./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 16:52:56,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:52:56,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:52:56,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:52:56,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:52:56,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:52:56,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:52:56,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:52:56,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:52:56,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:52:56,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:52:56,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:52:56,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:52:56,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:52:56,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:52:56,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:52:56,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:52:56,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:52:56,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:52:56,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:52:56,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:52:56,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:52:56,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:52:56,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:52:56,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:52:56,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:52:56,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:52:56,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:52:56,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:52:56,092 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:52:56,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:52:56,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:52:56,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:52:56,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:52:56,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:52:56,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:52:56,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:52:56,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:52:56,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:52:56,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:52:56,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:52:56,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 16:52:56,112 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:52:56,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:52:56,112 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:52:56,112 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:52:56,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:52:56,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:52:56,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:52:56,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:52:56,113 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:52:56,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:52:56,113 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:52:56,113 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 16:52:56,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:52:56,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:52:56,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:52:56,114 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 16:52:56,114 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 16:52:56,114 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 16:52:56,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:52:56,114 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 16:52:56,114 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:52:56,114 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:52:56,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:52:56,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:52:56,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:52:56,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:52:56,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:52:56,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:52:56,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:52:56,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:52:56,115 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:52:56,115 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:52:56,115 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:52:56,116 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:52:56,116 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_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 [2022-12-13 16:52:56,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:52:56,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:52:56,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:52:56,351 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:52:56,351 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:52:56,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c [2022-12-13 16:52:58,957 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:52:59,120 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:52:59,120 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c [2022-12-13 16:52:59,127 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/data/a1562b042/162866d1d1db4d75bc0fb82e1fa190bb/FLAGeec5861f3 [2022-12-13 16:52:59,139 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/data/a1562b042/162866d1d1db4d75bc0fb82e1fa190bb [2022-12-13 16:52:59,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:52:59,143 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:52:59,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:52:59,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:52:59,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:52:59,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:52:59" (1/1) ... [2022-12-13 16:52:59,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa092ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:59, skipping insertion in model container [2022-12-13 16:52:59,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:52:59" (1/1) ... [2022-12-13 16:52:59,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:52:59,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:52:59,311 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:52:59,314 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:52:59,314 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:52:59,315 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:52:59,318 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:52:59,319 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:52:59,319 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:52:59,320 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:52:59,325 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:52:59,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:52:59,327 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:52:59,327 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:52:59,328 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:52:59,328 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:52:59,329 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:52:59,330 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:52:59,331 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:52:59,331 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:52:59,335 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:52:59,335 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:52:59,342 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_7746ed2e-6cbf-4074-98fa-5383252cd934/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c[4225,4238] [2022-12-13 16:52:59,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:52:59,363 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-13 16:52:59,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@66034b65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:52:59, skipping insertion in model container [2022-12-13 16:52:59,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:52:59,364 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 16:52:59,365 INFO L158 Benchmark]: Toolchain (without parser) took 222.18ms. Allocated memory is still 125.8MB. Free memory was 91.5MB in the beginning and 79.8MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 16:52:59,366 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 125.8MB. Free memory is still 98.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 16:52:59,366 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.42ms. Allocated memory is still 125.8MB. Free memory was 91.2MB in the beginning and 79.8MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 16:52:59,367 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 125.8MB. Free memory is still 98.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.42ms. Allocated memory is still 125.8MB. Free memory was 91.2MB in the beginning and 79.8MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 175]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 16:53:00,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:53:00,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:53:00,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:53:00,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:53:00,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:53:00,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:53:00,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:53:00,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:53:00,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:53:00,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:53:00,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:53:00,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:53:00,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:53:00,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:53:00,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:53:00,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:53:00,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:53:00,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:53:00,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:53:00,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:53:00,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:53:00,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:53:00,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:53:00,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:53:00,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:53:00,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:53:00,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:53:00,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:53:00,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:53:00,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:53:00,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:53:00,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:53:00,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:53:00,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:53:00,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:53:00,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:53:00,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:53:00,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:53:00,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:53:00,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:53:00,827 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 16:53:00,848 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:53:00,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:53:00,848 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:53:00,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:53:00,849 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:53:00,849 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:53:00,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:53:00,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:53:00,850 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:53:00,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:53:00,851 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:53:00,851 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 16:53:00,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:53:00,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:53:00,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:53:00,851 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 16:53:00,852 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 16:53:00,852 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 16:53:00,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:53:00,852 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 16:53:00,852 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 16:53:00,852 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 16:53:00,852 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:53:00,853 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:53:00,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:53:00,853 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:53:00,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:53:00,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:53:00,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:53:00,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:53:00,854 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 16:53:00,854 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 16:53:00,854 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:53:00,854 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:53:00,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:53:00,855 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 16:53:00,855 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:53:00,855 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_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 [2022-12-13 16:53:01,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:53:01,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:53:01,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:53:01,105 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:53:01,105 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:53:01,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c [2022-12-13 16:53:03,659 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:53:03,784 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:53:03,785 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c [2022-12-13 16:53:03,790 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/data/962e3b585/655ab9fb212d481ebcce8a2fe5d29227/FLAGf79d312ba [2022-12-13 16:53:03,800 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/data/962e3b585/655ab9fb212d481ebcce8a2fe5d29227 [2022-12-13 16:53:03,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:53:03,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:53:03,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:53:03,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:53:03,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:53:03,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:53:03" (1/1) ... [2022-12-13 16:53:03,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b657ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:53:03, skipping insertion in model container [2022-12-13 16:53:03,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:53:03" (1/1) ... [2022-12-13 16:53:03,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:53:03,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:53:03,951 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:03,953 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:03,953 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:03,954 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:03,956 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:03,957 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:03,957 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:03,958 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:03,961 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:03,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:03,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:03,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:03,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:03,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:03,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:03,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:03,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:03,966 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:03,968 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:03,968 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:03,972 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_7746ed2e-6cbf-4074-98fa-5383252cd934/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c[4225,4238] [2022-12-13 16:53:03,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:53:03,991 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 16:53:03,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:53:03,998 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:03,999 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:03,999 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:03,999 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,000 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,001 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,001 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,001 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,003 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,003 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,003 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,004 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,004 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,005 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,005 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,006 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,006 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,006 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,008 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,008 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,011 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_7746ed2e-6cbf-4074-98fa-5383252cd934/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c[4225,4238] [2022-12-13 16:53:04,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:53:04,018 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:53:04,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,029 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,029 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,029 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,030 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,030 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,030 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,031 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,033 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,033 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,034 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,034 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,034 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,035 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,035 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,036 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,036 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,036 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,037 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:53:04,038 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:53:04,041 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_7746ed2e-6cbf-4074-98fa-5383252cd934/sv-benchmarks/c/weaver/parallel-parallel-sum-2.wvr.c[4225,4238] [2022-12-13 16:53:04,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:53:04,056 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:53:04,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:53:04 WrapperNode [2022-12-13 16:53:04,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:53:04,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:53:04,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:53:04,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:53:04,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:53:04" (1/1) ... [2022-12-13 16:53:04,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:53:04" (1/1) ... [2022-12-13 16:53:04,095 INFO L138 Inliner]: procedures = 31, calls = 88, calls flagged for inlining = 22, calls inlined = 32, statements flattened = 367 [2022-12-13 16:53:04,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:53:04,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:53:04,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:53:04,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:53:04,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:53:04" (1/1) ... [2022-12-13 16:53:04,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:53:04" (1/1) ... [2022-12-13 16:53:04,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:53:04" (1/1) ... [2022-12-13 16:53:04,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:53:04" (1/1) ... [2022-12-13 16:53:04,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:53:04" (1/1) ... [2022-12-13 16:53:04,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:53:04" (1/1) ... [2022-12-13 16:53:04,120 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:53:04" (1/1) ... [2022-12-13 16:53:04,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:53:04" (1/1) ... [2022-12-13 16:53:04,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:53:04,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:53:04,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:53:04,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:53:04,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:53:04" (1/1) ... [2022-12-13 16:53:04,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:53:04,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:53:04,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:53:04,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:53:04,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:53:04,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 16:53:04,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:53:04,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 16:53:04,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 16:53:04,180 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 16:53:04,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 16:53:04,180 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 16:53:04,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 16:53:04,180 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 16:53:04,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 16:53:04,180 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 16:53:04,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-12-13 16:53:04,180 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-12-13 16:53:04,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-12-13 16:53:04,181 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-12-13 16:53:04,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 16:53:04,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 16:53:04,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 16:53:04,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:53:04,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:53:04,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:53:04,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 16:53:04,183 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 16:53:04,290 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:53:04,292 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:53:04,986 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:53:05,198 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:53:05,198 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-13 16:53:05,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:53:05 BoogieIcfgContainer [2022-12-13 16:53:05,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:53:05,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:53:05,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:53:05,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:53:05,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:53:03" (1/3) ... [2022-12-13 16:53:05,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e8a599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:53:05, skipping insertion in model container [2022-12-13 16:53:05,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:53:04" (2/3) ... [2022-12-13 16:53:05,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e8a599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:53:05, skipping insertion in model container [2022-12-13 16:53:05,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:53:05" (3/3) ... [2022-12-13 16:53:05,209 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-2.wvr.c [2022-12-13 16:53:05,228 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:53:05,228 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2022-12-13 16:53:05,228 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:53:05,362 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2022-12-13 16:53:05,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 340 transitions, 752 flow [2022-12-13 16:53:05,514 INFO L130 PetriNetUnfolder]: 21/290 cut-off events. [2022-12-13 16:53:05,514 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 16:53:05,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 290 events. 21/290 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 464 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 241. Up to 3 conditions per place. [2022-12-13 16:53:05,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 340 transitions, 752 flow [2022-12-13 16:53:05,529 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 283 places, 285 transitions, 618 flow [2022-12-13 16:53:05,533 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:53:05,543 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 283 places, 285 transitions, 618 flow [2022-12-13 16:53:05,544 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 283 places, 285 transitions, 618 flow [2022-12-13 16:53:05,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 285 transitions, 618 flow [2022-12-13 16:53:05,604 INFO L130 PetriNetUnfolder]: 21/285 cut-off events. [2022-12-13 16:53:05,604 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 16:53:05,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 285 events. 21/285 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 464 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 241. Up to 3 conditions per place. [2022-12-13 16:53:05,612 INFO L119 LiptonReduction]: Number of co-enabled transitions 13600 [2022-12-13 16:53:33,249 INFO L134 LiptonReduction]: Checked pairs total: 54003 [2022-12-13 16:53:33,249 INFO L136 LiptonReduction]: Total number of compositions: 266 [2022-12-13 16:53:33,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:53:33,267 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;@6fbf74bf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:53:33,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2022-12-13 16:53:33,269 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 16:53:33,269 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:53:33,270 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:53:33,270 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 16:53:33,270 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:53:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:53:33,274 INFO L85 PathProgramCache]: Analyzing trace with hash 51041, now seen corresponding path program 1 times [2022-12-13 16:53:33,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:53:33,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141771528] [2022-12-13 16:53:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:53:33,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:53:33,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:53:33,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:53:33,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 16:53:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:53:33,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 16:53:33,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:53:33,491 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 16:53:33,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 16:53:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:53:33,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:53:33,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:53:33,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141771528] [2022-12-13 16:53:33,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141771528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:53:33,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:53:33,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:53:33,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729176504] [2022-12-13 16:53:33,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:53:33,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:53:33,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:53:33,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:53:33,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:53:33,820 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 610 [2022-12-13 16:53:33,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 96 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:53:33,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:53:33,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 610 [2022-12-13 16:53:33,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:53:48,655 INFO L130 PetriNetUnfolder]: 132970/168089 cut-off events. [2022-12-13 16:53:48,655 INFO L131 PetriNetUnfolder]: For 10692/10692 co-relation queries the response was YES. [2022-12-13 16:53:48,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341967 conditions, 168089 events. 132970/168089 cut-off events. For 10692/10692 co-relation queries the response was YES. Maximal size of possible extension queue 6624. Compared 898421 event pairs, 85824 based on Foata normal form. 0/55479 useless extension candidates. Maximal degree in co-relation 340454. Up to 160367 conditions per place. [2022-12-13 16:53:49,559 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 72 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2022-12-13 16:53:49,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 422 flow [2022-12-13 16:53:49,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:53:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:53:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 903 transitions. [2022-12-13 16:53:49,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4934426229508197 [2022-12-13 16:53:49,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 903 transitions. [2022-12-13 16:53:49,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 903 transitions. [2022-12-13 16:53:49,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:53:49,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 903 transitions. [2022-12-13 16:53:49,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:53:49,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:53:49,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:53:49,606 INFO L175 Difference]: Start difference. First operand has 106 places, 96 transitions, 240 flow. Second operand 3 states and 903 transitions. [2022-12-13 16:53:49,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 422 flow [2022-12-13 16:53:49,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 386 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-12-13 16:53:49,764 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 232 flow [2022-12-13 16:53:49,765 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2022-12-13 16:53:49,768 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -10 predicate places. [2022-12-13 16:53:49,768 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 232 flow [2022-12-13 16:53:49,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:53:49,768 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:53:49,768 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 16:53:49,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:53:49,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:53:49,971 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:53:49,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:53:49,972 INFO L85 PathProgramCache]: Analyzing trace with hash 51040, now seen corresponding path program 1 times [2022-12-13 16:53:49,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:53:49,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127039641] [2022-12-13 16:53:49,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:53:49,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:53:49,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:53:49,978 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:53:49,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 16:53:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:53:50,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:53:50,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:53:50,131 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 16:53:50,132 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 16:53:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:53:50,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:53:50,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:53:50,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127039641] [2022-12-13 16:53:50,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127039641] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:53:50,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:53:50,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:53:50,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207676278] [2022-12-13 16:53:50,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:53:50,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:53:50,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:53:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:53:50,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:53:50,286 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 610 [2022-12-13 16:53:50,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:53:50,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:53:50,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 610 [2022-12-13 16:53:50,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:03,660 INFO L130 PetriNetUnfolder]: 129376/163055 cut-off events. [2022-12-13 16:54:03,660 INFO L131 PetriNetUnfolder]: For 1934/1934 co-relation queries the response was YES. [2022-12-13 16:54:03,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322192 conditions, 163055 events. 129376/163055 cut-off events. For 1934/1934 co-relation queries the response was YES. Maximal size of possible extension queue 6624. Compared 869389 event pairs, 99066 based on Foata normal form. 0/52879 useless extension candidates. Maximal degree in co-relation 319826. Up to 149066 conditions per place. [2022-12-13 16:54:04,318 INFO L137 encePairwiseOnDemand]: 606/610 looper letters, 99 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2022-12-13 16:54:04,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 140 transitions, 533 flow [2022-12-13 16:54:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 915 transitions. [2022-12-13 16:54:04,320 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-12-13 16:54:04,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 915 transitions. [2022-12-13 16:54:04,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 915 transitions. [2022-12-13 16:54:04,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:04,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 915 transitions. [2022-12-13 16:54:04,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:04,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:04,325 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:04,325 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 232 flow. Second operand 3 states and 915 transitions. [2022-12-13 16:54:04,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 140 transitions, 533 flow [2022-12-13 16:54:04,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 140 transitions, 529 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:04,327 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 243 flow [2022-12-13 16:54:04,328 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=243, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2022-12-13 16:54:04,328 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -9 predicate places. [2022-12-13 16:54:04,329 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 243 flow [2022-12-13 16:54:04,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:04,330 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:04,330 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 16:54:04,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 16:54:04,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:54:04,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:54:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:04,531 INFO L85 PathProgramCache]: Analyzing trace with hash 51228, now seen corresponding path program 1 times [2022-12-13 16:54:04,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:54:04,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612485406] [2022-12-13 16:54:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:04,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:54:04,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:54:04,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:54:04,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 16:54:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:04,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 16:54:04,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:04,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:04,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:04,659 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 16:54:04,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-13 16:54:04,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 16:54:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:04,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:54:04,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:54:04,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612485406] [2022-12-13 16:54:04,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612485406] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:04,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:04,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:54:04,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449154945] [2022-12-13 16:54:04,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:04,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:04,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:54:04,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:04,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:54:04,971 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 610 [2022-12-13 16:54:04,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:04,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:04,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 610 [2022-12-13 16:54:04,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:13,903 INFO L130 PetriNetUnfolder]: 95727/121179 cut-off events. [2022-12-13 16:54:13,903 INFO L131 PetriNetUnfolder]: For 1931/1931 co-relation queries the response was YES. [2022-12-13 16:54:14,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240341 conditions, 121179 events. 95727/121179 cut-off events. For 1931/1931 co-relation queries the response was YES. Maximal size of possible extension queue 5014. Compared 633612 event pairs, 76157 based on Foata normal form. 0/41494 useless extension candidates. Maximal degree in co-relation 234860. Up to 115655 conditions per place. [2022-12-13 16:54:14,403 INFO L137 encePairwiseOnDemand]: 607/610 looper letters, 58 selfloop transitions, 1 changer transitions 0/97 dead transitions. [2022-12-13 16:54:14,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 357 flow [2022-12-13 16:54:14,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 895 transitions. [2022-12-13 16:54:14,406 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4890710382513661 [2022-12-13 16:54:14,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 895 transitions. [2022-12-13 16:54:14,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 895 transitions. [2022-12-13 16:54:14,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:14,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 895 transitions. [2022-12-13 16:54:14,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.3333333333333) internal successors, (895), 3 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:14,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:14,411 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:14,411 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 243 flow. Second operand 3 states and 895 transitions. [2022-12-13 16:54:14,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 357 flow [2022-12-13 16:54:14,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 354 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:14,417 INFO L231 Difference]: Finished difference. Result has 96 places, 97 transitions, 238 flow [2022-12-13 16:54:14,417 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=96, PETRI_TRANSITIONS=97} [2022-12-13 16:54:14,418 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -10 predicate places. [2022-12-13 16:54:14,418 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 97 transitions, 238 flow [2022-12-13 16:54:14,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:14,418 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:14,419 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 16:54:14,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 16:54:14,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:54:14,620 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:54:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:14,622 INFO L85 PathProgramCache]: Analyzing trace with hash 51227, now seen corresponding path program 1 times [2022-12-13 16:54:14,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:54:14,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945933311] [2022-12-13 16:54:14,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:14,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:54:14,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:54:14,645 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:54:14,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 16:54:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:14,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 16:54:14,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:14,754 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 16:54:14,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-12-13 16:54:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:14,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:54:14,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:54:14,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945933311] [2022-12-13 16:54:14,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945933311] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:14,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:14,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:54:14,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301008452] [2022-12-13 16:54:14,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:14,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:14,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:54:14,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:14,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:54:15,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 610 [2022-12-13 16:54:15,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 97 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:15,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:15,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 610 [2022-12-13 16:54:15,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:21,353 INFO L130 PetriNetUnfolder]: 63071/80512 cut-off events. [2022-12-13 16:54:21,353 INFO L131 PetriNetUnfolder]: For 1330/1330 co-relation queries the response was YES. [2022-12-13 16:54:21,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159440 conditions, 80512 events. 63071/80512 cut-off events. For 1330/1330 co-relation queries the response was YES. Maximal size of possible extension queue 3408. Compared 410060 event pairs, 46787 based on Foata normal form. 0/30492 useless extension candidates. Maximal degree in co-relation 159430. Up to 71740 conditions per place. [2022-12-13 16:54:21,667 INFO L137 encePairwiseOnDemand]: 605/610 looper letters, 94 selfloop transitions, 3 changer transitions 0/135 dead transitions. [2022-12-13 16:54:21,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 135 transitions, 521 flow [2022-12-13 16:54:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 911 transitions. [2022-12-13 16:54:21,670 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49781420765027323 [2022-12-13 16:54:21,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 911 transitions. [2022-12-13 16:54:21,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 911 transitions. [2022-12-13 16:54:21,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:21,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 911 transitions. [2022-12-13 16:54:21,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:21,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:21,675 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:21,675 INFO L175 Difference]: Start difference. First operand has 96 places, 97 transitions, 238 flow. Second operand 3 states and 911 transitions. [2022-12-13 16:54:21,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 135 transitions, 521 flow [2022-12-13 16:54:21,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 135 transitions, 520 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:21,682 INFO L231 Difference]: Finished difference. Result has 97 places, 96 transitions, 246 flow [2022-12-13 16:54:21,682 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=97, PETRI_TRANSITIONS=96} [2022-12-13 16:54:21,683 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -9 predicate places. [2022-12-13 16:54:21,683 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 96 transitions, 246 flow [2022-12-13 16:54:21,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:21,683 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:21,683 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 16:54:21,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 16:54:21,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:54:21,886 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:54:21,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:21,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1588548, now seen corresponding path program 1 times [2022-12-13 16:54:21,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:54:21,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488758669] [2022-12-13 16:54:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:21,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:54:21,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:54:21,890 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:54:21,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 16:54:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:21,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 16:54:21,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:22,010 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 16:54:22,011 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 16:54:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:22,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:22,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:54:22,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488758669] [2022-12-13 16:54:22,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488758669] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:22,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:54:22,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 16:54:22,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786697305] [2022-12-13 16:54:22,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:22,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:54:22,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:54:22,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:54:22,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:54:23,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 610 [2022-12-13 16:54:23,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 96 transitions, 246 flow. Second operand has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:23,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:23,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 610 [2022-12-13 16:54:23,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:30,674 INFO L130 PetriNetUnfolder]: 64778/82947 cut-off events. [2022-12-13 16:54:30,674 INFO L131 PetriNetUnfolder]: For 2560/2560 co-relation queries the response was YES. [2022-12-13 16:54:30,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165468 conditions, 82947 events. 64778/82947 cut-off events. For 2560/2560 co-relation queries the response was YES. Maximal size of possible extension queue 3408. Compared 423589 event pairs, 50654 based on Foata normal form. 0/32282 useless extension candidates. Maximal degree in co-relation 165456. Up to 79037 conditions per place. [2022-12-13 16:54:30,992 INFO L137 encePairwiseOnDemand]: 602/610 looper letters, 76 selfloop transitions, 17 changer transitions 0/125 dead transitions. [2022-12-13 16:54:30,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 125 transitions, 514 flow [2022-12-13 16:54:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:54:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:54:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1714 transitions. [2022-12-13 16:54:30,996 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46830601092896174 [2022-12-13 16:54:30,996 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1714 transitions. [2022-12-13 16:54:30,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1714 transitions. [2022-12-13 16:54:30,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:30,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1714 transitions. [2022-12-13 16:54:30,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.6666666666667) internal successors, (1714), 6 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,004 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,004 INFO L175 Difference]: Start difference. First operand has 97 places, 96 transitions, 246 flow. Second operand 6 states and 1714 transitions. [2022-12-13 16:54:31,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 125 transitions, 514 flow [2022-12-13 16:54:31,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 125 transitions, 508 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:54:31,021 INFO L231 Difference]: Finished difference. Result has 104 places, 109 transitions, 368 flow [2022-12-13 16:54:31,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=368, PETRI_PLACES=104, PETRI_TRANSITIONS=109} [2022-12-13 16:54:31,022 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -2 predicate places. [2022-12-13 16:54:31,022 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 109 transitions, 368 flow [2022-12-13 16:54:31,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:31,023 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:54:31,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 16:54:31,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:54:31,224 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:54:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:31,225 INFO L85 PathProgramCache]: Analyzing trace with hash 103073828, now seen corresponding path program 1 times [2022-12-13 16:54:31,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:54:31,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887644696] [2022-12-13 16:54:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:31,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:54:31,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:54:31,227 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:54:31,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 16:54:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:31,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:54:31,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:31,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:31,342 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-13 16:54:31,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-12-13 16:54:31,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-12-13 16:54:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:31,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:54:31,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:54:31,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887644696] [2022-12-13 16:54:31,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887644696] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:31,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:31,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:54:31,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720480922] [2022-12-13 16:54:31,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:31,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:31,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:54:31,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:31,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:54:31,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 610 [2022-12-13 16:54:31,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 109 transitions, 368 flow. Second operand has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:31,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 610 [2022-12-13 16:54:31,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:38,104 INFO L130 PetriNetUnfolder]: 63211/80849 cut-off events. [2022-12-13 16:54:38,104 INFO L131 PetriNetUnfolder]: For 1577/1580 co-relation queries the response was YES. [2022-12-13 16:54:38,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160710 conditions, 80849 events. 63211/80849 cut-off events. For 1577/1580 co-relation queries the response was YES. Maximal size of possible extension queue 3407. Compared 413648 event pairs, 49872 based on Foata normal form. 82/31114 useless extension candidates. Maximal degree in co-relation 160694. Up to 77056 conditions per place. [2022-12-13 16:54:38,428 INFO L137 encePairwiseOnDemand]: 607/610 looper letters, 61 selfloop transitions, 1 changer transitions 0/107 dead transitions. [2022-12-13 16:54:38,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 107 transitions, 488 flow [2022-12-13 16:54:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 893 transitions. [2022-12-13 16:54:38,431 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48797814207650275 [2022-12-13 16:54:38,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 893 transitions. [2022-12-13 16:54:38,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 893 transitions. [2022-12-13 16:54:38,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:38,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 893 transitions. [2022-12-13 16:54:38,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.6666666666667) internal successors, (893), 3 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:38,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:38,435 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:38,435 INFO L175 Difference]: Start difference. First operand has 104 places, 109 transitions, 368 flow. Second operand 3 states and 893 transitions. [2022-12-13 16:54:38,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 107 transitions, 488 flow [2022-12-13 16:54:38,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 107 transitions, 466 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:38,440 INFO L231 Difference]: Finished difference. Result has 103 places, 107 transitions, 344 flow [2022-12-13 16:54:38,440 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=103, PETRI_TRANSITIONS=107} [2022-12-13 16:54:38,441 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -3 predicate places. [2022-12-13 16:54:38,441 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 107 transitions, 344 flow [2022-12-13 16:54:38,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:38,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:38,441 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:54:38,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 16:54:38,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:54:38,643 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:54:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash 103073827, now seen corresponding path program 1 times [2022-12-13 16:54:38,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:54:38,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451933798] [2022-12-13 16:54:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:38,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:54:38,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:54:38,650 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:54:38,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 16:54:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:38,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 16:54:38,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:38,743 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 16:54:38,743 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 2 case distinctions, treesize of input 12 treesize of output 22 [2022-12-13 16:54:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:38,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:54:38,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:54:38,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451933798] [2022-12-13 16:54:38,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451933798] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:38,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:38,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:54:38,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249311599] [2022-12-13 16:54:38,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:38,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:38,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:54:38,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:38,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:54:38,891 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 610 [2022-12-13 16:54:38,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 107 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:38,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:38,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 610 [2022-12-13 16:54:38,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:45,893 INFO L130 PetriNetUnfolder]: 65033/85369 cut-off events. [2022-12-13 16:54:45,893 INFO L131 PetriNetUnfolder]: For 1789/1790 co-relation queries the response was YES. [2022-12-13 16:54:46,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167893 conditions, 85369 events. 65033/85369 cut-off events. For 1789/1790 co-relation queries the response was YES. Maximal size of possible extension queue 3413. Compared 467986 event pairs, 48391 based on Foata normal form. 0/33830 useless extension candidates. Maximal degree in co-relation 167876. Up to 74738 conditions per place. [2022-12-13 16:54:46,262 INFO L137 encePairwiseOnDemand]: 601/610 looper letters, 104 selfloop transitions, 8 changer transitions 0/155 dead transitions. [2022-12-13 16:54:46,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 155 transitions, 683 flow [2022-12-13 16:54:46,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 911 transitions. [2022-12-13 16:54:46,264 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49781420765027323 [2022-12-13 16:54:46,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 911 transitions. [2022-12-13 16:54:46,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 911 transitions. [2022-12-13 16:54:46,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:46,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 911 transitions. [2022-12-13 16:54:46,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:46,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:46,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:46,268 INFO L175 Difference]: Start difference. First operand has 103 places, 107 transitions, 344 flow. Second operand 3 states and 911 transitions. [2022-12-13 16:54:46,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 155 transitions, 683 flow [2022-12-13 16:54:46,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 682 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:46,272 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 401 flow [2022-12-13 16:54:46,272 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=401, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2022-12-13 16:54:46,273 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 0 predicate places. [2022-12-13 16:54:46,273 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 401 flow [2022-12-13 16:54:46,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:46,273 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:46,273 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 16:54:46,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-12-13 16:54:46,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:54:46,475 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:54:46,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:46,476 INFO L85 PathProgramCache]: Analyzing trace with hash 86026273, now seen corresponding path program 2 times [2022-12-13 16:54:46,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:54:46,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338617570] [2022-12-13 16:54:46,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:54:46,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:54:46,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:54:46,482 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:54:46,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 16:54:46,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:54:46,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:54:46,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 16:54:46,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:46,650 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 16:54:46,650 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 16:54:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:46,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:47,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:54:47,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338617570] [2022-12-13 16:54:47,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338617570] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:47,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:54:47,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 16:54:47,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805288487] [2022-12-13 16:54:47,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:47,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 16:54:47,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:54:47,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 16:54:47,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:54:52,817 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 610 [2022-12-13 16:54:52,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 401 flow. Second operand has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:52,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:52,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 610 [2022-12-13 16:54:52,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:04,367 INFO L130 PetriNetUnfolder]: 66249/87045 cut-off events. [2022-12-13 16:55:04,367 INFO L131 PetriNetUnfolder]: For 6114/6118 co-relation queries the response was YES. [2022-12-13 16:55:04,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174327 conditions, 87045 events. 66249/87045 cut-off events. For 6114/6118 co-relation queries the response was YES. Maximal size of possible extension queue 3416. Compared 476940 event pairs, 44869 based on Foata normal form. 6/35103 useless extension candidates. Maximal degree in co-relation 174307. Up to 80971 conditions per place. [2022-12-13 16:55:04,922 INFO L137 encePairwiseOnDemand]: 602/610 looper letters, 117 selfloop transitions, 40 changer transitions 0/189 dead transitions. [2022-12-13 16:55:04,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 189 transitions, 1014 flow [2022-12-13 16:55:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 16:55:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 16:55:04,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3951 transitions. [2022-12-13 16:55:04,929 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4626463700234192 [2022-12-13 16:55:04,929 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3951 transitions. [2022-12-13 16:55:04,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3951 transitions. [2022-12-13 16:55:04,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:04,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3951 transitions. [2022-12-13 16:55:04,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 282.2142857142857) internal successors, (3951), 14 states have internal predecessors, (3951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:04,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 610.0) internal successors, (9150), 15 states have internal predecessors, (9150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:04,950 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 610.0) internal successors, (9150), 15 states have internal predecessors, (9150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:04,951 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 401 flow. Second operand 14 states and 3951 transitions. [2022-12-13 16:55:04,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 189 transitions, 1014 flow [2022-12-13 16:55:04,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 189 transitions, 998 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:55:04,968 INFO L231 Difference]: Finished difference. Result has 125 places, 137 transitions, 693 flow [2022-12-13 16:55:04,968 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=693, PETRI_PLACES=125, PETRI_TRANSITIONS=137} [2022-12-13 16:55:04,969 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 19 predicate places. [2022-12-13 16:55:04,969 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 137 transitions, 693 flow [2022-12-13 16:55:04,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:04,970 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:04,970 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:04,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 16:55:05,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:55:05,172 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:55:05,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:05,173 INFO L85 PathProgramCache]: Analyzing trace with hash -31772492, now seen corresponding path program 1 times [2022-12-13 16:55:05,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:55:05,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242769750] [2022-12-13 16:55:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:05,175 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:55:05,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:55:05,178 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:55:05,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 16:55:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:05,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 16:55:05,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:05,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 16:55:05,295 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 16:55:05,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 16:55:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:05,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:55:05,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:55:05,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242769750] [2022-12-13 16:55:05,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242769750] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:55:05,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:55:05,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:55:05,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050573472] [2022-12-13 16:55:05,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:55:05,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:55:05,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:55:05,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:55:05,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:55:05,425 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 610 [2022-12-13 16:55:05,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 137 transitions, 693 flow. Second operand has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:05,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:05,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 610 [2022-12-13 16:55:05,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:11,765 INFO L130 PetriNetUnfolder]: 53848/71569 cut-off events. [2022-12-13 16:55:11,765 INFO L131 PetriNetUnfolder]: For 4887/4891 co-relation queries the response was YES. [2022-12-13 16:55:11,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143337 conditions, 71569 events. 53848/71569 cut-off events. For 4887/4891 co-relation queries the response was YES. Maximal size of possible extension queue 2579. Compared 393284 event pairs, 40193 based on Foata normal form. 0/30276 useless extension candidates. Maximal degree in co-relation 143309. Up to 58804 conditions per place. [2022-12-13 16:55:12,155 INFO L137 encePairwiseOnDemand]: 602/610 looper letters, 112 selfloop transitions, 19 changer transitions 0/180 dead transitions. [2022-12-13 16:55:12,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 180 transitions, 1065 flow [2022-12-13 16:55:12,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:55:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:55:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 909 transitions. [2022-12-13 16:55:12,157 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4967213114754098 [2022-12-13 16:55:12,158 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 909 transitions. [2022-12-13 16:55:12,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 909 transitions. [2022-12-13 16:55:12,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:12,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 909 transitions. [2022-12-13 16:55:12,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.0) internal successors, (909), 3 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:12,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:12,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:12,162 INFO L175 Difference]: Start difference. First operand has 125 places, 137 transitions, 693 flow. Second operand 3 states and 909 transitions. [2022-12-13 16:55:12,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 180 transitions, 1065 flow [2022-12-13 16:55:12,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 180 transitions, 1033 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-12-13 16:55:12,172 INFO L231 Difference]: Finished difference. Result has 127 places, 142 transitions, 770 flow [2022-12-13 16:55:12,172 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=770, PETRI_PLACES=127, PETRI_TRANSITIONS=142} [2022-12-13 16:55:12,172 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 21 predicate places. [2022-12-13 16:55:12,173 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 142 transitions, 770 flow [2022-12-13 16:55:12,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:12,173 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:12,173 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:12,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 16:55:12,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:55:12,375 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:55:12,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:12,376 INFO L85 PathProgramCache]: Analyzing trace with hash -31772491, now seen corresponding path program 1 times [2022-12-13 16:55:12,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:55:12,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882623039] [2022-12-13 16:55:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:12,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:55:12,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:55:12,381 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:55:12,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 16:55:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:12,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:55:12,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:12,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:55:12,549 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:55:12,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 16:55:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:12,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:55:12,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:55:12,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882623039] [2022-12-13 16:55:12,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882623039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:55:12,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:55:12,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:55:12,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976090775] [2022-12-13 16:55:12,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:55:12,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:55:12,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:55:12,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:55:12,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:55:12,718 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 610 [2022-12-13 16:55:12,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 142 transitions, 770 flow. Second operand has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:12,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:12,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 610 [2022-12-13 16:55:12,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:17,823 INFO L130 PetriNetUnfolder]: 39490/53024 cut-off events. [2022-12-13 16:55:17,823 INFO L131 PetriNetUnfolder]: For 11552/11556 co-relation queries the response was YES. [2022-12-13 16:55:17,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111241 conditions, 53024 events. 39490/53024 cut-off events. For 11552/11556 co-relation queries the response was YES. Maximal size of possible extension queue 1723. Compared 288023 event pairs, 25949 based on Foata normal form. 2890/27130 useless extension candidates. Maximal degree in co-relation 111212. Up to 43462 conditions per place. [2022-12-13 16:55:18,146 INFO L137 encePairwiseOnDemand]: 606/610 looper letters, 96 selfloop transitions, 16 changer transitions 0/163 dead transitions. [2022-12-13 16:55:18,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 163 transitions, 1049 flow [2022-12-13 16:55:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:55:18,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:55:18,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 920 transitions. [2022-12-13 16:55:18,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5027322404371585 [2022-12-13 16:55:18,149 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 920 transitions. [2022-12-13 16:55:18,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 920 transitions. [2022-12-13 16:55:18,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:18,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 920 transitions. [2022-12-13 16:55:18,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 306.6666666666667) internal successors, (920), 3 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:18,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:18,152 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:18,152 INFO L175 Difference]: Start difference. First operand has 127 places, 142 transitions, 770 flow. Second operand 3 states and 920 transitions. [2022-12-13 16:55:18,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 163 transitions, 1049 flow [2022-12-13 16:55:18,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 163 transitions, 1011 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:55:18,170 INFO L231 Difference]: Finished difference. Result has 125 places, 140 transitions, 760 flow [2022-12-13 16:55:18,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=760, PETRI_PLACES=125, PETRI_TRANSITIONS=140} [2022-12-13 16:55:18,170 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 19 predicate places. [2022-12-13 16:55:18,170 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 140 transitions, 760 flow [2022-12-13 16:55:18,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:18,171 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:18,171 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:18,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 16:55:18,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:55:18,372 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:55:18,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:18,374 INFO L85 PathProgramCache]: Analyzing trace with hash -468553542, now seen corresponding path program 1 times [2022-12-13 16:55:18,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:55:18,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656983251] [2022-12-13 16:55:18,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:18,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:55:18,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:55:18,378 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:55:18,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 16:55:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:18,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 16:55:18,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:18,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:55:18,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:55:18,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656983251] [2022-12-13 16:55:18,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656983251] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:55:18,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:55:18,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:55:18,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187837439] [2022-12-13 16:55:18,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:55:18,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:55:18,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:55:18,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:55:18,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:55:18,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 610 [2022-12-13 16:55:18,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 140 transitions, 760 flow. Second operand has 4 states, 4 states have (on average 280.25) internal successors, (1121), 4 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:18,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:18,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 610 [2022-12-13 16:55:18,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:25,032 INFO L130 PetriNetUnfolder]: 49894/66837 cut-off events. [2022-12-13 16:55:25,032 INFO L131 PetriNetUnfolder]: For 10969/10976 co-relation queries the response was YES. [2022-12-13 16:55:25,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139099 conditions, 66837 events. 49894/66837 cut-off events. For 10969/10976 co-relation queries the response was YES. Maximal size of possible extension queue 2088. Compared 371683 event pairs, 38654 based on Foata normal form. 122/32069 useless extension candidates. Maximal degree in co-relation 139070. Up to 48823 conditions per place. [2022-12-13 16:55:25,399 INFO L137 encePairwiseOnDemand]: 600/610 looper letters, 113 selfloop transitions, 3 changer transitions 0/180 dead transitions. [2022-12-13 16:55:25,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 180 transitions, 1120 flow [2022-12-13 16:55:25,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:55:25,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:55:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1214 transitions. [2022-12-13 16:55:25,402 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49754098360655735 [2022-12-13 16:55:25,402 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1214 transitions. [2022-12-13 16:55:25,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1214 transitions. [2022-12-13 16:55:25,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:25,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1214 transitions. [2022-12-13 16:55:25,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 303.5) internal successors, (1214), 4 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:25,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:25,406 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:25,406 INFO L175 Difference]: Start difference. First operand has 125 places, 140 transitions, 760 flow. Second operand 4 states and 1214 transitions. [2022-12-13 16:55:25,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 180 transitions, 1120 flow [2022-12-13 16:55:25,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 180 transitions, 1088 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:55:25,418 INFO L231 Difference]: Finished difference. Result has 128 places, 141 transitions, 764 flow [2022-12-13 16:55:25,418 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=764, PETRI_PLACES=128, PETRI_TRANSITIONS=141} [2022-12-13 16:55:25,418 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 22 predicate places. [2022-12-13 16:55:25,418 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 141 transitions, 764 flow [2022-12-13 16:55:25,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 280.25) internal successors, (1121), 4 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:25,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:25,419 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:25,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 16:55:25,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:55:25,621 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:55:25,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:25,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1668066404, now seen corresponding path program 1 times [2022-12-13 16:55:25,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:55:25,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801542250] [2022-12-13 16:55:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:25,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:55:25,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:55:25,626 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:55:25,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 16:55:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:25,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 16:55:25,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:25,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:55:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:25,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:55:25,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801542250] [2022-12-13 16:55:25,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801542250] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:55:25,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:55:25,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 16:55:25,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21767647] [2022-12-13 16:55:25,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:55:25,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:55:25,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:55:25,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:55:25,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:55:26,347 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 610 [2022-12-13 16:55:26,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 141 transitions, 764 flow. Second operand has 8 states, 8 states have (on average 276.5) internal successors, (2212), 8 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:26,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:26,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 610 [2022-12-13 16:55:26,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:35,044 INFO L130 PetriNetUnfolder]: 64253/87089 cut-off events. [2022-12-13 16:55:35,044 INFO L131 PetriNetUnfolder]: For 18401/18410 co-relation queries the response was YES. [2022-12-13 16:55:35,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191826 conditions, 87089 events. 64253/87089 cut-off events. For 18401/18410 co-relation queries the response was YES. Maximal size of possible extension queue 2385. Compared 512665 event pairs, 48342 based on Foata normal form. 1894/48481 useless extension candidates. Maximal degree in co-relation 191794. Up to 43781 conditions per place. [2022-12-13 16:55:35,593 INFO L137 encePairwiseOnDemand]: 599/610 looper letters, 180 selfloop transitions, 13 changer transitions 0/257 dead transitions. [2022-12-13 16:55:35,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 257 transitions, 1532 flow [2022-12-13 16:55:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:55:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 16:55:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2641 transitions. [2022-12-13 16:55:35,598 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4810564663023679 [2022-12-13 16:55:35,598 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2641 transitions. [2022-12-13 16:55:35,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2641 transitions. [2022-12-13 16:55:35,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:35,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2641 transitions. [2022-12-13 16:55:35,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 293.44444444444446) internal successors, (2641), 9 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:35,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 610.0) internal successors, (6100), 10 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:35,606 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 610.0) internal successors, (6100), 10 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:35,606 INFO L175 Difference]: Start difference. First operand has 128 places, 141 transitions, 764 flow. Second operand 9 states and 2641 transitions. [2022-12-13 16:55:35,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 257 transitions, 1532 flow [2022-12-13 16:55:35,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 257 transitions, 1524 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 16:55:35,628 INFO L231 Difference]: Finished difference. Result has 137 places, 145 transitions, 843 flow [2022-12-13 16:55:35,628 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=843, PETRI_PLACES=137, PETRI_TRANSITIONS=145} [2022-12-13 16:55:35,629 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 31 predicate places. [2022-12-13 16:55:35,629 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 145 transitions, 843 flow [2022-12-13 16:55:35,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 276.5) internal successors, (2212), 8 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:35,629 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:35,629 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:35,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 16:55:35,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:55:35,831 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:55:35,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:35,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2045146884, now seen corresponding path program 1 times [2022-12-13 16:55:35,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:55:35,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909318430] [2022-12-13 16:55:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:35,834 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:55:35,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:55:35,837 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:55:35,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 16:55:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:35,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 16:55:35,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:35,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:55:35,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 16:55:35,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:55:35,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 16:55:35,953 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 16:55:35,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 16:55:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:35,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:55:35,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:55:35,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909318430] [2022-12-13 16:55:35,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909318430] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:55:35,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:55:35,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:55:35,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472755421] [2022-12-13 16:55:35,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:55:35,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:55:35,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:55:35,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:55:35,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:55:36,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 610 [2022-12-13 16:55:36,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 145 transitions, 843 flow. Second operand has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:36,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:36,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 610 [2022-12-13 16:55:36,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:42,347 INFO L130 PetriNetUnfolder]: 40956/60937 cut-off events. [2022-12-13 16:55:42,347 INFO L131 PetriNetUnfolder]: For 19623/19633 co-relation queries the response was YES. [2022-12-13 16:55:42,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139383 conditions, 60937 events. 40956/60937 cut-off events. For 19623/19633 co-relation queries the response was YES. Maximal size of possible extension queue 1519. Compared 417504 event pairs, 10974 based on Foata normal form. 0/37212 useless extension candidates. Maximal degree in co-relation 139348. Up to 43415 conditions per place. [2022-12-13 16:55:42,653 INFO L137 encePairwiseOnDemand]: 600/610 looper letters, 121 selfloop transitions, 25 changer transitions 0/194 dead transitions. [2022-12-13 16:55:42,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 194 transitions, 1324 flow [2022-12-13 16:55:42,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:55:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:55:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1172 transitions. [2022-12-13 16:55:42,656 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48032786885245904 [2022-12-13 16:55:42,656 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1172 transitions. [2022-12-13 16:55:42,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1172 transitions. [2022-12-13 16:55:42,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:42,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1172 transitions. [2022-12-13 16:55:42,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:42,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:42,660 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:42,660 INFO L175 Difference]: Start difference. First operand has 137 places, 145 transitions, 843 flow. Second operand 4 states and 1172 transitions. [2022-12-13 16:55:42,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 194 transitions, 1324 flow [2022-12-13 16:55:42,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 194 transitions, 1302 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-13 16:55:42,686 INFO L231 Difference]: Finished difference. Result has 137 places, 151 transitions, 965 flow [2022-12-13 16:55:42,686 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=965, PETRI_PLACES=137, PETRI_TRANSITIONS=151} [2022-12-13 16:55:42,687 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 31 predicate places. [2022-12-13 16:55:42,687 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 151 transitions, 965 flow [2022-12-13 16:55:42,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:42,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:42,687 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:42,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 16:55:42,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:55:42,888 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:55:42,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:42,889 INFO L85 PathProgramCache]: Analyzing trace with hash -198259431, now seen corresponding path program 2 times [2022-12-13 16:55:42,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:55:42,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564633439] [2022-12-13 16:55:42,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:55:42,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:55:42,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:55:42,894 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:55:42,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 16:55:42,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:55:42,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:55:42,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 16:55:43,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:43,079 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-12-13 16:55:43,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-12-13 16:55:43,147 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 16:55:43,147 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 16:55:43,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:55:43,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 16:55:43,340 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 16:55:43,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 16:55:43,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:55:43,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 16:55:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:55:43,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:55:43,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:55:43,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564633439] [2022-12-13 16:55:43,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564633439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:55:43,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:55:43,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:55:43,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880115448] [2022-12-13 16:55:43,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:55:43,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:55:43,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:55:43,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:55:43,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:55:45,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 610 [2022-12-13 16:55:45,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 151 transitions, 965 flow. Second operand has 6 states, 6 states have (on average 261.3333333333333) internal successors, (1568), 6 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:45,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:45,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 610 [2022-12-13 16:55:45,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:53,823 INFO L130 PetriNetUnfolder]: 50753/71889 cut-off events. [2022-12-13 16:55:53,824 INFO L131 PetriNetUnfolder]: For 44973/45173 co-relation queries the response was YES. [2022-12-13 16:55:54,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182491 conditions, 71889 events. 50753/71889 cut-off events. For 44973/45173 co-relation queries the response was YES. Maximal size of possible extension queue 1595. Compared 456633 event pairs, 13039 based on Foata normal form. 26/45649 useless extension candidates. Maximal degree in co-relation 182456. Up to 23917 conditions per place. [2022-12-13 16:55:54,257 INFO L137 encePairwiseOnDemand]: 593/610 looper letters, 229 selfloop transitions, 51 changer transitions 0/312 dead transitions. [2022-12-13 16:55:54,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 312 transitions, 2198 flow [2022-12-13 16:55:54,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:55:54,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 16:55:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2031 transitions. [2022-12-13 16:55:54,261 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4756440281030445 [2022-12-13 16:55:54,261 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2031 transitions. [2022-12-13 16:55:54,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2031 transitions. [2022-12-13 16:55:54,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:54,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2031 transitions. [2022-12-13 16:55:54,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 290.14285714285717) internal successors, (2031), 7 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:54,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 610.0) internal successors, (4880), 8 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:54,267 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 610.0) internal successors, (4880), 8 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:54,267 INFO L175 Difference]: Start difference. First operand has 137 places, 151 transitions, 965 flow. Second operand 7 states and 2031 transitions. [2022-12-13 16:55:54,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 312 transitions, 2198 flow [2022-12-13 16:55:54,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 312 transitions, 2155 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 16:55:54,291 INFO L231 Difference]: Finished difference. Result has 145 places, 169 transitions, 1285 flow [2022-12-13 16:55:54,292 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1285, PETRI_PLACES=145, PETRI_TRANSITIONS=169} [2022-12-13 16:55:54,292 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 39 predicate places. [2022-12-13 16:55:54,292 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 169 transitions, 1285 flow [2022-12-13 16:55:54,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 261.3333333333333) internal successors, (1568), 6 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:54,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:54,292 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:54,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 16:55:54,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:55:54,493 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:55:54,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:54,494 INFO L85 PathProgramCache]: Analyzing trace with hash 691669169, now seen corresponding path program 1 times [2022-12-13 16:55:54,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:55:54,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689271941] [2022-12-13 16:55:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:54,495 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:55:54,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:55:54,496 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:55:54,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 16:55:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:54,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:55:54,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:54,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 16:55:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:54,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:55:54,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:55:54,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689271941] [2022-12-13 16:55:54,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689271941] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:55:54,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:55:54,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:55:54,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033939515] [2022-12-13 16:55:54,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:55:54,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:55:54,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:55:54,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:55:54,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:55:54,719 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 610 [2022-12-13 16:55:54,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 169 transitions, 1285 flow. Second operand has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:54,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:54,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 610 [2022-12-13 16:55:54,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:56:04,125 INFO L130 PetriNetUnfolder]: 58222/84236 cut-off events. [2022-12-13 16:56:04,126 INFO L131 PetriNetUnfolder]: For 92492/92506 co-relation queries the response was YES. [2022-12-13 16:56:04,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244884 conditions, 84236 events. 58222/84236 cut-off events. For 92492/92506 co-relation queries the response was YES. Maximal size of possible extension queue 1826. Compared 570929 event pairs, 38841 based on Foata normal form. 8/64333 useless extension candidates. Maximal degree in co-relation 244845. Up to 47102 conditions per place. [2022-12-13 16:56:04,652 INFO L137 encePairwiseOnDemand]: 602/610 looper letters, 141 selfloop transitions, 19 changer transitions 0/217 dead transitions. [2022-12-13 16:56:04,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 217 transitions, 1848 flow [2022-12-13 16:56:04,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:56:04,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:56:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2022-12-13 16:56:04,654 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4961748633879781 [2022-12-13 16:56:04,654 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2022-12-13 16:56:04,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2022-12-13 16:56:04,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:56:04,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2022-12-13 16:56:04,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:04,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:04,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:04,658 INFO L175 Difference]: Start difference. First operand has 145 places, 169 transitions, 1285 flow. Second operand 3 states and 908 transitions. [2022-12-13 16:56:04,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 217 transitions, 1848 flow [2022-12-13 16:56:04,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 217 transitions, 1821 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 16:56:04,751 INFO L231 Difference]: Finished difference. Result has 147 places, 176 transitions, 1408 flow [2022-12-13 16:56:04,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1408, PETRI_PLACES=147, PETRI_TRANSITIONS=176} [2022-12-13 16:56:04,751 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 41 predicate places. [2022-12-13 16:56:04,751 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 176 transitions, 1408 flow [2022-12-13 16:56:04,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:04,752 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:56:04,752 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 16:56:04,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-13 16:56:04,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:56:04,952 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:56:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:56:04,953 INFO L85 PathProgramCache]: Analyzing trace with hash -771848895, now seen corresponding path program 3 times [2022-12-13 16:56:04,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:56:04,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233273761] [2022-12-13 16:56:04,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:56:04,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:56:04,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:56:04,954 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:56:04,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 16:56:05,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 16:56:05,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:56:05,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 16:56:05,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:56:05,179 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 16:56:05,179 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 16:56:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:05,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:56:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:07,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:56:07,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233273761] [2022-12-13 16:56:07,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233273761] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:56:07,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:56:07,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 16:56:07,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033656851] [2022-12-13 16:56:07,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:56:07,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:56:07,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:56:07,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:56:07,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 16:56:27,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 610 [2022-12-13 16:56:27,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 176 transitions, 1408 flow. Second operand has 24 states, 24 states have (on average 272.0) internal successors, (6528), 24 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:27,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:56:27,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 610 [2022-12-13 16:56:27,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:03,290 INFO L130 PetriNetUnfolder]: 53186/76557 cut-off events. [2022-12-13 16:57:03,290 INFO L131 PetriNetUnfolder]: For 106294/106366 co-relation queries the response was YES. [2022-12-13 16:57:03,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232311 conditions, 76557 events. 53186/76557 cut-off events. For 106294/106366 co-relation queries the response was YES. Maximal size of possible extension queue 1759. Compared 505990 event pairs, 36255 based on Foata normal form. 12/58523 useless extension candidates. Maximal degree in co-relation 232272. Up to 69555 conditions per place. [2022-12-13 16:57:03,768 INFO L137 encePairwiseOnDemand]: 602/610 looper letters, 212 selfloop transitions, 80 changer transitions 0/326 dead transitions. [2022-12-13 16:57:03,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 326 transitions, 2960 flow [2022-12-13 16:57:03,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 16:57:03,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 16:57:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 7303 transitions. [2022-12-13 16:57:03,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46046658259773016 [2022-12-13 16:57:03,779 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 7303 transitions. [2022-12-13 16:57:03,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 7303 transitions. [2022-12-13 16:57:03,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:03,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 7303 transitions. [2022-12-13 16:57:03,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 280.88461538461536) internal successors, (7303), 26 states have internal predecessors, (7303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:03,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 610.0) internal successors, (16470), 27 states have internal predecessors, (16470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:03,799 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 610.0) internal successors, (16470), 27 states have internal predecessors, (16470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:03,800 INFO L175 Difference]: Start difference. First operand has 147 places, 176 transitions, 1408 flow. Second operand 26 states and 7303 transitions. [2022-12-13 16:57:03,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 326 transitions, 2960 flow [2022-12-13 16:57:03,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 326 transitions, 2920 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:57:03,874 INFO L231 Difference]: Finished difference. Result has 184 places, 217 transitions, 2185 flow [2022-12-13 16:57:03,874 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2185, PETRI_PLACES=184, PETRI_TRANSITIONS=217} [2022-12-13 16:57:03,874 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 78 predicate places. [2022-12-13 16:57:03,874 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 217 transitions, 2185 flow [2022-12-13 16:57:03,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 272.0) internal successors, (6528), 24 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:03,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:03,875 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:57:03,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 16:57:04,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:57:04,077 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:57:04,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:04,078 INFO L85 PathProgramCache]: Analyzing trace with hash 691669170, now seen corresponding path program 1 times [2022-12-13 16:57:04,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:57:04,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864335607] [2022-12-13 16:57:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:04,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:57:04,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:57:04,082 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:57:04,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 16:57:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:04,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:57:04,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:57:04,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:57:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:04,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:57:04,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:57:04,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864335607] [2022-12-13 16:57:04,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864335607] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:57:04,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:57:04,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:57:04,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345654375] [2022-12-13 16:57:04,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:57:04,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:57:04,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:57:04,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:57:04,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:57:04,564 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 610 [2022-12-13 16:57:04,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 217 transitions, 2185 flow. Second operand has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:04,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:04,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 610 [2022-12-13 16:57:04,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:13,415 INFO L130 PetriNetUnfolder]: 52012/75470 cut-off events. [2022-12-13 16:57:13,415 INFO L131 PetriNetUnfolder]: For 93562/93666 co-relation queries the response was YES. [2022-12-13 16:57:13,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224929 conditions, 75470 events. 52012/75470 cut-off events. For 93562/93666 co-relation queries the response was YES. Maximal size of possible extension queue 1758. Compared 506873 event pairs, 35453 based on Foata normal form. 1815/58907 useless extension candidates. Maximal degree in co-relation 224875. Up to 51449 conditions per place. [2022-12-13 16:57:14,045 INFO L137 encePairwiseOnDemand]: 606/610 looper letters, 148 selfloop transitions, 11 changer transitions 0/247 dead transitions. [2022-12-13 16:57:14,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 247 transitions, 2658 flow [2022-12-13 16:57:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:57:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:57:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 918 transitions. [2022-12-13 16:57:14,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5016393442622951 [2022-12-13 16:57:14,048 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 918 transitions. [2022-12-13 16:57:14,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 918 transitions. [2022-12-13 16:57:14,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:14,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 918 transitions. [2022-12-13 16:57:14,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:14,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:14,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:14,051 INFO L175 Difference]: Start difference. First operand has 184 places, 217 transitions, 2185 flow. Second operand 3 states and 918 transitions. [2022-12-13 16:57:14,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 247 transitions, 2658 flow [2022-12-13 16:57:14,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 247 transitions, 2570 flow, removed 23 selfloop flow, removed 10 redundant places. [2022-12-13 16:57:14,145 INFO L231 Difference]: Finished difference. Result has 174 places, 215 transitions, 2115 flow [2022-12-13 16:57:14,145 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2115, PETRI_PLACES=174, PETRI_TRANSITIONS=215} [2022-12-13 16:57:14,145 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 68 predicate places. [2022-12-13 16:57:14,145 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 215 transitions, 2115 flow [2022-12-13 16:57:14,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:14,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:14,145 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:57:14,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 16:57:14,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:57:14,347 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:57:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1851072285, now seen corresponding path program 1 times [2022-12-13 16:57:14,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:57:14,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699994160] [2022-12-13 16:57:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:14,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:57:14,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:57:14,352 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:57:14,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 16:57:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:14,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 16:57:14,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:57:14,694 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 16:57:14,694 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 16:57:14,774 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 15 treesize of output 11 [2022-12-13 16:57:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:14,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:57:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:15,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:57:15,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699994160] [2022-12-13 16:57:15,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699994160] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:57:15,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:57:15,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 16:57:15,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219471725] [2022-12-13 16:57:15,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:57:15,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 16:57:15,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:57:15,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 16:57:15,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:57:18,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 610 [2022-12-13 16:57:18,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 215 transitions, 2115 flow. Second operand has 12 states, 12 states have (on average 267.6666666666667) internal successors, (3212), 12 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:18,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:18,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 610 [2022-12-13 16:57:18,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:32,709 INFO L130 PetriNetUnfolder]: 68797/99456 cut-off events. [2022-12-13 16:57:32,709 INFO L131 PetriNetUnfolder]: For 148240/148362 co-relation queries the response was YES. [2022-12-13 16:57:33,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297341 conditions, 99456 events. 68797/99456 cut-off events. For 148240/148362 co-relation queries the response was YES. Maximal size of possible extension queue 2191. Compared 683825 event pairs, 38950 based on Foata normal form. 1522/78624 useless extension candidates. Maximal degree in co-relation 297287. Up to 34812 conditions per place. [2022-12-13 16:57:33,476 INFO L137 encePairwiseOnDemand]: 595/610 looper letters, 369 selfloop transitions, 33 changer transitions 0/434 dead transitions. [2022-12-13 16:57:33,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 434 transitions, 4146 flow [2022-12-13 16:57:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 16:57:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 16:57:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3697 transitions. [2022-12-13 16:57:33,482 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4662042875157629 [2022-12-13 16:57:33,482 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3697 transitions. [2022-12-13 16:57:33,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3697 transitions. [2022-12-13 16:57:33,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:33,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3697 transitions. [2022-12-13 16:57:33,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 284.38461538461536) internal successors, (3697), 13 states have internal predecessors, (3697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:33,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 610.0) internal successors, (8540), 14 states have internal predecessors, (8540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:33,493 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 610.0) internal successors, (8540), 14 states have internal predecessors, (8540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:33,493 INFO L175 Difference]: Start difference. First operand has 174 places, 215 transitions, 2115 flow. Second operand 13 states and 3697 transitions. [2022-12-13 16:57:33,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 434 transitions, 4146 flow [2022-12-13 16:57:33,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 434 transitions, 4094 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:57:33,635 INFO L231 Difference]: Finished difference. Result has 188 places, 230 transitions, 2415 flow [2022-12-13 16:57:33,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2415, PETRI_PLACES=188, PETRI_TRANSITIONS=230} [2022-12-13 16:57:33,635 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 82 predicate places. [2022-12-13 16:57:33,635 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 230 transitions, 2415 flow [2022-12-13 16:57:33,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 267.6666666666667) internal successors, (3212), 12 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:33,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:33,636 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:57:33,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-12-13 16:57:33,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:57:33,838 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 16:57:33,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:33,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1884155680, now seen corresponding path program 2 times [2022-12-13 16:57:33,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 16:57:33,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912290940] [2022-12-13 16:57:33,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:57:33,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 16:57:33,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 16:57:33,845 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 16:57:33,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 16:57:34,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:57:34,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:57:34,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 16:57:34,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:57:34,145 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 16:57:34,145 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 16:57:34,188 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 16:57:34,188 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 16:57:34,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:57:34,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 16:57:34,303 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 16:57:34,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 16:57:34,340 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 16:57:34,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-12-13 16:57:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:34,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:57:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:43,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 16:57:43,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912290940] [2022-12-13 16:57:43,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912290940] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:57:43,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:57:43,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 16:57:43,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303617274] [2022-12-13 16:57:43,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:57:43,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 16:57:43,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 16:57:43,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 16:57:43,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=248, Unknown=3, NotChecked=0, Total=306 [2022-12-13 16:57:46,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:57:49,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:57:52,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:57:54,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:57:57,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:57:59,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:02,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:05,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:07,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:09,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:12,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:14,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:17,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:19,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:22,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:25,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:28,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:31,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:33,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:36,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:38,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:41,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:43,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:46,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:48,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:51,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:54,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:56,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:59,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:02,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:05,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:07,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:10,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:13,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:15,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:18,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:21,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:24,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:26,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:29,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:31,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:35,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:38,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:41,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:43,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:46,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:48,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:51,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:53,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:56,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:59,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:00:01,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:00:04,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:00:06,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:00:09,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:00:11,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:00:12,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 610 [2022-12-13 17:00:12,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 230 transitions, 2415 flow. Second operand has 18 states, 18 states have (on average 202.33333333333334) internal successors, (3642), 18 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:12,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:00:12,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 610 [2022-12-13 17:00:12,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:00:49,344 INFO L130 PetriNetUnfolder]: 135602/183825 cut-off events. [2022-12-13 17:00:49,344 INFO L131 PetriNetUnfolder]: For 268156/268194 co-relation queries the response was YES. [2022-12-13 17:00:50,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577743 conditions, 183825 events. 135602/183825 cut-off events. For 268156/268194 co-relation queries the response was YES. Maximal size of possible extension queue 3360. Compared 1183518 event pairs, 50842 based on Foata normal form. 32/142686 useless extension candidates. Maximal degree in co-relation 577684. Up to 43946 conditions per place. [2022-12-13 17:00:50,862 INFO L137 encePairwiseOnDemand]: 592/610 looper letters, 683 selfloop transitions, 113 changer transitions 0/807 dead transitions. [2022-12-13 17:00:50,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 807 transitions, 6668 flow [2022-12-13 17:00:50,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:00:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 17:00:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3418 transitions. [2022-12-13 17:00:50,867 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40023419203747074 [2022-12-13 17:00:50,867 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3418 transitions. [2022-12-13 17:00:50,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3418 transitions. [2022-12-13 17:00:50,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:00:50,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3418 transitions. [2022-12-13 17:00:50,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 244.14285714285714) internal successors, (3418), 14 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:50,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 610.0) internal successors, (9150), 15 states have internal predecessors, (9150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:50,876 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 610.0) internal successors, (9150), 15 states have internal predecessors, (9150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:50,877 INFO L175 Difference]: Start difference. First operand has 188 places, 230 transitions, 2415 flow. Second operand 14 states and 3418 transitions. [2022-12-13 17:00:50,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 807 transitions, 6668 flow [2022-12-13 17:00:51,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 807 transitions, 6573 flow, removed 15 selfloop flow, removed 5 redundant places. [2022-12-13 17:00:51,322 INFO L231 Difference]: Finished difference. Result has 201 places, 279 transitions, 3227 flow [2022-12-13 17:00:51,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3227, PETRI_PLACES=201, PETRI_TRANSITIONS=279} [2022-12-13 17:00:51,322 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 95 predicate places. [2022-12-13 17:00:51,323 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 279 transitions, 3227 flow [2022-12-13 17:00:51,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 202.33333333333334) internal successors, (3642), 18 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:51,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:00:51,323 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:00:51,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 17:00:51,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:00:51,524 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 17:00:51,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:00:51,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1720713283, now seen corresponding path program 1 times [2022-12-13 17:00:51,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:00:51,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461485492] [2022-12-13 17:00:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:00:51,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:00:51,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:00:51,530 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:00:51,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 17:00:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:00:51,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 17:00:51,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:00:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 17:00:51,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:00:51,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:00:51,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461485492] [2022-12-13 17:00:51,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461485492] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:00:51,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:00:51,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:00:51,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783414972] [2022-12-13 17:00:51,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:00:51,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:00:51,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:00:51,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:00:51,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:00:51,898 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 610 [2022-12-13 17:00:51,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 279 transitions, 3227 flow. Second operand has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:51,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:00:51,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 610 [2022-12-13 17:00:51,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:01:10,034 INFO L130 PetriNetUnfolder]: 92386/132295 cut-off events. [2022-12-13 17:01:10,034 INFO L131 PetriNetUnfolder]: For 257871/258981 co-relation queries the response was YES. [2022-12-13 17:01:10,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407743 conditions, 132295 events. 92386/132295 cut-off events. For 257871/258981 co-relation queries the response was YES. Maximal size of possible extension queue 3635. Compared 940226 event pairs, 32606 based on Foata normal form. 3531/107827 useless extension candidates. Maximal degree in co-relation 407680. Up to 67872 conditions per place. [2022-12-13 17:01:11,271 INFO L137 encePairwiseOnDemand]: 598/610 looper letters, 169 selfloop transitions, 81 changer transitions 0/354 dead transitions. [2022-12-13 17:01:11,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 354 transitions, 4408 flow [2022-12-13 17:01:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:01:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:01:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 916 transitions. [2022-12-13 17:01:11,273 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5005464480874317 [2022-12-13 17:01:11,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 916 transitions. [2022-12-13 17:01:11,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 916 transitions. [2022-12-13 17:01:11,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:01:11,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 916 transitions. [2022-12-13 17:01:11,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:11,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:11,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:11,276 INFO L175 Difference]: Start difference. First operand has 201 places, 279 transitions, 3227 flow. Second operand 3 states and 916 transitions. [2022-12-13 17:01:11,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 354 transitions, 4408 flow [2022-12-13 17:01:12,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 354 transitions, 4196 flow, removed 83 selfloop flow, removed 1 redundant places. [2022-12-13 17:01:12,208 INFO L231 Difference]: Finished difference. Result has 204 places, 318 transitions, 3978 flow [2022-12-13 17:01:12,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=3011, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3978, PETRI_PLACES=204, PETRI_TRANSITIONS=318} [2022-12-13 17:01:12,208 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 98 predicate places. [2022-12-13 17:01:12,209 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 318 transitions, 3978 flow [2022-12-13 17:01:12,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:12,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:01:12,209 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:01:12,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 17:01:12,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:01:12,410 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread5Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 17:01:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:01:12,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1708826689, now seen corresponding path program 1 times [2022-12-13 17:01:12,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:01:12,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101240821] [2022-12-13 17:01:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:01:12,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:01:12,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:01:12,416 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:01:12,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 17:01:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:01:12,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 17:01:12,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:01:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:01:12,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:01:12,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:01:12,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101240821] [2022-12-13 17:01:12,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101240821] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:01:12,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:01:12,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:01:12,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728559943] [2022-12-13 17:01:12,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:01:12,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:01:12,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:01:12,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:01:12,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:01:12,807 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 610 [2022-12-13 17:01:12,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 318 transitions, 3978 flow. Second operand has 4 states, 4 states have (on average 280.75) internal successors, (1123), 4 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:12,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:01:12,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 610 [2022-12-13 17:01:12,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:01:31,676 INFO L130 PetriNetUnfolder]: 86348/129339 cut-off events. [2022-12-13 17:01:31,676 INFO L131 PetriNetUnfolder]: For 403395/403861 co-relation queries the response was YES. [2022-12-13 17:01:32,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422652 conditions, 129339 events. 86348/129339 cut-off events. For 403395/403861 co-relation queries the response was YES. Maximal size of possible extension queue 3708. Compared 991818 event pairs, 58565 based on Foata normal form. 445/104258 useless extension candidates. Maximal degree in co-relation 422587. Up to 112827 conditions per place. [2022-12-13 17:01:32,859 INFO L137 encePairwiseOnDemand]: 602/610 looper letters, 229 selfloop transitions, 3 changer transitions 0/336 dead transitions. [2022-12-13 17:01:32,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 336 transitions, 4386 flow [2022-12-13 17:01:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:01:32,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:01:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1199 transitions. [2022-12-13 17:01:32,861 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4913934426229508 [2022-12-13 17:01:32,861 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1199 transitions. [2022-12-13 17:01:32,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1199 transitions. [2022-12-13 17:01:32,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:01:32,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1199 transitions. [2022-12-13 17:01:32,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 299.75) internal successors, (1199), 4 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:32,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:32,865 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:32,865 INFO L175 Difference]: Start difference. First operand has 204 places, 318 transitions, 3978 flow. Second operand 4 states and 1199 transitions. [2022-12-13 17:01:32,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 336 transitions, 4386 flow [2022-12-13 17:01:35,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 336 transitions, 4210 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-12-13 17:01:35,581 INFO L231 Difference]: Finished difference. Result has 205 places, 312 transitions, 3695 flow [2022-12-13 17:01:35,581 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=3680, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3695, PETRI_PLACES=205, PETRI_TRANSITIONS=312} [2022-12-13 17:01:35,581 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 99 predicate places. [2022-12-13 17:01:35,581 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 312 transitions, 3695 flow [2022-12-13 17:01:35,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 280.75) internal successors, (1123), 4 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:35,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:01:35,582 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:01:35,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-13 17:01:35,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:01:35,783 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread5Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 17:01:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:01:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1880876766, now seen corresponding path program 1 times [2022-12-13 17:01:35,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:01:35,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345156409] [2022-12-13 17:01:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:01:35,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:01:35,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:01:35,789 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:01:35,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 17:01:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:01:35,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 17:01:35,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:01:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:01:36,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:01:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:01:36,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:01:36,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345156409] [2022-12-13 17:01:36,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345156409] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:01:36,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:01:36,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 17:01:36,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998987464] [2022-12-13 17:01:36,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:01:36,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:01:36,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:01:36,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:01:36,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:01:36,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 610 [2022-12-13 17:01:36,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 312 transitions, 3695 flow. Second operand has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:36,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:01:36,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 610 [2022-12-13 17:01:36,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:01:53,607 INFO L130 PetriNetUnfolder]: 75476/112128 cut-off events. [2022-12-13 17:01:53,608 INFO L131 PetriNetUnfolder]: For 316525/316957 co-relation queries the response was YES. [2022-12-13 17:01:54,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370394 conditions, 112128 events. 75476/112128 cut-off events. For 316525/316957 co-relation queries the response was YES. Maximal size of possible extension queue 3348. Compared 833456 event pairs, 47279 based on Foata normal form. 1737/100811 useless extension candidates. Maximal degree in co-relation 370328. Up to 76508 conditions per place. [2022-12-13 17:01:54,646 INFO L137 encePairwiseOnDemand]: 599/610 looper letters, 245 selfloop transitions, 42 changer transitions 0/391 dead transitions. [2022-12-13 17:01:54,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 391 transitions, 4476 flow [2022-12-13 17:01:54,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:01:54,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:01:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2618 transitions. [2022-12-13 17:01:54,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4768670309653916 [2022-12-13 17:01:54,650 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2618 transitions. [2022-12-13 17:01:54,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2618 transitions. [2022-12-13 17:01:54,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:01:54,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2618 transitions. [2022-12-13 17:01:54,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 290.8888888888889) internal successors, (2618), 9 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:54,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 610.0) internal successors, (6100), 10 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:54,656 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 610.0) internal successors, (6100), 10 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:54,656 INFO L175 Difference]: Start difference. First operand has 205 places, 312 transitions, 3695 flow. Second operand 9 states and 2618 transitions. [2022-12-13 17:01:54,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 391 transitions, 4476 flow [2022-12-13 17:01:55,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 391 transitions, 4403 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-12-13 17:01:55,006 INFO L231 Difference]: Finished difference. Result has 209 places, 303 transitions, 3597 flow [2022-12-13 17:01:55,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3597, PETRI_PLACES=209, PETRI_TRANSITIONS=303} [2022-12-13 17:01:55,006 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, 103 predicate places. [2022-12-13 17:01:55,006 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 303 transitions, 3597 flow [2022-12-13 17:01:55,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:01:55,007 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:01:55,007 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:01:55,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-13 17:01:55,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:01:55,208 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-12-13 17:01:55,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:01:55,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1720713284, now seen corresponding path program 3 times [2022-12-13 17:01:55,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:01:55,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133374065] [2022-12-13 17:01:55,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:01:55,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:01:55,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:01:55,215 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:01:55,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7746ed2e-6cbf-4074-98fa-5383252cd934/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 17:01:55,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 17:01:55,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:01:55,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:01:55,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:01:55,430 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-12-13 17:01:55,430 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 2 case distinctions, treesize of input 16 treesize of output 31 [2022-12-13 17:01:55,498 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 17:01:55,499 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 17:01:55,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:01:55,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 17:01:55,797 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 17:01:55,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 17:01:55,852 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:01:55,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-13 17:01:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:01:56,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:02:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:02:02,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:02:02,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133374065] [2022-12-13 17:02:02,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133374065] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:02:02,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:02:02,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 17:02:02,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023735257] [2022-12-13 17:02:02,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:02:02,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 17:02:02,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:02:02,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 17:02:02,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=133, Unknown=2, NotChecked=0, Total=182 [2022-12-13 17:02:04,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:06,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:09,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:12,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:14,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:16,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:18,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:20,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:22,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:25,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:27,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:29,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:32,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:34,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:36,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:38,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:40,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:43,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:45,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:48,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:50,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:53,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:55,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:57,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:00,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:02,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:04,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:07,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:09,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:11,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:15,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:17,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:19,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:19,575 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 610 [2022-12-13 17:03:19,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 303 transitions, 3597 flow. Second operand has 14 states, 14 states have (on average 225.57142857142858) internal successors, (3158), 14 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:03:19,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:03:19,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 610 [2022-12-13 17:03:19,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:03:46,455 WARN L233 SmtUtils]: Spent 25.10s on a formula simplification. DAG size of input: 84 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:04:03,983 WARN L233 SmtUtils]: Spent 16.50s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:04:10,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:04:13,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:04:17,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:04:25,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:04:48,442 WARN L233 SmtUtils]: Spent 20.41s on a formula simplification. DAG size of input: 69 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:04:50,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:04:56,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:05:16,764 WARN L233 SmtUtils]: Spent 16.45s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:05:20,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:05:24,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:05:28,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:05:56,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]