./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R --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 f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --- 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-38b53e6 [2022-11-25 15:52:35,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:52:35,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:52:35,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:52:35,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:52:36,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:52:36,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:52:36,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:52:36,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:52:36,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:52:36,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:52:36,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:52:36,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:52:36,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:52:36,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:52:36,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:52:36,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:52:36,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:52:36,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:52:36,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:52:36,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:52:36,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:52:36,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:52:36,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:52:36,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:52:36,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:52:36,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:52:36,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:52:36,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:52:36,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:52:36,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:52:36,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:52:36,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:52:36,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:52:36,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:52:36,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:52:36,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:52:36,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:52:36,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:52:36,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:52:36,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:52:36,076 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 15:52:36,129 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:52:36,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:52:36,130 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:52:36,130 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:52:36,131 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:52:36,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:52:36,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:52:36,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:52:36,135 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:52:36,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:52:36,136 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:52:36,136 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:52:36,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:52:36,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:52:36,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:52:36,137 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 15:52:36,138 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 15:52:36,138 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 15:52:36,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:52:36,138 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 15:52:36,139 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:52:36,139 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:52:36,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:52:36,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:52:36,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:52:36,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:52:36,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:52:36,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:52:36,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:52:36,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:52:36,142 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:52:36,143 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:52:36,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:52:36,143 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_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 [2022-11-25 15:52:36,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:52:36,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:52:36,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:52:36,541 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:52:36,542 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:52:36,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2022-11-25 15:52:39,704 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:52:40,052 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:52:40,053 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2022-11-25 15:52:40,065 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/data/d1cb77bbe/bb3a03fc4f634779a5bcb3ba200bda2f/FLAG09f7dd0ab [2022-11-25 15:52:40,082 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/data/d1cb77bbe/bb3a03fc4f634779a5bcb3ba200bda2f [2022-11-25 15:52:40,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:52:40,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:52:40,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:52:40,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:52:40,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:52:40,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:52:40" (1/1) ... [2022-11-25 15:52:40,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28928a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:40, skipping insertion in model container [2022-11-25 15:52:40,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:52:40" (1/1) ... [2022-11-25 15:52:40,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:52:40,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:52:40,351 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:40,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:40,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:40,360 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:40,365 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:40,368 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:40,369 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:40,372 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:40,373 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:40,374 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:40,374 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:40,383 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:40,384 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:40,385 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:40,397 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_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2022-11-25 15:52:40,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:52:40,423 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-25 15:52:40,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@bc94ca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:40, skipping insertion in model container [2022-11-25 15:52:40,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:52:40,424 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 15:52:40,425 INFO L158 Benchmark]: Toolchain (without parser) took 337.97ms. Allocated memory is still 184.5MB. Free memory was 151.4MB in the beginning and 140.1MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 15:52:40,426 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 127.9MB. Free memory was 93.1MB in the beginning and 93.1MB in the end (delta: 23.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 15:52:40,427 INFO L158 Benchmark]: CACSL2BoogieTranslator took 335.07ms. Allocated memory is still 184.5MB. Free memory was 150.6MB in the beginning and 140.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 15:52:40,429 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 127.9MB. Free memory was 93.1MB in the beginning and 93.1MB in the end (delta: 23.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 335.07ms. Allocated memory is still 184.5MB. Free memory was 150.6MB in the beginning and 140.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 125]: 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_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R --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 f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --- 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-38b53e6 [2022-11-25 15:52:42,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:52:42,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:52:42,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:52:42,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:52:42,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:52:42,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:52:42,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:52:42,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:52:42,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:52:42,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:52:42,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:52:42,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:52:42,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:52:43,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:52:43,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:52:43,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:52:43,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:52:43,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:52:43,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:52:43,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:52:43,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:52:43,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:52:43,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:52:43,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:52:43,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:52:43,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:52:43,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:52:43,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:52:43,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:52:43,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:52:43,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:52:43,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:52:43,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:52:43,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:52:43,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:52:43,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:52:43,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:52:43,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:52:43,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:52:43,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:52:43,044 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 15:52:43,085 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:52:43,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:52:43,087 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:52:43,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:52:43,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:52:43,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:52:43,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:52:43,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:52:43,090 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:52:43,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:52:43,092 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:52:43,092 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:52:43,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:52:43,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:52:43,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:52:43,093 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 15:52:43,093 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 15:52:43,094 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 15:52:43,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:52:43,094 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 15:52:43,095 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 15:52:43,095 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 15:52:43,095 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:52:43,095 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:52:43,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:52:43,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:52:43,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:52:43,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:52:43,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:52:43,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:52:43,097 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 15:52:43,098 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 15:52:43,098 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:52:43,098 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:52:43,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:52:43,099 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 15:52:43,099 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_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 [2022-11-25 15:52:43,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:52:43,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:52:43,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:52:43,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:52:43,644 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:52:43,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2022-11-25 15:52:46,888 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:52:47,253 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:52:47,254 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2022-11-25 15:52:47,266 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/data/1831735bf/00719583f3434944a1a065bd74a1022d/FLAG7ac56eb6f [2022-11-25 15:52:47,299 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/data/1831735bf/00719583f3434944a1a065bd74a1022d [2022-11-25 15:52:47,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:52:47,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:52:47,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:52:47,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:52:47,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:52:47,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:52:47" (1/1) ... [2022-11-25 15:52:47,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2326bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:47, skipping insertion in model container [2022-11-25 15:52:47,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:52:47" (1/1) ... [2022-11-25 15:52:47,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:52:47,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:52:47,601 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,604 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,606 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,610 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,615 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,618 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,618 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,622 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,622 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,623 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,623 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,632 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,633 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,634 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,650 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_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2022-11-25 15:52:47,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:52:47,697 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 15:52:47,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:52:47,718 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,719 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,719 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,721 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,722 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,722 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,728 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,731 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,731 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,732 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,732 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,733 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,735 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,736 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,750 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_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2022-11-25 15:52:47,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:52:47,775 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:52:47,801 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,801 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,802 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,805 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,807 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,807 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,808 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,812 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,813 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,818 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,818 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,826 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,827 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:52:47,828 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:52:47,832 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_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2022-11-25 15:52:47,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:52:47,862 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:52:47,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:47 WrapperNode [2022-11-25 15:52:47,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:52:47,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:52:47,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:52:47,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:52:47,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:47" (1/1) ... [2022-11-25 15:52:47,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:47" (1/1) ... [2022-11-25 15:52:47,913 INFO L138 Inliner]: procedures = 27, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 162 [2022-11-25 15:52:47,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:52:47,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:52:47,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:52:47,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:52:47,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:47" (1/1) ... [2022-11-25 15:52:47,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:47" (1/1) ... [2022-11-25 15:52:47,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:47" (1/1) ... [2022-11-25 15:52:47,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:47" (1/1) ... [2022-11-25 15:52:47,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:47" (1/1) ... [2022-11-25 15:52:47,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:47" (1/1) ... [2022-11-25 15:52:47,948 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:47" (1/1) ... [2022-11-25 15:52:47,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:47" (1/1) ... [2022-11-25 15:52:47,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:52:47,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:52:47,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:52:47,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:52:47,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:47" (1/1) ... [2022-11-25 15:52:47,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:52:47,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:52:48,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:52:48,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:52:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:52:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 15:52:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:52:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 15:52:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 15:52:48,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 15:52:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 15:52:48,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 15:52:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 15:52:48,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 15:52:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 15:52:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 15:52:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:52:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:52:48,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:52:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:52:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 15:52:48,102 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:52:48,292 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:52:48,295 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:52:48,878 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:52:49,094 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:52:49,094 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 15:52:49,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:52:49 BoogieIcfgContainer [2022-11-25 15:52:49,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:52:49,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:52:49,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:52:49,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:52:49,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:52:47" (1/3) ... [2022-11-25 15:52:49,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fe2f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:52:49, skipping insertion in model container [2022-11-25 15:52:49,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:47" (2/3) ... [2022-11-25 15:52:49,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fe2f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:52:49, skipping insertion in model container [2022-11-25 15:52:49,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:52:49" (3/3) ... [2022-11-25 15:52:49,107 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2022-11-25 15:52:49,154 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:52:49,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-25 15:52:49,154 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:52:49,269 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 15:52:49,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 174 transitions, 372 flow [2022-11-25 15:52:49,449 INFO L130 PetriNetUnfolder]: 11/171 cut-off events. [2022-11-25 15:52:49,454 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:52:49,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 171 events. 11/171 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 153 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 131. Up to 3 conditions per place. [2022-11-25 15:52:49,461 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 174 transitions, 372 flow [2022-11-25 15:52:49,477 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 166 transitions, 350 flow [2022-11-25 15:52:49,484 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:52:49,520 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 166 transitions, 350 flow [2022-11-25 15:52:49,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 166 transitions, 350 flow [2022-11-25 15:52:49,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 166 transitions, 350 flow [2022-11-25 15:52:49,612 INFO L130 PetriNetUnfolder]: 11/166 cut-off events. [2022-11-25 15:52:49,613 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:52:49,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 166 events. 11/166 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 152 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 131. Up to 3 conditions per place. [2022-11-25 15:52:49,619 INFO L119 LiptonReduction]: Number of co-enabled transitions 1674 [2022-11-25 15:53:15,721 INFO L134 LiptonReduction]: Checked pairs total: 3423 [2022-11-25 15:53:15,722 INFO L136 LiptonReduction]: Total number of compositions: 172 [2022-11-25 15:53:15,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:53:15,747 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;@451357df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:53:15,747 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2022-11-25 15:53:15,750 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 15:53:15,751 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:53:15,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:15,752 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 15:53:15,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:15,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:15,758 INFO L85 PathProgramCache]: Analyzing trace with hash 22595, now seen corresponding path program 1 times [2022-11-25 15:53:15,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:15,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474081032] [2022-11-25 15:53:15,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:15,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:15,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:15,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:15,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 15:53:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:53:15,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:53:15,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:16,241 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 15:53:16,242 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 [2022-11-25 15:53:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:16,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:53:16,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:16,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474081032] [2022-11-25 15:53:16,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474081032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:53:16,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:53:16,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:53:16,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819921204] [2022-11-25 15:53:16,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:53:16,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:53:16,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:16,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:53:16,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:53:16,500 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 346 [2022-11-25 15:53:16,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:16,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:16,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 346 [2022-11-25 15:53:16,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:17,035 INFO L130 PetriNetUnfolder]: 1210/1759 cut-off events. [2022-11-25 15:53:17,035 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2022-11-25 15:53:17,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3563 conditions, 1759 events. 1210/1759 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 8217 event pairs, 878 based on Foata normal form. 0/808 useless extension candidates. Maximal degree in co-relation 3275. Up to 1698 conditions per place. [2022-11-25 15:53:17,054 INFO L137 encePairwiseOnDemand]: 343/346 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-11-25 15:53:17,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 180 flow [2022-11-25 15:53:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:53:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:53:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2022-11-25 15:53:17,071 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.464354527938343 [2022-11-25 15:53:17,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2022-11-25 15:53:17,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2022-11-25 15:53:17,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:53:17,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2022-11-25 15:53:17,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:17,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:17,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:17,094 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 106 flow. Second operand 3 states and 482 transitions. [2022-11-25 15:53:17,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 180 flow [2022-11-25 15:53:17,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 15:53:17,101 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 92 flow [2022-11-25 15:53:17,104 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2022-11-25 15:53:17,108 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2022-11-25 15:53:17,108 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 92 flow [2022-11-25 15:53:17,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:17,109 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:17,109 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 15:53:17,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:17,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:17,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:17,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:17,334 INFO L85 PathProgramCache]: Analyzing trace with hash 22596, now seen corresponding path program 1 times [2022-11-25 15:53:17,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:17,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119817314] [2022-11-25 15:53:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:17,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:17,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:17,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:17,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 15:53:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:53:17,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 15:53:17,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:17,739 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 15:53:17,739 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 [2022-11-25 15:53:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:17,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:53:17,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:17,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119817314] [2022-11-25 15:53:17,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119817314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:53:17,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:53:17,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:53:17,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689550775] [2022-11-25 15:53:17,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:53:17,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:53:17,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:17,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:53:17,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:53:18,029 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 346 [2022-11-25 15:53:18,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:18,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:18,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 346 [2022-11-25 15:53:18,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:18,906 INFO L130 PetriNetUnfolder]: 2419/3516 cut-off events. [2022-11-25 15:53:18,907 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 15:53:18,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7000 conditions, 3516 events. 2419/3516 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 18852 event pairs, 1756 based on Foata normal form. 0/1615 useless extension candidates. Maximal degree in co-relation 6994. Up to 1699 conditions per place. [2022-11-25 15:53:18,933 INFO L137 encePairwiseOnDemand]: 343/346 looper letters, 74 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2022-11-25 15:53:18,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 79 transitions, 324 flow [2022-11-25 15:53:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:53:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:53:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2022-11-25 15:53:18,938 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49903660886319845 [2022-11-25 15:53:18,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2022-11-25 15:53:18,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2022-11-25 15:53:18,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:53:18,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2022-11-25 15:53:18,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:18,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:18,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:18,946 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 92 flow. Second operand 3 states and 518 transitions. [2022-11-25 15:53:18,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 79 transitions, 324 flow [2022-11-25 15:53:18,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 79 transitions, 323 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:53:18,949 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 103 flow [2022-11-25 15:53:18,949 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2022-11-25 15:53:18,950 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2022-11-25 15:53:18,950 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 103 flow [2022-11-25 15:53:18,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:18,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:18,952 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 15:53:18,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:19,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:19,165 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:19,165 INFO L85 PathProgramCache]: Analyzing trace with hash 22724, now seen corresponding path program 1 times [2022-11-25 15:53:19,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:19,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827112511] [2022-11-25 15:53:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:19,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:19,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:19,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:19,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 15:53:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:53:19,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 15:53:19,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:19,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:19,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:19,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:19,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:19,427 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 15:53:19,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-25 15:53:19,472 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 15:53:19,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-25 15:53:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:19,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:53:19,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:19,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827112511] [2022-11-25 15:53:19,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827112511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:53:19,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:53:19,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:53:19,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342933269] [2022-11-25 15:53:19,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:53:19,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:53:19,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:19,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:53:19,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:53:19,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 346 [2022-11-25 15:53:19,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:19,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:19,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 346 [2022-11-25 15:53:19,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:20,530 INFO L130 PetriNetUnfolder]: 2011/2962 cut-off events. [2022-11-25 15:53:20,530 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 15:53:20,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5898 conditions, 2962 events. 2011/2962 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 15653 event pairs, 1444 based on Foata normal form. 0/1425 useless extension candidates. Maximal degree in co-relation 5890. Up to 2840 conditions per place. [2022-11-25 15:53:20,551 INFO L137 encePairwiseOnDemand]: 343/346 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2022-11-25 15:53:20,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 41 transitions, 175 flow [2022-11-25 15:53:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:53:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:53:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2022-11-25 15:53:20,554 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4653179190751445 [2022-11-25 15:53:20,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2022-11-25 15:53:20,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2022-11-25 15:53:20,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:53:20,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2022-11-25 15:53:20,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:20,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:20,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:20,561 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 103 flow. Second operand 3 states and 483 transitions. [2022-11-25 15:53:20,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 41 transitions, 175 flow [2022-11-25 15:53:20,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 41 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:53:20,564 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 99 flow [2022-11-25 15:53:20,565 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2022-11-25 15:53:20,566 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2022-11-25 15:53:20,567 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 99 flow [2022-11-25 15:53:20,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:20,568 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:20,568 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 15:53:20,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:20,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:20,781 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:20,782 INFO L85 PathProgramCache]: Analyzing trace with hash 22723, now seen corresponding path program 1 times [2022-11-25 15:53:20,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:20,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030551691] [2022-11-25 15:53:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:20,783 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 [2022-11-25 15:53:20,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:20,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:20,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 15:53:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:53:20,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:53:20,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:20,992 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-25 15:53:20,993 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 51 [2022-11-25 15:53:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:21,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:53:21,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:21,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030551691] [2022-11-25 15:53:21,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030551691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:53:21,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:53:21,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:53:21,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661566149] [2022-11-25 15:53:21,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:53:21,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:53:21,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:21,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:53:21,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:53:21,260 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 346 [2022-11-25 15:53:21,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:21,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:21,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 346 [2022-11-25 15:53:21,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:21,801 INFO L130 PetriNetUnfolder]: 1603/2408 cut-off events. [2022-11-25 15:53:21,801 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 15:53:21,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4790 conditions, 2408 events. 1603/2408 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 12678 event pairs, 1132 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 4781. Up to 2286 conditions per place. [2022-11-25 15:53:21,849 INFO L137 encePairwiseOnDemand]: 343/346 looper letters, 35 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2022-11-25 15:53:21,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 167 flow [2022-11-25 15:53:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:53:21,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:53:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2022-11-25 15:53:21,852 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4605009633911368 [2022-11-25 15:53:21,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2022-11-25 15:53:21,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2022-11-25 15:53:21,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:53:21,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2022-11-25 15:53:21,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:21,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:21,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:21,859 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 99 flow. Second operand 3 states and 478 transitions. [2022-11-25 15:53:21,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 167 flow [2022-11-25 15:53:21,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:53:21,861 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 96 flow [2022-11-25 15:53:21,861 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2022-11-25 15:53:21,862 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2022-11-25 15:53:21,862 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 96 flow [2022-11-25 15:53:21,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:21,863 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:21,863 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:53:21,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:22,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:22,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:22,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:22,077 INFO L85 PathProgramCache]: Analyzing trace with hash 704131, now seen corresponding path program 1 times [2022-11-25 15:53:22,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:22,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488566415] [2022-11-25 15:53:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:22,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:22,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:22,081 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:22,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 15:53:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:53:22,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 15:53:22,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:22,325 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 15:53:22,326 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 [2022-11-25 15:53:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:22,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:53:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:22,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:22,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488566415] [2022-11-25 15:53:22,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488566415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:53:22,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:53:22,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 15:53:22,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386470033] [2022-11-25 15:53:22,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:53:22,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:53:22,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:22,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:53:22,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:53:23,857 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 346 [2022-11-25 15:53:23,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 96 flow. Second operand has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:23,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:23,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 346 [2022-11-25 15:53:23,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:25,106 INFO L130 PetriNetUnfolder]: 2406/3615 cut-off events. [2022-11-25 15:53:25,107 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-25 15:53:25,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7190 conditions, 3615 events. 2406/3615 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 20300 event pairs, 1698 based on Foata normal form. 0/1853 useless extension candidates. Maximal degree in co-relation 7180. Up to 1144 conditions per place. [2022-11-25 15:53:25,135 INFO L137 encePairwiseOnDemand]: 342/346 looper letters, 98 selfloop transitions, 7 changer transitions 0/108 dead transitions. [2022-11-25 15:53:25,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 108 transitions, 462 flow [2022-11-25 15:53:25,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:53:25,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:53:25,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 960 transitions. [2022-11-25 15:53:25,139 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4624277456647399 [2022-11-25 15:53:25,140 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 960 transitions. [2022-11-25 15:53:25,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 960 transitions. [2022-11-25 15:53:25,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:53:25,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 960 transitions. [2022-11-25 15:53:25,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:25,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 346.0) internal successors, (2422), 7 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:25,149 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 346.0) internal successors, (2422), 7 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:25,149 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 96 flow. Second operand 6 states and 960 transitions. [2022-11-25 15:53:25,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 108 transitions, 462 flow [2022-11-25 15:53:25,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 108 transitions, 461 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:53:25,155 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 149 flow [2022-11-25 15:53:25,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2022-11-25 15:53:25,159 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2022-11-25 15:53:25,159 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 149 flow [2022-11-25 15:53:25,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:25,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:25,160 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:53:25,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 15:53:25,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:25,373 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:25,373 INFO L85 PathProgramCache]: Analyzing trace with hash 21852181, now seen corresponding path program 1 times [2022-11-25 15:53:25,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:25,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124236256] [2022-11-25 15:53:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:25,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:25,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:25,379 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:25,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 15:53:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:53:25,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:53:25,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:25,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:25,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:25,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:25,617 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 15:53:25,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-25 15:53:25,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-25 15:53:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:25,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:53:25,719 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:25,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124236256] [2022-11-25 15:53:25,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124236256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:53:25,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:53:25,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:53:25,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122763425] [2022-11-25 15:53:25,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:53:25,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:53:25,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:25,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:53:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:53:25,910 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 346 [2022-11-25 15:53:25,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:25,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:25,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 346 [2022-11-25 15:53:25,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:26,526 INFO L130 PetriNetUnfolder]: 2334/3489 cut-off events. [2022-11-25 15:53:26,526 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-25 15:53:26,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6964 conditions, 3489 events. 2334/3489 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 19400 event pairs, 1638 based on Foata normal form. 0/1815 useless extension candidates. Maximal degree in co-relation 6949. Up to 3306 conditions per place. [2022-11-25 15:53:26,549 INFO L137 encePairwiseOnDemand]: 343/346 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-11-25 15:53:26,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 223 flow [2022-11-25 15:53:26,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:53:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:53:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2022-11-25 15:53:26,552 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4614643545279383 [2022-11-25 15:53:26,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2022-11-25 15:53:26,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2022-11-25 15:53:26,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:53:26,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2022-11-25 15:53:26,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:26,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:26,558 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:26,558 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 149 flow. Second operand 3 states and 479 transitions. [2022-11-25 15:53:26,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 223 flow [2022-11-25 15:53:26,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 42 transitions, 213 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 15:53:26,560 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 137 flow [2022-11-25 15:53:26,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2022-11-25 15:53:26,562 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2022-11-25 15:53:26,562 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 137 flow [2022-11-25 15:53:26,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:26,563 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:26,563 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:53:26,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:26,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:26,780 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:26,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:26,781 INFO L85 PathProgramCache]: Analyzing trace with hash 21852180, now seen corresponding path program 1 times [2022-11-25 15:53:26,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:26,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601384030] [2022-11-25 15:53:26,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:26,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:26,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:26,783 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:26,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 15:53:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:53:26,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:53:26,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:26,986 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-25 15:53:26,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-25 15:53:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:27,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:53:27,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:27,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601384030] [2022-11-25 15:53:27,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601384030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:53:27,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:53:27,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:53:27,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866267709] [2022-11-25 15:53:27,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:53:27,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:53:27,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:27,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:53:27,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:53:27,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 346 [2022-11-25 15:53:27,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:27,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:27,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 346 [2022-11-25 15:53:27,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:27,985 INFO L130 PetriNetUnfolder]: 2262/3363 cut-off events. [2022-11-25 15:53:27,985 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-25 15:53:27,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6709 conditions, 3363 events. 2262/3363 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 18588 event pairs, 1578 based on Foata normal form. 0/1776 useless extension candidates. Maximal degree in co-relation 6693. Up to 3180 conditions per place. [2022-11-25 15:53:28,008 INFO L137 encePairwiseOnDemand]: 343/346 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-11-25 15:53:28,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 207 flow [2022-11-25 15:53:28,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:53:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:53:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2022-11-25 15:53:28,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45664739884393063 [2022-11-25 15:53:28,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2022-11-25 15:53:28,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2022-11-25 15:53:28,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:53:28,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2022-11-25 15:53:28,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:28,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:28,018 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:28,018 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 137 flow. Second operand 3 states and 474 transitions. [2022-11-25 15:53:28,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 207 flow [2022-11-25 15:53:28,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 40 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:53:28,023 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 134 flow [2022-11-25 15:53:28,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2022-11-25 15:53:28,024 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2022-11-25 15:53:28,024 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 134 flow [2022-11-25 15:53:28,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:28,025 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:28,025 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:53:28,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:28,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:28,238 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:28,239 INFO L85 PathProgramCache]: Analyzing trace with hash 677412653, now seen corresponding path program 1 times [2022-11-25 15:53:28,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:28,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533410683] [2022-11-25 15:53:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:28,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:28,241 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:28,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 15:53:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:53:28,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 15:53:28,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:28,454 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 15:53:28,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 15:53:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:28,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:53:28,508 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:28,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533410683] [2022-11-25 15:53:28,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533410683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:53:28,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:53:28,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:53:28,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006018309] [2022-11-25 15:53:28,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:53:28,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:53:28,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:28,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:53:28,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:53:28,722 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 346 [2022-11-25 15:53:28,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:28,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:28,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 346 [2022-11-25 15:53:28,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:29,209 INFO L130 PetriNetUnfolder]: 1524/2328 cut-off events. [2022-11-25 15:53:29,209 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-25 15:53:29,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4634 conditions, 2328 events. 1524/2328 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 12314 event pairs, 1074 based on Foata normal form. 0/1404 useless extension candidates. Maximal degree in co-relation 4617. Up to 2168 conditions per place. [2022-11-25 15:53:29,222 INFO L137 encePairwiseOnDemand]: 342/346 looper letters, 31 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2022-11-25 15:53:29,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 38 transitions, 200 flow [2022-11-25 15:53:29,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:53:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:53:29,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2022-11-25 15:53:29,225 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44147398843930635 [2022-11-25 15:53:29,226 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2022-11-25 15:53:29,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2022-11-25 15:53:29,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:53:29,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2022-11-25 15:53:29,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:29,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 346.0) internal successors, (1730), 5 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:29,232 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 346.0) internal successors, (1730), 5 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:29,232 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 134 flow. Second operand 4 states and 611 transitions. [2022-11-25 15:53:29,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 38 transitions, 200 flow [2022-11-25 15:53:29,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:53:29,234 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 137 flow [2022-11-25 15:53:29,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2022-11-25 15:53:29,235 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2022-11-25 15:53:29,235 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 137 flow [2022-11-25 15:53:29,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:29,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:29,236 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:53:29,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:29,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:29,449 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:29,450 INFO L85 PathProgramCache]: Analyzing trace with hash 677412654, now seen corresponding path program 1 times [2022-11-25 15:53:29,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:29,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164080019] [2022-11-25 15:53:29,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:29,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:29,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:29,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:29,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 15:53:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:53:29,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:53:29,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:29,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:53:29,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:29,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164080019] [2022-11-25 15:53:29,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164080019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:53:29,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:53:29,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:53:29,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124063225] [2022-11-25 15:53:29,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:53:29,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:53:29,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:29,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:53:29,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:53:29,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 346 [2022-11-25 15:53:29,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:29,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:29,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 346 [2022-11-25 15:53:29,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:30,264 INFO L130 PetriNetUnfolder]: 1136/1776 cut-off events. [2022-11-25 15:53:30,265 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-11-25 15:53:30,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3568 conditions, 1776 events. 1136/1776 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 9159 event pairs, 835 based on Foata normal form. 26/1138 useless extension candidates. Maximal degree in co-relation 3550. Up to 1453 conditions per place. [2022-11-25 15:53:30,279 INFO L137 encePairwiseOnDemand]: 339/346 looper letters, 54 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2022-11-25 15:53:30,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 307 flow [2022-11-25 15:53:30,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:53:30,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:53:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 648 transitions. [2022-11-25 15:53:30,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4682080924855491 [2022-11-25 15:53:30,283 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 648 transitions. [2022-11-25 15:53:30,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 648 transitions. [2022-11-25 15:53:30,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:53:30,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 648 transitions. [2022-11-25 15:53:30,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:30,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 346.0) internal successors, (1730), 5 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:30,289 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 346.0) internal successors, (1730), 5 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:30,289 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 137 flow. Second operand 4 states and 648 transitions. [2022-11-25 15:53:30,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 307 flow [2022-11-25 15:53:30,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:53:30,293 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 159 flow [2022-11-25 15:53:30,294 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2022-11-25 15:53:30,295 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2022-11-25 15:53:30,295 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 159 flow [2022-11-25 15:53:30,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:30,296 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:30,296 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:53:30,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:30,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:30,518 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:30,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:30,519 INFO L85 PathProgramCache]: Analyzing trace with hash -474873305, now seen corresponding path program 1 times [2022-11-25 15:53:30,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:30,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520003360] [2022-11-25 15:53:30,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:30,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:30,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:30,521 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:30,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 15:53:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:53:30,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:53:30,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:30,766 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-11-25 15:53:30,766 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 46 [2022-11-25 15:53:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:30,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:53:30,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:30,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520003360] [2022-11-25 15:53:30,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520003360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:53:30,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:53:30,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:53:30,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821622842] [2022-11-25 15:53:30,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:53:30,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:53:30,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:30,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:53:30,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:53:30,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 346 [2022-11-25 15:53:30,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:30,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:30,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 346 [2022-11-25 15:53:30,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:31,273 INFO L130 PetriNetUnfolder]: 1031/1626 cut-off events. [2022-11-25 15:53:31,273 INFO L131 PetriNetUnfolder]: For 184/184 co-relation queries the response was YES. [2022-11-25 15:53:31,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3612 conditions, 1626 events. 1031/1626 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 8267 event pairs, 740 based on Foata normal form. 0/1314 useless extension candidates. Maximal degree in co-relation 3592. Up to 1483 conditions per place. [2022-11-25 15:53:31,285 INFO L137 encePairwiseOnDemand]: 343/346 looper letters, 33 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2022-11-25 15:53:31,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 37 transitions, 223 flow [2022-11-25 15:53:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:53:31,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:53:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2022-11-25 15:53:31,288 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4441233140655106 [2022-11-25 15:53:31,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2022-11-25 15:53:31,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2022-11-25 15:53:31,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:53:31,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2022-11-25 15:53:31,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:31,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:31,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:31,293 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 159 flow. Second operand 3 states and 461 transitions. [2022-11-25 15:53:31,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 37 transitions, 223 flow [2022-11-25 15:53:31,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 37 transitions, 213 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 15:53:31,296 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 147 flow [2022-11-25 15:53:31,296 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2022-11-25 15:53:31,297 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2022-11-25 15:53:31,297 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 147 flow [2022-11-25 15:53:31,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:31,298 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:31,298 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:53:31,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:31,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:31,511 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:31,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:31,512 INFO L85 PathProgramCache]: Analyzing trace with hash -474873304, now seen corresponding path program 1 times [2022-11-25 15:53:31,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:31,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230984356] [2022-11-25 15:53:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:31,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:31,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:31,513 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:31,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 15:53:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:53:31,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 15:53:31,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:31,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:31,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:31,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:31,757 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 15:53:31,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-25 15:53:31,772 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 [2022-11-25 15:53:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:31,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:53:31,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:31,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230984356] [2022-11-25 15:53:31,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230984356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:53:31,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:53:31,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:53:31,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565717540] [2022-11-25 15:53:31,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:53:31,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:53:31,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:31,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:53:31,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:53:31,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 346 [2022-11-25 15:53:31,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:31,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:31,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 346 [2022-11-25 15:53:31,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:32,247 INFO L130 PetriNetUnfolder]: 896/1416 cut-off events. [2022-11-25 15:53:32,247 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-11-25 15:53:32,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3158 conditions, 1416 events. 896/1416 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7037 event pairs, 645 based on Foata normal form. 0/1202 useless extension candidates. Maximal degree in co-relation 3138. Up to 1293 conditions per place. [2022-11-25 15:53:32,254 INFO L137 encePairwiseOnDemand]: 343/346 looper letters, 31 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2022-11-25 15:53:32,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 35 transitions, 207 flow [2022-11-25 15:53:32,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:53:32,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:53:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2022-11-25 15:53:32,257 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45375722543352603 [2022-11-25 15:53:32,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2022-11-25 15:53:32,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2022-11-25 15:53:32,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:53:32,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2022-11-25 15:53:32,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:32,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:32,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:32,263 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 147 flow. Second operand 3 states and 471 transitions. [2022-11-25 15:53:32,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 35 transitions, 207 flow [2022-11-25 15:53:32,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 35 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:53:32,265 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 144 flow [2022-11-25 15:53:32,266 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2022-11-25 15:53:32,266 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2022-11-25 15:53:32,266 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 144 flow [2022-11-25 15:53:32,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:32,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:32,267 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:53:32,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 15:53:32,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:32,481 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:32,481 INFO L85 PathProgramCache]: Analyzing trace with hash -493814641, now seen corresponding path program 1 times [2022-11-25 15:53:32,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:32,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711844772] [2022-11-25 15:53:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:32,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:32,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:32,484 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:32,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 15:53:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:53:32,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 15:53:32,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:32,759 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 15:53:32,760 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 [2022-11-25 15:53:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:32,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:53:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:33,911 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:33,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711844772] [2022-11-25 15:53:33,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711844772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:53:33,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:53:33,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 15:53:33,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209128766] [2022-11-25 15:53:33,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:53:33,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 15:53:33,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:53:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:53:37,452 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 346 [2022-11-25 15:53:37,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 144 flow. Second operand has 8 states, 8 states have (on average 139.25) internal successors, (1114), 8 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:37,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:37,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 346 [2022-11-25 15:53:37,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:42,550 INFO L130 PetriNetUnfolder]: 950/1516 cut-off events. [2022-11-25 15:53:42,551 INFO L131 PetriNetUnfolder]: For 299/299 co-relation queries the response was YES. [2022-11-25 15:53:42,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3356 conditions, 1516 events. 950/1516 cut-off events. For 299/299 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7487 event pairs, 713 based on Foata normal form. 102/1399 useless extension candidates. Maximal degree in co-relation 3335. Up to 559 conditions per place. [2022-11-25 15:53:42,560 INFO L137 encePairwiseOnDemand]: 340/346 looper letters, 77 selfloop transitions, 10 changer transitions 1/91 dead transitions. [2022-11-25 15:53:42,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 91 transitions, 465 flow [2022-11-25 15:53:42,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:53:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:53:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1334 transitions. [2022-11-25 15:53:42,568 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42838792549775206 [2022-11-25 15:53:42,568 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1334 transitions. [2022-11-25 15:53:42,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1334 transitions. [2022-11-25 15:53:42,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:53:42,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1334 transitions. [2022-11-25 15:53:42,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 148.22222222222223) internal successors, (1334), 9 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:42,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 346.0) internal successors, (3460), 10 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:42,583 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 346.0) internal successors, (3460), 10 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:42,584 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 144 flow. Second operand 9 states and 1334 transitions. [2022-11-25 15:53:42,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 91 transitions, 465 flow [2022-11-25 15:53:42,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 91 transitions, 464 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:53:42,587 INFO L231 Difference]: Finished difference. Result has 60 places, 36 transitions, 183 flow [2022-11-25 15:53:42,588 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=183, PETRI_PLACES=60, PETRI_TRANSITIONS=36} [2022-11-25 15:53:42,588 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2022-11-25 15:53:42,589 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 36 transitions, 183 flow [2022-11-25 15:53:42,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 139.25) internal successors, (1114), 8 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:42,590 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:42,590 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 15:53:42,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:42,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:42,805 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:42,805 INFO L85 PathProgramCache]: Analyzing trace with hash -494440444, now seen corresponding path program 2 times [2022-11-25 15:53:42,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:42,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581224804] [2022-11-25 15:53:42,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:53:42,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:42,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:42,808 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:42,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 15:53:42,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:53:42,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:53:42,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 15:53:42,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:43,142 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 15:53:43,142 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 [2022-11-25 15:53:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:43,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:53:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:44,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:44,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581224804] [2022-11-25 15:53:44,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581224804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:53:44,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:53:44,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 15:53:44,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996332097] [2022-11-25 15:53:44,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:53:44,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:53:44,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:44,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:53:44,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:53:48,552 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 346 [2022-11-25 15:53:48,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 36 transitions, 183 flow. Second operand has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:48,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:48,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 346 [2022-11-25 15:53:48,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:53,982 INFO L130 PetriNetUnfolder]: 3110/4831 cut-off events. [2022-11-25 15:53:53,982 INFO L131 PetriNetUnfolder]: For 3450/3450 co-relation queries the response was YES. [2022-11-25 15:53:53,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12057 conditions, 4831 events. 3110/4831 cut-off events. For 3450/3450 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 27487 event pairs, 2265 based on Foata normal form. 6/4286 useless extension candidates. Maximal degree in co-relation 12033. Up to 1141 conditions per place. [2022-11-25 15:53:54,014 INFO L137 encePairwiseOnDemand]: 342/346 looper letters, 211 selfloop transitions, 12 changer transitions 1/227 dead transitions. [2022-11-25 15:53:54,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 227 transitions, 1213 flow [2022-11-25 15:53:54,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:53:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 15:53:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1946 transitions. [2022-11-25 15:53:54,022 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4686897880539499 [2022-11-25 15:53:54,022 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1946 transitions. [2022-11-25 15:53:54,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1946 transitions. [2022-11-25 15:53:54,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:53:54,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1946 transitions. [2022-11-25 15:53:54,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 162.16666666666666) internal successors, (1946), 12 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:54,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 346.0) internal successors, (4498), 13 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:54,039 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 346.0) internal successors, (4498), 13 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:54,040 INFO L175 Difference]: Start difference. First operand has 60 places, 36 transitions, 183 flow. Second operand 12 states and 1946 transitions. [2022-11-25 15:53:54,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 227 transitions, 1213 flow [2022-11-25 15:53:54,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 227 transitions, 1157 flow, removed 10 selfloop flow, removed 8 redundant places. [2022-11-25 15:53:54,049 INFO L231 Difference]: Finished difference. Result has 70 places, 43 transitions, 236 flow [2022-11-25 15:53:54,050 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=236, PETRI_PLACES=70, PETRI_TRANSITIONS=43} [2022-11-25 15:53:54,050 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 19 predicate places. [2022-11-25 15:53:54,051 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 43 transitions, 236 flow [2022-11-25 15:53:54,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:54,052 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:54,052 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-25 15:53:54,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:54,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:54,266 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:54,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1866813294, now seen corresponding path program 2 times [2022-11-25 15:53:54,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:54,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26516610] [2022-11-25 15:53:54,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:53:54,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:54,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:54,270 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:54,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 15:53:54,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:53:54,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:53:54,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 15:53:54,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:54,591 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 15:53:54,592 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 [2022-11-25 15:53:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:53:54,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:53:54,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:54,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26516610] [2022-11-25 15:53:54,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26516610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:53:54,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:53:54,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:53:54,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833395266] [2022-11-25 15:53:54,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:53:54,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:53:54,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:54,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:53:54,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:53:55,053 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 346 [2022-11-25 15:53:55,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 43 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:55,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:53:55,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 346 [2022-11-25 15:53:55,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:53:55,717 INFO L130 PetriNetUnfolder]: 2318/3769 cut-off events. [2022-11-25 15:53:55,717 INFO L131 PetriNetUnfolder]: For 2591/2591 co-relation queries the response was YES. [2022-11-25 15:53:55,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7876 conditions, 3769 events. 2318/3769 cut-off events. For 2591/2591 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21499 event pairs, 1641 based on Foata normal form. 474/3764 useless extension candidates. Maximal degree in co-relation 7848. Up to 3314 conditions per place. [2022-11-25 15:53:55,738 INFO L137 encePairwiseOnDemand]: 342/346 looper letters, 31 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2022-11-25 15:53:55,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 41 transitions, 296 flow [2022-11-25 15:53:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:53:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:53:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2022-11-25 15:53:55,741 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4342485549132948 [2022-11-25 15:53:55,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2022-11-25 15:53:55,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2022-11-25 15:53:55,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:53:55,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2022-11-25 15:53:55,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:55,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 346.0) internal successors, (1730), 5 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:55,747 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 346.0) internal successors, (1730), 5 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:55,747 INFO L175 Difference]: Start difference. First operand has 70 places, 43 transitions, 236 flow. Second operand 4 states and 601 transitions. [2022-11-25 15:53:55,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 41 transitions, 296 flow [2022-11-25 15:53:55,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 41 transitions, 271 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-11-25 15:53:55,752 INFO L231 Difference]: Finished difference. Result has 65 places, 41 transitions, 209 flow [2022-11-25 15:53:55,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=65, PETRI_TRANSITIONS=41} [2022-11-25 15:53:55,753 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2022-11-25 15:53:55,753 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 41 transitions, 209 flow [2022-11-25 15:53:55,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:55,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:53:55,754 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-25 15:53:55,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:55,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:55,968 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:53:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:55,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1538494372, now seen corresponding path program 3 times [2022-11-25 15:53:55,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:55,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264651784] [2022-11-25 15:53:55,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:53:55,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:55,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:55,971 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:56,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 15:53:56,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 15:53:56,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:53:56,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 15:53:56,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:56,419 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 15:53:56,419 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 [2022-11-25 15:53:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:57,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:54:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:54:00,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:54:00,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264651784] [2022-11-25 15:54:00,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264651784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:54:00,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:54:00,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-25 15:54:00,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229381350] [2022-11-25 15:54:00,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:54:00,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 15:54:00,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:54:00,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 15:54:00,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-25 15:54:18,600 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 346 [2022-11-25 15:54:18,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 41 transitions, 209 flow. Second operand has 24 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:18,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:54:18,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 346 [2022-11-25 15:54:18,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:54:44,789 INFO L130 PetriNetUnfolder]: 5030/8053 cut-off events. [2022-11-25 15:54:44,790 INFO L131 PetriNetUnfolder]: For 1431/1431 co-relation queries the response was YES. [2022-11-25 15:54:44,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17332 conditions, 8053 events. 5030/8053 cut-off events. For 1431/1431 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 47092 event pairs, 3705 based on Foata normal form. 12/6974 useless extension candidates. Maximal degree in co-relation 17305. Up to 1135 conditions per place. [2022-11-25 15:54:44,828 INFO L137 encePairwiseOnDemand]: 342/346 looper letters, 439 selfloop transitions, 24 changer transitions 1/467 dead transitions. [2022-11-25 15:54:44,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 467 transitions, 2386 flow [2022-11-25 15:54:44,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 15:54:44,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 15:54:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3908 transitions. [2022-11-25 15:54:44,842 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.470616570327553 [2022-11-25 15:54:44,842 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3908 transitions. [2022-11-25 15:54:44,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3908 transitions. [2022-11-25 15:54:44,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:54:44,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3908 transitions. [2022-11-25 15:54:44,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 162.83333333333334) internal successors, (3908), 24 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:44,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 346.0) internal successors, (8650), 25 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:44,871 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 346.0) internal successors, (8650), 25 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:44,871 INFO L175 Difference]: Start difference. First operand has 65 places, 41 transitions, 209 flow. Second operand 24 states and 3908 transitions. [2022-11-25 15:54:44,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 467 transitions, 2386 flow [2022-11-25 15:54:44,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 467 transitions, 2361 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:54:44,883 INFO L231 Difference]: Finished difference. Result has 99 places, 54 transitions, 387 flow [2022-11-25 15:54:44,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=387, PETRI_PLACES=99, PETRI_TRANSITIONS=54} [2022-11-25 15:54:44,884 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 48 predicate places. [2022-11-25 15:54:44,884 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 54 transitions, 387 flow [2022-11-25 15:54:44,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:44,886 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:54:44,886 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:54:44,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 15:54:45,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:54:45,099 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:54:45,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:54:45,099 INFO L85 PathProgramCache]: Analyzing trace with hash 357717376, now seen corresponding path program 1 times [2022-11-25 15:54:45,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:54:45,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217726107] [2022-11-25 15:54:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:54:45,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:54:45,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:54:45,101 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:54:45,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 15:54:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:54:45,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:54:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:54:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:54:45,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:54:45,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:54:45,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217726107] [2022-11-25 15:54:45,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217726107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:54:45,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:54:45,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:54:45,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81120377] [2022-11-25 15:54:45,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:54:45,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:54:45,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:54:45,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:54:45,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:54:45,285 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 346 [2022-11-25 15:54:45,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 54 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:45,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:54:45,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 346 [2022-11-25 15:54:45,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:54:46,437 INFO L130 PetriNetUnfolder]: 5044/8395 cut-off events. [2022-11-25 15:54:46,437 INFO L131 PetriNetUnfolder]: For 1034/1034 co-relation queries the response was YES. [2022-11-25 15:54:46,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18129 conditions, 8395 events. 5044/8395 cut-off events. For 1034/1034 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 53573 event pairs, 304 based on Foata normal form. 610/7916 useless extension candidates. Maximal degree in co-relation 18089. Up to 2744 conditions per place. [2022-11-25 15:54:46,480 INFO L137 encePairwiseOnDemand]: 341/346 looper letters, 73 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2022-11-25 15:54:46,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 80 transitions, 609 flow [2022-11-25 15:54:46,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:54:46,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:54:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 792 transitions. [2022-11-25 15:54:46,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4578034682080925 [2022-11-25 15:54:46,484 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 792 transitions. [2022-11-25 15:54:46,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 792 transitions. [2022-11-25 15:54:46,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:54:46,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 792 transitions. [2022-11-25 15:54:46,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:46,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 346.0) internal successors, (2076), 6 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:46,531 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 346.0) internal successors, (2076), 6 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:46,531 INFO L175 Difference]: Start difference. First operand has 99 places, 54 transitions, 387 flow. Second operand 5 states and 792 transitions. [2022-11-25 15:54:46,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 80 transitions, 609 flow [2022-11-25 15:54:46,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 80 transitions, 558 flow, removed 13 selfloop flow, removed 11 redundant places. [2022-11-25 15:54:46,541 INFO L231 Difference]: Finished difference. Result has 95 places, 57 transitions, 367 flow [2022-11-25 15:54:46,541 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=367, PETRI_PLACES=95, PETRI_TRANSITIONS=57} [2022-11-25 15:54:46,542 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 44 predicate places. [2022-11-25 15:54:46,542 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 57 transitions, 367 flow [2022-11-25 15:54:46,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:46,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:54:46,543 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:54:46,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 15:54:46,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:54:46,756 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:54:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:54:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash -865798922, now seen corresponding path program 2 times [2022-11-25 15:54:46,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:54:46,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656856753] [2022-11-25 15:54:46,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:54:46,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:54:46,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:54:46,758 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:54:46,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 15:54:46,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:54:46,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:54:46,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 15:54:46,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:54:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:54:47,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:54:47,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:54:47,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656856753] [2022-11-25 15:54:47,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656856753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:54:47,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:54:47,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:54:47,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194033525] [2022-11-25 15:54:47,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:54:47,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:54:47,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:54:47,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:54:47,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:54:47,081 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 346 [2022-11-25 15:54:47,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 57 transitions, 367 flow. Second operand has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:47,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:54:47,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 346 [2022-11-25 15:54:47,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:54:49,550 INFO L130 PetriNetUnfolder]: 10639/16343 cut-off events. [2022-11-25 15:54:49,550 INFO L131 PetriNetUnfolder]: For 5553/5553 co-relation queries the response was YES. [2022-11-25 15:54:49,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40474 conditions, 16343 events. 10639/16343 cut-off events. For 5553/5553 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 102613 event pairs, 739 based on Foata normal form. 408/14435 useless extension candidates. Maximal degree in co-relation 40430. Up to 5960 conditions per place. [2022-11-25 15:54:49,641 INFO L137 encePairwiseOnDemand]: 339/346 looper letters, 77 selfloop transitions, 11 changer transitions 5/94 dead transitions. [2022-11-25 15:54:49,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 94 transitions, 655 flow [2022-11-25 15:54:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:54:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:54:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1073 transitions. [2022-11-25 15:54:49,646 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4430222956234517 [2022-11-25 15:54:49,647 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1073 transitions. [2022-11-25 15:54:49,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1073 transitions. [2022-11-25 15:54:49,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:54:49,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1073 transitions. [2022-11-25 15:54:49,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.28571428571428) internal successors, (1073), 7 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:49,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 346.0) internal successors, (2768), 8 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:49,656 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 346.0) internal successors, (2768), 8 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:49,656 INFO L175 Difference]: Start difference. First operand has 95 places, 57 transitions, 367 flow. Second operand 7 states and 1073 transitions. [2022-11-25 15:54:49,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 94 transitions, 655 flow [2022-11-25 15:54:49,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 651 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:54:49,666 INFO L231 Difference]: Finished difference. Result has 102 places, 55 transitions, 383 flow [2022-11-25 15:54:49,666 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=102, PETRI_TRANSITIONS=55} [2022-11-25 15:54:49,667 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 51 predicate places. [2022-11-25 15:54:49,667 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 55 transitions, 383 flow [2022-11-25 15:54:49,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:49,668 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:54:49,668 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:54:49,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 15:54:49,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:54:49,880 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:54:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:54:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1252469383, now seen corresponding path program 1 times [2022-11-25 15:54:49,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:54:49,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207011578] [2022-11-25 15:54:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:54:49,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:54:49,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:54:49,883 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:54:49,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 15:54:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:54:50,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:54:50,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:54:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:54:50,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:54:50,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:54:50,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207011578] [2022-11-25 15:54:50,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207011578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:54:50,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:54:50,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:54:50,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547037115] [2022-11-25 15:54:50,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:54:50,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:54:50,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:54:50,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:54:50,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:54:50,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 346 [2022-11-25 15:54:50,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 55 transitions, 383 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:50,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:54:50,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 346 [2022-11-25 15:54:50,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:54:51,433 INFO L130 PetriNetUnfolder]: 4083/7667 cut-off events. [2022-11-25 15:54:51,433 INFO L131 PetriNetUnfolder]: For 11235/11235 co-relation queries the response was YES. [2022-11-25 15:54:51,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21802 conditions, 7667 events. 4083/7667 cut-off events. For 11235/11235 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 53664 event pairs, 1740 based on Foata normal form. 280/7087 useless extension candidates. Maximal degree in co-relation 21755. Up to 5261 conditions per place. [2022-11-25 15:54:51,482 INFO L137 encePairwiseOnDemand]: 343/346 looper letters, 56 selfloop transitions, 2 changer transitions 3/66 dead transitions. [2022-11-25 15:54:51,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 66 transitions, 539 flow [2022-11-25 15:54:51,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:54:51,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:54:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2022-11-25 15:54:51,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46724470134874757 [2022-11-25 15:54:51,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2022-11-25 15:54:51,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2022-11-25 15:54:51,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:54:51,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2022-11-25 15:54:51,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:51,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:51,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:51,489 INFO L175 Difference]: Start difference. First operand has 102 places, 55 transitions, 383 flow. Second operand 3 states and 485 transitions. [2022-11-25 15:54:51,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 66 transitions, 539 flow [2022-11-25 15:54:51,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 66 transitions, 507 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-11-25 15:54:51,535 INFO L231 Difference]: Finished difference. Result has 95 places, 56 transitions, 369 flow [2022-11-25 15:54:51,535 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=369, PETRI_PLACES=95, PETRI_TRANSITIONS=56} [2022-11-25 15:54:51,536 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 44 predicate places. [2022-11-25 15:54:51,536 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 56 transitions, 369 flow [2022-11-25 15:54:51,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:54:51,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:54:51,537 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2022-11-25 15:54:51,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 15:54:51,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:54:51,754 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:54:51,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:54:51,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1003169508, now seen corresponding path program 4 times [2022-11-25 15:54:51,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:54:51,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852578792] [2022-11-25 15:54:51,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:54:51,755 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:54:51,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:54:51,756 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:54:51,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 15:54:51,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:54:51,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:54:51,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 15:54:51,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:54:52,139 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 15:54:52,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 15:54:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:54:53,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:55:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:55:06,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:55:06,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852578792] [2022-11-25 15:55:06,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852578792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:55:06,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:55:06,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2022-11-25 15:55:06,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656924606] [2022-11-25 15:55:06,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:55:06,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-25 15:55:06,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:55:06,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-25 15:55:06,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 15:56:30,726 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 346 [2022-11-25 15:56:30,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 56 transitions, 369 flow. Second operand has 48 states, 48 states have (on average 144.0) internal successors, (6912), 48 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:56:30,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:56:30,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 346 [2022-11-25 15:56:30,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:57:04,189 WARN L233 SmtUtils]: Spent 21.69s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:57:16,412 WARN L233 SmtUtils]: Spent 10.30s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:57:29,729 WARN L233 SmtUtils]: Spent 11.30s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:57:45,977 WARN L233 SmtUtils]: Spent 14.07s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:57:59,847 WARN L233 SmtUtils]: Spent 11.70s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:58:10,260 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:58:20,026 WARN L233 SmtUtils]: Spent 7.37s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:58:29,817 WARN L233 SmtUtils]: Spent 7.11s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:58:37,712 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:58:45,642 WARN L233 SmtUtils]: Spent 5.56s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:59:33,013 INFO L130 PetriNetUnfolder]: 9182/17240 cut-off events. [2022-11-25 15:59:33,013 INFO L131 PetriNetUnfolder]: For 22245/22245 co-relation queries the response was YES. [2022-11-25 15:59:33,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47722 conditions, 17240 events. 9182/17240 cut-off events. For 22245/22245 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 124086 event pairs, 7110 based on Foata normal form. 24/15409 useless extension candidates. Maximal degree in co-relation 47677. Up to 3691 conditions per place. [2022-11-25 15:59:33,127 INFO L137 encePairwiseOnDemand]: 342/346 looper letters, 947 selfloop transitions, 48 changer transitions 0/1000 dead transitions. [2022-11-25 15:59:33,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 1000 transitions, 6056 flow [2022-11-25 15:59:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 15:59:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-25 15:59:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 7838 transitions. [2022-11-25 15:59:33,146 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4719412331406551 [2022-11-25 15:59:33,146 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 7838 transitions. [2022-11-25 15:59:33,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 7838 transitions. [2022-11-25 15:59:33,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:59:33,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 7838 transitions. [2022-11-25 15:59:33,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 163.29166666666666) internal successors, (7838), 48 states have internal predecessors, (7838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:59:33,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 346.0) internal successors, (16954), 49 states have internal predecessors, (16954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:59:33,186 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 346.0) internal successors, (16954), 49 states have internal predecessors, (16954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:59:33,186 INFO L175 Difference]: Start difference. First operand has 95 places, 56 transitions, 369 flow. Second operand 48 states and 7838 transitions. [2022-11-25 15:59:33,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 1000 transitions, 6056 flow [2022-11-25 15:59:33,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 1000 transitions, 5740 flow, removed 135 selfloop flow, removed 2 redundant places. [2022-11-25 15:59:33,321 INFO L231 Difference]: Finished difference. Result has 165 places, 81 transitions, 718 flow [2022-11-25 15:59:33,321 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=718, PETRI_PLACES=165, PETRI_TRANSITIONS=81} [2022-11-25 15:59:33,322 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 114 predicate places. [2022-11-25 15:59:33,322 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 81 transitions, 718 flow [2022-11-25 15:59:33,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 144.0) internal successors, (6912), 48 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:59:33,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:59:33,324 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:59:33,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-25 15:59:33,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:59:33,547 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 15:59:33,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:59:33,547 INFO L85 PathProgramCache]: Analyzing trace with hash 655454129, now seen corresponding path program 1 times [2022-11-25 15:59:33,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:59:33,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471392505] [2022-11-25 15:59:33,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:59:33,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:59:33,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:59:33,548 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:59:33,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 15:59:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:59:33,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 15:59:33,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:59:33,778 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 [2022-11-25 15:59:34,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-25 15:59:34,594 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:59:34,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-25 15:59:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:59:34,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:59:35,342 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_704 (Array (_ BitVec 32) (_ BitVec 8)))) (bvsle (bvadd c_~d~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_704) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1))))) c_~W~0)) is different from false [2022-11-25 15:59:35,821 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-25 15:59:35,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 117 [2022-11-25 15:59:35,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:59:35,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 11 [2022-11-25 15:59:42,746 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 117 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:59:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:59:45,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:59:45,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471392505] [2022-11-25 15:59:45,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471392505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:59:45,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:59:45,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-25 15:59:45,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769988641] [2022-11-25 15:59:45,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:59:45,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 15:59:45,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:59:45,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 15:59:45,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=424, Unknown=2, NotChecked=42, Total=552 [2022-11-25 15:59:46,279 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 346 [2022-11-25 15:59:46,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 81 transitions, 718 flow. Second operand has 24 states, 24 states have (on average 107.83333333333333) internal successors, (2588), 24 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:59:46,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:59:46,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 346 [2022-11-25 15:59:46,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:59:49,431 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 [] [2022-11-25 15:59:55,682 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 [] [2022-11-25 16:00:02,540 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 87 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 16:00:18,991 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 89 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 16:00:39,109 INFO L130 PetriNetUnfolder]: 41492/69395 cut-off events. [2022-11-25 16:00:39,109 INFO L131 PetriNetUnfolder]: For 39368/39368 co-relation queries the response was YES. [2022-11-25 16:00:39,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184398 conditions, 69395 events. 41492/69395 cut-off events. For 39368/39368 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 532941 event pairs, 540 based on Foata normal form. 1440/65750 useless extension candidates. Maximal degree in co-relation 184328. Up to 15976 conditions per place. [2022-11-25 16:00:39,670 INFO L137 encePairwiseOnDemand]: 328/346 looper letters, 232 selfloop transitions, 123 changer transitions 17/372 dead transitions. [2022-11-25 16:00:39,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 372 transitions, 2309 flow [2022-11-25 16:00:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-25 16:00:39,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-25 16:00:39,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4981 transitions. [2022-11-25 16:00:39,677 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32718076720966893 [2022-11-25 16:00:39,677 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4981 transitions. [2022-11-25 16:00:39,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4981 transitions. [2022-11-25 16:00:39,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:00:39,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4981 transitions. [2022-11-25 16:00:39,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 113.20454545454545) internal successors, (4981), 44 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:00:39,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 346.0) internal successors, (15570), 45 states have internal predecessors, (15570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:00:39,701 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 346.0) internal successors, (15570), 45 states have internal predecessors, (15570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:00:39,701 INFO L175 Difference]: Start difference. First operand has 165 places, 81 transitions, 718 flow. Second operand 44 states and 4981 transitions. [2022-11-25 16:00:39,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 372 transitions, 2309 flow [2022-11-25 16:00:40,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 372 transitions, 2213 flow, removed 25 selfloop flow, removed 22 redundant places. [2022-11-25 16:00:40,758 INFO L231 Difference]: Finished difference. Result has 207 places, 209 transitions, 1544 flow [2022-11-25 16:00:40,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1544, PETRI_PLACES=207, PETRI_TRANSITIONS=209} [2022-11-25 16:00:40,759 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 156 predicate places. [2022-11-25 16:00:40,759 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 209 transitions, 1544 flow [2022-11-25 16:00:40,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.83333333333333) internal successors, (2588), 24 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:00:40,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:00:40,760 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:00:40,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 16:00:40,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 16:00:40,973 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 16:00:40,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:00:40,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1067196517, now seen corresponding path program 2 times [2022-11-25 16:00:40,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 16:00:40,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357075808] [2022-11-25 16:00:40,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:00:40,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 16:00:40,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 16:00:40,974 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 16:00:40,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 16:00:41,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:00:41,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:00:41,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 16:00:41,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:00:41,248 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 [2022-11-25 16:00:42,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:00:42,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-25 16:00:42,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-25 16:00:43,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:00:43,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-25 16:00:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:00:43,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:00:44,173 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_746 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_745 (Array (_ BitVec 32) (_ BitVec 8)))) (bvsle (bvadd c_~d~0 (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_745) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_746) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1))))) c_~W~0)) is different from false [2022-11-25 16:00:44,750 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-25 16:00:44,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 235 treesize of output 213 [2022-11-25 16:00:44,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:00:44,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 101 [2022-11-25 16:00:44,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:00:44,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 36 [2022-11-25 16:01:04,460 WARN L233 SmtUtils]: Spent 18.06s on a formula simplification. DAG size of input: 142 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 16:01:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:01:10,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 16:01:10,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357075808] [2022-11-25 16:01:10,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357075808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:01:10,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:01:10,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-25 16:01:10,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219459555] [2022-11-25 16:01:10,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:01:10,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 16:01:10,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 16:01:10,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 16:01:10,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=413, Unknown=7, NotChecked=42, Total=552 [2022-11-25 16:01:11,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 346 [2022-11-25 16:01:11,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 209 transitions, 1544 flow. Second operand has 24 states, 24 states have (on average 103.08333333333333) internal successors, (2474), 24 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:01:11,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:01:11,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 346 [2022-11-25 16:01:11,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:01:15,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:01:17,024 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] [2022-11-25 16:01:45,712 WARN L233 SmtUtils]: Spent 24.49s on a formula simplification. DAG size of input: 125 DAG size of output: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 16:01:56,391 WARN L233 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 109 DAG size of output: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 16:02:21,476 WARN L233 SmtUtils]: Spent 7.16s on a formula simplification. DAG size of input: 123 DAG size of output: 122 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 16:02:46,826 INFO L130 PetriNetUnfolder]: 59359/101207 cut-off events. [2022-11-25 16:02:46,826 INFO L131 PetriNetUnfolder]: For 776654/776654 co-relation queries the response was YES. [2022-11-25 16:02:47,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506397 conditions, 101207 events. 59359/101207 cut-off events. For 776654/776654 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 836280 event pairs, 2288 based on Foata normal form. 220/99667 useless extension candidates. Maximal degree in co-relation 506305. Up to 24905 conditions per place. [2022-11-25 16:02:47,939 INFO L137 encePairwiseOnDemand]: 328/346 looper letters, 239 selfloop transitions, 191 changer transitions 83/513 dead transitions. [2022-11-25 16:02:47,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 513 transitions, 5160 flow [2022-11-25 16:02:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 16:02:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-25 16:02:47,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3607 transitions. [2022-11-25 16:02:47,946 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3159047118584691 [2022-11-25 16:02:47,946 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3607 transitions. [2022-11-25 16:02:47,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3607 transitions. [2022-11-25 16:02:47,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:02:47,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3607 transitions. [2022-11-25 16:02:47,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 109.3030303030303) internal successors, (3607), 33 states have internal predecessors, (3607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:02:47,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 346.0) internal successors, (11764), 34 states have internal predecessors, (11764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:02:47,964 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 346.0) internal successors, (11764), 34 states have internal predecessors, (11764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:02:47,965 INFO L175 Difference]: Start difference. First operand has 207 places, 209 transitions, 1544 flow. Second operand 33 states and 3607 transitions. [2022-11-25 16:02:47,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 513 transitions, 5160 flow [2022-11-25 16:03:55,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 513 transitions, 4648 flow, removed 166 selfloop flow, removed 10 redundant places. [2022-11-25 16:03:55,548 INFO L231 Difference]: Finished difference. Result has 245 places, 303 transitions, 2778 flow [2022-11-25 16:03:55,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2778, PETRI_PLACES=245, PETRI_TRANSITIONS=303} [2022-11-25 16:03:55,548 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 194 predicate places. [2022-11-25 16:03:55,548 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 303 transitions, 2778 flow [2022-11-25 16:03:55,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 103.08333333333333) internal successors, (2474), 24 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:03:55,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:03:55,549 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:03:55,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-25 16:03:55,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 16:03:55,757 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-25 16:03:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:03:55,757 INFO L85 PathProgramCache]: Analyzing trace with hash -378832721, now seen corresponding path program 3 times [2022-11-25 16:03:55,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 16:03:55,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449978443] [2022-11-25 16:03:55,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:03:55,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 16:03:55,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 16:03:55,760 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 16:03:55,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a129f63f-5bbb-4d9b-b11d-5b7a0b909048/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-25 16:03:55,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 16:03:55,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:03:55,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 16:03:55,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:03:56,040 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 88 treesize of output 84 [2022-11-25 16:03:56,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 5 [2022-11-25 16:03:56,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:03:57,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-25 16:03:57,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-25 16:03:57,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:03:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:03:57,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:03:57,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 16:03:57,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 16:03:57,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:03:57,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:03:57,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:03:57,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 16:03:57,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 16:03:57,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-25 16:03:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:03:58,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:04:01,012 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_786 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_785 (Array (_ BitVec 32) (_ BitVec 8))) (~front~0 (_ BitVec 32))) (or (bvsle (bvadd c_~d~0 (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_785) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_786) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) ~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset (_ bv1 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1))))) c_~W~0) (not (bvsge ~front~0 (_ bv0 32))) (not (bvslt ~front~0 c_~n~0)))) is different from false [2022-11-25 16:04:02,681 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-25 16:04:02,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 866 treesize of output 809 [2022-11-25 16:04:02,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 704 treesize of output 596 [2022-11-25 16:04:02,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 596 treesize of output 380 [2022-11-25 16:04:03,126 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-25 16:04:03,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 274 treesize of output 241