./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:01:09,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:01:09,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:01:09,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:01:09,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:01:09,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:01:09,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:01:09,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:01:09,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:01:09,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:01:09,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:01:09,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:01:09,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:01:09,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:01:09,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:01:09,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:01:09,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:01:09,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:01:09,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:01:09,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:01:09,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:01:09,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:01:09,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:01:09,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:01:09,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:01:09,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:01:09,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:01:09,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:01:09,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:01:09,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:01:09,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:01:09,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:01:09,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:01:09,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:01:09,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:01:09,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:01:09,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:01:09,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:01:09,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:01:09,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:01:09,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:01:09,249 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:01:09,287 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:01:09,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:01:09,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:01:09,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:01:09,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:01:09,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:01:09,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:01:09,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:01:09,290 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:01:09,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:01:09,295 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:01:09,295 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:01:09,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:01:09,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:01:09,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:01:09,296 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:01:09,296 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:01:09,296 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:01:09,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:01:09,297 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:01:09,297 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:01:09,297 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:01:09,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:01:09,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:01:09,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:01:09,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:01:09,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:01:09,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:01:09,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:01:09,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:01:09,300 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:01:09,301 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:01:09,301 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:01:09,301 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_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2022-11-25 18:01:09,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:01:09,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:01:09,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:01:09,678 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:01:09,678 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:01:09,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-25 18:01:12,899 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:01:13,105 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:01:13,105 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-25 18:01:13,114 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/data/46bef884e/b38f81624a8a43bc8a1c505cf1b59f29/FLAG13a1dfb7f [2022-11-25 18:01:13,131 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/data/46bef884e/b38f81624a8a43bc8a1c505cf1b59f29 [2022-11-25 18:01:13,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:01:13,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:01:13,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:01:13,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:01:13,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:01:13,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:01:13" (1/1) ... [2022-11-25 18:01:13,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@779bd6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:13, skipping insertion in model container [2022-11-25 18:01:13,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:01:13" (1/1) ... [2022-11-25 18:01:13,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:01:13,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:01:13,418 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:01:13,422 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:01:13,427 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:01:13,430 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:01:13,439 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_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-25 18:01:13,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:01:13,462 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-25 18:01:13,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2067ed3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:13, skipping insertion in model container [2022-11-25 18:01:13,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:01:13,463 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 18:01:13,465 INFO L158 Benchmark]: Toolchain (without parser) took 328.05ms. Allocated memory is still 159.4MB. Free memory was 123.3MB in the beginning and 128.2MB in the end (delta: -4.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-25 18:01:13,465 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 125.8MB. Free memory is still 94.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:01:13,466 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.14ms. Allocated memory is still 159.4MB. Free memory was 123.3MB in the beginning and 128.2MB in the end (delta: -4.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-25 18:01:13,467 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 125.8MB. Free memory is still 94.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 325.14ms. Allocated memory is still 159.4MB. Free memory was 123.3MB in the beginning and 128.2MB in the end (delta: -4.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 97]: 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_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:01:16,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:01:16,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:01:16,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:01:16,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:01:16,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:01:16,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:01:16,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:01:16,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:01:16,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:01:16,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:01:16,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:01:16,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:01:16,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:01:16,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:01:16,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:01:16,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:01:16,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:01:16,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:01:16,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:01:16,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:01:16,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:01:16,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:01:16,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:01:16,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:01:16,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:01:16,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:01:16,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:01:16,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:01:16,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:01:16,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:01:16,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:01:16,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:01:16,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:01:16,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:01:16,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:01:16,183 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:01:16,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:01:16,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:01:16,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:01:16,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:01:16,187 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 18:01:16,224 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:01:16,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:01:16,225 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:01:16,225 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:01:16,226 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:01:16,227 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:01:16,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:01:16,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:01:16,228 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:01:16,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:01:16,229 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:01:16,229 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:01:16,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:01:16,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:01:16,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:01:16,230 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:01:16,230 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:01:16,231 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:01:16,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:01:16,231 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:01:16,232 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 18:01:16,232 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 18:01:16,232 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:01:16,233 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:01:16,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:01:16,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:01:16,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:01:16,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:01:16,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:01:16,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:01:16,235 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 18:01:16,235 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 18:01:16,235 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:01:16,236 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:01:16,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:01:16,236 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 18:01:16,237 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_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2022-11-25 18:01:16,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:01:16,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:01:16,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:01:16,695 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:01:16,695 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:01:16,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-25 18:01:20,240 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:01:20,475 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:01:20,476 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-25 18:01:20,487 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/data/85159ad5d/4e9687b30ee9445390cfae0259746a12/FLAG963ae3da8 [2022-11-25 18:01:20,500 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/data/85159ad5d/4e9687b30ee9445390cfae0259746a12 [2022-11-25 18:01:20,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:01:20,503 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:01:20,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:01:20,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:01:20,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:01:20,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:01:20" (1/1) ... [2022-11-25 18:01:20,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@576fbac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:20, skipping insertion in model container [2022-11-25 18:01:20,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:01:20" (1/1) ... [2022-11-25 18:01:20,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:01:20,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:01:20,750 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:01:20,759 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:01:20,764 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:01:20,774 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:01:20,791 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_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-25 18:01:20,813 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:01:20,837 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 18:01:20,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:01:20,862 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:01:20,870 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:01:20,879 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:01:20,883 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:01:20,890 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_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-25 18:01:20,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:01:20,905 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:01:20,928 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:01:20,936 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:01:20,938 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:01:20,944 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:01:20,954 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_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-25 18:01:20,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:01:20,981 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:01:20,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:20 WrapperNode [2022-11-25 18:01:20,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:01:20,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:01:20,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:01:20,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:01:20,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:20" (1/1) ... [2022-11-25 18:01:21,018 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:20" (1/1) ... [2022-11-25 18:01:21,064 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 188 [2022-11-25 18:01:21,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:01:21,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:01:21,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:01:21,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:01:21,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:20" (1/1) ... [2022-11-25 18:01:21,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:20" (1/1) ... [2022-11-25 18:01:21,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:20" (1/1) ... [2022-11-25 18:01:21,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:20" (1/1) ... [2022-11-25 18:01:21,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:20" (1/1) ... [2022-11-25 18:01:21,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:20" (1/1) ... [2022-11-25 18:01:21,129 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:20" (1/1) ... [2022-11-25 18:01:21,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:20" (1/1) ... [2022-11-25 18:01:21,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:01:21,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:01:21,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:01:21,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:01:21,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:20" (1/1) ... [2022-11-25 18:01:21,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:01:21,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:01:21,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:01:21,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:01:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:01:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 18:01:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:01:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 18:01:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:01:21,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:01:21,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:01:21,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:01:21,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:01:21,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:01:21,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:01:21,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:01:21,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:01:21,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:01:21,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 18:01:21,252 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:01:21,396 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:01:21,398 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:01:22,276 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:01:22,772 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:01:22,772 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 18:01:22,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:01:22 BoogieIcfgContainer [2022-11-25 18:01:22,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:01:22,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:01:22,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:01:22,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:01:22,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:01:20" (1/3) ... [2022-11-25 18:01:22,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d51ca65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:01:22, skipping insertion in model container [2022-11-25 18:01:22,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:20" (2/3) ... [2022-11-25 18:01:22,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d51ca65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:01:22, skipping insertion in model container [2022-11-25 18:01:22,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:01:22" (3/3) ... [2022-11-25 18:01:22,792 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2022-11-25 18:01:22,815 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:01:22,815 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-11-25 18:01:22,815 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:01:23,002 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:01:23,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 196 transitions, 408 flow [2022-11-25 18:01:23,204 INFO L130 PetriNetUnfolder]: 13/194 cut-off events. [2022-11-25 18:01:23,205 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:01:23,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 194 events. 13/194 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 255 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 142. Up to 2 conditions per place. [2022-11-25 18:01:23,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 196 transitions, 408 flow [2022-11-25 18:01:23,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 189 transitions, 390 flow [2022-11-25 18:01:23,231 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:01:23,265 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 189 transitions, 390 flow [2022-11-25 18:01:23,268 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 189 transitions, 390 flow [2022-11-25 18:01:23,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 189 transitions, 390 flow [2022-11-25 18:01:23,343 INFO L130 PetriNetUnfolder]: 13/189 cut-off events. [2022-11-25 18:01:23,344 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:01:23,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 189 events. 13/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 258 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 142. Up to 2 conditions per place. [2022-11-25 18:01:23,349 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2022-11-25 18:02:02,190 INFO L134 LiptonReduction]: Checked pairs total: 2314 [2022-11-25 18:02:02,190 INFO L136 LiptonReduction]: Total number of compositions: 202 [2022-11-25 18:02:02,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:02:02,214 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;@65463a35, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:02:02,215 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2022-11-25 18:02:02,218 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 18:02:02,218 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:02:02,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:02,219 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:02:02,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:02:02,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:02,225 INFO L85 PathProgramCache]: Analyzing trace with hash 30239, now seen corresponding path program 1 times [2022-11-25 18:02:02,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:02,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310294825] [2022-11-25 18:02:02,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:02,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:02,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:02,252 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:02:02,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 18:02:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:02:02,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:02,577 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:02:02,578 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 [2022-11-25 18:02:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:02,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:02,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:02:02,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310294825] [2022-11-25 18:02:02,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310294825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:02,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:02,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:02:02,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551420164] [2022-11-25 18:02:02,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:02,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:02,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:02:02,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:02,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:02,954 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 398 [2022-11-25 18:02:02,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:02,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:02,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 398 [2022-11-25 18:02:02,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:03,839 INFO L130 PetriNetUnfolder]: 1305/1829 cut-off events. [2022-11-25 18:02:03,840 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-25 18:02:03,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3695 conditions, 1829 events. 1305/1829 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 8974 event pairs, 615 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 1673. Up to 913 conditions per place. [2022-11-25 18:02:03,854 INFO L137 encePairwiseOnDemand]: 379/398 looper letters, 67 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2022-11-25 18:02:03,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 73 transitions, 312 flow [2022-11-25 18:02:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:03,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2022-11-25 18:02:03,871 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45979899497487436 [2022-11-25 18:02:03,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2022-11-25 18:02:03,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2022-11-25 18:02:03,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:03,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2022-11-25 18:02:03,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:03,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:03,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:03,916 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 116 flow. Second operand 3 states and 549 transitions. [2022-11-25 18:02:03,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 73 transitions, 312 flow [2022-11-25 18:02:03,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 296 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:03,927 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 114 flow [2022-11-25 18:02:03,930 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2022-11-25 18:02:03,934 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2022-11-25 18:02:03,935 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 114 flow [2022-11-25 18:02:03,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:03,936 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:03,936 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:02:03,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:04,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:04,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:02:04,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:04,138 INFO L85 PathProgramCache]: Analyzing trace with hash 30238, now seen corresponding path program 1 times [2022-11-25 18:02:04,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:04,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115823832] [2022-11-25 18:02:04,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:04,139 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:04,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:04,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:02:04,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 18:02:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:04,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:02:04,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:04,282 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:02:04,282 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 [2022-11-25 18:02:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:04,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:04,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:02:04,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115823832] [2022-11-25 18:02:04,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115823832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:04,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:04,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:02:04,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560532468] [2022-11-25 18:02:04,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:04,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:04,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:02:04,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:04,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:04,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 398 [2022-11-25 18:02:04,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:04,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:04,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 398 [2022-11-25 18:02:04,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:04,975 INFO L130 PetriNetUnfolder]: 1319/1839 cut-off events. [2022-11-25 18:02:04,975 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:02:04,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3697 conditions, 1839 events. 1319/1839 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 8998 event pairs, 618 based on Foata normal form. 2/405 useless extension candidates. Maximal degree in co-relation 1837. Up to 1825 conditions per place. [2022-11-25 18:02:04,989 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 37 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-11-25 18:02:04,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 186 flow [2022-11-25 18:02:04,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:04,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:04,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2022-11-25 18:02:04,992 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40787269681742044 [2022-11-25 18:02:04,992 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2022-11-25 18:02:04,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2022-11-25 18:02:04,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:04,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2022-11-25 18:02:04,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:04,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:04,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:04,999 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 114 flow. Second operand 3 states and 487 transitions. [2022-11-25 18:02:04,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 186 flow [2022-11-25 18:02:05,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:02:05,001 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 104 flow [2022-11-25 18:02:05,002 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2022-11-25 18:02:05,002 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2022-11-25 18:02:05,003 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 104 flow [2022-11-25 18:02:05,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:05,003 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:05,004 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:02:05,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:05,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:05,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:02:05,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:05,217 INFO L85 PathProgramCache]: Analyzing trace with hash 941081, now seen corresponding path program 1 times [2022-11-25 18:02:05,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:05,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76227733] [2022-11-25 18:02:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:05,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:05,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:05,220 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:02:05,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 18:02:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:05,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:02:05,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:05,412 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:02:05,413 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 [2022-11-25 18:02:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:05,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:05,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:02:05,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76227733] [2022-11-25 18:02:05,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76227733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:05,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:02:05,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 18:02:05,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870646703] [2022-11-25 18:02:05,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:05,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:02:05,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:02:05,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:02:05,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:02:06,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 398 [2022-11-25 18:02:06,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 104 flow. Second operand has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:06,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:06,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 398 [2022-11-25 18:02:06,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:08,886 INFO L130 PetriNetUnfolder]: 1958/2741 cut-off events. [2022-11-25 18:02:08,887 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:02:08,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5506 conditions, 2741 events. 1958/2741 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 14049 event pairs, 921 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 5498. Up to 914 conditions per place. [2022-11-25 18:02:08,905 INFO L137 encePairwiseOnDemand]: 389/398 looper letters, 92 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2022-11-25 18:02:08,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 113 transitions, 498 flow [2022-11-25 18:02:08,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:02:08,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:02:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 957 transitions. [2022-11-25 18:02:08,910 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4007537688442211 [2022-11-25 18:02:08,910 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 957 transitions. [2022-11-25 18:02:08,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 957 transitions. [2022-11-25 18:02:08,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:08,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 957 transitions. [2022-11-25 18:02:08,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.5) internal successors, (957), 6 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:08,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 398.0) internal successors, (2786), 7 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:08,924 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 398.0) internal successors, (2786), 7 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:08,924 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 104 flow. Second operand 6 states and 957 transitions. [2022-11-25 18:02:08,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 113 transitions, 498 flow [2022-11-25 18:02:08,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 113 transitions, 497 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:08,935 INFO L231 Difference]: Finished difference. Result has 48 places, 55 transitions, 248 flow [2022-11-25 18:02:08,935 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=248, PETRI_PLACES=48, PETRI_TRANSITIONS=55} [2022-11-25 18:02:08,937 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2022-11-25 18:02:08,937 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 248 flow [2022-11-25 18:02:08,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:08,938 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:08,938 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:02:08,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:09,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:09,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:02:09,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:09,153 INFO L85 PathProgramCache]: Analyzing trace with hash 942401, now seen corresponding path program 1 times [2022-11-25 18:02:09,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:09,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809465227] [2022-11-25 18:02:09,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:09,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:09,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:09,156 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:02:09,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 18:02:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:09,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:02:09,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:09,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:09,345 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 18:02:09,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-25 18:02:09,430 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 18:02:09,430 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 [2022-11-25 18:02:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:09,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:09,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:02:09,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809465227] [2022-11-25 18:02:09,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809465227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:09,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:09,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:02:09,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948801668] [2022-11-25 18:02:09,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:09,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:09,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:02:09,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:09,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:09,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 398 [2022-11-25 18:02:09,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 55 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:09,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:09,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 398 [2022-11-25 18:02:09,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:10,341 INFO L130 PetriNetUnfolder]: 1498/2131 cut-off events. [2022-11-25 18:02:10,341 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-25 18:02:10,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4343 conditions, 2131 events. 1498/2131 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 11012 event pairs, 693 based on Foata normal form. 0/529 useless extension candidates. Maximal degree in co-relation 4330. Up to 2110 conditions per place. [2022-11-25 18:02:10,355 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 48 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2022-11-25 18:02:10,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 326 flow [2022-11-25 18:02:10,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:10,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2022-11-25 18:02:10,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4137353433835846 [2022-11-25 18:02:10,364 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2022-11-25 18:02:10,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2022-11-25 18:02:10,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:10,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2022-11-25 18:02:10,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:10,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:10,376 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:10,376 INFO L175 Difference]: Start difference. First operand has 48 places, 55 transitions, 248 flow. Second operand 3 states and 494 transitions. [2022-11-25 18:02:10,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 326 flow [2022-11-25 18:02:10,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 307 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:10,383 INFO L231 Difference]: Finished difference. Result has 47 places, 51 transitions, 211 flow [2022-11-25 18:02:10,383 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=47, PETRI_TRANSITIONS=51} [2022-11-25 18:02:10,384 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -8 predicate places. [2022-11-25 18:02:10,385 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 51 transitions, 211 flow [2022-11-25 18:02:10,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:10,385 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:10,386 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:02:10,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:10,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:10,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:02:10,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:10,599 INFO L85 PathProgramCache]: Analyzing trace with hash 942400, now seen corresponding path program 1 times [2022-11-25 18:02:10,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:10,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342061500] [2022-11-25 18:02:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:10,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:10,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:10,601 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:02:10,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 18:02:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:10,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:02:10,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:10,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:10,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:10,779 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:02:10,779 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 [2022-11-25 18:02:10,794 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 [2022-11-25 18:02:10,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:10,847 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 [2022-11-25 18:02:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:10,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:10,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:02:10,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342061500] [2022-11-25 18:02:10,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342061500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:10,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:10,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:10,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897294908] [2022-11-25 18:02:10,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:10,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:10,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:02:10,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:10,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:11,094 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 398 [2022-11-25 18:02:11,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 51 transitions, 211 flow. Second operand has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:11,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 398 [2022-11-25 18:02:11,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:11,611 INFO L130 PetriNetUnfolder]: 1010/1493 cut-off events. [2022-11-25 18:02:11,612 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:02:11,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3048 conditions, 1493 events. 1010/1493 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 7696 event pairs, 459 based on Foata normal form. 0/445 useless extension candidates. Maximal degree in co-relation 3034. Up to 1472 conditions per place. [2022-11-25 18:02:11,621 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 44 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2022-11-25 18:02:11,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 281 flow [2022-11-25 18:02:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2022-11-25 18:02:11,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4120603015075377 [2022-11-25 18:02:11,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2022-11-25 18:02:11,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2022-11-25 18:02:11,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:11,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2022-11-25 18:02:11,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,636 INFO L175 Difference]: Start difference. First operand has 47 places, 51 transitions, 211 flow. Second operand 3 states and 492 transitions. [2022-11-25 18:02:11,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 281 flow [2022-11-25 18:02:11,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:11,640 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 192 flow [2022-11-25 18:02:11,640 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2022-11-25 18:02:11,643 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -9 predicate places. [2022-11-25 18:02:11,644 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 192 flow [2022-11-25 18:02:11,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:11,645 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:02:11,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:11,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:11,858 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:02:11,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:11,859 INFO L85 PathProgramCache]: Analyzing trace with hash 905671435, now seen corresponding path program 1 times [2022-11-25 18:02:11,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:11,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954075006] [2022-11-25 18:02:11,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:11,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:11,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:11,860 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:02:11,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 18:02:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:11,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:02:11,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:11,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:11,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:12,017 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:02:12,017 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 [2022-11-25 18:02:12,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-25 18:02:12,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:12,073 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 [2022-11-25 18:02:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:12,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:12,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:02:12,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954075006] [2022-11-25 18:02:12,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954075006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:12,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:12,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:12,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137762723] [2022-11-25 18:02:12,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:12,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:12,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:02:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:12,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:12,352 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 398 [2022-11-25 18:02:12,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:12,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 398 [2022-11-25 18:02:12,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:12,865 INFO L130 PetriNetUnfolder]: 941/1382 cut-off events. [2022-11-25 18:02:12,865 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:02:12,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2827 conditions, 1382 events. 941/1382 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 6893 event pairs, 426 based on Foata normal form. 0/436 useless extension candidates. Maximal degree in co-relation 2812. Up to 1361 conditions per place. [2022-11-25 18:02:12,875 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-11-25 18:02:12,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 274 flow [2022-11-25 18:02:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 484 transitions. [2022-11-25 18:02:12,878 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4053601340033501 [2022-11-25 18:02:12,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 484 transitions. [2022-11-25 18:02:12,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 484 transitions. [2022-11-25 18:02:12,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:12,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 484 transitions. [2022-11-25 18:02:12,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,884 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,885 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 192 flow. Second operand 3 states and 484 transitions. [2022-11-25 18:02:12,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 274 flow [2022-11-25 18:02:12,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:12,887 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 189 flow [2022-11-25 18:02:12,888 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2022-11-25 18:02:12,889 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2022-11-25 18:02:12,889 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 189 flow [2022-11-25 18:02:12,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:12,890 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:02:12,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:13,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:13,115 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:02:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash 905671434, now seen corresponding path program 1 times [2022-11-25 18:02:13,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:13,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131438967] [2022-11-25 18:02:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:13,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:13,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:13,118 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:02:13,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 18:02:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:13,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:02:13,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:13,286 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-25 18:02:13,286 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-25 18:02:13,321 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 18:02:13,322 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 [2022-11-25 18:02:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:13,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:13,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:02:13,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131438967] [2022-11-25 18:02:13,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131438967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:13,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:13,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:02:13,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670747041] [2022-11-25 18:02:13,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:13,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:13,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:02:13,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:13,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:13,458 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 398 [2022-11-25 18:02:13,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:13,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 398 [2022-11-25 18:02:13,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:13,891 INFO L130 PetriNetUnfolder]: 872/1271 cut-off events. [2022-11-25 18:02:13,891 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:02:13,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2606 conditions, 1271 events. 872/1271 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 6261 event pairs, 393 based on Foata normal form. 0/427 useless extension candidates. Maximal degree in co-relation 2590. Up to 1250 conditions per place. [2022-11-25 18:02:13,899 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 40 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2022-11-25 18:02:13,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 267 flow [2022-11-25 18:02:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2022-11-25 18:02:13,902 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4036850921273032 [2022-11-25 18:02:13,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2022-11-25 18:02:13,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2022-11-25 18:02:13,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:13,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2022-11-25 18:02:13,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,908 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 189 flow. Second operand 3 states and 482 transitions. [2022-11-25 18:02:13,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 267 flow [2022-11-25 18:02:13,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:13,910 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 186 flow [2022-11-25 18:02:13,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2022-11-25 18:02:13,911 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2022-11-25 18:02:13,911 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 186 flow [2022-11-25 18:02:13,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,912 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:13,912 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 18:02:13,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:14,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:14,124 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:02:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2025380705, now seen corresponding path program 2 times [2022-11-25 18:02:14,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:14,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662377276] [2022-11-25 18:02:14,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:02:14,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:14,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:14,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:02:14,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 18:02:14,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:14,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:14,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:02:14,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:14,344 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:02:14,345 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 [2022-11-25 18:02:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:14,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:15,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:02:15,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662377276] [2022-11-25 18:02:15,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662377276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:15,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:02:15,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 18:02:15,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875279091] [2022-11-25 18:02:15,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:15,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:02:15,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:02:15,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:02:15,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:02:19,285 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 398 [2022-11-25 18:02:19,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 186 flow. Second operand has 12 states, 12 states have (on average 143.0) internal successors, (1716), 12 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:19,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:19,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 398 [2022-11-25 18:02:19,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:23,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:02:25,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:02:26,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:02:28,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:02:31,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:02:34,873 INFO L130 PetriNetUnfolder]: 2232/3285 cut-off events. [2022-11-25 18:02:34,873 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-11-25 18:02:34,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6669 conditions, 3285 events. 2232/3285 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 18073 event pairs, 1041 based on Foata normal form. 9/1116 useless extension candidates. Maximal degree in co-relation 6652. Up to 422 conditions per place. [2022-11-25 18:02:34,891 INFO L137 encePairwiseOnDemand]: 391/398 looper letters, 172 selfloop transitions, 29 changer transitions 0/203 dead transitions. [2022-11-25 18:02:34,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 203 transitions, 1016 flow [2022-11-25 18:02:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:02:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 18:02:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2056 transitions. [2022-11-25 18:02:34,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39737147274835716 [2022-11-25 18:02:34,900 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2056 transitions. [2022-11-25 18:02:34,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2056 transitions. [2022-11-25 18:02:34,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:34,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2056 transitions. [2022-11-25 18:02:34,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 158.15384615384616) internal successors, (2056), 13 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:34,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 398.0) internal successors, (5572), 14 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:34,918 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 398.0) internal successors, (5572), 14 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:34,918 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 186 flow. Second operand 13 states and 2056 transitions. [2022-11-25 18:02:34,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 203 transitions, 1016 flow [2022-11-25 18:02:34,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 203 transitions, 1015 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:34,923 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 393 flow [2022-11-25 18:02:34,923 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=393, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2022-11-25 18:02:34,924 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2022-11-25 18:02:34,924 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 393 flow [2022-11-25 18:02:34,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 143.0) internal successors, (1716), 12 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:34,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:34,925 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:02:34,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:35,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:35,139 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:02:35,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:35,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1988962352, now seen corresponding path program 1 times [2022-11-25 18:02:35,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:35,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587361128] [2022-11-25 18:02:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:35,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:35,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:35,142 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:02:35,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 18:02:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:35,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:02:35,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:35,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:35,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:02:35,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587361128] [2022-11-25 18:02:35,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587361128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:35,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:35,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:35,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202196154] [2022-11-25 18:02:35,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:35,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:35,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:02:35,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:35,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:35,571 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 398 [2022-11-25 18:02:35,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 393 flow. Second operand has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:35,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:35,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 398 [2022-11-25 18:02:35,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:36,606 INFO L130 PetriNetUnfolder]: 2388/3714 cut-off events. [2022-11-25 18:02:36,607 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-25 18:02:36,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7649 conditions, 3714 events. 2388/3714 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 22647 event pairs, 1208 based on Foata normal form. 8/1457 useless extension candidates. Maximal degree in co-relation 7623. Up to 3208 conditions per place. [2022-11-25 18:02:36,621 INFO L137 encePairwiseOnDemand]: 386/398 looper letters, 76 selfloop transitions, 3 changer transitions 2/83 dead transitions. [2022-11-25 18:02:36,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 83 transitions, 698 flow [2022-11-25 18:02:36,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:02:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:02:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 652 transitions. [2022-11-25 18:02:36,624 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40954773869346733 [2022-11-25 18:02:36,624 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 652 transitions. [2022-11-25 18:02:36,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 652 transitions. [2022-11-25 18:02:36,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:36,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 652 transitions. [2022-11-25 18:02:36,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:36,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:36,630 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:36,630 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 393 flow. Second operand 4 states and 652 transitions. [2022-11-25 18:02:36,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 83 transitions, 698 flow [2022-11-25 18:02:36,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 615 flow, removed 21 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:36,636 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 353 flow [2022-11-25 18:02:36,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=353, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2022-11-25 18:02:36,637 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2022-11-25 18:02:36,637 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 353 flow [2022-11-25 18:02:36,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:36,638 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:36,638 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:36,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:36,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:36,850 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:02:36,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:36,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1674129610, now seen corresponding path program 1 times [2022-11-25 18:02:36,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:36,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460487921] [2022-11-25 18:02:36,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:36,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:36,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:36,853 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:02:36,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 18:02:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:36,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:02:36,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:37,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:37,035 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:02:37,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460487921] [2022-11-25 18:02:37,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460487921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:37,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:37,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:02:37,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342520160] [2022-11-25 18:02:37,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:37,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:37,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:02:37,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:37,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:37,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 398 [2022-11-25 18:02:37,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 353 flow. Second operand has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:37,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:37,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 398 [2022-11-25 18:02:37,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:37,983 INFO L130 PetriNetUnfolder]: 2205/3426 cut-off events. [2022-11-25 18:02:37,983 INFO L131 PetriNetUnfolder]: For 363/363 co-relation queries the response was YES. [2022-11-25 18:02:37,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8650 conditions, 3426 events. 2205/3426 cut-off events. For 363/363 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 20882 event pairs, 1094 based on Foata normal form. 10/1775 useless extension candidates. Maximal degree in co-relation 8622. Up to 3259 conditions per place. [2022-11-25 18:02:38,000 INFO L137 encePairwiseOnDemand]: 387/398 looper letters, 57 selfloop transitions, 13 changer transitions 0/72 dead transitions. [2022-11-25 18:02:38,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 533 flow [2022-11-25 18:02:38,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:02:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:02:38,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 649 transitions. [2022-11-25 18:02:38,003 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40766331658291455 [2022-11-25 18:02:38,003 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 649 transitions. [2022-11-25 18:02:38,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 649 transitions. [2022-11-25 18:02:38,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:38,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 649 transitions. [2022-11-25 18:02:38,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:38,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:38,009 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:38,009 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 353 flow. Second operand 4 states and 649 transitions. [2022-11-25 18:02:38,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 533 flow [2022-11-25 18:02:38,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 72 transitions, 527 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:38,016 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 411 flow [2022-11-25 18:02:38,017 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=411, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2022-11-25 18:02:38,017 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2022-11-25 18:02:38,018 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 411 flow [2022-11-25 18:02:38,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:38,018 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:38,018 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:38,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-11-25 18:02:38,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:38,230 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:02:38,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1674129614, now seen corresponding path program 1 times [2022-11-25 18:02:38,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:38,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292939265] [2022-11-25 18:02:38,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:38,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:38,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:38,232 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:02:38,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 18:02:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:38,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:02:38,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:38,457 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:02:38,457 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 [2022-11-25 18:02:38,527 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:02:38,528 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 [2022-11-25 18:02:38,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:38,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 18:02:38,688 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:02:38,688 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 [2022-11-25 18:02:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:38,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:41,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:02:41,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292939265] [2022-11-25 18:02:41,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292939265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:41,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:02:41,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 18:02:41,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004326496] [2022-11-25 18:02:41,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:41,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:02:41,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:02:41,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:02:41,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:02:44,922 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 398 [2022-11-25 18:02:44,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 411 flow. Second operand has 8 states, 8 states have (on average 134.5) internal successors, (1076), 8 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:44,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:44,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 398 [2022-11-25 18:02:44,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:56,726 INFO L130 PetriNetUnfolder]: 5690/9434 cut-off events. [2022-11-25 18:02:56,726 INFO L131 PetriNetUnfolder]: For 3096/3096 co-relation queries the response was YES. [2022-11-25 18:02:56,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28334 conditions, 9434 events. 5690/9434 cut-off events. For 3096/3096 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 73458 event pairs, 2264 based on Foata normal form. 8/6269 useless extension candidates. Maximal degree in co-relation 28304. Up to 4745 conditions per place. [2022-11-25 18:02:56,802 INFO L137 encePairwiseOnDemand]: 385/398 looper letters, 189 selfloop transitions, 52 changer transitions 21/264 dead transitions. [2022-11-25 18:02:56,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 264 transitions, 1835 flow [2022-11-25 18:02:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 18:02:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 18:02:56,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2496 transitions. [2022-11-25 18:02:56,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3689033402305646 [2022-11-25 18:02:56,811 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2496 transitions. [2022-11-25 18:02:56,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2496 transitions. [2022-11-25 18:02:56,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:56,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2496 transitions. [2022-11-25 18:02:56,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 146.8235294117647) internal successors, (2496), 17 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:56,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 398.0) internal successors, (7164), 18 states have internal predecessors, (7164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:56,831 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 398.0) internal successors, (7164), 18 states have internal predecessors, (7164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:56,832 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 411 flow. Second operand 17 states and 2496 transitions. [2022-11-25 18:02:56,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 264 transitions, 1835 flow [2022-11-25 18:02:56,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 264 transitions, 1780 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-11-25 18:02:56,854 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 904 flow [2022-11-25 18:02:56,854 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=904, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2022-11-25 18:02:56,855 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 40 predicate places. [2022-11-25 18:02:56,855 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 904 flow [2022-11-25 18:02:56,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 134.5) internal successors, (1076), 8 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:56,856 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:56,856 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:56,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-25 18:02:57,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:57,068 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:02:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:57,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1674129613, now seen corresponding path program 1 times [2022-11-25 18:02:57,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:57,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805644876] [2022-11-25 18:02:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:57,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:57,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:57,071 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:02:57,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 18:02:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:57,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:02:57,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:57,255 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:02:57,256 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 [2022-11-25 18:02:57,288 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 18:02:57,288 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 [2022-11-25 18:02:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:57,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:57,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:02:57,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805644876] [2022-11-25 18:02:57,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805644876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:57,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:57,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:57,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598302296] [2022-11-25 18:02:57,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:57,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:57,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:02:57,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:57,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:57,471 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 398 [2022-11-25 18:02:57,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 904 flow. Second operand has 4 states, 4 states have (on average 149.5) internal successors, (598), 4 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:57,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:57,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 398 [2022-11-25 18:02:57,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:59,014 INFO L130 PetriNetUnfolder]: 3892/6649 cut-off events. [2022-11-25 18:02:59,015 INFO L131 PetriNetUnfolder]: For 18954/18954 co-relation queries the response was YES. [2022-11-25 18:02:59,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24995 conditions, 6649 events. 3892/6649 cut-off events. For 18954/18954 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 50645 event pairs, 2403 based on Foata normal form. 515/6049 useless extension candidates. Maximal degree in co-relation 24951. Up to 6500 conditions per place. [2022-11-25 18:02:59,066 INFO L137 encePairwiseOnDemand]: 394/398 looper letters, 82 selfloop transitions, 12 changer transitions 1/97 dead transitions. [2022-11-25 18:02:59,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 97 transitions, 1084 flow [2022-11-25 18:02:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:02:59,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:02:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 619 transitions. [2022-11-25 18:02:59,068 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3888190954773869 [2022-11-25 18:02:59,068 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 619 transitions. [2022-11-25 18:02:59,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 619 transitions. [2022-11-25 18:02:59,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:59,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 619 transitions. [2022-11-25 18:02:59,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:59,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:59,074 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:59,074 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 904 flow. Second operand 4 states and 619 transitions. [2022-11-25 18:02:59,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 97 transitions, 1084 flow [2022-11-25 18:02:59,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 1078 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-25 18:02:59,133 INFO L231 Difference]: Finished difference. Result has 96 places, 96 transitions, 904 flow [2022-11-25 18:02:59,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=904, PETRI_PLACES=96, PETRI_TRANSITIONS=96} [2022-11-25 18:02:59,134 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2022-11-25 18:02:59,134 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 96 transitions, 904 flow [2022-11-25 18:02:59,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.5) internal successors, (598), 4 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:59,135 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:59,135 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:59,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-25 18:02:59,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:59,347 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:02:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:59,347 INFO L85 PathProgramCache]: Analyzing trace with hash 366700472, now seen corresponding path program 1 times [2022-11-25 18:02:59,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:59,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600998842] [2022-11-25 18:02:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:59,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:02:59,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:59,349 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:02:59,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 18:02:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:59,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 18:02:59,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:59,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 18:02:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:59,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:59,671 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:59,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 62 [2022-11-25 18:03:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:03:00,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:03:00,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600998842] [2022-11-25 18:03:00,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600998842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:03:00,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:03:00,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-25 18:03:00,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648309019] [2022-11-25 18:03:00,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:03:00,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:03:00,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:03:00,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:03:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:03:06,435 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 398 [2022-11-25 18:03:06,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 96 transitions, 904 flow. Second operand has 8 states, 8 states have (on average 137.5) internal successors, (1100), 8 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:06,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:03:06,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 398 [2022-11-25 18:03:06,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:11,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:03:14,114 INFO L130 PetriNetUnfolder]: 3488/6038 cut-off events. [2022-11-25 18:03:14,114 INFO L131 PetriNetUnfolder]: For 17867/17867 co-relation queries the response was YES. [2022-11-25 18:03:14,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22500 conditions, 6038 events. 3488/6038 cut-off events. For 17867/17867 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 45627 event pairs, 2013 based on Foata normal form. 0/5321 useless extension candidates. Maximal degree in co-relation 22454. Up to 3448 conditions per place. [2022-11-25 18:03:14,160 INFO L137 encePairwiseOnDemand]: 391/398 looper letters, 130 selfloop transitions, 46 changer transitions 0/178 dead transitions. [2022-11-25 18:03:14,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 178 transitions, 1849 flow [2022-11-25 18:03:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:03:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:03:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1448 transitions. [2022-11-25 18:03:14,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36381909547738694 [2022-11-25 18:03:14,167 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1448 transitions. [2022-11-25 18:03:14,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1448 transitions. [2022-11-25 18:03:14,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:03:14,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1448 transitions. [2022-11-25 18:03:14,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 144.8) internal successors, (1448), 10 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:14,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:14,181 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:14,181 INFO L175 Difference]: Start difference. First operand has 96 places, 96 transitions, 904 flow. Second operand 10 states and 1448 transitions. [2022-11-25 18:03:14,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 178 transitions, 1849 flow [2022-11-25 18:03:14,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 178 transitions, 1818 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-11-25 18:03:14,244 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 1046 flow [2022-11-25 18:03:14,245 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1046, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2022-11-25 18:03:14,245 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2022-11-25 18:03:14,246 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 1046 flow [2022-11-25 18:03:14,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 137.5) internal successors, (1100), 8 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:14,247 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:03:14,247 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:03:14,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:03:14,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:03:14,469 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:03:14,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:03:14,469 INFO L85 PathProgramCache]: Analyzing trace with hash 366700471, now seen corresponding path program 1 times [2022-11-25 18:03:14,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:03:14,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27603161] [2022-11-25 18:03:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:14,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:03:14,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:03:14,472 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:03:14,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 18:03:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:14,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:03:14,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:03:14,613 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 [2022-11-25 18:03:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:03:14,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:03:14,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:03:14,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27603161] [2022-11-25 18:03:14,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27603161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:03:14,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:03:14,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:03:14,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453013720] [2022-11-25 18:03:14,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:03:14,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:03:14,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:03:14,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:03:14,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:03:14,897 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 398 [2022-11-25 18:03:14,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 1046 flow. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:14,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:03:14,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 398 [2022-11-25 18:03:14,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:15,803 INFO L130 PetriNetUnfolder]: 2271/4159 cut-off events. [2022-11-25 18:03:15,803 INFO L131 PetriNetUnfolder]: For 19639/19639 co-relation queries the response was YES. [2022-11-25 18:03:15,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16185 conditions, 4159 events. 2271/4159 cut-off events. For 19639/19639 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 31234 event pairs, 1380 based on Foata normal form. 782/4843 useless extension candidates. Maximal degree in co-relation 16138. Up to 3986 conditions per place. [2022-11-25 18:03:15,832 INFO L137 encePairwiseOnDemand]: 394/398 looper letters, 75 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2022-11-25 18:03:15,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 96 transitions, 1200 flow [2022-11-25 18:03:15,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:03:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:03:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 617 transitions. [2022-11-25 18:03:15,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38756281407035176 [2022-11-25 18:03:15,835 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 617 transitions. [2022-11-25 18:03:15,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 617 transitions. [2022-11-25 18:03:15,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:03:15,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 617 transitions. [2022-11-25 18:03:15,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:15,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:15,840 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:15,840 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 1046 flow. Second operand 4 states and 617 transitions. [2022-11-25 18:03:15,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 96 transitions, 1200 flow [2022-11-25 18:03:15,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 96 transitions, 1093 flow, removed 24 selfloop flow, removed 4 redundant places. [2022-11-25 18:03:15,887 INFO L231 Difference]: Finished difference. Result has 102 places, 96 transitions, 943 flow [2022-11-25 18:03:15,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=943, PETRI_PLACES=102, PETRI_TRANSITIONS=96} [2022-11-25 18:03:15,887 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2022-11-25 18:03:15,888 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 96 transitions, 943 flow [2022-11-25 18:03:15,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:15,888 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:03:15,888 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:03:15,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 18:03:16,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:03:16,100 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:03:16,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:03:16,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1517184213, now seen corresponding path program 1 times [2022-11-25 18:03:16,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:03:16,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943525529] [2022-11-25 18:03:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:16,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:03:16,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:03:16,102 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:03:16,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 18:03:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:16,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:03:16,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:03:16,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:03:16,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:03:16,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:03:16,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 19 [2022-11-25 18:03:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:03:17,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:03:17,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 62 [2022-11-25 18:03:17,346 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 53 treesize of output 49 [2022-11-25 18:03:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:03:18,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:03:18,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943525529] [2022-11-25 18:03:18,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943525529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:03:18,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:03:18,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 18:03:18,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62948719] [2022-11-25 18:03:18,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:03:18,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:03:18,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:03:18,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:03:18,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:03:26,283 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 398 [2022-11-25 18:03:26,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 96 transitions, 943 flow. Second operand has 10 states, 10 states have (on average 138.6) internal successors, (1386), 10 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:26,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:03:26,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 398 [2022-11-25 18:03:26,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:51,109 INFO L130 PetriNetUnfolder]: 3253/5786 cut-off events. [2022-11-25 18:03:51,109 INFO L131 PetriNetUnfolder]: For 17275/17275 co-relation queries the response was YES. [2022-11-25 18:03:51,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22401 conditions, 5786 events. 3253/5786 cut-off events. For 17275/17275 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 44089 event pairs, 627 based on Foata normal form. 353/6138 useless extension candidates. Maximal degree in co-relation 22354. Up to 2487 conditions per place. [2022-11-25 18:03:51,166 INFO L137 encePairwiseOnDemand]: 385/398 looper letters, 156 selfloop transitions, 60 changer transitions 20/238 dead transitions. [2022-11-25 18:03:51,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 238 transitions, 2146 flow [2022-11-25 18:03:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 18:03:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 18:03:51,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2913 transitions. [2022-11-25 18:03:51,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3659547738693467 [2022-11-25 18:03:51,175 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2913 transitions. [2022-11-25 18:03:51,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2913 transitions. [2022-11-25 18:03:51,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:03:51,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2913 transitions. [2022-11-25 18:03:51,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 145.65) internal successors, (2913), 20 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:51,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 398.0) internal successors, (8358), 21 states have internal predecessors, (8358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:51,193 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 398.0) internal successors, (8358), 21 states have internal predecessors, (8358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:51,194 INFO L175 Difference]: Start difference. First operand has 102 places, 96 transitions, 943 flow. Second operand 20 states and 2913 transitions. [2022-11-25 18:03:51,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 238 transitions, 2146 flow [2022-11-25 18:03:51,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 238 transitions, 2122 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:03:51,271 INFO L231 Difference]: Finished difference. Result has 125 places, 112 transitions, 1309 flow [2022-11-25 18:03:51,272 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1309, PETRI_PLACES=125, PETRI_TRANSITIONS=112} [2022-11-25 18:03:51,272 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2022-11-25 18:03:51,272 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 112 transitions, 1309 flow [2022-11-25 18:03:51,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.6) internal successors, (1386), 10 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:03:51,273 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:03:51,273 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:03:51,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-25 18:03:51,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:03:51,485 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:03:51,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:03:51,486 INFO L85 PathProgramCache]: Analyzing trace with hash 218025276, now seen corresponding path program 1 times [2022-11-25 18:03:51,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:03:51,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819904006] [2022-11-25 18:03:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:03:51,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:03:51,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:03:51,488 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:03:51,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 18:03:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:03:51,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 18:03:51,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:03:51,812 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:03:51,812 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 [2022-11-25 18:03:51,912 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:03:51,912 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 [2022-11-25 18:03:52,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:03:52,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 18:03:52,096 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:03:52,097 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 [2022-11-25 18:03:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:03:52,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:03:52,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:03:52,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 62 [2022-11-25 18:03:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:03:58,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:03:58,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819904006] [2022-11-25 18:03:58,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819904006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:03:58,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:03:58,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 18:03:58,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138687144] [2022-11-25 18:03:58,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:03:58,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:03:58,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:03:58,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:03:58,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:04:04,179 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] [2022-11-25 18:04:07,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 398 [2022-11-25 18:04:07,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 112 transitions, 1309 flow. Second operand has 8 states, 8 states have (on average 134.25) internal successors, (1074), 8 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:07,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:07,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 398 [2022-11-25 18:04:07,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:14,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:21,207 WARN L233 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:32,009 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:37,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:40,526 INFO L130 PetriNetUnfolder]: 3663/6481 cut-off events. [2022-11-25 18:04:40,526 INFO L131 PetriNetUnfolder]: For 45043/45043 co-relation queries the response was YES. [2022-11-25 18:04:40,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28983 conditions, 6481 events. 3663/6481 cut-off events. For 45043/45043 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 49265 event pairs, 1922 based on Foata normal form. 227/6663 useless extension candidates. Maximal degree in co-relation 28930. Up to 2748 conditions per place. [2022-11-25 18:04:40,584 INFO L137 encePairwiseOnDemand]: 389/398 looper letters, 142 selfloop transitions, 40 changer transitions 0/184 dead transitions. [2022-11-25 18:04:40,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 184 transitions, 2180 flow [2022-11-25 18:04:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 18:04:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 18:04:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2072 transitions. [2022-11-25 18:04:40,592 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34706867671691793 [2022-11-25 18:04:40,592 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2072 transitions. [2022-11-25 18:04:40,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2072 transitions. [2022-11-25 18:04:40,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:40,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2072 transitions. [2022-11-25 18:04:40,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 138.13333333333333) internal successors, (2072), 15 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:40,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 398.0) internal successors, (6368), 16 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:40,604 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 398.0) internal successors, (6368), 16 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:40,605 INFO L175 Difference]: Start difference. First operand has 125 places, 112 transitions, 1309 flow. Second operand 15 states and 2072 transitions. [2022-11-25 18:04:40,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 184 transitions, 2180 flow [2022-11-25 18:04:40,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 184 transitions, 2136 flow, removed 19 selfloop flow, removed 2 redundant places. [2022-11-25 18:04:40,719 INFO L231 Difference]: Finished difference. Result has 140 places, 113 transitions, 1387 flow [2022-11-25 18:04:40,719 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1387, PETRI_PLACES=140, PETRI_TRANSITIONS=113} [2022-11-25 18:04:40,720 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2022-11-25 18:04:40,720 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 113 transitions, 1387 flow [2022-11-25 18:04:40,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 134.25) internal successors, (1074), 8 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:40,721 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:40,721 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1] [2022-11-25 18:04:40,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:40,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:40,935 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:04:40,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:40,935 INFO L85 PathProgramCache]: Analyzing trace with hash -856856775, now seen corresponding path program 1 times [2022-11-25 18:04:40,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:40,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563955703] [2022-11-25 18:04:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:40,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:40,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:40,937 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:40,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 18:04:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:41,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:04:41,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:41,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 18:04:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:04:41,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:04:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:04:44,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:44,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563955703] [2022-11-25 18:04:44,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563955703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:04:44,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:04:44,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-25 18:04:44,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329619761] [2022-11-25 18:04:44,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:04:44,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:04:44,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:44,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:04:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:05:00,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 398 [2022-11-25 18:05:00,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 113 transitions, 1387 flow. Second operand has 18 states, 18 states have (on average 143.05555555555554) internal successors, (2575), 18 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:00,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:00,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 398 [2022-11-25 18:05:00,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:05,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:05:07,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:05:09,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:05:11,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:05:13,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:05:14,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:05:16,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:05:29,862 INFO L130 PetriNetUnfolder]: 8419/14741 cut-off events. [2022-11-25 18:05:29,862 INFO L131 PetriNetUnfolder]: For 111538/111538 co-relation queries the response was YES. [2022-11-25 18:05:29,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68594 conditions, 14741 events. 8419/14741 cut-off events. For 111538/111538 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 119659 event pairs, 4807 based on Foata normal form. 36/14763 useless extension candidates. Maximal degree in co-relation 68538. Up to 6472 conditions per place. [2022-11-25 18:05:30,018 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 622 selfloop transitions, 49 changer transitions 0/673 dead transitions. [2022-11-25 18:05:30,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 673 transitions, 9179 flow [2022-11-25 18:05:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 18:05:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 18:05:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2873 transitions. [2022-11-25 18:05:30,022 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4010329424902289 [2022-11-25 18:05:30,022 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2873 transitions. [2022-11-25 18:05:30,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2873 transitions. [2022-11-25 18:05:30,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:30,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2873 transitions. [2022-11-25 18:05:30,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 159.61111111111111) internal successors, (2873), 18 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:30,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 398.0) internal successors, (7562), 19 states have internal predecessors, (7562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:30,032 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 398.0) internal successors, (7562), 19 states have internal predecessors, (7562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:30,033 INFO L175 Difference]: Start difference. First operand has 140 places, 113 transitions, 1387 flow. Second operand 18 states and 2873 transitions. [2022-11-25 18:05:30,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 673 transitions, 9179 flow [2022-11-25 18:05:30,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 673 transitions, 8997 flow, removed 59 selfloop flow, removed 8 redundant places. [2022-11-25 18:05:30,376 INFO L231 Difference]: Finished difference. Result has 159 places, 126 transitions, 1691 flow [2022-11-25 18:05:30,376 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1691, PETRI_PLACES=159, PETRI_TRANSITIONS=126} [2022-11-25 18:05:30,377 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2022-11-25 18:05:30,377 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 126 transitions, 1691 flow [2022-11-25 18:05:30,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 143.05555555555554) internal successors, (2575), 18 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:30,378 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:30,378 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:30,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:30,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:30,587 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:05:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash -873601039, now seen corresponding path program 2 times [2022-11-25 18:05:30,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:05:30,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627982362] [2022-11-25 18:05:30,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:05:30,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:30,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:05:30,590 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:05:30,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 18:05:30,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:05:30,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:05:30,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:05:30,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:30,846 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:05:30,847 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 [2022-11-25 18:05:30,974 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:05:30,974 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 [2022-11-25 18:05:31,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:05:31,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 18:05:31,143 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:05:31,144 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 [2022-11-25 18:05:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 18:05:31,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:05:31,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:05:31,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627982362] [2022-11-25 18:05:31,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627982362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:05:31,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:05:31,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:05:31,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049241083] [2022-11-25 18:05:31,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:05:31,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:05:31,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:05:31,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:05:31,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:05:31,610 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 398 [2022-11-25 18:05:31,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 126 transitions, 1691 flow. Second operand has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:31,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:31,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 398 [2022-11-25 18:05:31,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:34,880 INFO L130 PetriNetUnfolder]: 7109/12590 cut-off events. [2022-11-25 18:05:34,880 INFO L131 PetriNetUnfolder]: For 96793/96793 co-relation queries the response was YES. [2022-11-25 18:05:34,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53336 conditions, 12590 events. 7109/12590 cut-off events. For 96793/96793 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 101646 event pairs, 4031 based on Foata normal form. 791/13107 useless extension candidates. Maximal degree in co-relation 53270. Up to 12313 conditions per place. [2022-11-25 18:05:35,029 INFO L137 encePairwiseOnDemand]: 394/398 looper letters, 109 selfloop transitions, 12 changer transitions 0/123 dead transitions. [2022-11-25 18:05:35,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 123 transitions, 1878 flow [2022-11-25 18:05:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:05:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:05:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 599 transitions. [2022-11-25 18:05:35,032 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37625628140703515 [2022-11-25 18:05:35,032 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 599 transitions. [2022-11-25 18:05:35,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 599 transitions. [2022-11-25 18:05:35,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:35,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 599 transitions. [2022-11-25 18:05:35,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:35,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:35,035 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:35,035 INFO L175 Difference]: Start difference. First operand has 159 places, 126 transitions, 1691 flow. Second operand 4 states and 599 transitions. [2022-11-25 18:05:35,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 123 transitions, 1878 flow [2022-11-25 18:05:35,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 123 transitions, 1730 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-11-25 18:05:35,181 INFO L231 Difference]: Finished difference. Result has 147 places, 123 transitions, 1512 flow [2022-11-25 18:05:35,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1512, PETRI_PLACES=147, PETRI_TRANSITIONS=123} [2022-11-25 18:05:35,182 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2022-11-25 18:05:35,182 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 123 transitions, 1512 flow [2022-11-25 18:05:35,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:35,183 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:35,183 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:35,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:35,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:35,385 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:05:35,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:35,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1116226663, now seen corresponding path program 1 times [2022-11-25 18:05:35,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:05:35,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926262370] [2022-11-25 18:05:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:05:35,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:35,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:05:35,388 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:05:35,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 18:05:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:05:35,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:05:35,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:05:35,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:05:36,050 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 35 treesize of output 31 [2022-11-25 18:05:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:05:36,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:05:36,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926262370] [2022-11-25 18:05:36,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926262370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:05:36,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:05:36,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 18:05:36,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942998547] [2022-11-25 18:05:36,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:05:36,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:05:36,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:05:36,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:05:36,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:05:40,370 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 398 [2022-11-25 18:05:40,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 123 transitions, 1512 flow. Second operand has 12 states, 12 states have (on average 144.5) internal successors, (1734), 12 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:40,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:40,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 398 [2022-11-25 18:05:40,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:44,981 INFO L130 PetriNetUnfolder]: 5825/10876 cut-off events. [2022-11-25 18:05:44,981 INFO L131 PetriNetUnfolder]: For 51639/51639 co-relation queries the response was YES. [2022-11-25 18:05:45,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43968 conditions, 10876 events. 5825/10876 cut-off events. For 51639/51639 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 89616 event pairs, 2025 based on Foata normal form. 944/11818 useless extension candidates. Maximal degree in co-relation 43907. Up to 4914 conditions per place. [2022-11-25 18:05:45,112 INFO L137 encePairwiseOnDemand]: 389/398 looper letters, 86 selfloop transitions, 81 changer transitions 20/189 dead transitions. [2022-11-25 18:05:45,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 189 transitions, 2197 flow [2022-11-25 18:05:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:05:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:05:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1825 transitions. [2022-11-25 18:05:45,115 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38211892797319935 [2022-11-25 18:05:45,115 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1825 transitions. [2022-11-25 18:05:45,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1825 transitions. [2022-11-25 18:05:45,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:45,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1825 transitions. [2022-11-25 18:05:45,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 152.08333333333334) internal successors, (1825), 12 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:45,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 398.0) internal successors, (5174), 13 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:45,121 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 398.0) internal successors, (5174), 13 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:45,122 INFO L175 Difference]: Start difference. First operand has 147 places, 123 transitions, 1512 flow. Second operand 12 states and 1825 transitions. [2022-11-25 18:05:45,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 189 transitions, 2197 flow [2022-11-25 18:05:45,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 189 transitions, 2120 flow, removed 32 selfloop flow, removed 2 redundant places. [2022-11-25 18:05:45,253 INFO L231 Difference]: Finished difference. Result has 162 places, 131 transitions, 1754 flow [2022-11-25 18:05:45,253 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1754, PETRI_PLACES=162, PETRI_TRANSITIONS=131} [2022-11-25 18:05:45,254 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 107 predicate places. [2022-11-25 18:05:45,254 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 131 transitions, 1754 flow [2022-11-25 18:05:45,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 144.5) internal successors, (1734), 12 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:45,254 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:45,255 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:45,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-25 18:05:45,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:45,456 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:05:45,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:45,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1914076234, now seen corresponding path program 2 times [2022-11-25 18:05:45,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:05:45,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80072520] [2022-11-25 18:05:45,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:05:45,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:45,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:05:45,458 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:05:45,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 18:05:45,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:05:45,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:05:45,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 18:05:45,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:45,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 18:05:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 18:05:45,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:05:45,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:05:45,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80072520] [2022-11-25 18:05:45,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80072520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:05:45,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:05:45,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:05:45,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857901179] [2022-11-25 18:05:45,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:05:45,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:05:45,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:05:45,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:05:45,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:05:46,200 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 398 [2022-11-25 18:05:46,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 131 transitions, 1754 flow. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:46,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:46,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 398 [2022-11-25 18:05:46,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:48,049 INFO L130 PetriNetUnfolder]: 3536/6581 cut-off events. [2022-11-25 18:05:48,050 INFO L131 PetriNetUnfolder]: For 53022/53022 co-relation queries the response was YES. [2022-11-25 18:05:48,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25490 conditions, 6581 events. 3536/6581 cut-off events. For 53022/53022 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 49460 event pairs, 1889 based on Foata normal form. 1210/7617 useless extension candidates. Maximal degree in co-relation 25423. Up to 6308 conditions per place. [2022-11-25 18:05:48,126 INFO L137 encePairwiseOnDemand]: 394/398 looper letters, 89 selfloop transitions, 29 changer transitions 0/120 dead transitions. [2022-11-25 18:05:48,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 120 transitions, 1853 flow [2022-11-25 18:05:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:05:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:05:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 613 transitions. [2022-11-25 18:05:48,129 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3850502512562814 [2022-11-25 18:05:48,129 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 613 transitions. [2022-11-25 18:05:48,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 613 transitions. [2022-11-25 18:05:48,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:48,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 613 transitions. [2022-11-25 18:05:48,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:48,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:48,131 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:48,131 INFO L175 Difference]: Start difference. First operand has 162 places, 131 transitions, 1754 flow. Second operand 4 states and 613 transitions. [2022-11-25 18:05:48,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 120 transitions, 1853 flow [2022-11-25 18:05:48,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 120 transitions, 1574 flow, removed 35 selfloop flow, removed 15 redundant places. [2022-11-25 18:05:48,286 INFO L231 Difference]: Finished difference. Result has 144 places, 120 transitions, 1396 flow [2022-11-25 18:05:48,286 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1396, PETRI_PLACES=144, PETRI_TRANSITIONS=120} [2022-11-25 18:05:48,286 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2022-11-25 18:05:48,286 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 120 transitions, 1396 flow [2022-11-25 18:05:48,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:48,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:48,287 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-25 18:05:48,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:48,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:48,488 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:05:48,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:48,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1010569823, now seen corresponding path program 3 times [2022-11-25 18:05:48,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:05:48,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998286030] [2022-11-25 18:05:48,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:05:48,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:48,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:05:48,490 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:05:48,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 18:05:48,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 18:05:48,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:05:48,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 18:05:48,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:48,883 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:05:48,883 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 [2022-11-25 18:05:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:05:49,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:05:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:05:54,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:05:54,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998286030] [2022-11-25 18:05:54,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998286030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:05:54,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:05:54,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-25 18:05:54,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637134627] [2022-11-25 18:05:54,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:05:54,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 18:05:54,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:05:54,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 18:05:54,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-25 18:06:22,323 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 398 [2022-11-25 18:06:22,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 120 transitions, 1396 flow. Second operand has 24 states, 24 states have (on average 143.0) internal successors, (3432), 24 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:22,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:06:22,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 398 [2022-11-25 18:06:22,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:06:37,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:06:40,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:06:42,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:06:44,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:06:46,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:06:48,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:06:50,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:06:52,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:06:54,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:06:56,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:07:08,624 INFO L130 PetriNetUnfolder]: 3732/6975 cut-off events. [2022-11-25 18:07:08,625 INFO L131 PetriNetUnfolder]: For 18393/18393 co-relation queries the response was YES. [2022-11-25 18:07:08,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22341 conditions, 6975 events. 3732/6975 cut-off events. For 18393/18393 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 52747 event pairs, 1995 based on Foata normal form. 12/6975 useless extension candidates. Maximal degree in co-relation 22285. Up to 1772 conditions per place. [2022-11-25 18:07:08,681 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 345 selfloop transitions, 71 changer transitions 0/418 dead transitions. [2022-11-25 18:07:08,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 418 transitions, 4602 flow [2022-11-25 18:07:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 18:07:08,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 18:07:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3638 transitions. [2022-11-25 18:07:08,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38086264656616414 [2022-11-25 18:07:08,689 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3638 transitions. [2022-11-25 18:07:08,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3638 transitions. [2022-11-25 18:07:08,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:08,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3638 transitions. [2022-11-25 18:07:08,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 151.58333333333334) internal successors, (3638), 24 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:08,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 398.0) internal successors, (9950), 25 states have internal predecessors, (9950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:08,707 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 398.0) internal successors, (9950), 25 states have internal predecessors, (9950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:08,707 INFO L175 Difference]: Start difference. First operand has 144 places, 120 transitions, 1396 flow. Second operand 24 states and 3638 transitions. [2022-11-25 18:07:08,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 418 transitions, 4602 flow [2022-11-25 18:07:08,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 418 transitions, 4421 flow, removed 48 selfloop flow, removed 2 redundant places. [2022-11-25 18:07:08,817 INFO L231 Difference]: Finished difference. Result has 178 places, 147 transitions, 1871 flow [2022-11-25 18:07:08,817 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1871, PETRI_PLACES=178, PETRI_TRANSITIONS=147} [2022-11-25 18:07:08,818 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 123 predicate places. [2022-11-25 18:07:08,818 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 147 transitions, 1871 flow [2022-11-25 18:07:08,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 143.0) internal successors, (3432), 24 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:08,818 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:08,819 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:08,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-25 18:07:09,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:07:09,019 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:07:09,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:09,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1888955096, now seen corresponding path program 1 times [2022-11-25 18:07:09,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:07:09,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228440790] [2022-11-25 18:07:09,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:09,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:07:09,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:07:09,021 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:07:09,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-25 18:07:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:09,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 18:07:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:07:09,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:07:09,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 28 [2022-11-25 18:07:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:07:09,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:07:09,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:07:09,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 135 treesize of output 30 [2022-11-25 18:07:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:07:10,093 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:07:10,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228440790] [2022-11-25 18:07:10,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228440790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:07:10,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:07:10,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-25 18:07:10,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402248838] [2022-11-25 18:07:10,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:07:10,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:07:10,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:07:10,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:07:10,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:07:11,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 398 [2022-11-25 18:07:11,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 147 transitions, 1871 flow. Second operand has 10 states, 10 states have (on average 148.0) internal successors, (1480), 10 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:11,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 398 [2022-11-25 18:07:11,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:14,157 INFO L130 PetriNetUnfolder]: 3984/7224 cut-off events. [2022-11-25 18:07:14,157 INFO L131 PetriNetUnfolder]: For 14698/14698 co-relation queries the response was YES. [2022-11-25 18:07:14,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22626 conditions, 7224 events. 3984/7224 cut-off events. For 14698/14698 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 53182 event pairs, 559 based on Foata normal form. 3/7215 useless extension candidates. Maximal degree in co-relation 22556. Up to 5390 conditions per place. [2022-11-25 18:07:14,224 INFO L137 encePairwiseOnDemand]: 389/398 looper letters, 88 selfloop transitions, 77 changer transitions 11/178 dead transitions. [2022-11-25 18:07:14,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 178 transitions, 2346 flow [2022-11-25 18:07:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:07:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:07:14,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1503 transitions. [2022-11-25 18:07:14,228 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37763819095477386 [2022-11-25 18:07:14,228 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1503 transitions. [2022-11-25 18:07:14,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1503 transitions. [2022-11-25 18:07:14,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:14,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1503 transitions. [2022-11-25 18:07:14,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 150.3) internal successors, (1503), 10 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:14,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:14,234 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:14,234 INFO L175 Difference]: Start difference. First operand has 178 places, 147 transitions, 1871 flow. Second operand 10 states and 1503 transitions. [2022-11-25 18:07:14,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 178 transitions, 2346 flow [2022-11-25 18:07:14,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 178 transitions, 2205 flow, removed 30 selfloop flow, removed 9 redundant places. [2022-11-25 18:07:14,280 INFO L231 Difference]: Finished difference. Result has 180 places, 144 transitions, 1873 flow [2022-11-25 18:07:14,281 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1873, PETRI_PLACES=180, PETRI_TRANSITIONS=144} [2022-11-25 18:07:14,281 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2022-11-25 18:07:14,281 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 144 transitions, 1873 flow [2022-11-25 18:07:14,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 148.0) internal successors, (1480), 10 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:14,282 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:14,282 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1] [2022-11-25 18:07:14,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-25 18:07:14,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:07:14,484 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:07:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash -254689573, now seen corresponding path program 2 times [2022-11-25 18:07:14,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:07:14,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512919277] [2022-11-25 18:07:14,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:07:14,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:07:14,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:07:14,488 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:07:14,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-25 18:07:14,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:07:14,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:07:14,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 18:07:14,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:07:14,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 18:07:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:16,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:07:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:25,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:07:25,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512919277] [2022-11-25 18:07:25,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512919277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:07:25,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:07:25,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2022-11-25 18:07:25,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838948261] [2022-11-25 18:07:25,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:07:25,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 18:07:25,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:07:25,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 18:07:25,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 18:08:27,116 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 398 [2022-11-25 18:08:27,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 144 transitions, 1873 flow. Second operand has 36 states, 36 states have (on average 143.02777777777777) internal successors, (5149), 36 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:27,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:27,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 398 [2022-11-25 18:08:27,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:56,134 WARN L233 SmtUtils]: Spent 18.60s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:08:58,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:00,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:02,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:04,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:06,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:08,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:10,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:12,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:15,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:17,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:19,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:21,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:23,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:25,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:27,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:29,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:09:39,033 WARN L233 SmtUtils]: Spent 7.11s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:09:49,863 WARN L233 SmtUtils]: Spent 9.04s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:09:59,787 WARN L233 SmtUtils]: Spent 7.90s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:10:08,698 WARN L233 SmtUtils]: Spent 7.13s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:10:50,421 INFO L130 PetriNetUnfolder]: 8081/15091 cut-off events. [2022-11-25 18:10:50,421 INFO L131 PetriNetUnfolder]: For 62550/62550 co-relation queries the response was YES. [2022-11-25 18:10:50,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49629 conditions, 15091 events. 8081/15091 cut-off events. For 62550/62550 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 117918 event pairs, 4330 based on Foata normal form. 72/15155 useless extension candidates. Maximal degree in co-relation 49556. Up to 3062 conditions per place. [2022-11-25 18:10:50,629 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 928 selfloop transitions, 86 changer transitions 0/1016 dead transitions. [2022-11-25 18:10:50,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1016 transitions, 11928 flow [2022-11-25 18:10:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 18:10:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-25 18:10:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5636 transitions. [2022-11-25 18:10:50,640 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39335566722501397 [2022-11-25 18:10:50,640 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5636 transitions. [2022-11-25 18:10:50,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5636 transitions. [2022-11-25 18:10:50,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:50,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5636 transitions. [2022-11-25 18:10:50,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 156.55555555555554) internal successors, (5636), 36 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:50,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 398.0) internal successors, (14726), 37 states have internal predecessors, (14726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:50,669 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 398.0) internal successors, (14726), 37 states have internal predecessors, (14726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:50,669 INFO L175 Difference]: Start difference. First operand has 180 places, 144 transitions, 1873 flow. Second operand 36 states and 5636 transitions. [2022-11-25 18:10:50,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 1016 transitions, 11928 flow [2022-11-25 18:10:50,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 1016 transitions, 11329 flow, removed 131 selfloop flow, removed 8 redundant places. [2022-11-25 18:10:50,908 INFO L231 Difference]: Finished difference. Result has 224 places, 165 transitions, 2395 flow [2022-11-25 18:10:50,908 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2395, PETRI_PLACES=224, PETRI_TRANSITIONS=165} [2022-11-25 18:10:50,909 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 169 predicate places. [2022-11-25 18:10:50,909 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 165 transitions, 2395 flow [2022-11-25 18:10:50,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 143.02777777777777) internal successors, (5149), 36 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:50,909 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:50,910 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:50,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-25 18:10:51,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:10:51,110 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:10:51,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:51,111 INFO L85 PathProgramCache]: Analyzing trace with hash 755690531, now seen corresponding path program 1 times [2022-11-25 18:10:51,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:10:51,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779300931] [2022-11-25 18:10:51,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:51,111 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:10:51,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:10:51,112 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:10:51,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-25 18:10:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:51,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:10:51,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:10:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:10:51,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:10:51,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:10:51,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779300931] [2022-11-25 18:10:51,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779300931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:51,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:51,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:10:51,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994146889] [2022-11-25 18:10:51,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:51,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:10:51,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:10:51,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:10:51,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:10:51,515 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 398 [2022-11-25 18:10:51,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 165 transitions, 2395 flow. Second operand has 5 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:51,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:51,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 398 [2022-11-25 18:10:51,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:58,169 INFO L130 PetriNetUnfolder]: 11315/21467 cut-off events. [2022-11-25 18:10:58,191 INFO L131 PetriNetUnfolder]: For 39938/39938 co-relation queries the response was YES. [2022-11-25 18:10:58,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64041 conditions, 21467 events. 11315/21467 cut-off events. For 39938/39938 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 171418 event pairs, 3788 based on Foata normal form. 392/21859 useless extension candidates. Maximal degree in co-relation 63950. Up to 11556 conditions per place. [2022-11-25 18:10:58,615 INFO L137 encePairwiseOnDemand]: 393/398 looper letters, 184 selfloop transitions, 18 changer transitions 13/215 dead transitions. [2022-11-25 18:10:58,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 215 transitions, 3149 flow [2022-11-25 18:10:58,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:10:58,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:10:58,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 805 transitions. [2022-11-25 18:10:58,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4045226130653266 [2022-11-25 18:10:58,619 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 805 transitions. [2022-11-25 18:10:58,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 805 transitions. [2022-11-25 18:10:58,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:58,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 805 transitions. [2022-11-25 18:10:58,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:58,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 398.0) internal successors, (2388), 6 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:58,624 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 398.0) internal successors, (2388), 6 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:58,624 INFO L175 Difference]: Start difference. First operand has 224 places, 165 transitions, 2395 flow. Second operand 5 states and 805 transitions. [2022-11-25 18:10:58,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 215 transitions, 3149 flow [2022-11-25 18:10:58,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 215 transitions, 3000 flow, removed 19 selfloop flow, removed 15 redundant places. [2022-11-25 18:10:58,829 INFO L231 Difference]: Finished difference. Result has 216 places, 168 transitions, 2353 flow [2022-11-25 18:10:58,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2353, PETRI_PLACES=216, PETRI_TRANSITIONS=168} [2022-11-25 18:10:58,830 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 161 predicate places. [2022-11-25 18:10:58,830 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 168 transitions, 2353 flow [2022-11-25 18:10:58,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:58,830 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:58,831 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:58,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-25 18:10:59,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:10:59,032 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:10:59,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:59,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1567313792, now seen corresponding path program 2 times [2022-11-25 18:10:59,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:10:59,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402170464] [2022-11-25 18:10:59,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:10:59,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:10:59,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:10:59,035 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:10:59,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-25 18:10:59,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:10:59,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:10:59,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:10:59,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:10:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:10:59,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:10:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:10:59,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:10:59,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402170464] [2022-11-25 18:10:59,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402170464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:10:59,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:10:59,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-25 18:10:59,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019375337] [2022-11-25 18:10:59,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:10:59,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:10:59,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:10:59,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:10:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:10:59,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 398 [2022-11-25 18:10:59,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 168 transitions, 2353 flow. Second operand has 10 states, 10 states have (on average 152.5) internal successors, (1525), 10 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:59,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:59,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 398 [2022-11-25 18:10:59,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:09,415 INFO L130 PetriNetUnfolder]: 16492/30676 cut-off events. [2022-11-25 18:11:09,415 INFO L131 PetriNetUnfolder]: For 78380/78380 co-relation queries the response was YES. [2022-11-25 18:11:09,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107956 conditions, 30676 events. 16492/30676 cut-off events. For 78380/78380 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 253105 event pairs, 1968 based on Foata normal form. 1520/32196 useless extension candidates. Maximal degree in co-relation 107862. Up to 8897 conditions per place. [2022-11-25 18:11:09,967 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 203 selfloop transitions, 33 changer transitions 1/237 dead transitions. [2022-11-25 18:11:09,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 237 transitions, 3293 flow [2022-11-25 18:11:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:11:09,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:11:09,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1270 transitions. [2022-11-25 18:11:09,971 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39886934673366836 [2022-11-25 18:11:09,971 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1270 transitions. [2022-11-25 18:11:09,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1270 transitions. [2022-11-25 18:11:09,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:09,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1270 transitions. [2022-11-25 18:11:09,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 158.75) internal successors, (1270), 8 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:09,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 398.0) internal successors, (3582), 9 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:09,978 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 398.0) internal successors, (3582), 9 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:09,979 INFO L175 Difference]: Start difference. First operand has 216 places, 168 transitions, 2353 flow. Second operand 8 states and 1270 transitions. [2022-11-25 18:11:09,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 237 transitions, 3293 flow [2022-11-25 18:11:11,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 237 transitions, 3200 flow, removed 38 selfloop flow, removed 2 redundant places. [2022-11-25 18:11:11,095 INFO L231 Difference]: Finished difference. Result has 225 places, 186 transitions, 2608 flow [2022-11-25 18:11:11,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2608, PETRI_PLACES=225, PETRI_TRANSITIONS=186} [2022-11-25 18:11:11,095 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 170 predicate places. [2022-11-25 18:11:11,096 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 186 transitions, 2608 flow [2022-11-25 18:11:11,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 152.5) internal successors, (1525), 10 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:11,096 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:11,096 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:11,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-25 18:11:11,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:11:11,298 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:11:11,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:11,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1962268169, now seen corresponding path program 2 times [2022-11-25 18:11:11,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:11:11,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299163760] [2022-11-25 18:11:11,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:11:11,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:11:11,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:11:11,300 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:11:11,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-25 18:11:11,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:11:11,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:11:11,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:11:11,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:11:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:11:11,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:11:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:11:11,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:11:11,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299163760] [2022-11-25 18:11:11,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299163760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:11:11,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:11:11,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-25 18:11:11,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506400225] [2022-11-25 18:11:11,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:11:11,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:11:11,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:11:11,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:11:11,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:11:12,022 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 398 [2022-11-25 18:11:12,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 186 transitions, 2608 flow. Second operand has 10 states, 10 states have (on average 152.3) internal successors, (1523), 10 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:12,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:12,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 398 [2022-11-25 18:11:12,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:31,299 INFO L130 PetriNetUnfolder]: 28131/52327 cut-off events. [2022-11-25 18:11:31,299 INFO L131 PetriNetUnfolder]: For 236338/236338 co-relation queries the response was YES. [2022-11-25 18:11:32,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232070 conditions, 52327 events. 28131/52327 cut-off events. For 236338/236338 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 465645 event pairs, 4400 based on Foata normal form. 950/53277 useless extension candidates. Maximal degree in co-relation 231972. Up to 18143 conditions per place. [2022-11-25 18:11:32,486 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 227 selfloop transitions, 56 changer transitions 6/289 dead transitions. [2022-11-25 18:11:32,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 289 transitions, 4174 flow [2022-11-25 18:11:32,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:11:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:11:32,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1569 transitions. [2022-11-25 18:11:32,491 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39422110552763817 [2022-11-25 18:11:32,491 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1569 transitions. [2022-11-25 18:11:32,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1569 transitions. [2022-11-25 18:11:32,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:32,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1569 transitions. [2022-11-25 18:11:32,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 156.9) internal successors, (1569), 10 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:32,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:32,499 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:32,499 INFO L175 Difference]: Start difference. First operand has 225 places, 186 transitions, 2608 flow. Second operand 10 states and 1569 transitions. [2022-11-25 18:11:32,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 289 transitions, 4174 flow [2022-11-25 18:11:46,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 289 transitions, 4080 flow, removed 18 selfloop flow, removed 2 redundant places. [2022-11-25 18:11:46,160 INFO L231 Difference]: Finished difference. Result has 237 places, 223 transitions, 3162 flow [2022-11-25 18:11:46,160 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3162, PETRI_PLACES=237, PETRI_TRANSITIONS=223} [2022-11-25 18:11:46,161 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 182 predicate places. [2022-11-25 18:11:46,161 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 223 transitions, 3162 flow [2022-11-25 18:11:46,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 152.3) internal successors, (1523), 10 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:46,162 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:46,162 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:46,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-25 18:11:46,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:11:46,367 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:11:46,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:46,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2036056111, now seen corresponding path program 3 times [2022-11-25 18:11:46,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:11:46,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731343240] [2022-11-25 18:11:46,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:11:46,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:11:46,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:11:46,369 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:11:46,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98a1696b-89fe-4a96-b32c-70e66c1c5c1d/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-25 18:11:46,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:11:46,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:11:46,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:11:46,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:11:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:11:46,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:11:46,775 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:11:46,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731343240] [2022-11-25 18:11:46,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731343240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:46,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:46,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:11:46,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021687843] [2022-11-25 18:11:46,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:46,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:11:46,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:11:46,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:11:46,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:11:46,910 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 398 [2022-11-25 18:11:46,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 223 transitions, 3162 flow. Second operand has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:46,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:46,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 398 [2022-11-25 18:11:46,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand