [2022-12-13 12:01:46,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:01:46,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:01:46,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:01:46,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:01:46,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:46" (1/1) ... [2022-12-13 12:01:46,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:01:46,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:01:46,151 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:01:46,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:01:46,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:01:46,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 12:01:46,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:01:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 12:01:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 12:01:46,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 12:01:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 12:01:46,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 12:01:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 12:01:46,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 12:01:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 12:01:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 12:01:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 12:01:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:01:46,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:01:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:01:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 12:01:46,186 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 12:01:46,271 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:01:46,273 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:01:46,915 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:01:47,023 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:01:47,024 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 12:01:47,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:01:47 BoogieIcfgContainer [2022-12-13 12:01:47,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:01:47,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:01:47,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:01:47,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:01:47,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:01:45" (1/3) ... [2022-12-13 12:01:47,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@603937b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:01:47, skipping insertion in model container [2022-12-13 12:01:47,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:01:46" (2/3) ... [2022-12-13 12:01:47,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@603937b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:01:47, skipping insertion in model container [2022-12-13 12:01:47,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:01:47" (3/3) ... [2022-12-13 12:01:47,033 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2022-12-13 12:01:47,047 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:01:47,047 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2022-12-13 12:01:47,047 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 12:01:47,133 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 12:01:47,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 340 places, 357 transitions, 738 flow [2022-12-13 12:01:47,272 INFO L130 PetriNetUnfolder]: 27/354 cut-off events. [2022-12-13 12:01:47,295 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 12:01:47,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 354 events. 27/354 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 424 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 274. Up to 3 conditions per place. [2022-12-13 12:01:47,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 340 places, 357 transitions, 738 flow [2022-12-13 12:01:47,312 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 349 transitions, 716 flow [2022-12-13 12:01:47,315 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:01:47,322 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 349 transitions, 716 flow [2022-12-13 12:01:47,324 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 349 transitions, 716 flow [2022-12-13 12:01:47,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 349 transitions, 716 flow [2022-12-13 12:01:47,362 INFO L130 PetriNetUnfolder]: 27/349 cut-off events. [2022-12-13 12:01:47,363 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 12:01:47,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 349 events. 27/349 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 425 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 274. Up to 3 conditions per place. [2022-12-13 12:01:47,366 INFO L119 LiptonReduction]: Number of co-enabled transitions 5194 [2022-12-13 12:02:45,512 INFO L134 LiptonReduction]: Checked pairs total: 8790 [2022-12-13 12:02:45,513 INFO L136 LiptonReduction]: Total number of compositions: 413 [2022-12-13 12:02:45,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:02:45,530 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;@79e26d10, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:02:45,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-12-13 12:02:45,532 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 12:02:45,533 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:02:45,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:02:45,533 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:02:45,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:02:45,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:45,537 INFO L85 PathProgramCache]: Analyzing trace with hash 45878, now seen corresponding path program 1 times [2022-12-13 12:02:45,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:02:45,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864098325] [2022-12-13 12:02:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:45,546 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 12:02:45,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:02:45,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:02:45,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:02:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:45,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 12:02:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:45,734 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 12:02:45,735 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 12:02:45,763 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 12:02:45,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:02:45,764 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:02:45,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864098325] [2022-12-13 12:02:45,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864098325] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:02:45,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:02:45,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:02:45,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249531814] [2022-12-13 12:02:45,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:02:45,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:02:45,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:02:45,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:02:45,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:02:46,035 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 770 [2022-12-13 12:02:46,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:46,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:02:46,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 770 [2022-12-13 12:02:46,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:02:47,695 INFO L130 PetriNetUnfolder]: 10033/12338 cut-off events. [2022-12-13 12:02:47,695 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2022-12-13 12:02:47,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24831 conditions, 12338 events. 10033/12338 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 1110. Compared 54076 event pairs, 4645 based on Foata normal form. 0/3338 useless extension candidates. Maximal degree in co-relation 22597. Up to 12265 conditions per place. [2022-12-13 12:02:47,764 INFO L137 encePairwiseOnDemand]: 755/770 looper letters, 60 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2022-12-13 12:02:47,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 272 flow [2022-12-13 12:02:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:02:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:02:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1002 transitions. [2022-12-13 12:02:47,779 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43376623376623374 [2022-12-13 12:02:47,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1002 transitions. [2022-12-13 12:02:47,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1002 transitions. [2022-12-13 12:02:47,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:02:47,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1002 transitions. [2022-12-13 12:02:47,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:47,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:47,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:47,801 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 178 flow. Second operand 3 states and 1002 transitions. [2022-12-13 12:02:47,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 272 flow [2022-12-13 12:02:47,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 260 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 12:02:47,810 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 140 flow [2022-12-13 12:02:47,812 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2022-12-13 12:02:47,815 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -18 predicate places. [2022-12-13 12:02:47,815 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 140 flow [2022-12-13 12:02:47,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:47,815 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:02:47,815 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:02:47,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:02:48,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:02:48,017 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:02:48,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:48,019 INFO L85 PathProgramCache]: Analyzing trace with hash 45879, now seen corresponding path program 1 times [2022-12-13 12:02:48,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:02:48,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537944133] [2022-12-13 12:02:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:48,021 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 12:02:48,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:02:48,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:02:48,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:02:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:48,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 12:02:48,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:48,199 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:02:48,200 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 12:02:48,236 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 12:02:48,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:02:48,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:02:48,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537944133] [2022-12-13 12:02:48,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537944133] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:02:48,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:02:48,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:02:48,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109239482] [2022-12-13 12:02:48,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:02:48,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:02:48,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:02:48,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:02:48,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:02:48,642 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 770 [2022-12-13 12:02:48,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:48,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:02:48,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 770 [2022-12-13 12:02:48,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:02:50,105 INFO L130 PetriNetUnfolder]: 10033/12339 cut-off events. [2022-12-13 12:02:50,105 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 12:02:50,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24690 conditions, 12339 events. 10033/12339 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1110. Compared 54112 event pairs, 4645 based on Foata normal form. 0/3339 useless extension candidates. Maximal degree in co-relation 24684. Up to 12266 conditions per place. [2022-12-13 12:02:50,150 INFO L137 encePairwiseOnDemand]: 766/770 looper letters, 60 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-12-13 12:02:50,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 67 transitions, 266 flow [2022-12-13 12:02:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:02:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:02:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 973 transitions. [2022-12-13 12:02:50,154 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4212121212121212 [2022-12-13 12:02:50,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 973 transitions. [2022-12-13 12:02:50,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 973 transitions. [2022-12-13 12:02:50,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:02:50,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 973 transitions. [2022-12-13 12:02:50,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:50,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:50,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:50,160 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 140 flow. Second operand 3 states and 973 transitions. [2022-12-13 12:02:50,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 67 transitions, 266 flow [2022-12-13 12:02:50,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 265 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:02:50,161 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 153 flow [2022-12-13 12:02:50,161 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2022-12-13 12:02:50,162 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -16 predicate places. [2022-12-13 12:02:50,162 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 153 flow [2022-12-13 12:02:50,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:50,163 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:02:50,163 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 12:02:50,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:02:50,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:02:50,364 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:02:50,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:50,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1429905, now seen corresponding path program 1 times [2022-12-13 12:02:50,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:02:50,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360924857] [2022-12-13 12:02:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:50,365 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 12:02:50,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:02:50,366 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:02:50,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:02:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:50,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:02:50,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:50,564 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:02:50,564 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 12:02:50,618 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 12:02:50,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:50,841 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 12:02:50,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:02:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360924857] [2022-12-13 12:02:50,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360924857] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:50,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:02:50,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 12:02:50,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510017338] [2022-12-13 12:02:50,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:50,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:02:50,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:02:50,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:02:50,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:02:52,285 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 770 [2022-12-13 12:02:52,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 153 flow. Second operand has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:52,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:02:52,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 770 [2022-12-13 12:02:52,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:02:53,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:02:55,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:02:56,707 INFO L130 PetriNetUnfolder]: 10052/12365 cut-off events. [2022-12-13 12:02:56,708 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 12:02:56,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24755 conditions, 12365 events. 10052/12365 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1110. Compared 54248 event pairs, 4645 based on Foata normal form. 0/3346 useless extension candidates. Maximal degree in co-relation 24747. Up to 12278 conditions per place. [2022-12-13 12:02:56,747 INFO L137 encePairwiseOnDemand]: 754/770 looper letters, 60 selfloop transitions, 28 changer transitions 0/93 dead transitions. [2022-12-13 12:02:56,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 93 transitions, 393 flow [2022-12-13 12:02:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:02:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:02:56,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1859 transitions. [2022-12-13 12:02:56,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2022-12-13 12:02:56,752 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1859 transitions. [2022-12-13 12:02:56,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1859 transitions. [2022-12-13 12:02:56,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:02:56,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1859 transitions. [2022-12-13 12:02:56,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 309.8333333333333) internal successors, (1859), 6 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:56,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 770.0) internal successors, (5390), 7 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:56,762 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 770.0) internal successors, (5390), 7 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:56,762 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 153 flow. Second operand 6 states and 1859 transitions. [2022-12-13 12:02:56,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 93 transitions, 393 flow [2022-12-13 12:02:56,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 93 transitions, 389 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 12:02:56,764 INFO L231 Difference]: Finished difference. Result has 72 places, 93 transitions, 348 flow [2022-12-13 12:02:56,764 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=348, PETRI_PLACES=72, PETRI_TRANSITIONS=93} [2022-12-13 12:02:56,765 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -9 predicate places. [2022-12-13 12:02:56,765 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 93 transitions, 348 flow [2022-12-13 12:02:56,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:56,766 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:02:56,766 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 12:02:56,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:02:56,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:02:56,967 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:02:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:56,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1374489036, now seen corresponding path program 1 times [2022-12-13 12:02:56,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:02:56,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941773289] [2022-12-13 12:02:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:56,967 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 12:02:56,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:02:56,968 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:02:56,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:02:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:57,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:02:57,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:57,104 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 12:02:57,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:57,184 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 12:02:57,185 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:02:57,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941773289] [2022-12-13 12:02:57,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941773289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:57,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:02:57,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 12:02:57,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758819807] [2022-12-13 12:02:57,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:57,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:02:57,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:02:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:02:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:02:57,664 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 770 [2022-12-13 12:02:57,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 348 flow. Second operand has 8 states, 8 states have (on average 305.125) internal successors, (2441), 8 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:57,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:02:57,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 770 [2022-12-13 12:02:57,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:03:02,644 INFO L130 PetriNetUnfolder]: 29856/36779 cut-off events. [2022-12-13 12:03:02,644 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-12-13 12:03:02,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73704 conditions, 36779 events. 29856/36779 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 3060. Compared 183494 event pairs, 13873 based on Foata normal form. 4/10048 useless extension candidates. Maximal degree in co-relation 73692. Up to 12261 conditions per place. [2022-12-13 12:03:02,798 INFO L137 encePairwiseOnDemand]: 754/770 looper letters, 160 selfloop transitions, 56 changer transitions 0/221 dead transitions. [2022-12-13 12:03:02,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 221 transitions, 1174 flow [2022-12-13 12:03:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:03:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:03:02,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3262 transitions. [2022-12-13 12:03:02,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42363636363636364 [2022-12-13 12:03:02,806 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3262 transitions. [2022-12-13 12:03:02,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3262 transitions. [2022-12-13 12:03:02,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:03:02,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3262 transitions. [2022-12-13 12:03:02,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 326.2) internal successors, (3262), 10 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:02,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 770.0) internal successors, (8470), 11 states have internal predecessors, (8470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:02,823 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 770.0) internal successors, (8470), 11 states have internal predecessors, (8470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:02,823 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 348 flow. Second operand 10 states and 3262 transitions. [2022-12-13 12:03:02,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 221 transitions, 1174 flow [2022-12-13 12:03:02,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 221 transitions, 1158 flow, removed 7 selfloop flow, removed 1 redundant places. [2022-12-13 12:03:02,827 INFO L231 Difference]: Finished difference. Result has 83 places, 131 transitions, 752 flow [2022-12-13 12:03:02,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=752, PETRI_PLACES=83, PETRI_TRANSITIONS=131} [2022-12-13 12:03:02,828 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 2 predicate places. [2022-12-13 12:03:02,828 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 131 transitions, 752 flow [2022-12-13 12:03:02,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 305.125) internal successors, (2441), 8 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:02,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:03:02,829 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 12:03:02,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:03:03,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:03:03,030 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:03:03,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:03:03,031 INFO L85 PathProgramCache]: Analyzing trace with hash -343770697, now seen corresponding path program 2 times [2022-12-13 12:03:03,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:03:03,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298720023] [2022-12-13 12:03:03,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:03:03,032 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 12:03:03,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:03:03,033 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:03:03,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:03:03,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:03:03,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:03:03,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 12:03:03,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:03:03,266 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:03:03,266 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 12:03:03,459 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 12:03:03,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:03:04,227 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 12:03:04,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:03:04,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298720023] [2022-12-13 12:03:04,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298720023] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:03:04,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:03:04,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 12:03:04,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583887075] [2022-12-13 12:03:04,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:03:04,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 12:03:04,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:03:04,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 12:03:04,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 12:03:12,576 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 770 [2022-12-13 12:03:12,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 131 transitions, 752 flow. Second operand has 12 states, 12 states have (on average 295.0) internal successors, (3540), 12 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:12,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:03:12,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 770 [2022-12-13 12:03:12,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:03:15,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:03:16,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:03:18,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:03:20,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:03:22,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:03:24,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:03:26,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:03:28,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:03:30,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:03:40,005 INFO L130 PetriNetUnfolder]: 49775/61302 cut-off events. [2022-12-13 12:03:40,005 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2022-12-13 12:03:40,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122902 conditions, 61302 events. 49775/61302 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 4236. Compared 320156 event pairs, 23132 based on Foata normal form. 8/16733 useless extension candidates. Maximal degree in co-relation 122886. Up to 24515 conditions per place. [2022-12-13 12:03:40,303 INFO L137 encePairwiseOnDemand]: 755/770 looper letters, 170 selfloop transitions, 59 changer transitions 0/234 dead transitions. [2022-12-13 12:03:40,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 234 transitions, 1497 flow [2022-12-13 12:03:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 12:03:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 12:03:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 4021 transitions. [2022-12-13 12:03:40,314 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4016983016983017 [2022-12-13 12:03:40,314 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 4021 transitions. [2022-12-13 12:03:40,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 4021 transitions. [2022-12-13 12:03:40,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:03:40,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 4021 transitions. [2022-12-13 12:03:40,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 309.3076923076923) internal successors, (4021), 13 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:40,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 770.0) internal successors, (10780), 14 states have internal predecessors, (10780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:40,350 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 770.0) internal successors, (10780), 14 states have internal predecessors, (10780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:40,351 INFO L175 Difference]: Start difference. First operand has 83 places, 131 transitions, 752 flow. Second operand 13 states and 4021 transitions. [2022-12-13 12:03:40,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 234 transitions, 1497 flow [2022-12-13 12:03:40,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 234 transitions, 1474 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-12-13 12:03:40,361 INFO L231 Difference]: Finished difference. Result has 100 places, 144 transitions, 1034 flow [2022-12-13 12:03:40,362 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1034, PETRI_PLACES=100, PETRI_TRANSITIONS=144} [2022-12-13 12:03:40,362 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 19 predicate places. [2022-12-13 12:03:40,363 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 144 transitions, 1034 flow [2022-12-13 12:03:40,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 295.0) internal successors, (3540), 12 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:40,365 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:03:40,365 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-12-13 12:03:40,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:03:40,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:03:40,566 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:03:40,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:03:40,568 INFO L85 PathProgramCache]: Analyzing trace with hash -889241335, now seen corresponding path program 1 times [2022-12-13 12:03:40,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:03:40,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553775064] [2022-12-13 12:03:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:03:40,569 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 12:03:40,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:03:40,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:03:40,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:03:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:40,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 12:03:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:03:40,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 12:03:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:03:40,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:03:41,697 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 12:03:41,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:03:41,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553775064] [2022-12-13 12:03:41,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553775064] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:03:41,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:03:41,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 12:03:41,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669251712] [2022-12-13 12:03:41,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:03:41,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 12:03:41,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:03:41,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 12:03:41,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-12-13 12:03:49,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 770 [2022-12-13 12:03:49,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 144 transitions, 1034 flow. Second operand has 15 states, 15 states have (on average 290.06666666666666) internal successors, (4351), 15 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:49,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:03:49,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 770 [2022-12-13 12:03:49,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:03:53,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:03:54,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:04:18,779 INFO L130 PetriNetUnfolder]: 138705/170940 cut-off events. [2022-12-13 12:04:18,779 INFO L131 PetriNetUnfolder]: For 213/213 co-relation queries the response was YES. [2022-12-13 12:04:19,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342516 conditions, 170940 events. 138705/170940 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 10625. Compared 985819 event pairs, 64627 based on Foata normal form. 4/46751 useless extension candidates. Maximal degree in co-relation 342493. Up to 36355 conditions per place. [2022-12-13 12:04:19,865 INFO L137 encePairwiseOnDemand]: 754/770 looper letters, 449 selfloop transitions, 85 changer transitions 0/539 dead transitions. [2022-12-13 12:04:19,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 539 transitions, 3501 flow [2022-12-13 12:04:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:04:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 12:04:19,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 5093 transitions. [2022-12-13 12:04:19,875 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4133928571428571 [2022-12-13 12:04:19,875 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 5093 transitions. [2022-12-13 12:04:19,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 5093 transitions. [2022-12-13 12:04:19,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:04:19,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 5093 transitions. [2022-12-13 12:04:19,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 318.3125) internal successors, (5093), 16 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:19,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 770.0) internal successors, (13090), 17 states have internal predecessors, (13090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:19,896 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 770.0) internal successors, (13090), 17 states have internal predecessors, (13090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:19,896 INFO L175 Difference]: Start difference. First operand has 100 places, 144 transitions, 1034 flow. Second operand 16 states and 5093 transitions. [2022-12-13 12:04:19,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 539 transitions, 3501 flow [2022-12-13 12:04:19,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 539 transitions, 3454 flow, removed 21 selfloop flow, removed 2 redundant places. [2022-12-13 12:04:19,905 INFO L231 Difference]: Finished difference. Result has 116 places, 182 transitions, 1518 flow [2022-12-13 12:04:19,906 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1518, PETRI_PLACES=116, PETRI_TRANSITIONS=182} [2022-12-13 12:04:19,906 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 35 predicate places. [2022-12-13 12:04:19,906 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 182 transitions, 1518 flow [2022-12-13 12:04:19,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 290.06666666666666) internal successors, (4351), 15 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:19,907 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:04:19,907 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:04:19,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 12:04:20,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:04:20,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:04:20,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:20,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1968270716, now seen corresponding path program 1 times [2022-12-13 12:04:20,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:04:20,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944486984] [2022-12-13 12:04:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:20,113 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 12:04:20,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:04:20,116 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:04:20,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:04:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:20,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:04:20,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:20,327 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 12:04:20,374 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-13 12:04:20,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 12:04:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:04:20,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:04:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:04:20,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:04:20,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944486984] [2022-12-13 12:04:20,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944486984] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:04:20,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:04:20,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 12:04:20,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490810739] [2022-12-13 12:04:20,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:04:20,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:04:20,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:04:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:04:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:04:23,658 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 770 [2022-12-13 12:04:23,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 182 transitions, 1518 flow. Second operand has 10 states, 10 states have (on average 290.4) internal successors, (2904), 10 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:23,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:04:23,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 770 [2022-12-13 12:04:23,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:04:35,127 INFO L130 PetriNetUnfolder]: 59533/73360 cut-off events. [2022-12-13 12:04:35,127 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2022-12-13 12:04:35,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147176 conditions, 73360 events. 59533/73360 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 3979. Compared 385306 event pairs, 27715 based on Foata normal form. 3/20065 useless extension candidates. Maximal degree in co-relation 147149. Up to 24240 conditions per place. [2022-12-13 12:04:35,663 INFO L137 encePairwiseOnDemand]: 757/770 looper letters, 245 selfloop transitions, 33 changer transitions 0/283 dead transitions. [2022-12-13 12:04:35,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 283 transitions, 2024 flow [2022-12-13 12:04:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:04:35,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 12:04:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4284 transitions. [2022-12-13 12:04:35,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3974025974025974 [2022-12-13 12:04:35,877 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4284 transitions. [2022-12-13 12:04:35,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4284 transitions. [2022-12-13 12:04:35,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:04:35,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4284 transitions. [2022-12-13 12:04:35,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:35,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 770.0) internal successors, (11550), 15 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:35,901 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 770.0) internal successors, (11550), 15 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:35,901 INFO L175 Difference]: Start difference. First operand has 116 places, 182 transitions, 1518 flow. Second operand 14 states and 4284 transitions. [2022-12-13 12:04:35,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 283 transitions, 2024 flow [2022-12-13 12:04:35,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 283 transitions, 1837 flow, removed 24 selfloop flow, removed 8 redundant places. [2022-12-13 12:04:35,912 INFO L231 Difference]: Finished difference. Result has 119 places, 148 transitions, 1059 flow [2022-12-13 12:04:35,913 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1059, PETRI_PLACES=119, PETRI_TRANSITIONS=148} [2022-12-13 12:04:35,913 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 38 predicate places. [2022-12-13 12:04:35,913 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 148 transitions, 1059 flow [2022-12-13 12:04:35,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 290.4) internal successors, (2904), 10 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:35,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:04:35,914 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:04:35,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 12:04:36,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:04:36,115 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:04:36,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:36,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1968270713, now seen corresponding path program 1 times [2022-12-13 12:04:36,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:04:36,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946787982] [2022-12-13 12:04:36,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:36,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 12:04:36,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:04:36,118 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:04:36,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:04:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:36,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 12:04:36,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:36,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 12:04:36,268 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 12:04:36,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 12:04:36,280 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 12:04:36,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:04:36,280 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:04:36,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946787982] [2022-12-13 12:04:36,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946787982] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:04:36,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:04:36,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:04:36,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764396795] [2022-12-13 12:04:36,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:04:36,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:04:36,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:04:36,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:04:36,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:04:36,466 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 770 [2022-12-13 12:04:36,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 148 transitions, 1059 flow. Second operand has 4 states, 4 states have (on average 300.75) internal successors, (1203), 4 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:36,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:04:36,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 770 [2022-12-13 12:04:36,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:04:42,494 INFO L130 PetriNetUnfolder]: 53290/65617 cut-off events. [2022-12-13 12:04:42,494 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-12-13 12:04:42,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131620 conditions, 65617 events. 53290/65617 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 4058. Compared 343196 event pairs, 24648 based on Foata normal form. 0/18201 useless extension candidates. Maximal degree in co-relation 131597. Up to 65198 conditions per place. [2022-12-13 12:04:42,859 INFO L137 encePairwiseOnDemand]: 765/770 looper letters, 126 selfloop transitions, 9 changer transitions 0/139 dead transitions. [2022-12-13 12:04:42,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 139 transitions, 1268 flow [2022-12-13 12:04:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:04:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:04:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1257 transitions. [2022-12-13 12:04:42,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4081168831168831 [2022-12-13 12:04:42,863 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1257 transitions. [2022-12-13 12:04:42,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1257 transitions. [2022-12-13 12:04:42,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:04:42,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1257 transitions. [2022-12-13 12:04:42,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 314.25) internal successors, (1257), 4 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:42,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 770.0) internal successors, (3850), 5 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:42,868 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 770.0) internal successors, (3850), 5 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:42,869 INFO L175 Difference]: Start difference. First operand has 119 places, 148 transitions, 1059 flow. Second operand 4 states and 1257 transitions. [2022-12-13 12:04:42,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 139 transitions, 1268 flow [2022-12-13 12:04:42,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 139 transitions, 1244 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-13 12:04:42,873 INFO L231 Difference]: Finished difference. Result has 116 places, 139 transitions, 992 flow [2022-12-13 12:04:42,873 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=992, PETRI_PLACES=116, PETRI_TRANSITIONS=139} [2022-12-13 12:04:42,874 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 35 predicate places. [2022-12-13 12:04:42,874 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 139 transitions, 992 flow [2022-12-13 12:04:42,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 300.75) internal successors, (1203), 4 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:42,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:04:42,874 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:04:42,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:04:43,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:04:43,075 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:04:43,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:43,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1968270669, now seen corresponding path program 1 times [2022-12-13 12:04:43,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:04:43,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756080012] [2022-12-13 12:04:43,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:43,076 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 12:04:43,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:04:43,077 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:04:43,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:04:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:43,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 12:04:43,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:43,282 INFO L321 Elim1Store]: treesize reduction 103, result has 24.8 percent of original size [2022-12-13 12:04:43,282 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 59 [2022-12-13 12:04:43,387 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-12-13 12:04:43,387 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 3 case distinctions, treesize of input 35 treesize of output 64 [2022-12-13 12:04:43,658 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-12-13 12:04:43,659 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 3 case distinctions, treesize of input 47 treesize of output 76 [2022-12-13 12:04:43,968 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 12:04:43,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:04:43,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:04:43,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756080012] [2022-12-13 12:04:43,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756080012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:04:43,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:04:43,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:04:43,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004618653] [2022-12-13 12:04:43,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:04:43,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:04:43,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:04:43,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:04:43,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:04:45,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 770 [2022-12-13 12:04:45,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 139 transitions, 992 flow. Second operand has 5 states, 5 states have (on average 298.4) internal successors, (1492), 5 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:45,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:04:45,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 770 [2022-12-13 12:04:45,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:04:51,308 INFO L130 PetriNetUnfolder]: 53289/65610 cut-off events. [2022-12-13 12:04:51,308 INFO L131 PetriNetUnfolder]: For 243/243 co-relation queries the response was YES. [2022-12-13 12:04:51,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131588 conditions, 65610 events. 53289/65610 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 4020. Compared 342939 event pairs, 24648 based on Foata normal form. 0/18201 useless extension candidates. Maximal degree in co-relation 131564. Up to 65169 conditions per place. [2022-12-13 12:04:51,703 INFO L137 encePairwiseOnDemand]: 764/770 looper letters, 95 selfloop transitions, 33 changer transitions 0/132 dead transitions. [2022-12-13 12:04:51,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 132 transitions, 1191 flow [2022-12-13 12:04:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:04:51,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:04:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1543 transitions. [2022-12-13 12:04:51,707 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4007792207792208 [2022-12-13 12:04:51,707 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1543 transitions. [2022-12-13 12:04:51,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1543 transitions. [2022-12-13 12:04:51,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:04:51,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1543 transitions. [2022-12-13 12:04:51,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 308.6) internal successors, (1543), 5 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:51,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:51,713 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:51,713 INFO L175 Difference]: Start difference. First operand has 116 places, 139 transitions, 992 flow. Second operand 5 states and 1543 transitions. [2022-12-13 12:04:51,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 132 transitions, 1191 flow [2022-12-13 12:04:51,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 132 transitions, 1181 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:04:51,717 INFO L231 Difference]: Finished difference. Result has 117 places, 132 transitions, 991 flow [2022-12-13 12:04:51,717 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=991, PETRI_PLACES=117, PETRI_TRANSITIONS=132} [2022-12-13 12:04:51,717 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 36 predicate places. [2022-12-13 12:04:51,718 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 132 transitions, 991 flow [2022-12-13 12:04:51,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 298.4) internal successors, (1492), 5 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:51,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:04:51,718 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:04:51,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:04:51,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:04:51,919 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:04:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:51,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1968270671, now seen corresponding path program 1 times [2022-12-13 12:04:51,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:04:51,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100964705] [2022-12-13 12:04:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:51,923 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 12:04:51,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:04:51,925 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:04:51,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:04:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:52,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 12:04:52,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:52,230 INFO L321 Elim1Store]: treesize reduction 107, result has 21.9 percent of original size [2022-12-13 12:04:52,230 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 55 [2022-12-13 12:04:52,298 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-12-13 12:04:52,298 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 12:04:52,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:04:52,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:04:52,517 INFO L321 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2022-12-13 12:04:52,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 52 [2022-12-13 12:04:52,547 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-12-13 12:04:52,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 12:04:52,637 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-12-13 12:04:52,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-12-13 12:04:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:04:52,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:04:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:04:53,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:04:53,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100964705] [2022-12-13 12:04:53,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100964705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:04:53,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:04:53,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 12:04:53,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106460354] [2022-12-13 12:04:53,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:04:53,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:04:53,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:04:53,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:04:53,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:04:58,613 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 770 [2022-12-13 12:04:58,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 132 transitions, 991 flow. Second operand has 10 states, 10 states have (on average 282.4) internal successors, (2824), 10 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:58,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:04:58,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 770 [2022-12-13 12:04:58,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:05:04,737 INFO L130 PetriNetUnfolder]: 38754/48381 cut-off events. [2022-12-13 12:05:04,737 INFO L131 PetriNetUnfolder]: For 308/308 co-relation queries the response was YES. [2022-12-13 12:05:04,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97101 conditions, 48381 events. 38754/48381 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 2788. Compared 253818 event pairs, 17981 based on Foata normal form. 0/14507 useless extension candidates. Maximal degree in co-relation 97077. Up to 41832 conditions per place. [2022-12-13 12:05:05,011 INFO L137 encePairwiseOnDemand]: 761/770 looper letters, 146 selfloop transitions, 16 changer transitions 0/166 dead transitions. [2022-12-13 12:05:05,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 166 transitions, 1332 flow [2022-12-13 12:05:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:05:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:05:05,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2359 transitions. [2022-12-13 12:05:05,018 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38295454545454544 [2022-12-13 12:05:05,018 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2359 transitions. [2022-12-13 12:05:05,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2359 transitions. [2022-12-13 12:05:05,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:05:05,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2359 transitions. [2022-12-13 12:05:05,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 294.875) internal successors, (2359), 8 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:05,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 770.0) internal successors, (6930), 9 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:05,026 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 770.0) internal successors, (6930), 9 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:05,026 INFO L175 Difference]: Start difference. First operand has 117 places, 132 transitions, 991 flow. Second operand 8 states and 2359 transitions. [2022-12-13 12:05:05,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 166 transitions, 1332 flow [2022-12-13 12:05:05,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 166 transitions, 1280 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 12:05:05,030 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 903 flow [2022-12-13 12:05:05,031 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=903, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2022-12-13 12:05:05,031 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 38 predicate places. [2022-12-13 12:05:05,031 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 903 flow [2022-12-13 12:05:05,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 282.4) internal successors, (2824), 10 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:05,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:05:05,032 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:05:05,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:05:05,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:05:05,234 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:05:05,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:05:05,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1968270715, now seen corresponding path program 1 times [2022-12-13 12:05:05,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:05:05,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304439273] [2022-12-13 12:05:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:05:05,236 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 12:05:05,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:05:05,239 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:05:05,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:05:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:05,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 12:05:05,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:05:05,506 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:05:05,506 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 12:05:05,596 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 12:05:05,596 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 12:05:05,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:05:05,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 12:05:05,700 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 12:05:05,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 12:05:05,743 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-13 12:05:05,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 12:05:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:05:05,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:05:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:05:08,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:05:08,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304439273] [2022-12-13 12:05:08,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304439273] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:05:08,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:05:08,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 12:05:08,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641434306] [2022-12-13 12:05:08,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:05:08,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:05:08,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:05:08,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:05:08,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:05:10,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:05:20,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 770 [2022-12-13 12:05:20,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 903 flow. Second operand has 10 states, 10 states have (on average 281.4) internal successors, (2814), 10 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:20,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:05:20,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 770 [2022-12-13 12:05:20,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:05:53,454 INFO L130 PetriNetUnfolder]: 65828/82106 cut-off events. [2022-12-13 12:05:53,454 INFO L131 PetriNetUnfolder]: For 2639/2639 co-relation queries the response was YES. [2022-12-13 12:05:53,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167477 conditions, 82106 events. 65828/82106 cut-off events. For 2639/2639 co-relation queries the response was YES. Maximal size of possible extension queue 4935. Compared 456306 event pairs, 30577 based on Foata normal form. 0/27372 useless extension candidates. Maximal degree in co-relation 167452. Up to 25075 conditions per place. [2022-12-13 12:05:53,994 INFO L137 encePairwiseOnDemand]: 758/770 looper letters, 332 selfloop transitions, 62 changer transitions 0/398 dead transitions. [2022-12-13 12:05:53,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 398 transitions, 2399 flow [2022-12-13 12:05:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 12:05:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 12:05:54,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 5408 transitions. [2022-12-13 12:05:54,003 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3901875901875902 [2022-12-13 12:05:54,003 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 5408 transitions. [2022-12-13 12:05:54,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 5408 transitions. [2022-12-13 12:05:54,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:05:54,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 5408 transitions. [2022-12-13 12:05:54,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 300.44444444444446) internal successors, (5408), 18 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:54,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 770.0) internal successors, (14630), 19 states have internal predecessors, (14630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:54,019 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 770.0) internal successors, (14630), 19 states have internal predecessors, (14630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:54,019 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 903 flow. Second operand 18 states and 5408 transitions. [2022-12-13 12:05:54,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 398 transitions, 2399 flow [2022-12-13 12:05:54,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 398 transitions, 2386 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 12:05:54,027 INFO L231 Difference]: Finished difference. Result has 138 places, 137 transitions, 1231 flow [2022-12-13 12:05:54,027 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1231, PETRI_PLACES=138, PETRI_TRANSITIONS=137} [2022-12-13 12:05:54,027 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 57 predicate places. [2022-12-13 12:05:54,027 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 137 transitions, 1231 flow [2022-12-13 12:05:54,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 281.4) internal successors, (2814), 10 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:54,028 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:05:54,028 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:05:54,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-12-13 12:05:54,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:05:54,229 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:05:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:05:54,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1968270714, now seen corresponding path program 1 times [2022-12-13 12:05:54,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:05:54,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132736692] [2022-12-13 12:05:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:05:54,232 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 12:05:54,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:05:54,235 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:05:54,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:05:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:54,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 12:05:54,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:05:54,423 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 12:05:54,423 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 12:05:54,444 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 12:05:54,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 12:05:54,460 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 12:05:54,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 12:05:54,470 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 12:05:54,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:05:54,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:05:54,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132736692] [2022-12-13 12:05:54,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132736692] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:05:54,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:05:54,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:05:54,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608618134] [2022-12-13 12:05:54,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:05:54,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:05:54,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:05:54,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:05:54,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:05:54,662 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 770 [2022-12-13 12:05:54,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 137 transitions, 1231 flow. Second operand has 4 states, 4 states have (on average 299.75) internal successors, (1199), 4 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:54,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:05:54,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 770 [2022-12-13 12:05:54,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:06:01,679 INFO L130 PetriNetUnfolder]: 51405/64183 cut-off events. [2022-12-13 12:06:01,679 INFO L131 PetriNetUnfolder]: For 2316/2316 co-relation queries the response was YES. [2022-12-13 12:06:01,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131170 conditions, 64183 events. 51405/64183 cut-off events. For 2316/2316 co-relation queries the response was YES. Maximal size of possible extension queue 3429. Compared 348985 event pairs, 23613 based on Foata normal form. 2/22749 useless extension candidates. Maximal degree in co-relation 131138. Up to 63680 conditions per place. [2022-12-13 12:06:02,155 INFO L137 encePairwiseOnDemand]: 765/770 looper letters, 109 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2022-12-13 12:06:02,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 124 transitions, 1353 flow [2022-12-13 12:06:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:06:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:06:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1247 transitions. [2022-12-13 12:06:02,158 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4048701298701299 [2022-12-13 12:06:02,159 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1247 transitions. [2022-12-13 12:06:02,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1247 transitions. [2022-12-13 12:06:02,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:06:02,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1247 transitions. [2022-12-13 12:06:02,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 311.75) internal successors, (1247), 4 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:02,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 770.0) internal successors, (3850), 5 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:02,163 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 770.0) internal successors, (3850), 5 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:02,163 INFO L175 Difference]: Start difference. First operand has 138 places, 137 transitions, 1231 flow. Second operand 4 states and 1247 transitions. [2022-12-13 12:06:02,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 124 transitions, 1353 flow [2022-12-13 12:06:02,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 124 transitions, 1338 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 12:06:02,169 INFO L231 Difference]: Finished difference. Result has 135 places, 124 transitions, 1120 flow [2022-12-13 12:06:02,169 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1120, PETRI_PLACES=135, PETRI_TRANSITIONS=124} [2022-12-13 12:06:02,170 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 54 predicate places. [2022-12-13 12:06:02,170 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 124 transitions, 1120 flow [2022-12-13 12:06:02,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 299.75) internal successors, (1199), 4 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:02,170 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:06:02,170 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1] [2022-12-13 12:06:02,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:06:02,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:06:02,372 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:06:02,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:06:02,373 INFO L85 PathProgramCache]: Analyzing trace with hash 447688198, now seen corresponding path program 2 times [2022-12-13 12:06:02,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:06:02,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492537053] [2022-12-13 12:06:02,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:06:02,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 12:06:02,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:06:02,378 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:06:02,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:06:02,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:06:02,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:06:02,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 12:06:02,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:06:02,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 12:06:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:06:02,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:06:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:06:03,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:06:03,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492537053] [2022-12-13 12:06:03,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492537053] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:06:03,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:06:03,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 12:06:03,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681947789] [2022-12-13 12:06:03,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:06:03,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 12:06:03,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:06:03,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 12:06:03,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-13 12:06:09,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 770 [2022-12-13 12:06:09,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 124 transitions, 1120 flow. Second operand has 12 states, 12 states have (on average 293.1666666666667) internal successors, (3518), 12 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:09,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:06:09,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 770 [2022-12-13 12:06:09,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:06:12,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:06:14,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:06:16,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:06:17,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:06:19,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:06:20,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:06:22,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:06:24,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:06:38,765 INFO L130 PetriNetUnfolder]: 92572/115783 cut-off events. [2022-12-13 12:06:38,766 INFO L131 PetriNetUnfolder]: For 4147/4147 co-relation queries the response was YES. [2022-12-13 12:06:39,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236449 conditions, 115783 events. 92572/115783 cut-off events. For 4147/4147 co-relation queries the response was YES. Maximal size of possible extension queue 5683. Compared 660929 event pairs, 42829 based on Foata normal form. 21/41375 useless extension candidates. Maximal degree in co-relation 236415. Up to 37465 conditions per place. [2022-12-13 12:06:39,735 INFO L137 encePairwiseOnDemand]: 760/770 looper letters, 282 selfloop transitions, 70 changer transitions 0/356 dead transitions. [2022-12-13 12:06:39,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 356 transitions, 2644 flow [2022-12-13 12:06:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 12:06:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 12:06:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3526 transitions. [2022-12-13 12:06:39,742 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4162927981109799 [2022-12-13 12:06:39,742 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3526 transitions. [2022-12-13 12:06:39,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3526 transitions. [2022-12-13 12:06:39,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:06:39,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3526 transitions. [2022-12-13 12:06:39,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 320.54545454545456) internal successors, (3526), 11 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:39,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 770.0) internal successors, (9240), 12 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:39,752 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 770.0) internal successors, (9240), 12 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:39,752 INFO L175 Difference]: Start difference. First operand has 135 places, 124 transitions, 1120 flow. Second operand 11 states and 3526 transitions. [2022-12-13 12:06:39,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 356 transitions, 2644 flow [2022-12-13 12:06:39,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 356 transitions, 2520 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 12:06:39,762 INFO L231 Difference]: Finished difference. Result has 145 places, 141 transitions, 1529 flow [2022-12-13 12:06:39,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1529, PETRI_PLACES=145, PETRI_TRANSITIONS=141} [2022-12-13 12:06:39,763 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 64 predicate places. [2022-12-13 12:06:39,763 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 141 transitions, 1529 flow [2022-12-13 12:06:39,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 293.1666666666667) internal successors, (3518), 12 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:39,763 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:06:39,763 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:06:39,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:06:39,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:06:39,965 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:06:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:06:39,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1722471462, now seen corresponding path program 1 times [2022-12-13 12:06:39,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:06:39,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805646663] [2022-12-13 12:06:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:06:39,967 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 12:06:39,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:06:39,970 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:06:39,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:06:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:06:40,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 12:06:40,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:06:40,214 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-12-13 12:06:40,214 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 52 [2022-12-13 12:06:40,243 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 12:06:40,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-12-13 12:06:40,274 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 12:06:40,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-12-13 12:06:40,339 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 12:06:40,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:06:40,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:06:40,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805646663] [2022-12-13 12:06:40,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805646663] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:06:40,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:06:40,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:06:40,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145813138] [2022-12-13 12:06:40,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:06:40,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:06:40,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:06:40,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:06:40,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:06:41,038 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 770 [2022-12-13 12:06:41,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 141 transitions, 1529 flow. Second operand has 6 states, 6 states have (on average 294.5) internal successors, (1767), 6 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:41,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:06:41,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 770 [2022-12-13 12:06:41,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:06:53,554 INFO L130 PetriNetUnfolder]: 90844/113173 cut-off events. [2022-12-13 12:06:53,554 INFO L131 PetriNetUnfolder]: For 4187/4187 co-relation queries the response was YES. [2022-12-13 12:06:54,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231514 conditions, 113173 events. 90844/113173 cut-off events. For 4187/4187 co-relation queries the response was YES. Maximal size of possible extension queue 5334. Compared 637056 event pairs, 41701 based on Foata normal form. 0/40778 useless extension candidates. Maximal degree in co-relation 231476. Up to 112291 conditions per place. [2022-12-13 12:06:54,561 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 134 selfloop transitions, 1 changer transitions 0/139 dead transitions. [2022-12-13 12:06:54,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 139 transitions, 1795 flow [2022-12-13 12:06:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:06:54,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:06:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 931 transitions. [2022-12-13 12:06:54,564 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.403030303030303 [2022-12-13 12:06:54,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 931 transitions. [2022-12-13 12:06:54,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 931 transitions. [2022-12-13 12:06:54,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:06:54,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 931 transitions. [2022-12-13 12:06:54,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.3333333333333) internal successors, (931), 3 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:54,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:54,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:54,568 INFO L175 Difference]: Start difference. First operand has 145 places, 141 transitions, 1529 flow. Second operand 3 states and 931 transitions. [2022-12-13 12:06:54,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 139 transitions, 1795 flow [2022-12-13 12:06:54,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 139 transitions, 1698 flow, removed 19 selfloop flow, removed 3 redundant places. [2022-12-13 12:06:54,624 INFO L231 Difference]: Finished difference. Result has 142 places, 139 transitions, 1430 flow [2022-12-13 12:06:54,624 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1430, PETRI_PLACES=142, PETRI_TRANSITIONS=139} [2022-12-13 12:06:54,625 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 61 predicate places. [2022-12-13 12:06:54,625 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 139 transitions, 1430 flow [2022-12-13 12:06:54,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 294.5) internal successors, (1767), 6 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:54,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:06:54,625 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:06:54,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-12-13 12:06:54,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:06:54,826 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:06:54,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:06:54,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1722471461, now seen corresponding path program 1 times [2022-12-13 12:06:54,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:06:54,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189555363] [2022-12-13 12:06:54,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:06:54,829 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 12:06:54,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:06:54,832 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:06:54,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:06:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:06:55,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 12:06:55,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:06:55,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:06:55,107 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-12-13 12:06:55,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-12-13 12:06:55,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-12-13 12:06:55,226 INFO L321 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-12-13 12:06:55,227 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 3 case distinctions, treesize of input 25 treesize of output 30 [2022-12-13 12:06:55,306 INFO L321 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-12-13 12:06:55,306 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 3 case distinctions, treesize of input 21 treesize of output 26 [2022-12-13 12:06:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:06:55,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:06:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:06:55,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:06:55,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189555363] [2022-12-13 12:06:55,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189555363] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:06:55,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:06:55,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 12:06:55,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768085199] [2022-12-13 12:06:55,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:06:55,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:06:55,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:06:55,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:06:55,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:06:58,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 770 [2022-12-13 12:06:58,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 139 transitions, 1430 flow. Second operand has 10 states, 10 states have (on average 290.8) internal successors, (2908), 10 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:58,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:06:58,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 770 [2022-12-13 12:06:58,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:07:12,496 INFO L130 PetriNetUnfolder]: 86524/107971 cut-off events. [2022-12-13 12:07:12,496 INFO L131 PetriNetUnfolder]: For 4034/4034 co-relation queries the response was YES. [2022-12-13 12:07:13,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220827 conditions, 107971 events. 86524/107971 cut-off events. For 4034/4034 co-relation queries the response was YES. Maximal size of possible extension queue 5338. Compared 606188 event pairs, 40033 based on Foata normal form. 0/39959 useless extension candidates. Maximal degree in co-relation 220789. Up to 90378 conditions per place. [2022-12-13 12:07:13,494 INFO L137 encePairwiseOnDemand]: 762/770 looper letters, 146 selfloop transitions, 24 changer transitions 0/174 dead transitions. [2022-12-13 12:07:13,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 174 transitions, 1848 flow [2022-12-13 12:07:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:07:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:07:13,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2990 transitions. [2022-12-13 12:07:13,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38831168831168833 [2022-12-13 12:07:13,500 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2990 transitions. [2022-12-13 12:07:13,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2990 transitions. [2022-12-13 12:07:13,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:07:13,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2990 transitions. [2022-12-13 12:07:13,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 299.0) internal successors, (2990), 10 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:13,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 770.0) internal successors, (8470), 11 states have internal predecessors, (8470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:13,508 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 770.0) internal successors, (8470), 11 states have internal predecessors, (8470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:13,508 INFO L175 Difference]: Start difference. First operand has 142 places, 139 transitions, 1430 flow. Second operand 10 states and 2990 transitions. [2022-12-13 12:07:13,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 174 transitions, 1848 flow [2022-12-13 12:07:13,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 174 transitions, 1847 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:07:13,578 INFO L231 Difference]: Finished difference. Result has 148 places, 137 transitions, 1473 flow [2022-12-13 12:07:13,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1473, PETRI_PLACES=148, PETRI_TRANSITIONS=137} [2022-12-13 12:07:13,578 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 67 predicate places. [2022-12-13 12:07:13,578 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 137 transitions, 1473 flow [2022-12-13 12:07:13,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 290.8) internal successors, (2908), 10 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:13,579 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:07:13,579 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:07:13,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:13,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:13,780 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:07:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:07:13,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1857017968, now seen corresponding path program 1 times [2022-12-13 12:07:13,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:07:13,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270002794] [2022-12-13 12:07:13,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:07:13,783 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 12:07:13,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:07:13,786 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:13,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:07:13,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:07:13,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:07:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:07:14,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:07:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:07:14,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:07:14,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270002794] [2022-12-13 12:07:14,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270002794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:07:14,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:07:14,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 12:07:14,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683180302] [2022-12-13 12:07:14,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:07:14,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:07:14,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:07:14,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:07:14,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:07:14,920 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 770 [2022-12-13 12:07:14,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 137 transitions, 1473 flow. Second operand has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:14,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:07:14,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 770 [2022-12-13 12:07:14,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:07:25,963 INFO L130 PetriNetUnfolder]: 64975/82852 cut-off events. [2022-12-13 12:07:25,963 INFO L131 PetriNetUnfolder]: For 3721/3721 co-relation queries the response was YES. [2022-12-13 12:07:26,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170213 conditions, 82852 events. 64975/82852 cut-off events. For 3721/3721 co-relation queries the response was YES. Maximal size of possible extension queue 4571. Compared 487206 event pairs, 22715 based on Foata normal form. 0/33531 useless extension candidates. Maximal degree in co-relation 170174. Up to 53212 conditions per place. [2022-12-13 12:07:26,720 INFO L137 encePairwiseOnDemand]: 754/770 looper letters, 200 selfloop transitions, 54 changer transitions 0/257 dead transitions. [2022-12-13 12:07:26,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 257 transitions, 2245 flow [2022-12-13 12:07:26,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:07:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 12:07:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3792 transitions. [2022-12-13 12:07:26,726 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4103896103896104 [2022-12-13 12:07:26,726 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3792 transitions. [2022-12-13 12:07:26,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3792 transitions. [2022-12-13 12:07:26,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:07:26,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3792 transitions. [2022-12-13 12:07:26,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 316.0) internal successors, (3792), 12 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:26,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 770.0) internal successors, (10010), 13 states have internal predecessors, (10010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:26,736 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 770.0) internal successors, (10010), 13 states have internal predecessors, (10010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:26,736 INFO L175 Difference]: Start difference. First operand has 148 places, 137 transitions, 1473 flow. Second operand 12 states and 3792 transitions. [2022-12-13 12:07:26,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 257 transitions, 2245 flow [2022-12-13 12:07:26,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 257 transitions, 2186 flow, removed 4 selfloop flow, removed 8 redundant places. [2022-12-13 12:07:26,868 INFO L231 Difference]: Finished difference. Result has 154 places, 140 transitions, 1582 flow [2022-12-13 12:07:26,868 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1582, PETRI_PLACES=154, PETRI_TRANSITIONS=140} [2022-12-13 12:07:26,868 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 73 predicate places. [2022-12-13 12:07:26,868 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 140 transitions, 1582 flow [2022-12-13 12:07:26,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:26,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:07:26,868 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 12:07:26,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:27,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:27,070 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:07:27,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:07:27,071 INFO L85 PathProgramCache]: Analyzing trace with hash 564049835, now seen corresponding path program 2 times [2022-12-13 12:07:27,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:07:27,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740183124] [2022-12-13 12:07:27,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:07:27,073 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 12:07:27,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:07:27,076 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:27,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:27,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:07:27,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:07:27,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 12:07:27,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:07:27,324 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:07:27,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 12:07:27,416 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 12:07:27,416 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 12:07:27,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:07:27,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 12:07:27,525 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 12:07:27,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 12:07:27,568 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-13 12:07:27,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 12:07:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 12:07:27,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:07:27,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:07:27,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740183124] [2022-12-13 12:07:27,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740183124] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:07:27,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:07:27,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:07:27,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924973740] [2022-12-13 12:07:27,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:07:27,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:07:27,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:07:27,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:07:27,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:07:28,416 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 770 [2022-12-13 12:07:28,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 140 transitions, 1582 flow. Second operand has 5 states, 5 states have (on average 301.4) internal successors, (1507), 5 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:28,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:07:28,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 770 [2022-12-13 12:07:28,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:07:38,463 INFO L130 PetriNetUnfolder]: 68482/85452 cut-off events. [2022-12-13 12:07:38,463 INFO L131 PetriNetUnfolder]: For 15534/18138 co-relation queries the response was YES. [2022-12-13 12:07:39,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205451 conditions, 85452 events. 68482/85452 cut-off events. For 15534/18138 co-relation queries the response was YES. Maximal size of possible extension queue 4805. Compared 482602 event pairs, 31580 based on Foata normal form. 841/36227 useless extension candidates. Maximal degree in co-relation 205410. Up to 84905 conditions per place. [2022-12-13 12:07:39,286 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 119 selfloop transitions, 11 changer transitions 0/136 dead transitions. [2022-12-13 12:07:39,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 136 transitions, 1797 flow [2022-12-13 12:07:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:07:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:07:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1248 transitions. [2022-12-13 12:07:39,289 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4051948051948052 [2022-12-13 12:07:39,289 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1248 transitions. [2022-12-13 12:07:39,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1248 transitions. [2022-12-13 12:07:39,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:07:39,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1248 transitions. [2022-12-13 12:07:39,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:39,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 770.0) internal successors, (3850), 5 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:39,293 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 770.0) internal successors, (3850), 5 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:39,293 INFO L175 Difference]: Start difference. First operand has 154 places, 140 transitions, 1582 flow. Second operand 4 states and 1248 transitions. [2022-12-13 12:07:39,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 136 transitions, 1797 flow [2022-12-13 12:07:39,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 136 transitions, 1721 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 12:07:39,467 INFO L231 Difference]: Finished difference. Result has 150 places, 136 transitions, 1483 flow [2022-12-13 12:07:39,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=1461, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1483, PETRI_PLACES=150, PETRI_TRANSITIONS=136} [2022-12-13 12:07:39,467 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 69 predicate places. [2022-12-13 12:07:39,467 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 136 transitions, 1483 flow [2022-12-13 12:07:39,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 301.4) internal successors, (1507), 5 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:39,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:07:39,467 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:07:39,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 12:07:39,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:39,669 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:07:39,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:07:39,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1732634890, now seen corresponding path program 1 times [2022-12-13 12:07:39,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:07:39,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209012802] [2022-12-13 12:07:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:07:39,672 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 12:07:39,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:07:39,674 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:39,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:07:40,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 12:07:40,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:07:40,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:07:40,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:07:40,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:07:40,083 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 12:07:40,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2022-12-13 12:07:40,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-13 12:07:40,209 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-12-13 12:07:40,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2022-12-13 12:07:40,317 INFO L321 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2022-12-13 12:07:40,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2022-12-13 12:07:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:07:40,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:07:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:07:40,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:07:40,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209012802] [2022-12-13 12:07:40,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209012802] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:07:40,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:07:40,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 12:07:40,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162804584] [2022-12-13 12:07:40,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:07:40,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:07:40,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:07:40,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:07:40,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:07:45,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 770 [2022-12-13 12:07:45,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 136 transitions, 1483 flow. Second operand has 10 states, 10 states have (on average 291.2) internal successors, (2912), 10 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:45,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:07:45,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 770 [2022-12-13 12:07:45,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:07:56,867 INFO L130 PetriNetUnfolder]: 65225/81415 cut-off events. [2022-12-13 12:07:56,867 INFO L131 PetriNetUnfolder]: For 14886/17347 co-relation queries the response was YES. [2022-12-13 12:07:57,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195705 conditions, 81415 events. 65225/81415 cut-off events. For 14886/17347 co-relation queries the response was YES. Maximal size of possible extension queue 4706. Compared 455170 event pairs, 30223 based on Foata normal form. 793/35252 useless extension candidates. Maximal degree in co-relation 195664. Up to 79559 conditions per place. [2022-12-13 12:07:57,624 INFO L137 encePairwiseOnDemand]: 762/770 looper letters, 139 selfloop transitions, 16 changer transitions 0/161 dead transitions. [2022-12-13 12:07:57,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 161 transitions, 1851 flow [2022-12-13 12:07:57,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:07:57,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:07:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2395 transitions. [2022-12-13 12:07:57,629 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3887987012987013 [2022-12-13 12:07:57,629 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2395 transitions. [2022-12-13 12:07:57,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2395 transitions. [2022-12-13 12:07:57,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:07:57,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2395 transitions. [2022-12-13 12:07:57,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 299.375) internal successors, (2395), 8 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:57,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 770.0) internal successors, (6930), 9 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:57,635 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 770.0) internal successors, (6930), 9 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:57,635 INFO L175 Difference]: Start difference. First operand has 150 places, 136 transitions, 1483 flow. Second operand 8 states and 2395 transitions. [2022-12-13 12:07:57,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 161 transitions, 1851 flow [2022-12-13 12:07:57,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 161 transitions, 1839 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:07:57,695 INFO L231 Difference]: Finished difference. Result has 153 places, 134 transitions, 1499 flow [2022-12-13 12:07:57,695 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1499, PETRI_PLACES=153, PETRI_TRANSITIONS=134} [2022-12-13 12:07:57,695 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 72 predicate places. [2022-12-13 12:07:57,695 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 134 transitions, 1499 flow [2022-12-13 12:07:57,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 291.2) internal successors, (2912), 10 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:57,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:07:57,696 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:07:57,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:57,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:57,897 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:07:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:07:57,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1732634888, now seen corresponding path program 1 times [2022-12-13 12:07:57,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:07:57,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660898579] [2022-12-13 12:07:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:07:57,900 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 12:07:57,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:07:57,902 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:57,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:07:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:07:58,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 12:07:58,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:07:58,291 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 12:07:58,292 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 12:07:58,312 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 12:07:58,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-12-13 12:07:58,340 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 12:07:58,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-12-13 12:07:58,446 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 12:07:58,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:07:58,446 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:07:58,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660898579] [2022-12-13 12:07:58,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660898579] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:07:58,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:07:58,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:07:58,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595043897] [2022-12-13 12:07:58,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:07:58,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:07:58,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:07:58,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:07:58,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:07:58,881 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 770 [2022-12-13 12:07:58,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 134 transitions, 1499 flow. Second operand has 6 states, 6 states have (on average 294.8333333333333) internal successors, (1769), 6 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:58,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:07:58,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 770 [2022-12-13 12:07:58,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:08:08,045 INFO L130 PetriNetUnfolder]: 63826/79236 cut-off events. [2022-12-13 12:08:08,045 INFO L131 PetriNetUnfolder]: For 14569/16921 co-relation queries the response was YES. [2022-12-13 12:08:08,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190217 conditions, 79236 events. 63826/79236 cut-off events. For 14569/16921 co-relation queries the response was YES. Maximal size of possible extension queue 4501. Compared 433985 event pairs, 29300 based on Foata normal form. 756/34534 useless extension candidates. Maximal degree in co-relation 190176. Up to 78702 conditions per place. [2022-12-13 12:08:08,808 INFO L137 encePairwiseOnDemand]: 767/770 looper letters, 125 selfloop transitions, 1 changer transitions 0/132 dead transitions. [2022-12-13 12:08:08,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 132 transitions, 1747 flow [2022-12-13 12:08:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:08:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:08:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 924 transitions. [2022-12-13 12:08:08,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4 [2022-12-13 12:08:08,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 924 transitions. [2022-12-13 12:08:08,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 924 transitions. [2022-12-13 12:08:08,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:08:08,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 924 transitions. [2022-12-13 12:08:08,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:08:08,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:08:08,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:08:08,814 INFO L175 Difference]: Start difference. First operand has 153 places, 134 transitions, 1499 flow. Second operand 3 states and 924 transitions. [2022-12-13 12:08:08,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 132 transitions, 1747 flow [2022-12-13 12:08:08,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 132 transitions, 1724 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 12:08:08,966 INFO L231 Difference]: Finished difference. Result has 147 places, 132 transitions, 1474 flow [2022-12-13 12:08:08,966 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1474, PETRI_PLACES=147, PETRI_TRANSITIONS=132} [2022-12-13 12:08:08,966 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 66 predicate places. [2022-12-13 12:08:08,966 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 132 transitions, 1474 flow [2022-12-13 12:08:08,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 294.8333333333333) internal successors, (1769), 6 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:08:08,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:08:08,967 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 12:08:08,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 12:08:09,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:08:09,168 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:08:09,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:08:09,169 INFO L85 PathProgramCache]: Analyzing trace with hash 545360759, now seen corresponding path program 3 times [2022-12-13 12:08:09,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:08:09,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548235831] [2022-12-13 12:08:09,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:08:09,170 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 12:08:09,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:08:09,171 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:08:09,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:08:09,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 12:08:09,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:08:09,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 12:08:09,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:08:09,467 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:08:09,467 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 12:08:09,794 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 12:08:09,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:08:12,519 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 12:08:12,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:08:12,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548235831] [2022-12-13 12:08:12,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548235831] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:08:12,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:08:12,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 12:08:12,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402850838] [2022-12-13 12:08:12,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:08:12,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 12:08:12,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:08:12,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 12:08:12,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 12:08:48,579 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 770 [2022-12-13 12:08:48,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 132 transitions, 1474 flow. Second operand has 24 states, 24 states have (on average 295.0) internal successors, (7080), 24 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:08:48,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:08:48,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 770 [2022-12-13 12:08:48,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:08:54,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:08:56,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:08:58,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:00,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:02,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:04,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:06,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:08,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:10,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:12,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:14,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:16,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:18,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:20,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:22,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:24,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:26,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:28,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:30,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:32,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:09:56,413 INFO L130 PetriNetUnfolder]: 63838/79260 cut-off events. [2022-12-13 12:09:56,413 INFO L131 PetriNetUnfolder]: For 14965/17317 co-relation queries the response was YES. [2022-12-13 12:09:56,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190427 conditions, 79260 events. 63838/79260 cut-off events. For 14965/17317 co-relation queries the response was YES. Maximal size of possible extension queue 4668. Compared 436974 event pairs, 29300 based on Foata normal form. 768/34570 useless extension candidates. Maximal degree in co-relation 190386. Up to 78617 conditions per place. [2022-12-13 12:09:57,155 INFO L137 encePairwiseOnDemand]: 762/770 looper letters, 66 selfloop transitions, 84 changer transitions 0/156 dead transitions. [2022-12-13 12:09:57,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 156 transitions, 2158 flow [2022-12-13 12:09:57,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 12:09:57,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 12:09:57,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 7156 transitions. [2022-12-13 12:09:57,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38722943722943726 [2022-12-13 12:09:57,164 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 7156 transitions. [2022-12-13 12:09:57,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 7156 transitions. [2022-12-13 12:09:57,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:09:57,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 7156 transitions. [2022-12-13 12:09:57,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 298.1666666666667) internal successors, (7156), 24 states have internal predecessors, (7156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:09:57,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 770.0) internal successors, (19250), 25 states have internal predecessors, (19250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:09:57,182 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 770.0) internal successors, (19250), 25 states have internal predecessors, (19250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:09:57,182 INFO L175 Difference]: Start difference. First operand has 147 places, 132 transitions, 1474 flow. Second operand 24 states and 7156 transitions. [2022-12-13 12:09:57,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 156 transitions, 2158 flow [2022-12-13 12:09:57,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 156 transitions, 2157 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:09:57,252 INFO L231 Difference]: Finished difference. Result has 181 places, 156 transitions, 2149 flow [2022-12-13 12:09:57,253 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2149, PETRI_PLACES=181, PETRI_TRANSITIONS=156} [2022-12-13 12:09:57,253 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 100 predicate places. [2022-12-13 12:09:57,253 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 156 transitions, 2149 flow [2022-12-13 12:09:57,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 295.0) internal successors, (7080), 24 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:09:57,254 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:09:57,254 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:09:57,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:09:57,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:09:57,455 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:09:57,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:09:57,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2122884529, now seen corresponding path program 1 times [2022-12-13 12:09:57,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:09:57,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939131790] [2022-12-13 12:09:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:09:57,459 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 12:09:57,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:09:57,462 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:09:57,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:09:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:09:57,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 12:09:57,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:09:57,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 12:09:57,617 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 12:09:57,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:09:57,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:09:57,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939131790] [2022-12-13 12:09:57,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939131790] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:09:57,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:09:57,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:09:57,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520394778] [2022-12-13 12:09:57,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:09:57,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:09:57,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:09:57,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:09:57,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:09:57,887 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 770 [2022-12-13 12:09:57,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 156 transitions, 2149 flow. Second operand has 4 states, 4 states have (on average 308.75) internal successors, (1235), 4 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:09:57,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:09:57,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 770 [2022-12-13 12:09:57,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:10:05,172 INFO L130 PetriNetUnfolder]: 45380/56710 cut-off events. [2022-12-13 12:10:05,173 INFO L131 PetriNetUnfolder]: For 11660/13358 co-relation queries the response was YES. [2022-12-13 12:10:05,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136983 conditions, 56710 events. 45380/56710 cut-off events. For 11660/13358 co-relation queries the response was YES. Maximal size of possible extension queue 3115. Compared 304803 event pairs, 20480 based on Foata normal form. 546/26586 useless extension candidates. Maximal degree in co-relation 136929. Up to 56138 conditions per place. [2022-12-13 12:10:05,783 INFO L137 encePairwiseOnDemand]: 766/770 looper letters, 133 selfloop transitions, 15 changer transitions 0/154 dead transitions. [2022-12-13 12:10:05,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 154 transitions, 2441 flow [2022-12-13 12:10:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:10:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:10:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1267 transitions. [2022-12-13 12:10:05,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4113636363636364 [2022-12-13 12:10:05,787 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1267 transitions. [2022-12-13 12:10:05,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1267 transitions. [2022-12-13 12:10:05,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:10:05,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1267 transitions. [2022-12-13 12:10:05,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 316.75) internal successors, (1267), 4 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:05,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 770.0) internal successors, (3850), 5 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:05,791 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 770.0) internal successors, (3850), 5 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:05,791 INFO L175 Difference]: Start difference. First operand has 181 places, 156 transitions, 2149 flow. Second operand 4 states and 1267 transitions. [2022-12-13 12:10:05,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 154 transitions, 2441 flow [2022-12-13 12:10:05,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 154 transitions, 2242 flow, removed 61 selfloop flow, removed 8 redundant places. [2022-12-13 12:10:05,896 INFO L231 Difference]: Finished difference. Result has 174 places, 154 transitions, 1976 flow [2022-12-13 12:10:05,896 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=1946, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1976, PETRI_PLACES=174, PETRI_TRANSITIONS=154} [2022-12-13 12:10:05,896 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 93 predicate places. [2022-12-13 12:10:05,897 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 154 transitions, 1976 flow [2022-12-13 12:10:05,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 308.75) internal successors, (1235), 4 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:05,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:10:05,897 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:10:05,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-12-13 12:10:06,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:10:06,098 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:10:06,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:10:06,099 INFO L85 PathProgramCache]: Analyzing trace with hash 2122884528, now seen corresponding path program 1 times [2022-12-13 12:10:06,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:10:06,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301008452] [2022-12-13 12:10:06,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:10:06,102 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 12:10:06,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:10:06,105 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:10:06,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:10:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:10:06,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:10:06,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:10:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:10:06,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:10:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:10:06,489 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:10:06,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301008452] [2022-12-13 12:10:06,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301008452] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:10:06,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:10:06,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 12:10:06,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984603198] [2022-12-13 12:10:06,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:10:06,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:10:06,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:10:06,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:10:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:10:07,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 770 [2022-12-13 12:10:07,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 154 transitions, 1976 flow. Second operand has 10 states, 10 states have (on average 302.4) internal successors, (3024), 10 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:07,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:10:07,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 770 [2022-12-13 12:10:07,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:10:14,633 INFO L130 PetriNetUnfolder]: 37145/47713 cut-off events. [2022-12-13 12:10:14,633 INFO L131 PetriNetUnfolder]: For 14896/16393 co-relation queries the response was YES. [2022-12-13 12:10:14,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119070 conditions, 47713 events. 37145/47713 cut-off events. For 14896/16393 co-relation queries the response was YES. Maximal size of possible extension queue 2883. Compared 268954 event pairs, 15283 based on Foata normal form. 285/25600 useless extension candidates. Maximal degree in co-relation 119015. Up to 36802 conditions per place. [2022-12-13 12:10:15,121 INFO L137 encePairwiseOnDemand]: 754/770 looper letters, 166 selfloop transitions, 65 changer transitions 0/236 dead transitions. [2022-12-13 12:10:15,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 236 transitions, 2647 flow [2022-12-13 12:10:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:10:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 12:10:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3748 transitions. [2022-12-13 12:10:15,127 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4056277056277056 [2022-12-13 12:10:15,127 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3748 transitions. [2022-12-13 12:10:15,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3748 transitions. [2022-12-13 12:10:15,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:10:15,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3748 transitions. [2022-12-13 12:10:15,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 312.3333333333333) internal successors, (3748), 12 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:15,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 770.0) internal successors, (10010), 13 states have internal predecessors, (10010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:15,137 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 770.0) internal successors, (10010), 13 states have internal predecessors, (10010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:15,137 INFO L175 Difference]: Start difference. First operand has 174 places, 154 transitions, 1976 flow. Second operand 12 states and 3748 transitions. [2022-12-13 12:10:15,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 236 transitions, 2647 flow [2022-12-13 12:10:15,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 236 transitions, 2631 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:10:15,178 INFO L231 Difference]: Finished difference. Result has 186 places, 157 transitions, 2166 flow [2022-12-13 12:10:15,178 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2166, PETRI_PLACES=186, PETRI_TRANSITIONS=157} [2022-12-13 12:10:15,178 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 105 predicate places. [2022-12-13 12:10:15,178 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 157 transitions, 2166 flow [2022-12-13 12:10:15,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 302.4) internal successors, (3024), 10 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:15,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:10:15,179 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:10:15,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:10:15,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:10:15,380 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:10:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:10:15,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1021707234, now seen corresponding path program 2 times [2022-12-13 12:10:15,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:10:15,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021127403] [2022-12-13 12:10:15,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:10:15,383 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 12:10:15,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:10:15,386 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:10:15,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:10:15,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:10:15,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:10:15,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 12:10:15,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:10:15,630 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:10:15,630 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 12:10:15,726 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 12:10:15,727 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 12:10:15,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:10:15,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 12:10:15,826 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 12:10:15,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 12:10:15,874 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-13 12:10:15,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 12:10:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 12:10:15,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:10:15,951 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:10:15,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021127403] [2022-12-13 12:10:15,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021127403] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:10:15,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:10:15,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:10:15,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832617872] [2022-12-13 12:10:15,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:10:15,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:10:15,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:10:15,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:10:15,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:10:16,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 770 [2022-12-13 12:10:16,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 157 transitions, 2166 flow. Second operand has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:16,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:10:16,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 770 [2022-12-13 12:10:16,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:10:29,045 INFO L130 PetriNetUnfolder]: 70193/90229 cut-off events. [2022-12-13 12:10:29,046 INFO L131 PetriNetUnfolder]: For 34308/37276 co-relation queries the response was YES. [2022-12-13 12:10:29,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257364 conditions, 90229 events. 70193/90229 cut-off events. For 34308/37276 co-relation queries the response was YES. Maximal size of possible extension queue 5358. Compared 564037 event pairs, 19627 based on Foata normal form. 328/50052 useless extension candidates. Maximal degree in co-relation 257306. Up to 50264 conditions per place. [2022-12-13 12:10:30,163 INFO L137 encePairwiseOnDemand]: 764/770 looper letters, 154 selfloop transitions, 28 changer transitions 0/187 dead transitions. [2022-12-13 12:10:30,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 187 transitions, 2629 flow [2022-12-13 12:10:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:10:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:10:30,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1562 transitions. [2022-12-13 12:10:30,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4057142857142857 [2022-12-13 12:10:30,167 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1562 transitions. [2022-12-13 12:10:30,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1562 transitions. [2022-12-13 12:10:30,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:10:30,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1562 transitions. [2022-12-13 12:10:30,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 312.4) internal successors, (1562), 5 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:30,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:30,171 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 770.0) internal successors, (4620), 6 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:30,171 INFO L175 Difference]: Start difference. First operand has 186 places, 157 transitions, 2166 flow. Second operand 5 states and 1562 transitions. [2022-12-13 12:10:30,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 187 transitions, 2629 flow [2022-12-13 12:10:30,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 187 transitions, 2560 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 12:10:30,317 INFO L231 Difference]: Finished difference. Result has 186 places, 159 transitions, 2168 flow [2022-12-13 12:10:30,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2168, PETRI_PLACES=186, PETRI_TRANSITIONS=159} [2022-12-13 12:10:30,317 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 105 predicate places. [2022-12-13 12:10:30,317 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 159 transitions, 2168 flow [2022-12-13 12:10:30,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:30,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:10:30,318 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 2, 1, 1, 1] [2022-12-13 12:10:30,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:10:30,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:10:30,518 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:10:30,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:10:30,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1497920349, now seen corresponding path program 3 times [2022-12-13 12:10:30,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:10:30,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887644696] [2022-12-13 12:10:30,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:10:30,521 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 12:10:30,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:10:30,524 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:10:30,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:10:30,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 12:10:30,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:10:30,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 12:10:30,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:10:30,800 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:10:30,800 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 12:10:30,887 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-13 12:10:30,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-12-13 12:10:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 12:10:31,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:10:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 12:10:31,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:10:31,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887644696] [2022-12-13 12:10:31,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887644696] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:10:31,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:10:31,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 12:10:31,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020626249] [2022-12-13 12:10:31,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:10:31,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 12:10:31,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:10:31,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 12:10:31,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:10:38,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 770 [2022-12-13 12:10:38,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 159 transitions, 2168 flow. Second operand has 14 states, 14 states have (on average 290.14285714285717) internal successors, (4062), 14 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:10:38,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:10:38,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 770 [2022-12-13 12:10:38,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:10:40,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:10:42,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:11:01,073 INFO L130 PetriNetUnfolder]: 74400/94875 cut-off events. [2022-12-13 12:11:01,073 INFO L131 PetriNetUnfolder]: For 58256/64843 co-relation queries the response was YES. [2022-12-13 12:11:02,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285559 conditions, 94875 events. 74400/94875 cut-off events. For 58256/64843 co-relation queries the response was YES. Maximal size of possible extension queue 4876. Compared 575010 event pairs, 37332 based on Foata normal form. 2251/58014 useless extension candidates. Maximal degree in co-relation 285499. Up to 54034 conditions per place. [2022-12-13 12:11:02,358 INFO L137 encePairwiseOnDemand]: 760/770 looper letters, 220 selfloop transitions, 84 changer transitions 0/312 dead transitions. [2022-12-13 12:11:02,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 312 transitions, 3488 flow [2022-12-13 12:11:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 12:11:02,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 12:11:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5120 transitions. [2022-12-13 12:11:02,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39113827349121466 [2022-12-13 12:11:02,364 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5120 transitions. [2022-12-13 12:11:02,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5120 transitions. [2022-12-13 12:11:02,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:11:02,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5120 transitions. [2022-12-13 12:11:02,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 301.1764705882353) internal successors, (5120), 17 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:11:02,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 770.0) internal successors, (13860), 18 states have internal predecessors, (13860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:11:02,377 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 770.0) internal successors, (13860), 18 states have internal predecessors, (13860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:11:02,377 INFO L175 Difference]: Start difference. First operand has 186 places, 159 transitions, 2168 flow. Second operand 17 states and 5120 transitions. [2022-12-13 12:11:02,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 312 transitions, 3488 flow [2022-12-13 12:11:02,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 312 transitions, 3431 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 12:11:02,571 INFO L231 Difference]: Finished difference. Result has 201 places, 174 transitions, 2566 flow [2022-12-13 12:11:02,571 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2566, PETRI_PLACES=201, PETRI_TRANSITIONS=174} [2022-12-13 12:11:02,571 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 120 predicate places. [2022-12-13 12:11:02,571 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 174 transitions, 2566 flow [2022-12-13 12:11:02,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 290.14285714285717) internal successors, (4062), 14 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:11:02,572 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:11:02,572 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:11:02,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-13 12:11:02,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:11:02,773 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:11:02,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:11:02,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1608160451, now seen corresponding path program 1 times [2022-12-13 12:11:02,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:11:02,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726039028] [2022-12-13 12:11:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:11:02,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 12:11:02,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:11:02,779 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:11:02,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:11:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:11:03,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 12:11:03,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:11:03,183 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 12:11:03,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 12:11:03,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 12:11:03,315 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-13 12:11:03,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-12-13 12:11:03,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:11:03,416 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-13 12:11:03,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2022-12-13 12:11:03,431 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 12:11:03,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 12:11:03,563 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 12:11:03,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:11:05,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 12:11:06,245 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 12:11:06,246 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:11:06,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726039028] [2022-12-13 12:11:06,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726039028] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:11:06,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:11:06,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 12:11:06,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743554978] [2022-12-13 12:11:06,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:11:06,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 12:11:06,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:11:06,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 12:11:06,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:11:13,751 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, 1] [2022-12-13 12:11:20,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 12:11:22,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 770 [2022-12-13 12:11:22,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 174 transitions, 2566 flow. Second operand has 14 states, 14 states have (on average 272.7142857142857) internal successors, (3818), 14 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:11:22,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:11:22,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 770 [2022-12-13 12:11:22,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:11:40,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:11:46,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:11:54,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 12:12:03,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:12:09,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:12:44,356 INFO L130 PetriNetUnfolder]: 182406/230069 cut-off events. [2022-12-13 12:12:44,356 INFO L131 PetriNetUnfolder]: For 120229/127732 co-relation queries the response was YES. [2022-12-13 12:12:46,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685476 conditions, 230069 events. 182406/230069 cut-off events. For 120229/127732 co-relation queries the response was YES. Maximal size of possible extension queue 10155. Compared 1480795 event pairs, 53156 based on Foata normal form. 374/131108 useless extension candidates. Maximal degree in co-relation 685414. Up to 58273 conditions per place. [2022-12-13 12:12:47,792 INFO L137 encePairwiseOnDemand]: 754/770 looper letters, 690 selfloop transitions, 164 changer transitions 0/858 dead transitions. [2022-12-13 12:12:47,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 858 transitions, 7370 flow [2022-12-13 12:12:47,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 12:12:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-13 12:12:47,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 13759 transitions. [2022-12-13 12:12:47,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.372267316017316 [2022-12-13 12:12:47,808 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 13759 transitions. [2022-12-13 12:12:47,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 13759 transitions. [2022-12-13 12:12:47,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:12:47,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 13759 transitions. [2022-12-13 12:12:47,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 286.6458333333333) internal successors, (13759), 48 states have internal predecessors, (13759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:47,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 770.0) internal successors, (37730), 49 states have internal predecessors, (37730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:47,844 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 770.0) internal successors, (37730), 49 states have internal predecessors, (37730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:47,845 INFO L175 Difference]: Start difference. First operand has 201 places, 174 transitions, 2566 flow. Second operand 48 states and 13759 transitions. [2022-12-13 12:12:47,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 858 transitions, 7370 flow [2022-12-13 12:12:49,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 858 transitions, 7227 flow, removed 14 selfloop flow, removed 12 redundant places. [2022-12-13 12:12:49,395 INFO L231 Difference]: Finished difference. Result has 252 places, 260 transitions, 3788 flow [2022-12-13 12:12:49,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=2366, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=3788, PETRI_PLACES=252, PETRI_TRANSITIONS=260} [2022-12-13 12:12:49,396 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 171 predicate places. [2022-12-13 12:12:49,396 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 260 transitions, 3788 flow [2022-12-13 12:12:49,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 272.7142857142857) internal successors, (3818), 14 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:12:49,396 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:12:49,397 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 3, 1, 1, 1] [2022-12-13 12:12:49,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:12:49,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:12:49,598 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:12:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:12:49,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1118318071, now seen corresponding path program 4 times [2022-12-13 12:12:49,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:12:49,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758669207] [2022-12-13 12:12:49,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:12:49,601 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 12:12:49,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:12:49,603 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:12:49,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:12:49,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:12:49,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:12:49,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 12:12:49,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:12:49,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 12:12:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:12:50,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:12:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:12:52,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:12:52,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758669207] [2022-12-13 12:12:52,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758669207] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:12:52,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:12:52,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2022-12-13 12:12:52,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839201789] [2022-12-13 12:12:52,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:12:52,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 12:12:52,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:12:52,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 12:12:52,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-12-13 12:13:20,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 770 [2022-12-13 12:13:20,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 260 transitions, 3788 flow. Second operand has 27 states, 27 states have (on average 290.037037037037) internal successors, (7831), 27 states have internal predecessors, (7831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:20,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:13:20,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 770 [2022-12-13 12:13:20,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:13:25,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:13:27,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:13:30,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:13:33,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:13:35,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:13:37,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:14:26,008 INFO L130 PetriNetUnfolder]: 175122/222021 cut-off events. [2022-12-13 12:14:26,008 INFO L131 PetriNetUnfolder]: For 197478/212893 co-relation queries the response was YES. [2022-12-13 12:14:29,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701857 conditions, 222021 events. 175122/222021 cut-off events. For 197478/212893 co-relation queries the response was YES. Maximal size of possible extension queue 9573. Compared 1457553 event pairs, 87320 based on Foata normal form. 3940/133815 useless extension candidates. Maximal degree in co-relation 701784. Up to 56764 conditions per place. [2022-12-13 12:14:29,913 INFO L137 encePairwiseOnDemand]: 760/770 looper letters, 570 selfloop transitions, 142 changer transitions 0/730 dead transitions. [2022-12-13 12:14:29,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 730 transitions, 7384 flow [2022-12-13 12:14:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 12:14:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 12:14:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 9757 transitions. [2022-12-13 12:14:29,926 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39598214285714284 [2022-12-13 12:14:29,926 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 9757 transitions. [2022-12-13 12:14:29,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 9757 transitions. [2022-12-13 12:14:29,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:14:29,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 9757 transitions. [2022-12-13 12:14:29,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 304.90625) internal successors, (9757), 32 states have internal predecessors, (9757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:29,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 770.0) internal successors, (25410), 33 states have internal predecessors, (25410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:29,949 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 770.0) internal successors, (25410), 33 states have internal predecessors, (25410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:29,949 INFO L175 Difference]: Start difference. First operand has 252 places, 260 transitions, 3788 flow. Second operand 32 states and 9757 transitions. [2022-12-13 12:14:29,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 730 transitions, 7384 flow [2022-12-13 12:14:31,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 730 transitions, 6768 flow, removed 71 selfloop flow, removed 18 redundant places. [2022-12-13 12:14:31,677 INFO L231 Difference]: Finished difference. Result has 269 places, 273 transitions, 3775 flow [2022-12-13 12:14:31,677 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3775, PETRI_PLACES=269, PETRI_TRANSITIONS=273} [2022-12-13 12:14:31,678 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 188 predicate places. [2022-12-13 12:14:31,678 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 273 transitions, 3775 flow [2022-12-13 12:14:31,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 290.037037037037) internal successors, (7831), 27 states have internal predecessors, (7831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:31,678 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:14:31,678 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:14:31,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:14:31,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:14:31,880 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 12:14:31,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:14:31,881 INFO L85 PathProgramCache]: Analyzing trace with hash -8024275, now seen corresponding path program 1 times [2022-12-13 12:14:31,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:14:31,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646926189] [2022-12-13 12:14:31,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:14:31,882 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 12:14:31,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:14:31,885 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:14:31,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09a13bf7-770b-4b98-9f02-47cf9da25338/bin/uautomizer-uyxdKDjOR8/mathsat -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 12:14:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:14:32,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:14:32,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:14:32,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 12:14:32,224 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 12:14:32,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:14:32,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:14:32,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646926189] [2022-12-13 12:14:32,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646926189] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:14:32,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:14:32,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:14:32,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953838327] [2022-12-13 12:14:32,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:14:32,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:14:32,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:14:32,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:14:32,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:14:32,897 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 770 [2022-12-13 12:14:32,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 273 transitions, 3775 flow. Second operand has 6 states, 6 states have (on average 308.3333333333333) internal successors, (1850), 6 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:14:32,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:14:32,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 770 [2022-12-13 12:14:32,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand